1
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Dai T, Tang A, Meng Y, Dong C, Cong P, Lu J, Du J, Zhong Y, Zhou E. Optimizing Molecular Crystallinity and Suppressing Electron-Phonon Coupling in Completely Non-Fused Ring Electron Acceptors for Organic Solar Cells. Angew Chem Int Ed Engl 2024; 63:e202403051. [PMID: 38499468 DOI: 10.1002/anie.202403051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2024] [Revised: 03/17/2024] [Accepted: 03/18/2024] [Indexed: 03/20/2024]
Abstract
High open-circuit voltage (Voc) organic solar cells (OSCs) have received increasing attention because of their promising application in tandem devices and indoor photovoltaics. However, the lack of a precise correlation between molecular structure and stacking behaviors of wide band gap electron acceptors has greatly limited its development. Here, we adopted an asymmetric halogenation strategy (AHS) and synthesized two completely non-fused ring electron acceptors (NFREAs), HF-BTA33 and HCl-BTA33. The results show that AHS significantly enhances the molecular dipoles and suppresses electron-phonon coupling, resulting in enhanced intramolecular/intermolecular interactions and decreased nonradiative decay. As a result, PTQ10 : HF-BTA33 realizes a power conversion efficiency (PCE) of 11.42 % with a Voc of 1.232 V, higher than that of symmetric analogue F-BTA33 (PCE=10.02 %, Voc=1.197 V). Notably, PTQ10 : HCl-BTA33 achieves the highest PCE of 12.54 % with a Voc of 1.201 V due to the long-range ordered π-π packing and enhanced surface electrostatic interactions thereby facilitating exciton dissociation and charge transport. This work not only proves that asymmetric halogenation of completely NFREAs is a simple and effective strategy for achieving both high PCE and Voc, but also provides deeper insights for the precise molecular design of low cost completely NFREAs.
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Affiliation(s)
- Tingting Dai
- National Center for Nanoscience and Technology, Beijing, 100190, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Ailing Tang
- National Center for Nanoscience and Technology, Beijing, 100190, China
| | - Yuhan Meng
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, China
| | - Chuanqi Dong
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, China
| | - Peiqing Cong
- National Center for Nanoscience and Technology, Beijing, 100190, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jiahao Lu
- College of Chemistry and Chemical Engineering, Guangxi Minzu University, Nanning, 530006, China
| | - Jimin Du
- School of Chemistry and Chemical Engineering, Anyang Normal University, Anyang, Henan Province, 455002, China
| | - Yufei Zhong
- School of Materials Science and Engineering, NingboTech University, Ningbo, 315100, China
| | - Erjun Zhou
- National Center for Nanoscience and Technology, Beijing, 100190, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
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2
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Niharika Bhuyan N, Shankar S S, Jyoti Panda S, Shekhar Purohit C, Singhal R, Sharma GD, Mishra A. An Asymmetric Coumarin-Anthracene Conjugate as Efficient Fullerene-Free Acceptor for Organic Solar Cells. Angew Chem Int Ed Engl 2024:e202406272. [PMID: 38739535 DOI: 10.1002/anie.202406272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2024] [Revised: 05/12/2024] [Accepted: 05/13/2024] [Indexed: 05/16/2024]
Abstract
Asymmetric wide-band gap fullerene-free acceptors (FFAs) play a crucial role in organic solar cells (OSCs). Here, we designed and synthesized a simple asymmetric coumarin-anthracene conjugate named CA-CN with optical band gap of 2.1 eV in a single-step condensation reaction. Single crystal X-ray structure analysis confirms various multiple intermolecular non-covalent interactions. The molecular orbital energy levels of CA-CN estimated from cyclic voltammetry were found to be suitable for its use as an acceptor for OSCs. Binary OSCs fabricated using CA-CN as acceptor and PTB7-Th as the donor achieve a power conversion efficiency (PCE) of 11.13 %. We further demonstrate that the insertion of 20 wt % of CA-CN as a third component in ternary OSCs with PTB7-Th : DICTF as the host material achieved an impressive PCE of 14.91 %, an improvement of ~43 % compared to the PTB7-Th : DICTF binary device (10.38 %). Importantly, the ternary blend enhances the absorption coverage from 400 to 800 nm and improves the morphology of the active layer. The findings highlight the efficacy of an asymmetric design approach for FFAs, which paves the way for developing high-efficiency OSCs at low cost.
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Affiliation(s)
| | - Shyam Shankar S
- Department of Physics, The LNM Institute of Information Technology, Deemed University), Rupa ki Nagal, Jamdoli, 302031, Jaipur, Rajasthan, India
| | - Subhra Jyoti Panda
- School of Chemical Sciences, National Institute of Science Education and Research, Jatni, 752050, Bhubaneswar, Orissa, India
| | - Chandra Shekhar Purohit
- School of Chemical Sciences, National Institute of Science Education and Research, Jatni, 752050, Bhubaneswar, Orissa, India
| | - Rahul Singhal
- Department of Physics, Malaviya National Institute of Technology, 302017, Jaipur, Rajasthan, India
| | - Ganesh D Sharma
- Department of Physics, The LNM Institute of Information Technology, Deemed University), Rupa ki Nagal, Jamdoli, 302031, Jaipur, Rajasthan, India
| | - Amaresh Mishra
- School of Chemistry, Sambalpur University, 768019, Jyoti Vihar, Sambalpur, India
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3
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Liu Y, Guo J, Zhou H, Li C, Guo X. Correlating π-π Stacking of Aromatic Diammoniums with Stability and Dimensional Reduction of Dion-Jacobson 2D Perovskites. J Am Chem Soc 2024; 146:8198-8205. [PMID: 38478884 DOI: 10.1021/jacs.3c12756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/28/2024]
Abstract
Dion-Jacobson (DJ) phase 2D perovskites with various aromatic diammonium cations, potentially possessing high stability, have been developed for optoelectronics. However, their stability does not meet initial expectations, and some of them even easily degrade into lower-dimensional structures. Underlying the stability mechanism and dimensional reduction of these DJ 2D perovskites remains elusive. Herein, we report that π-π stacking intensity between aromatic cations determines structural stability and dimensional variation of DJ 2D perovskites by investigating nine benzene diammoniums (BDAs)-derived low-dimensional perovskites. The BDAs without intermolecular π-π stacking form stable DJ 2D perovskites, while those showing strong π-π stacking tend to generate 1D and 0D architectures. Furthermore, the π-π stacking intensity highly relies on molecular symmetry and electrostatic potential of BDAs; namely, asymmetry and small dipole moment facilitate alleviating the π-π stacking, leading to the formation of DJ 2D perovskites and vice versa. Our findings establish the relationship of aromatic diammonium structure-π-π stacking interaction-perovskite dimensionality, which can guide the design of stable DJ 2D perovskites and the manipulation of perovskite dimensionality for various optoelectronic applications.
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Affiliation(s)
- Yang Liu
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, 457 Zhongshan Road, Dalian 116023, China
| | - Junxue Guo
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, 457 Zhongshan Road, Dalian 116023, China
- School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, China
| | - Hongpeng Zhou
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, 457 Zhongshan Road, Dalian 116023, China
| | - Can Li
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, 457 Zhongshan Road, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xin Guo
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, 457 Zhongshan Road, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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4
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Gao W, Ma R, Dela Peña TA, Yan C, Li H, Li M, Wu J, Cheng P, Zhong C, Wei Z, Jen AKY, Li G. Efficient all-small-molecule organic solar cells processed with non-halogen solvent. Nat Commun 2024; 15:1946. [PMID: 38431627 PMCID: PMC10908865 DOI: 10.1038/s41467-024-46144-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Accepted: 02/14/2024] [Indexed: 03/05/2024] Open
Abstract
All-small-molecule organic solar cells with good batch-to-batch reproducibility combined with non-halogen solvent processing show great potential for commercialization. However, non-halogen solvent processing of all-small-molecule organic solar cells are rarely reported and its power conversion efficiencies are very difficult to improve. Herein, we designed and synthesized a small molecule donor BM-ClEH that can take advantage of strong aggregation property induced by intramolecular chlorine-sulfur non-covalent interaction to improve molecular pre-aggregation in tetrahydrofuran and corresponding micromorphology after film formation. Tetrahydrofuran-fabricated all-small-molecule organic solar cells based on BM-ClEH:BO-4Cl achieved high power conversion efficiencies of 15.0% in binary device and 16.1% in ternary device under thermal annealing treatment. In contrast, weakly aggregated BM-HEH without chlorine-sulfur non-covalent bond is almost inefficient under same processing conditions due to poor pre-aggregation induced disordered π-π stacking, indistinct phase separation and exciton dissociation. This work promotes the development of non-halogen solvent processing of all-small-molecule organic solar cells and provides further guidance.
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Affiliation(s)
- Wei Gao
- Xiamen Key Laboratory of Optoelectronic Materials and Advanced Manufacturing, Institute of Luminescent Materials and Information Displays, College of Materials Science and Engineering, Huaqiao University, Xiamen, 361021, China
| | - Ruijie Ma
- Department of Electrical and Electronic Engineering, Research Institute for Smart Energy (RISE), The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, 999077, China.
| | - Top Archie Dela Peña
- Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong, 999077, China
- Advanced Materials Thrust, Function Hub, The Hong Kong University of Science and Technology, Nansha, Guangzhou, 511442, China
| | - Cenqi Yan
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610064, China
| | - Hongxiang Li
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610064, China.
| | - Mingjie Li
- Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong, 999077, China
| | - Jiaying Wu
- Advanced Materials Thrust, Function Hub, The Hong Kong University of Science and Technology, Nansha, Guangzhou, 511442, China
| | - Pei Cheng
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610064, China
| | - Cheng Zhong
- Department of Chemistry, Hubei Key Lab on Organic and Polymeric Optoelectronic Materials, Wuhan University, Wuhan, 430072, China
| | - Zhanhua Wei
- Xiamen Key Laboratory of Optoelectronic Materials and Advanced Manufacturing, Institute of Luminescent Materials and Information Displays, College of Materials Science and Engineering, Huaqiao University, Xiamen, 361021, China
| | - Alex K-Y Jen
- Department of Materials Science and Engineering, City University of Hong Kong, Kowloon, 999077, Hong Kong, China.
- Hong Kong Institute for Clean Energy, City University of Hong Kong, Kowloon, 999077, Hong Kong, China.
| | - Gang Li
- Department of Electrical and Electronic Engineering, Research Institute for Smart Energy (RISE), The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, 999077, China.
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5
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Ji X, Wang T, Fu Q, Liu D, Wu Z, Zhang M, Woo HY, Liu Y. Deciphering the Effects of Molecular Dipole Moments on the Photovoltaic Performance of Organic Solar Cells. Macromol Rapid Commun 2023; 44:e2300213. [PMID: 37230735 DOI: 10.1002/marc.202300213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 05/11/2023] [Indexed: 05/27/2023]
Abstract
The dielectronic constant of organic semiconductor materials is directly related to its molecule dipole moment, which can be used to guide the design of high-performance organic photovoltaic materials. Herein, two isomeric small molecule acceptors, ANDT-2F and CNDT-2F, are designed and synthesized by using the electron localization effect of alkoxy in different positions of naphthalene. It is found that the axisymmetric ANDT-2F exhibits a larger dipole moment, which can improve exciton dissociation and charge generation efficiencies due to the strong intramolecular charge transfer effect, resulting in the higher photovoltaic performance of devices. Moreover, PBDB-T:ANDT-2F blend film exhibits larger and more balanced hole and electron mobility as well as nanoscale phase separation due to the favorable miscibility. As a result, the optimized device based on axisymmetric ANDT-2F shows a JSC of 21.30 mA cm-2 , an FF of 66.21%, and a power conversion energy of 12.13%, higher than that of centrosymmetric CNDT-2F-based device. This work provides important implications for designing and synthesizing efficient organic photovoltaic materials by tuning their dipole moment.
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Affiliation(s)
- Xiaofei Ji
- The Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials, Institute of Polymer Chemistry, College of Chemistry and Renewable Energy Conversion and Storage Center (RECAST), Nankai University, Tianjin, 300071, China
- The Interdisciplinary Research Center Shanghai Advanced Research Institute Chinese Academy of Sciences 99 Haike Road, Zhangjiang Hi-Tech Park Pudong, Shanghai, 201210, China
| | - Ting Wang
- The Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials, Institute of Polymer Chemistry, College of Chemistry and Renewable Energy Conversion and Storage Center (RECAST), Nankai University, Tianjin, 300071, China
- Shaanxi Coal Chemical Industry Technology Research Institute Co. LTD, Xi'an, 710076, China
| | - Qiang Fu
- The Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials, Institute of Polymer Chemistry, College of Chemistry and Renewable Energy Conversion and Storage Center (RECAST), Nankai University, Tianjin, 300071, China
- Department of Materials Science and Engineering, City University of Hong Kong, Kowloon, 999077, Hong Kong
| | - Dongxue Liu
- Institute of Science and Technology, China Three Gorges Corporation, Beijing, 100038, China
| | - Ziang Wu
- Department of Chemistry, Korea University, Seoul, 02841, South Korea
| | - Mingtao Zhang
- The Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials, Institute of Polymer Chemistry, College of Chemistry and Renewable Energy Conversion and Storage Center (RECAST), Nankai University, Tianjin, 300071, China
| | - Han Young Woo
- Department of Chemistry, Korea University, Seoul, 02841, South Korea
| | - Yongsheng Liu
- The Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials, Institute of Polymer Chemistry, College of Chemistry and Renewable Energy Conversion and Storage Center (RECAST), Nankai University, Tianjin, 300071, China
- Haihe Laboratory of Sustainable Chemical Transformations, Tianjin, 300192, China
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6
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Wu H, He X, Du X, Wang D, Li W, Chen H, Fang W, Zhao L. The Linkage-Moderated Covalent Organic Frameworks with C=N and NN on Charge Transfer Kinetics Towards the Robust Photocatalytic Hydrogen Activity. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2304367. [PMID: 37566780 DOI: 10.1002/smll.202304367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 07/15/2023] [Indexed: 08/13/2023]
Abstract
Since the linkages structured in covalent organic frameworks (COFs) usually impact the charge transfer behavior during photocatalytic hydrogen evolution reaction (pc-HER), linkage dependence on charge transfer kinetics should be further claimed. Herein, COFs with N-based linkages and pyrene-based building nodes are constructed to enable us to obtain new clues about the charge transfer behavior and evolution tendency relevant to linkages at a molecular level for pc-HER. It is demonstrated that photo-excited electrons preferably move to the N sites in C=N linkage for pc-HER and are trapped around NN linkage as well. A high electron transfer rate does not point to high photocatalytic activity directly, while a small difference between the electron transfer rate and electron recombination rate ΔkCT - CR predicts the inefficiency of charge transfer in Azod-COFs. Contrarily, large value of ΔkCT - CR in the case of Benzd-COFs, demonstrats an unimpeded charge transfer process to result in boosted pc-HER rate (2027.3 µmol h-1 g-1 ). This work offers a prominent strategy for the reasonable design of efficient photocatalysts at the molecular level for structural regulation and achieves an efficient charge transfer process for the pc-HER process.
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Affiliation(s)
- Haiyang Wu
- The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science & Technology, Wuhan, 430081, P. R. China
| | - Xuan He
- The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science & Technology, Wuhan, 430081, P. R. China
| | - Xing Du
- The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science & Technology, Wuhan, 430081, P. R. China
| | - Daheng Wang
- The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science & Technology, Wuhan, 430081, P. R. China
| | - Weixin Li
- The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science & Technology, Wuhan, 430081, P. R. China
| | - Hui Chen
- The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science & Technology, Wuhan, 430081, P. R. China
| | - Wei Fang
- The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science & Technology, Wuhan, 430081, P. R. China
| | - Lei Zhao
- The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science & Technology, Wuhan, 430081, P. R. China
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7
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Khatua R, Das B, Mondal A. Rational design of non-fullerene acceptors via side-chain and terminal group engineering: a computational study. Phys Chem Chem Phys 2023; 25:7994-8004. [PMID: 36872908 DOI: 10.1039/d2cp05958d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
We investigated the optoelectronic and photovoltaic properties of three types of acceptor-donor-acceptor-based non-fullerene acceptor (NFA) molecules for organic solar cell (OSC) applications. Density functional theory and its time-dependent variant were employed to compute the quadrupole moment perpendicular to the π-system (Q20), open circuit voltage (VOC), and other relevant solar cell parameters. The role of functionalization in the acceptor unit on the overall device performance was explored by incorporating halogen and methoxy-based electron-withdrawing groups. The electronegativity differences between the halogen atoms and the methoxy group demonstrated contrasting effects on the energy levels, molecular orbitals, and absorption maximum. We observed a trade-off between short-circuit current (JSC) and VOC, which was further substantiated by an inverse correlation between Q20 and VOC. We found an optimum value of Q20 in the range of 80 to 130 ea02 to achieve an optimized solar cell performance. Among the designed systems, Se-derived NFAs with a small band gap, red-shifted absorption maximum, high-oscillator strength, small exciton binding energy, and optimum Q20 turned out to be potential candidates for future applications. These criteria can be generalized to design and screen next-generation non-fullerene acceptors to achieve improved OSC performance.
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Affiliation(s)
- Rudranarayan Khatua
- Discipline of Chemistry, Indian Institute of Technology Gandhinagar, Gujarat, 382355, India.
| | - Bibhas Das
- Discipline of Chemistry, Indian Institute of Technology Gandhinagar, Gujarat, 382355, India.
| | - Anirban Mondal
- Discipline of Chemistry, Indian Institute of Technology Gandhinagar, Gujarat, 382355, India.
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8
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Regioregular Asymmetric Diketopyrrolopyrrole Copolymers with Good Molecular Ordered Assembly Ability for High-performance Polymer Transistors. CHINESE JOURNAL OF POLYMER SCIENCE 2023. [DOI: 10.1007/s10118-023-2918-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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9
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You Z, Wang B, Zhao Z, Zhang Q, Song W, Zhang C, Long X, Xia Y. Metal-Free Carbon-Based Covalent Organic Frameworks with Heteroatom-Free Units Boost Efficient Oxygen Reduction. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2209129. [PMID: 36427268 DOI: 10.1002/adma.202209129] [Citation(s) in RCA: 22] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 11/04/2022] [Indexed: 06/16/2023]
Abstract
Accurate identification of carbon-based metal-free electrocatalyst (CMFE) activity and enhancing their catalytic efficiency for O2 conversion is an urgent and challenging task. This study reports a promising strategy to simultaneously develop a series of covalent organic frameworks (COFs) with well-defined heterocyclic-free biphenyl or fluorenyl units. Unlike heteroatom doping, the developed method not only supplies methyl-induced molecular configuration to promote activity, but also provides a direct opportunity to identify heteroatom-free carbon active centers. The introduction of methyl groups (MGs) with reversible valence bonds into a pristine biphenyl-based COF results in an excellent performance with a half-wave potential of 0.74 V versus the reversible hydrogen electrode (RHE), which is among the highest values for CMFE-COFs as oxygen reduction reaction (ORR) electrocatalysts. Combined with in situ Raman spectra and theoretical calculations, the MG-bound skeleton (DAF-COF) is found to produce ortho activation, confirming the ortho carbon (site-5) adjacent to MGs as active centers. This may be attributed to the opening and binding of MGs, which effectively regulate the molecular configuration and charge redistribution, as well as improve charge transfer and reduce the energy barrier. This study provides insight into the design of highly efficient metal-free organic electrocatalysts via the regulation of valence bonds.
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Affiliation(s)
- Zhihu You
- State Key Laboratory of Bio-fibers and Eco-textiles, Collaborative Innovation Center of Shandong Marine Biobased Fibers and Ecological Textiles, Institute of Marine Biobased Materials, College of Materials Science and Engineering, Qingdao University, Qingdao, 266071, P. R. China
| | - Bingbing Wang
- State Key Laboratory of Bio-fibers and Eco-textiles, Collaborative Innovation Center of Shandong Marine Biobased Fibers and Ecological Textiles, Institute of Marine Biobased Materials, College of Materials Science and Engineering, Qingdao University, Qingdao, 266071, P. R. China
| | - Zijie Zhao
- State Key Laboratory of Bio-fibers and Eco-textiles, Collaborative Innovation Center of Shandong Marine Biobased Fibers and Ecological Textiles, Institute of Marine Biobased Materials, College of Materials Science and Engineering, Qingdao University, Qingdao, 266071, P. R. China
| | - Qiankun Zhang
- State Key Laboratory of Bio-fibers and Eco-textiles, Collaborative Innovation Center of Shandong Marine Biobased Fibers and Ecological Textiles, Institute of Marine Biobased Materials, College of Materials Science and Engineering, Qingdao University, Qingdao, 266071, P. R. China
| | - Weichen Song
- State Key Laboratory of Bio-fibers and Eco-textiles, Collaborative Innovation Center of Shandong Marine Biobased Fibers and Ecological Textiles, Institute of Marine Biobased Materials, College of Materials Science and Engineering, Qingdao University, Qingdao, 266071, P. R. China
| | - Chuanhui Zhang
- State Key Laboratory of Bio-fibers and Eco-textiles, Collaborative Innovation Center of Shandong Marine Biobased Fibers and Ecological Textiles, Institute of Marine Biobased Materials, College of Materials Science and Engineering, Qingdao University, Qingdao, 266071, P. R. China
| | - Xiaojing Long
- State Key Laboratory of Bio-fibers and Eco-textiles, Collaborative Innovation Center of Shandong Marine Biobased Fibers and Ecological Textiles, Institute of Marine Biobased Materials, College of Materials Science and Engineering, Qingdao University, Qingdao, 266071, P. R. China
| | - Yanzhi Xia
- State Key Laboratory of Bio-fibers and Eco-textiles, Collaborative Innovation Center of Shandong Marine Biobased Fibers and Ecological Textiles, Institute of Marine Biobased Materials, College of Materials Science and Engineering, Qingdao University, Qingdao, 266071, P. R. China
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10
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Li C, Lu G, Ryu HS, Sun X, Woo HY, Sun Y. Effect of Terminal Electron-Withdrawing Group on the Photovoltaic Performance of Asymmetric Fused-Ring Electron Acceptors. ACS APPLIED MATERIALS & INTERFACES 2022; 14:43207-43214. [PMID: 36099472 DOI: 10.1021/acsami.2c10557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The terminal electron-withdrawing group is thought to strongly influence π-π stacking interactions and thereby the charge transport properties of fused-ring electron acceptors (FREAs). In this work, we designed and synthesized three asymmetric/symmetric small molecule FREAs (LC301, LC302, and LC303), in which three electron-withdrawing functional groups with different polarities (phenyl-fused indanone < thienyl-fused indanone < F-modified phenyl-fused indanone) were selected as the terminal groups. Photophysical properties, electrochemistry, charge transport, and crystalline properties of the materials were studied to investigate the effect of electron-withdrawing abilities of the terminal groups on the properties of FREAs. Starting from the symmetric LC302 (two thienyl-fused indanone terminal groups), we have found that by simply replacing only one thienyl-fused indanone terminal group in symmetric LC302 with one difluorinated phenyl-fused indanone terminal group, the asymmetric LC301-based organic solar cells (OSCs) can yield a high power conversion efficiency (PCE) of 17.21% and a promising fill factor (FF) of 78.1%, which are higher than those of symmetric LC302-based OSCs (PCE = 15.18%, FF = 73.3%) and the asymmetric LC303-based OSCs bearing one thienyl-fused indanone terminal group and one nonfluorinated phenyl-fused indanone terminal group (PCE = 14.28%, FF = 70.3%). The results indicate that the rational selection of terminal groups with different electron-withdrawing capabilities is highly desirable for designing high-performance asymmetric FREAs.
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Affiliation(s)
- Chao Li
- School of Chemistry, Beihang University, Beijing 100191, China
| | - Guangkai Lu
- School of Chemistry, Beihang University, Beijing 100191, China
| | - Hwa Sook Ryu
- Department of Chemistry, College of Science, Korea University, Seoul 136-713, Republic of Korea
| | - Xiaobo Sun
- School of Chemistry, Beihang University, Beijing 100191, China
| | - Han Young Woo
- Department of Chemistry, College of Science, Korea University, Seoul 136-713, Republic of Korea
| | - Yanming Sun
- School of Chemistry, Beihang University, Beijing 100191, China
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11
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Wang K, Guo Q, Nie Z, Wang H, Gao J, Zhang J, Yu L, Guo X, Zhang M. Asymmetric Non-Fullerene Small Molecule Acceptor with Unidirectional Non-Fused π-Bridge and Extended Terminal Group for High-Efficiency Organic Solar Cells. Int J Mol Sci 2022; 23:10079. [PMID: 36077476 PMCID: PMC9456090 DOI: 10.3390/ijms231710079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2022] [Revised: 08/31/2022] [Accepted: 09/01/2022] [Indexed: 11/24/2022] Open
Abstract
We designed and synthesized an asymmetric non-fullerene small molecule acceptor (NF-SMA) IDT-TNIC with an A-D-π-A structure, based on an indacenodithiophene (IDT) central core, with a unidirectional non-fused alkylthio-thiophene (T) π-bridge, and 2-(3-oxo-2,3-dihydro-1H-cyclopenta[b]naphthalen-1-ylidene)malononitrile (NIC) extended terminal groups. IDT-TNIC molecules still maintain a good coplanar structure, which benefits from the non-covalent conformational locks (NCL) between O···S and S···S. The asymmetric structure increases the molecular dipole moment, and the extended terminal group broadens the absorption of the material, resulting in an excellent photovoltaic performance of IDT-TNIC. The photovoltaic device, based on PBDB-T:IDT-TNIC, exhibits an energetic PCE of 11.32% with a high Voc of 0.87 V, high Jsc of 19.85 mA cm-2, and a low energy loss of 0.57 eV. More importantly, IDT-TNICs with asymmetric structures show a superior property compared to symmetric IDT-Ns. The results demonstrate that it is an effectual strategy to enhance the properties of asymmetric A-D-π-A-based NF-SMAs with non-fused NCL π-bridges and extended terminal groups.
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Affiliation(s)
- Kun Wang
- School of Materials and Chemical Engineering, Zhongyuan University of Technology, Zhengzhou 451191, China
| | - Qing Guo
- Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou 450003, China
- Laboratory of Advanced Optoelectronic Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Zengkun Nie
- School of Materials and Chemical Engineering, Zhongyuan University of Technology, Zhengzhou 451191, China
| | - Huiyan Wang
- School of Materials and Chemical Engineering, Zhongyuan University of Technology, Zhengzhou 451191, China
- Laboratory of Advanced Optoelectronic Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Jingshun Gao
- School of Materials and Chemical Engineering, Zhongyuan University of Technology, Zhengzhou 451191, China
| | - Jianqi Zhang
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China
| | - Linfeng Yu
- Laboratory of Advanced Optoelectronic Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Xia Guo
- Laboratory of Advanced Optoelectronic Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Maojie Zhang
- Laboratory of Advanced Optoelectronic Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
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12
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Du J, Hu K, Zhu C, Zhang J, Zhang Z, Wei Z, Meng L, Li Y. High-Performance Polymer Acceptor Synthesized by an Asymmetric Copolymerization Strategy. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c01276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jiaqi Du
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- School of Chemical Science, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ke Hu
- School of Chemical Science, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Can Zhu
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- School of Chemical Science, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jianqi Zhang
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China
| | - Zhanjun Zhang
- School of Chemical Science, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhixiang Wei
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China
| | - Lei Meng
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Yongfang Li
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- School of Chemical Science, University of Chinese Academy of Sciences, Beijing 100049, China
- Laboratory of Advanced Optoelectronic Materials, Suzhou Key Laboratory of Novel Semiconductor-Optoelectronics Materials and Devices, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu 215123, China
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13
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Gao W, Jiang M, Wu Z, Fan B, Jiang W, Cai N, Xie H, Lin FR, Luo J, An Q, Woo HY, Jen AK. Intramolecular Chloro–Sulfur Interaction and Asymmetric Side‐Chain Isomerization to Balance Crystallinity and Miscibility in All‐Small‐Molecule Solar Cells. Angew Chem Int Ed Engl 2022; 61:e202205168. [DOI: 10.1002/anie.202205168] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Indexed: 11/10/2022]
Affiliation(s)
- Wei Gao
- Department of Materials Science and Engineering City University of Hong Kong Kowloon 999077 Hong Kong Hong Kong
- Hong Kong Institute for Clean Energy City University of Hong Kong Kowloon 999077 Hong Kong Hong Kong
| | - Mengyun Jiang
- Key Laboratory of Cluster Science of Ministry of Education Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials School of Chemistry and Chemical Engineering Beijing Institute of Technology Beijing 100081 China
| | - Ziang Wu
- Department of Chemistry College of Science Korea University Seoul 136-713 Republic of Korea
| | - Baobing Fan
- Department of Materials Science and Engineering City University of Hong Kong Kowloon 999077 Hong Kong Hong Kong
- Hong Kong Institute for Clean Energy City University of Hong Kong Kowloon 999077 Hong Kong Hong Kong
| | - Wenlin Jiang
- Department of Materials Science and Engineering City University of Hong Kong Kowloon 999077 Hong Kong Hong Kong
- Hong Kong Institute for Clean Energy City University of Hong Kong Kowloon 999077 Hong Kong Hong Kong
| | - Ning Cai
- School of Chemical Engineering and Light Industry Guangdong University of Technology Guangzhou 510006 China
| | - Hua Xie
- School of Water Resources and Hydropower Wuhan University Wuhan 430072 China
| | - Francis R. Lin
- Department of Chemistry City University of Hong Kong Kowloon 999077 Hong Kong Hong Kong
- Hong Kong Institute for Clean Energy City University of Hong Kong Kowloon 999077 Hong Kong Hong Kong
| | - Jingdong Luo
- Department of Chemistry City University of Hong Kong Kowloon 999077 Hong Kong Hong Kong
- Hong Kong Institute for Clean Energy City University of Hong Kong Kowloon 999077 Hong Kong Hong Kong
| | - Qiaoshi An
- Key Laboratory of Cluster Science of Ministry of Education Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials School of Chemistry and Chemical Engineering Beijing Institute of Technology Beijing 100081 China
| | - Han Young Woo
- Department of Chemistry College of Science Korea University Seoul 136-713 Republic of Korea
| | - Alex K.‐Y. Jen
- Department of Materials Science and Engineering City University of Hong Kong Kowloon 999077 Hong Kong Hong Kong
- Department of Chemistry City University of Hong Kong Kowloon 999077 Hong Kong Hong Kong
- Department of Materials Science and Engineering University of Washington Seattle WA 98195-2120 USA
- Hong Kong Institute for Clean Energy City University of Hong Kong Kowloon 999077 Hong Kong Hong Kong
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14
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Gao W, Qi F, Peng Z, Lin FR, Jiang K, Zhong C, Kaminsky W, Guan Z, Lee CS, Marks TJ, Ade H, Jen AKY. Achieving 19% Power Conversion Efficiency in Planar-Mixed Heterojunction Organic Solar Cells Using a Pseudosymmetric Electron Acceptor. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2202089. [PMID: 35724397 DOI: 10.1002/adma.202202089] [Citation(s) in RCA: 87] [Impact Index Per Article: 43.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2022] [Revised: 06/04/2022] [Indexed: 06/15/2023]
Abstract
A record power conversion efficiency (PCE) of over 19% is realized in planar-mixed heterojunction (PMHJ) organic solar cells (OSCs) by adopting the asymmetric selenium substitution strategy in making a pseudosymmetric electron acceptor, BS3TSe-4F. The combined molecular asymmetry with more polarizable selenium substitution increases the dielectric constant of the D18/BS3TSe-4F blend, helping lower the exciton binding energy. On the other hand, dimer packing in BS3TSe-4F is facilitated to enable free charge generation, helping more efficient exciton dissociation and lowering the radiative recombination loss (ΔE2 ) of OSCs. As a result, PMHJ OSCs based on D18/BS3TSe-4F achieve a PCE of 18.48%. By incorporating another mid-bandgap acceptor Y6-O into D18/BS3TSe-4F to form a ternary PMHJ, a higher open-circuit voltage (VOC ) can be achieved to realize an impressive PCE of 19.03%. The findings of using pseudosymmetric electron acceptors in enhancing device efficiency provides an effective way to develop highly efficient acceptor materials for OSCs.
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Affiliation(s)
- Wei Gao
- Department of Materials Science and Engineering, City University of Hong Kong, Kowloon, 999077, Hong Kong
- Hong Kong Institute for Clean Energy, City University of Hong Kong, Kowloon, 999077, Hong Kong
| | - Feng Qi
- Hong Kong Institute for Clean Energy, City University of Hong Kong, Kowloon, 999077, Hong Kong
- Department of Chemistry, City University of Hong Kong, Kowloon, 999077, Hong Kong
| | - Zhengxing Peng
- Department of Physics and Organic and Carbon Electronics Laboratories (ORaCEL), North Carolina State University, Raleigh, NC, 27695, USA
| | - Francis R Lin
- Hong Kong Institute for Clean Energy, City University of Hong Kong, Kowloon, 999077, Hong Kong
- Department of Chemistry, City University of Hong Kong, Kowloon, 999077, Hong Kong
| | - Kui Jiang
- Department of Materials Science and Engineering, City University of Hong Kong, Kowloon, 999077, Hong Kong
- Hong Kong Institute for Clean Energy, City University of Hong Kong, Kowloon, 999077, Hong Kong
| | - Cheng Zhong
- Department of Chemistry, Hubei Key Lab on Organic and Polymeric Optoelectronic Materials, Wuhan University, Wuhan, 430072, China
| | - Werner Kaminsky
- Department of Chemistry, University of Washington, Seattle, WA, 98195-2120, USA
| | - Zhiqiang Guan
- Department of Chemistry, City University of Hong Kong, Kowloon, 999077, Hong Kong
| | - Chun-Sing Lee
- Hong Kong Institute for Clean Energy, City University of Hong Kong, Kowloon, 999077, Hong Kong
- Department of Chemistry, City University of Hong Kong, Kowloon, 999077, Hong Kong
| | - Tobin J Marks
- Department of Chemistry and the Materials Research Center, Northwestern University, Evanston, IL, 60208, USA
| | - Harald Ade
- Department of Physics and Organic and Carbon Electronics Laboratories (ORaCEL), North Carolina State University, Raleigh, NC, 27695, USA
| | - Alex K-Y Jen
- Department of Materials Science and Engineering, City University of Hong Kong, Kowloon, 999077, Hong Kong
- Hong Kong Institute for Clean Energy, City University of Hong Kong, Kowloon, 999077, Hong Kong
- Department of Chemistry, City University of Hong Kong, Kowloon, 999077, Hong Kong
- Department of Materials Science and Engineering, University of Washington, Seattle, WA, 98195-2120, USA
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15
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Han D, Lim C, Phan TNL, Kim Y, Kim BJ. Benzotriazole-Based Non-Fused Ring Acceptors for Efficient and Thermally Stable Organic Solar Cells. Macromol Rapid Commun 2022; 43:e2200530. [PMID: 35866445 DOI: 10.1002/marc.202200530] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2022] [Revised: 07/05/2022] [Indexed: 11/11/2022]
Abstract
Non-fused ring acceptors (NFRAs) have attracted significant attention for non-fullerene organic solar cells (OSCs) owing to their chemical tunability and facile synthesis. In this study, a benzotriazole-based NFRA with chlorinated end groups (Triazole-4Cl) is developed to realize highly efficient and thermally stable NFRA-based OSCs; an analogous NFRA with non-chlorinated end groups (Triazole-H) is synthesized for comparison. Triazole-4Cl film exhibits the high-order packing structure and the near-infrared absorption capability, which are advantageous in charge transport and light harvesting of the resulting OSCs. In particular, the strong crystalline behavior of Triazole-4Cl results in enhanced self-aggregation, leading to high charge carrier mobility. Owing to these properties, a PBDB-T(polymer donor):Triazole-4Cl OSC demonstrates a high short-circuit current, fill factor, and power conversion efficiency (PCE = 10.46%), outperforming a PBDB-T:Triazole-H OSC (PCE = 7.65%). In addition, the thermal stability of a PBDB-T:Triazole-4Cl OSC at an elevated temperature of 120°C exceeds that of a PBDB-T:Triazole-H OSC. This is mainly attributed to the significantly higher cold crystallization temperature of Triazole-4Cl (205.9°C). This work provides useful guidelines for the design of NFRAs to achieve efficient and thermally stable NFRA-based OSCs. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Daehee Han
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
| | - Chulhee Lim
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
| | - Tan Ngoc-Lan Phan
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
| | - Youngkwon Kim
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
| | - Bumjoon J Kim
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
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16
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Zhang Y, Wei Q, He Z, Wang Y, Shan T, Fu Y, Guo X, Zhong H. Efficient Optoelectronic Devices Enabled by Near-Infrared Organic Semiconductors with a Photoresponse beyond 1050 nm. ACS APPLIED MATERIALS & INTERFACES 2022; 14:31066-31074. [PMID: 35762628 DOI: 10.1021/acsami.2c06277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Organic optoelectronic devices exhibit distinctive photoresponse to the near-infrared (NIR) light and show great potential in many fields. However, the optoelectronic properties of the existing devices hardly meet the technical requirements of new applications such as energy conversion and health sensing, thus raising the demand to develop high-performance NIR organic semiconductors. To address this issue, a new NIR material, namely, BFIC, is designed and synthesized by inserting fluorothieno[3,4-b]thiophene (FTT) as a π-bridge. Since the introduction of FTT can extend the conjugation, stabilize the quinoid resonant structure, and enhance the intramolecular charge transfer, BFIC displays a broad and intense absorption in the NIR region, ranging from 700 to 1050 nm. As a result, the organic solar cell based on BFIC and a polymer donor PTB7-Th realizes a power conversion efficiency of 10.38%. The semitransparent organic solar cell (OSC) shows a power conversion efficiency of 6.15%, accompanied by an average visible transmittance of 38.79% due to the selective photoresponse in the NIR range. The organic photodetector based on PTB7-Th:BFIC delivers a broad spectral response ranging from 330 to 1030 nm with a specific detectivity over 1013 Jones under the self-powered mode, which is one of the highest detectivities among the broad-band organic photodetectors.
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Affiliation(s)
- Yi Zhang
- School of Chemistry and Chemical Engineering, Shanghai Key Lab of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai 200240, China
- State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
| | - Qingyun Wei
- School of Chemistry and Chemical Engineering, Shanghai Key Lab of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Zhilong He
- School of Chemistry and Chemical Engineering, Shanghai Key Lab of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yan Wang
- School of Chemistry and Chemical Engineering, Shanghai Key Lab of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Tong Shan
- School of Chemistry and Chemical Engineering, Shanghai Key Lab of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai 200240, China
- School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yanyan Fu
- State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
| | - Xiaojun Guo
- School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Hongliang Zhong
- School of Chemistry and Chemical Engineering, Shanghai Key Lab of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai 200240, China
- State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
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17
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Ge J, Hong L, Ma H, Ye Q, Chen Y, Xie L, Song W, Li D, Chen Z, Yu K, Zhang J, Wei Z, Huang F, Ge Z. Asymmetric Substitution of End-Groups Triggers 16.34% Efficiency for All-Small-Molecule Organic Solar Cells. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2202752. [PMID: 35603901 DOI: 10.1002/adma.202202752] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 04/27/2022] [Indexed: 06/15/2023]
Abstract
Asymmetric substitution of end-groups is first applied in molecular donors. Three commonly used end-groups of 2-ethylhexyl cyanoacetate (CA), 2-ethylhexyl rhodanine (Reh), and 1H-indene-1,3(2H)-dione (ID) are combined to construct a series of symmetric and asymmetric donors. Correspondingly, the asymmetric donors SM-CA-Reh and SM-CA-ID show largely increased dipole moments (2.14 and 3.39 D, respectively) and enhanced aggregation propensity, as compared to those of symmetric donors of SM-CA, SM-Reh, and SM-ID. Using N3 as acceptor, interestingly, SM-CA-Reh integrates the photovoltaic characteristics of high fill factor (FF) for SM-CA and high short-circuit current density for SM-Reh, and delivers a record power conversion efficiency (PCE) of 16.34% with a high FF of 77.5%, which is much higher than 15.41% for SM-CA and 14.76% for SM-Reh. However, SM-CA-ID and SM-ID give the lower PCE of 8.20% and 2.76%. Characterization results suggest that the π-π interaction mainly dictates the packing morphology of blend films instead of dipole effect or crystallinity. Mono-substitution of Reh facilitates the molecular demixing appropriately but keeps the characteristic of the fine bicontinuous network of SM-CA:N3. SM-CA-Reh:N3 shows more efficient exciton extraction, higher hole transport, and better miscibility. These results well explain the merits integration and improved photovoltaic performance.
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Affiliation(s)
- Jinfeng Ge
- Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences, Ningbo, 315201, P. R. China
- Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Ling Hong
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640, P. R. China
| | - Houying Ma
- Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences, Ningbo, 315201, P. R. China
| | - Qinrui Ye
- Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences, Ningbo, 315201, P. R. China
- Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Yanwei Chen
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640, P. R. China
| | - Lin Xie
- Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences, Ningbo, 315201, P. R. China
| | - Wei Song
- Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences, Ningbo, 315201, P. R. China
- Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Dandan Li
- Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences, Ningbo, 315201, P. R. China
- Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Zhenyu Chen
- Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences, Ningbo, 315201, P. R. China
- Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Kuibao Yu
- Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences, Ningbo, 315201, P. R. China
| | - Jianqi Zhang
- Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology, Beijing, 100190, China
| | - Zhixiang Wei
- Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology, Beijing, 100190, China
| | - Fei Huang
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640, P. R. China
| | - Ziyi Ge
- Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences, Ningbo, 315201, P. R. China
- Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
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18
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Gao W, Jiang M, Wu Z, Fan B, Jiang W, Cai N, Xie H, Lin FR, Luo J, An Q, Woo HY, Jen AKY. Intramolecular Choloro‐Sulfur Interaction and Asymmetric Side‐Chain Isomerization to Balance Crystallinity and Miscibility in All‐Small‐Molecule Solar Cells. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202205168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Wei Gao
- City University of Hong Kong Department of Chemistry 83 Tat Chee Avenue, Kowloon Tong, Hong Kong 999077 Hong Kong CHINA
| | - Mengyun Jiang
- Beijing Institute of Technology School of Chemistry and Chemical Engineering 100081 Beijing CHINA
| | - Ziang Wu
- Korea University Department of Chemistry 136-713 Seoul KOREA, REPUBLIC OF
| | - Baobing Fan
- City University of Hong Kong Department of Materials Science and Engineering 999077 Hong Kong CHINA
| | - Wenlin Jiang
- City University of Hong Kong Department of Materials Science and Engineering 999077 Hong Kong CHINA
| | - Ning Cai
- Guangdong University of Technology School of Chemical Engineering and Light Industry 510006 Guangzhou CHINA
| | - Hua Xie
- Wuhan University School of Water Resources and Hydropower 430072 Wuhan CHINA
| | - Francis R. Lin
- City University of Hong Kong Department of Chemistry 999077 Hong Kong CHINA
| | - Jingdong Luo
- City University of Hong Kong Department of Chemistry 999077 Hong Kong CHINA
| | - Qiaoshi An
- Beijing Institute of Technology School of Chemistry and Chemical Engineering 100081 Beijing CHINA
| | - Han Young Woo
- Korea University Department of Chemistry Seoul KOREA, REPUBLIC OF
| | - Alex K.-Y. Jen
- City University of Hong Kong Chemistry Tat Chee Ave 999077 Kowloon CHINA
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19
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Liu Y, Lin Z, Cao J, Du F, Wang H, He S, Tang W. Unfused Acceptors Matching π-Bridge Blocks with Proper Frameworks Enable Over 12% As-Cast Organic Solar Cells. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2201209. [PMID: 35607794 DOI: 10.1002/smll.202201209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 05/04/2022] [Indexed: 06/15/2023]
Abstract
Emerging unfused-ring acceptors (UFAs) have been explored in pursuit of low-cost high-efficient organic solar cells (OSCs). Assembling unfused building blocks into proper frameworks are challenging for the molecular design of UFAs. The authors report herein four UFAs adopting either dithiophene cyclopentadiene (DTC) or dithieno[3,2-b:2',3'-d]pyrrole (DTP) as π-bridge units with different molecular frameworks for high-efficient as-cast OSCs. All these acceptors exhibit strong near-infrared absorption and narrow optical band gap (Eg opt < 1.50 eV). DTC-bridged symmetric and DTP-bridged asymmetric UFAs exhibit higher planar conformation as well as suitable miscibility and homogeneous phase separation when blending with polymer donor PBDB-T to promote efficient charge transport in the blends. Their blends with PBDB-T contribute optimal PCE of 12.17% and 11.92% in as-cast OSCs, among the highest values for UFAs based as-cast devices in the literature. Experimental and theoretical simulations systematically reveal the impact of manipulating the molecular framework of UFAs on their conformation, optoelectronic, and photovoltaic performance. The results indicate the matching π-bridge units with molecular frameworks as an attractive approach to design UFAs for high-performance as-cast OSCs.
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Affiliation(s)
- Yue Liu
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, P. R. China
- Institute of Flexible Electronics (IFE, Future Technologies), Xiamen University, Xiamen, 361005, P. R. China
| | - Zhijie Lin
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, P. R. China
- Institute of Flexible Electronics (IFE, Future Technologies), Xiamen University, Xiamen, 361005, P. R. China
| | - Jinru Cao
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, P. R. China
| | - Fuqiang Du
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, P. R. China
| | - Hongtao Wang
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, P. R. China
| | - Shi He
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, P. R. China
| | - Weihua Tang
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, P. R. China
- Institute of Flexible Electronics (IFE, Future Technologies), Xiamen University, Xiamen, 361005, P. R. China
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20
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Lowing the energy loss of organic solar cells by molecular packing engineering via multiple molecular conjugation extension. Sci China Chem 2022. [DOI: 10.1007/s11426-022-1264-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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21
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Yan B, Wang X, Hu C, Wu D, Xia J. Asymmetrical and symmetrical naphthalene monoimide fused perylene diimide acceptors for organic solar cells. Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.132818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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22
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Qi F, Jones LO, Jiang K, Jang SH, Kaminsky W, Oh J, Zhang H, Cai Z, Yang C, Kohlstedt KL, Schatz GC, Lin FR, Marks TJ, Jen AKY. Regiospecific N-alkyl substitution tunes the molecular packing of high-performance non-fullerene acceptors. MATERIALS HORIZONS 2022; 9:403-410. [PMID: 34666341 DOI: 10.1039/d1mh01127h] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The rapid development of non-fullerene acceptors (NFAs) with strong near-infrared absorption has led to remarkably enhanced short-circuit current density (Jsc) values in organic solar cells (OSCs). NFAs based on the benzotriazole (Bz) fused-ring π-core have great potential in delivering both high Jsc and decent open-circuit voltage values due to their strong intramolecular charge transfer with reasonably low energy loss. In this work, we have designed and synthesized a series of Bz-based NFAs, PN6SBO-4F, AN6SBO-4F and EHN6SEH-4F, via regiospecific N-alkyl engineering based on the high-performance NFA mBzS-4F that was reported previously. The molecular packing of mBzS-4F, AN6SBO-4F, and EHN6SEH-4F single crystals was analyzed using X-ray crystallography in order to provide a comprehensive understanding of the correlation between the molecular structure, the charge-transporting properties, and the solar cell performance. Compared with the typical honeycomb single-crystal structure of Y6 derivatives, these NFAs exhibit distinctly different molecular packing patterns. The strong interactions of terminal indanone groups in mBzS-4F and the J-aggregate-like packing in EHN6SEH-4F lead to the formation of ordered 3D networks in single-crystals with channels for efficient charge transport. Consequently, OSCs based on mBzS-4F and EHN6SEH-4F show efficient photon-to-current conversions, achieving the highest power conversion efficiency of 17.48% with a Jsc of 28.83 mA cm-2.
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Affiliation(s)
- Feng Qi
- Department of Chemistry, City University of Hong Kong, Kowloon, 999077, Hong Kong.
| | - Leighton O Jones
- Department of Chemistry and the Materials Research Center (MRC), Northwestern University, Evanston, Illinois 60208, USA.
| | - Kui Jiang
- Department of Materials Science and Engineering, City University of Hong Kong, Kowloon, 999077, Hong Kong
| | - Sei-Hum Jang
- Department of Materials Science and Engineering, University of Washington, Seattle, Washington 98195-2120, USA
| | - Werner Kaminsky
- Department of Chemistry, University of Washington, Seattle, Washington 98195-2120, USA
| | - Jiyeon Oh
- Department of Energy Engineering, School of Energy and Chemical Engineering, Perovtronics Research Center, Low Dimensional Carbon Materials Center, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulju-gun, Ulsan 44919, South Korea
| | - Hongna Zhang
- State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University, Kowloon, 999077, Hong Kong
| | - Zongwei Cai
- State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University, Kowloon, 999077, Hong Kong
| | - Changduk Yang
- Department of Energy Engineering, School of Energy and Chemical Engineering, Perovtronics Research Center, Low Dimensional Carbon Materials Center, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulju-gun, Ulsan 44919, South Korea
| | - Kevin L Kohlstedt
- Department of Chemistry and the Materials Research Center (MRC), Northwestern University, Evanston, Illinois 60208, USA.
| | - George C Schatz
- Department of Chemistry and the Materials Research Center (MRC), Northwestern University, Evanston, Illinois 60208, USA.
| | - Francis R Lin
- Department of Chemistry, City University of Hong Kong, Kowloon, 999077, Hong Kong.
| | - Tobin J Marks
- Department of Chemistry and the Materials Research Center (MRC), Northwestern University, Evanston, Illinois 60208, USA.
| | - Alex K-Y Jen
- Department of Chemistry, City University of Hong Kong, Kowloon, 999077, Hong Kong.
- Department of Materials Science and Engineering, City University of Hong Kong, Kowloon, 999077, Hong Kong
- Department of Materials Science and Engineering, University of Washington, Seattle, Washington 98195-2120, USA
- Department of Chemistry, University of Washington, Seattle, Washington 98195-2120, USA
- Hong Kong Institute for Clean Energy, City University of Hong Kong, Kowloon, 999077, Hong Kong
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Wang M, Wang B, Song W, Wang X, Peng X, Long X, Xia Y. Oxygen Reduction Activity of B←N-Containing Organic Molecule Affected by Asymmetric Regulation. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2105524. [PMID: 34837332 DOI: 10.1002/smll.202105524] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 10/13/2021] [Indexed: 06/13/2023]
Abstract
Organic molecular catalysts have received great attention as they have the merits of well-controlled molecular structures for the development of catalytic chemistry. Herein, the electronic distribution of active sites is regulated by asymmetrically introducing S-heterocycle on one side of the molecular core. As a result, the asymmetric as-PYT and as-BNT show higher oxygen reduction performance than their symmetric counterparts without (s-PY, s-PY2T) or with two S-heterocycle units (s-BN, s-BN2T). Density functional theory calculations reveal that the carbon atoms (site-12) at symmetric s-BN and s-BN2T are the catalytic active sites, while for asymmetric as-BNT, it has changed to amino-N atom (site-14). Due to the non-uniform charge distribution and increased dipole moment of as-BNT caused by asymmetric molecular configuration, the kinetics of catalytic reaction has changed significantly. The catalytically active sites of specific N atoms are further verified experimentally and theoretically by using sterically hindered phenyl groups. This work provides a simple but efficient method to design metal-free oxygen reduction electrocatalysts.
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Affiliation(s)
- Meilong Wang
- State Key Laboratory of Bio-Fibers and Eco-Textiles, Collaborative Innovation Center of Shandong Marine Biobased Fibers and Ecological Textiles, Institute of Marine Biobased Materials, College of Materials Science and Engineering, Qingdao University, Qingdao, 266071, P. R. China
| | - Bingbing Wang
- State Key Laboratory of Bio-Fibers and Eco-Textiles, Collaborative Innovation Center of Shandong Marine Biobased Fibers and Ecological Textiles, Institute of Marine Biobased Materials, College of Materials Science and Engineering, Qingdao University, Qingdao, 266071, P. R. China
| | - Weichen Song
- State Key Laboratory of Bio-Fibers and Eco-Textiles, Collaborative Innovation Center of Shandong Marine Biobased Fibers and Ecological Textiles, Institute of Marine Biobased Materials, College of Materials Science and Engineering, Qingdao University, Qingdao, 266071, P. R. China
| | - Xuchao Wang
- Department of Environmental and Chemical Engineering, Tangshan University, Tangshan, 063000, P. R. China
| | - Xudong Peng
- Department of Ophthalmology, University of Washington, 325 Ninth Ave, Box 359607, Seattle, WA, 98104, USA
| | - Xiaojing Long
- State Key Laboratory of Bio-Fibers and Eco-Textiles, Collaborative Innovation Center of Shandong Marine Biobased Fibers and Ecological Textiles, Institute of Marine Biobased Materials, College of Materials Science and Engineering, Qingdao University, Qingdao, 266071, P. R. China
| | - Yanzhi Xia
- State Key Laboratory of Bio-Fibers and Eco-Textiles, Collaborative Innovation Center of Shandong Marine Biobased Fibers and Ecological Textiles, Institute of Marine Biobased Materials, College of Materials Science and Engineering, Qingdao University, Qingdao, 266071, P. R. China
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24
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Hsieh CM, Chuang MR, Yamada Y, Su CJ, Chang YJ, Murata M, Jeng US, Chuang SC. p-Tetrafluorophenylene Divinylene-Bridged Nonfullerene Acceptors as Binary Components or Additives for High-Efficiency Organic Solar Cells. ACS APPLIED MATERIALS & INTERFACES 2021; 13:61473-61486. [PMID: 34918898 DOI: 10.1021/acsami.1c19943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
In this study, we designed, synthesized, and characterized an A-D-A'-D-A-type indacenodithienothiophene (IDTT)-based molecular acceptor that exhibited a broader absorption range and higher lowest unoccupied molecular orbital energy level with a nearly comparable band gap compared to a well-known electron acceptor IT-M. The designed electron-deficient molecular acceptor FB-2IDTT-4Cl with a fluorinated benzene tether (FB), that is, p-tetrafluorophenylene divinylene, demonstrated long-wavelength absorption and high hole and electron charge mobility in the thin films blended with the electron donor PBDB-T for an inverted organic photovoltaic (OPV) binary device, resulting in a maximum power conversion efficiency (PCE) of 11.4%. Such a performance is comparably as high as that of the device with PBDB-T:IT-M, and particularly, it was 18.8% higher than that of the devices with ITIC-4Cl as the acceptor (PCE 9.1% ± 0.5%) and 24.9% higher than that of the devices with the thiophene-flanked benzothiadiazole-bridged acceptor CNDTBT-IDTT-FINCN (PCE 9.01% ± 0.13%). Furthermore, varying the illumination intensity from 200 to 2000 lux increased the Jsc and Voc values as well as the FF values, thus leading to increased PCE levels. In addition, the best PCE of the PM6:Y6 device with 1% FB-2IDTT-4Cl as additives was 16.9%. Our stability test showed that the PM6:Y6 standard device efficiency downgraded very soon either at room temperature or under thermal-annealing conditions. However, with the addition of 1% FB-2IDTT-4Cl as additives, the device efficiency still can be maintained at 90-95% in 500 h at room temperature and 95% at 20 h and 85-95% in 45 h at an annealing temperature of 80 °C. These findings demonstrate FB-2IDTT-4Cl to be a promising candidate as an electron acceptor with a fluorinated π-bridging fused-ring design for OPV applications.
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Affiliation(s)
- Cheng-Ming Hsieh
- Department of Applied Chemistry, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu 30010, Taiwan
| | - Min-Ru Chuang
- Department of Applied Chemistry, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu 30010, Taiwan
| | - Yuto Yamada
- Department of Applied Chemistry, Osaka Institute of Technology, Osaka 535-8585, Japan
| | - Chun-Jen Su
- National Synchrotron Radiation Research Center, Hsinchu Science Park, Hsinchu 30076, Taiwan
| | - Yuan Jay Chang
- Department of Chemistry, Tunghai University, Taichung City 40704, Taiwan
| | - Michihisa Murata
- Department of Applied Chemistry, Osaka Institute of Technology, Osaka 535-8585, Japan
| | - U-Ser Jeng
- National Synchrotron Radiation Research Center, Hsinchu Science Park, Hsinchu 30076, Taiwan
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Shih-Ching Chuang
- Department of Applied Chemistry, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu 30010, Taiwan
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26
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Schweda B, Reinfelds M, Hofstadler P, Trimmel G, Rath T. Recent Progress in the Design of Fused-Ring Non-Fullerene Acceptors-Relations between Molecular Structure and Optical, Electronic, and Photovoltaic Properties. ACS APPLIED ENERGY MATERIALS 2021; 4:11899-11981. [PMID: 35856015 PMCID: PMC9286321 DOI: 10.1021/acsaem.1c01737] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Organic solar cells are on the dawn of the next era. The change of focus toward non-fullerene acceptors has introduced an enormous amount of organic n-type materials and has drastically increased the power conversion efficiencies of organic photovoltaics, now exceeding 18%, a value that was believed to be unreachable some years ago. In this Review, we summarize the recent progress in the design of ladder-type fused-ring non-fullerene acceptors in the years 2018-2020. We thereby concentrate on single layer heterojunction solar cells and omit tandem architectures as well as ternary solar cells. By analyzing more than 700 structures, we highlight the basic design principles and their influence on the optical and electrical structure of the acceptor molecules and review their photovoltaic performance obtained so far. This Review should give an extensive overview of the plenitude of acceptor motifs but will also help to understand which structures and strategies are beneficial for designing materials for highly efficient non-fullerene organic solar cells.
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Affiliation(s)
- Bettina Schweda
- Institute for Chemistry and
Technology of Materials, NAWI Graz, Graz
University of Technology, Stremayrgasse 9, 8010Graz, Austria
| | - Matiss Reinfelds
- Institute for Chemistry and
Technology of Materials, NAWI Graz, Graz
University of Technology, Stremayrgasse 9, 8010Graz, Austria
| | - Petra Hofstadler
- Institute for Chemistry and
Technology of Materials, NAWI Graz, Graz
University of Technology, Stremayrgasse 9, 8010Graz, Austria
| | - Gregor Trimmel
- Institute for Chemistry and
Technology of Materials, NAWI Graz, Graz
University of Technology, Stremayrgasse 9, 8010Graz, Austria
| | - Thomas Rath
- Institute for Chemistry and
Technology of Materials, NAWI Graz, Graz
University of Technology, Stremayrgasse 9, 8010Graz, Austria
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27
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Facile and Convergent Synthesis of Highly Fused Oligosiloles by Rhodium‐Catalyzed Stitching Reaction. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100780] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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28
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Chen H, Zhao T, Li L, Tan P, Lai H, Zhu Y, Lai X, Han L, Zheng N, Guo L, He F. 17.6%-Efficient Quasiplanar Heterojunction Organic Solar Cells from a Chlorinated 3D Network Acceptor. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2102778. [PMID: 34318541 DOI: 10.1002/adma.202102778] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 06/29/2021] [Indexed: 06/13/2023]
Abstract
Bulk heterojunction (BHJ) organic solar cells (OSCs) have achieved great success because they overcome the shortcomings of short exciton diffusion distances. With the progress in material innovation and device technology, the efficiency of BHJ devices is continually being improved. For some special photovoltaic material systems, it is difficult to manipulate the miscibility and morphology of blend films, and this results in moderate, even poor device performance. Quasiplanar heterojunction (Q-PHJ) OSCs have been proposed to exploit the excellent photovoltaic properties of these materials. An OSC with BTIC-BO-4Cl has a 3D interpenetrating network structure with multiple channels that can facilitate the exciton diffusion and charge transport, and BTIC-BO-4Cl is therefore a good candidate for Q-PHJ OSCs. In this work, a D18:BTIC-BO-4Cl-based Q-PHJ device is fabricated. The exciton diffusion lengths of D18 and BTIC-BO-4Cl are in accord with the requirements of the Q-PHJ device and the efficiency of Q-PHJ device is as high as 17.60%. This study indicates that the Q-PHJ architecture can replace the BHJ architecture to produce excellent OSCs for certain unique donors and acceptors, providing an alternative approach to photovoltaic material design and device fabrication.
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Affiliation(s)
- Hui Chen
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, China
- Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Tingxing Zhao
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Long Li
- Department of Mechanical and Energy Engineering, Key Laboratory of Energy Conversion and Storage Technologies, Ministry of Education, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Pu Tan
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Hanjian Lai
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Yulin Zhu
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Xue Lai
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Liang Han
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Nan Zheng
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640, China
| | - Liang Guo
- Department of Mechanical and Energy Engineering, Key Laboratory of Energy Conversion and Storage Technologies, Ministry of Education, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Feng He
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, China
- Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen, 518055, China
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Lin J, Guo Q, Liu Q, Lv J, Liang H, Wang Y, Zhu L, Liu F, Guo X, Zhang M. A Noncovalently
Fused‐Ring
Asymmetric Electron Acceptor Enables Efficient Organic Solar Cells. CHINESE J CHEM 2021. [DOI: 10.1002/cjoc.202100323] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ji Lin
- Laboratory of Advanced Optoelectronic Materials, College of Chemistry, Chemical Engineering and Materials Science Soochow University Suzhou Jiangsu 215123 China
| | - Qing Guo
- Laboratory of Advanced Optoelectronic Materials, College of Chemistry, Chemical Engineering and Materials Science Soochow University Suzhou Jiangsu 215123 China
- Henan Institute of Advanced Technology Zhengzhou University Zhengzhou Henan 450003 China
| | - Qi Liu
- Laboratory of Advanced Optoelectronic Materials, College of Chemistry, Chemical Engineering and Materials Science Soochow University Suzhou Jiangsu 215123 China
| | - Junfang Lv
- Laboratory of Advanced Optoelectronic Materials, College of Chemistry, Chemical Engineering and Materials Science Soochow University Suzhou Jiangsu 215123 China
| | - Haiyan Liang
- Laboratory of Advanced Optoelectronic Materials, College of Chemistry, Chemical Engineering and Materials Science Soochow University Suzhou Jiangsu 215123 China
| | - Yang Wang
- Laboratory of Advanced Optoelectronic Materials, College of Chemistry, Chemical Engineering and Materials Science Soochow University Suzhou Jiangsu 215123 China
| | - Lei Zhu
- Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering Shanghai Jiao Tong University Shanghai 200240 China
| | - Feng Liu
- Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering Shanghai Jiao Tong University Shanghai 200240 China
| | - Xia Guo
- Laboratory of Advanced Optoelectronic Materials, College of Chemistry, Chemical Engineering and Materials Science Soochow University Suzhou Jiangsu 215123 China
| | - Maojie Zhang
- Laboratory of Advanced Optoelectronic Materials, College of Chemistry, Chemical Engineering and Materials Science Soochow University Suzhou Jiangsu 215123 China
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30
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Synthesis, photophysical properties, and computational studies of benzothiadiazole and/or phenothiazine based donor/acceptor π-conjugated copolymers. JOURNAL OF POLYMER RESEARCH 2021. [DOI: 10.1007/s10965-021-02621-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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31
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Xia Z, Zhang J, Gao X, Song W, Ge J, Xie L, Zhang X, Liu Z, Ge Z. Fine-Tuning the Dipole Moment of Asymmetric Non-Fullerene Acceptors Enabling Efficient and Stable Organic Solar Cells. ACS APPLIED MATERIALS & INTERFACES 2021; 13:23983-23992. [PMID: 33998796 DOI: 10.1021/acsami.1c02652] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Modifying molecular conjugation has been demonstrated as an effective strategy to enhance the photovoltaic performance of the non-fullerene small molecule acceptors (SMAs), which would regulate the molecular packing and nanoscale morphology in the active layer of organic solar cells (OSCs). Here, two novel SMAs PTIC-4Cl and PT2IC-4Cl are designed and synthesized by expanding the core unit of TB-4Cl in one or two directions. The effects of how to expand the conjugation length on the absorption property, energy levels, dipole moment, and solubility are studied via theoretical calculation and experiments. Compared to PT2IC-4Cl, PTIC-4Cl with a more asymmetric structure exhibits the larger dipole moment and enhanced intermolecular packing. The PTIC-4Cl-based OSCs exhibit a favorable morphology and balanced charge transport, thereby leading to the highest power conversion efficiencies. In addition, PTIC-4Cl-based devices show outstanding thermal and air stability. These results reveal that fine-tuning the dipole moment via rationally expanding the conjugation in asymmetric A-D1A'D2-A-type non-fullerene acceptors is critical to achieve high-performance OSCs.
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Affiliation(s)
- Zihao Xia
- Hubei Engineering Technology Research Center of Optoelectronic and New Energy Materials, School of Materials Science & Engineering, Wuhan Institute of Technology, Wuhan 430205, P. R. China
| | - Jinsheng Zhang
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, P. R. China
| | - Xiang Gao
- Hubei Engineering Technology Research Center of Optoelectronic and New Energy Materials, School of Materials Science & Engineering, Wuhan Institute of Technology, Wuhan 430205, P. R. China
| | - Wei Song
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, P. R. China
| | - Jinfeng Ge
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, P. R. China
| | - Lin Xie
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, P. R. China
| | - Xiaoli Zhang
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, P.R. China
| | - Zhitian Liu
- Hubei Engineering Technology Research Center of Optoelectronic and New Energy Materials, School of Materials Science & Engineering, Wuhan Institute of Technology, Wuhan 430205, P. R. China
| | - Ziyi Ge
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, P. R. China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
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Xie L, Zhang J, Song W, Hong L, Ge J, Wen P, Tang B, Wu T, Zhang X, Li Y, Ge Z. Understanding the Effect of Sequential Deposition Processing for High-Efficient Organic Photovoltaics to Harvest Sunlight and Artificial Light. ACS APPLIED MATERIALS & INTERFACES 2021; 13:20405-20416. [PMID: 33878270 DOI: 10.1021/acsami.1c02137] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
As the market of the Internet of Things (IoT) increases, great attention has been paid to the development of high-efficient organic photovoltaics (OPVs) utilizing artificial light. However, in a real indoor condition, the power density contribution of the artificial light cannot exceed 35% in the combination of indoor and outdoor irradiation, which indicates that the illumination of sunlight cannot be ignored during daytime. Hence, it is urgent to develop high-efficient OPVs in indoor conditions taking into account both sunlight and artificial light. In this work, a novel asymmetric molecule TB-4F was synthesized to trade-off the absorption spectrum that can be applied under both artificial light and sunlight. In conventional bulk-heterojunction (C-BHJ), it was figured out that due to nonoptimal morphology some carriers failed to be efficiently collected. Herein, a sequential deposition bulk-heterojunction (SD-BHJ) as an alternative fabrication method successfully enhanced the performance of OPVs, under both artificial light and sunlight, which was attributed to the favorable microstructure being vertically distributed in the active layer. Notably, the PCE was significantly increased by 25% for SD-BHJ compared to C-BHJ under artificial light, owing to the strong effect of trap-assisted recombination and dark current on PCE in the condition of low carrier density. Our result indicates that an asymmetric molecule with a blue-shifted spectrum fabricated by SD-BHJ can be a promising candidate that can be applied in indoor environments to harvest sunlight and artificial light simultaneously.
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Affiliation(s)
- Lin Xie
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, P. R. China
| | - Jingshen Zhang
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, P. R. China
| | - Wei Song
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, P. R. China
| | - Ling Hong
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, P. R. China
| | - Jinfeng Ge
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, P. R. China
| | - Pan Wen
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, P. R. China
| | - Bencan Tang
- Department of Chemical and Environmental Engineering, Faculty of Science and Engineering, University of Nottingham Ningbo China, Ningbo 315100, P. R. China
| | - Tao Wu
- Department of Chemical and Environmental Engineering, Faculty of Science and Engineering, University of Nottingham Ningbo China, Ningbo 315100, P. R. China
| | - Xiaoli Zhang
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, P. R. China
| | - Yafeng Li
- Zhejiang Business Technology Institute, Ningbo 315012, P. R. China
| | - Ziyi Ge
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, P. R. China
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33
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Du F, Wang H, Zhang Z, Yang L, Cao J, Yu J, Tang W. An unfused-ring acceptor with high side-chain economy enabling 11.17% as-cast organic solar cells. MATERIALS HORIZONS 2021; 8:1008-1016. [PMID: 34821331 DOI: 10.1039/d0mh01585g] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Side-chain engineering on nonfullerene acceptors (NFAs) is crucial for modulating their solubility and crystallinity as well as packing behaviours in active layers to pursue high-performance organic solar cells (OSCs). High weight ratios of side chains are generally used by NFAs for the desired device efficiencies. Side-chain economy has seldom been discussed despite increased cost and difficulties in synthesis when optimizing the molecular design. Herein, we introduce 7H-dibenzo[c,g]carbazole (DCB) as an electron-donating core to design unfused-ring acceptors (UFAs) with a dramatically low weight ratio of side chains. DCB-4F has thus been designed and compared with the carbazole cored analogue (CB-4F). The unique conformation of the DCB core endows DCB-4F with higher solubility (8.2 mg mL-1 in chloroform) compared to CB-4F (2.2 mg mL-1) when using the same side chains. Featuring a lowest unoccupied molecular orbital (LUMO) level of -3.86 eV and an optical bandgap of 1.55 eV, the DCB-4F film exhibits an absorption profile (maximum 667 nm) complementary to polymer donor PM6. The PM6:DCB-4F as-cast OSCs deliver a power conversion efficiency (PCE) of 9.56% with a high open-circuit voltage (VOC) of 1.00 V. By adding 10 wt% PC71BM into the casting solutions, a greatly improved PCE of 11.17% is readily achieved, which is one of the highest PCEs for as-cast single-junction UFA-based devices. The PM6:DCB-4F based blends show homogeneous nano-fiberous morphology and higher hydrophobicity. The design of conformation-tuned NFAs using sterically hindered DCB-like cores is promising to achieve highly efficient as-cast OSCs.
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Affiliation(s)
- Fuqiang Du
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R. China.
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Li Y, Yu L, Chen L, Han C, Jiang H, Liu Z, Zheng N, Wang J, Sun M, Yang R, Bao X. Subtle Side Chain Triggers Unexpected Two-Channel Charge Transport Property Enabling 80% Fill Factors and Efficient Thick-Film Organic Photovoltaics. Innovation (N Y) 2021; 2:100090. [PMID: 34557744 PMCID: PMC8454635 DOI: 10.1016/j.xinn.2021.100090] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Accepted: 02/01/2021] [Indexed: 11/17/2022] Open
Abstract
To clearly show how important the impact of side chains on organic solar cells (OSCs) is, we designed three acceptors IDIC-CxPh (x = 4, 5, or 6) via subtle side-chain regulation. Despite this small change, significant distinctions were detected. IDIC-C4Ph devices achieve an optimal efficiency of 13.94% under thermal annealing, but thermal-assistant solvent-vapor annealing hugely suppresses the efficiencies to 10%. However, the C6Ph side chain endows extremely disordered stacking orientations, generating moderate efficiencies of ~12.50%. Excitingly, the IDIC-C5Ph affords an unexpected two-channel π-π charge transport (TCCT) property, boosting the fill factor (FF) by up to 80.02% and efficiency to 14.56%, ranking the best among five-ring fused-ladder-type acceptors. Impressively, the special TCCT behavior of IDIC-C5Ph enables 470 nm thick-film OSC with a high FF of up to 70.12% and efficiency of 13.01%, demonstrating the great promise in fabricating large-scale OSCs.
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Affiliation(s)
- Yonghai Li
- CAS Key Laboratory of Bio-based Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
- Functional Laboratory of Solar Energy, Shandong Energy Institute, Qingdao 266101, China
| | - Lu Yu
- CAS Key Laboratory of Bio-based Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
- School of Material Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Liangliang Chen
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Chenyu Han
- CAS Key Laboratory of Bio-based Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
| | - Huanxiang Jiang
- CAS Key Laboratory of Bio-based Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
| | - Zitong Liu
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Nan Zheng
- State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China
| | - Jiuxing Wang
- School of Materials Science and Engineering, Qingdao University, Qingdao 266071, China
| | - Mingliang Sun
- School of Material Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Renqiang Yang
- CAS Key Laboratory of Bio-based Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
- Key Laboratory of Optoelectronic Chemical Materials and Devices (Ministry of Education), School of Chemical and Environmental Engineering, Jianghan University, Wuhan 430056, China
| | - Xichang Bao
- CAS Key Laboratory of Bio-based Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
- Functional Laboratory of Solar Energy, Shandong Energy Institute, Qingdao 266101, China
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Zhuang W, Wang S, Tao Q, Ma W, Berggren M, Fabiano S, Zhu W, Wang E. Synthesis and Electronic Properties of Diketopyrrolopyrrole-Based Polymers with and without Ring-Fusion. Macromolecules 2021; 54:970-980. [PMID: 33603251 PMCID: PMC7880567 DOI: 10.1021/acs.macromol.0c02326] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Revised: 12/25/2020] [Indexed: 01/27/2023]
Abstract
![]()
Diketopyrrolopyrroles
(DPP) have been recognized as a promising
acceptor unit for construction of semiconducting donor–acceptor
(D–A) polymers, which are typically flanked by spacers such
as thiophene rings via a carbon–carbon single
bond formation. It may suffer from a decrease in the coplanarity of
the molecules especially when bulky side chains are installed. In
this work, the two N atoms in the DPP unit are further fused with
C-3 of the two flanking thiophene rings, yielding a π-expanded,
very planar fused-ring building block (DPPFu). A novel DPPFu-based
D–A copolymer (PBDTT-DPPFu) was successfully synthesized, consisting
of a benzo[1,2-b:4,5-b′]dithiophene
(BDTT) unit as a donor and a DPPFu unit as an acceptor. For comparison,
the unfused DPP-based counterpart PBDTT-DPP was also synthesized.
Two dodecyl alkyl chains were attached to thiophene rings of DPP moieties
to ensure good solubility of the DPPFu-based polymer. The influence
of the ring-fusion effect on their structure, photophysical properties,
electronic properties, molecular packing, and charge transport properties
is investigated. Ring-fusion enhances the intermolecular interactions
of PBDTT-DPPFu polymer chains as indicated by density functional theory
calculation and analysis of electrostatic potential and van der Waals
potential and results in significantly improved molecular packing
for both the in-plane and out-of-plane directions as suggested by
X-ray measurements. Finally, we correlate the molecular packing to
the device performance by fabricating field-effect transistors based
on these two polymers. The charge carrier mobility of the ring-fused
polymer PBDTT-DPPFu is significantly higher as compared to the PBDTT-DPP
polymer without ring-fusion, although PBDTT-DPPFu exhibited a much
lower number-average molecular weight of 17 kDa as compared to PBDTT-DPP
with a molecular weight of 108 kDa. The results from our comparative
study provide a robust way to increase the interchain interaction
by ring-fusion-promoted coplanarity.
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Affiliation(s)
- Wenliu Zhuang
- Advanced Research Center for Polymer Processing Engineering of Guangdong Province, Guangdong Industry Polytechnic, Guangzhou 510300, China.,Department of Chemistry and Chemical Engineering, Chalmers University of Technology, SE-41296 Göteborg, Sweden
| | - Suhao Wang
- Laboratory of Organic Electronics, Department of Science and Technology, Linköping University, SE-60174 Norrköping, Sweden
| | - Qiang Tao
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, SE-41296 Göteborg, Sweden.,School of Materials and Chemical Engineering, Hunan Institute of Engineering, Xiangtan 411104, China
| | - Wei Ma
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China
| | - Magnus Berggren
- Laboratory of Organic Electronics, Department of Science and Technology, Linköping University, SE-60174 Norrköping, Sweden
| | - Simone Fabiano
- Laboratory of Organic Electronics, Department of Science and Technology, Linköping University, SE-60174 Norrköping, Sweden
| | - Weiguo Zhu
- School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou 213164, China
| | - Ergang Wang
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, SE-41296 Göteborg, Sweden.,School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
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Song X, Hou L, Guo R, Wei Q, Yang L, Jiang X, Tu S, Zhang A, Kan Z, Tang W, Xing G, Müller-Buschbaum P. Synergistic Interplay between Asymmetric Backbone Conformation, Molecular Aggregation, and Charge-Carrier Dynamics in Fused-Ring Electron Acceptor-Based Bulk Heterojunction Solar Cells. ACS APPLIED MATERIALS & INTERFACES 2021; 13:2961-2970. [PMID: 33412838 DOI: 10.1021/acsami.0c19700] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Asymmetric fused-ring electron acceptors (a-FREAs) have proved to be a promising type of electron acceptor for high-performance organic solar cells (OSCs). However, the relationship among molecular structures of a-FREAs and their nanoscale morphology, charge-carrier dynamics, and device performance remains unclear. In this contribution, two FREAs differing in conjugated backbone geometry with an asymmetric conformation (IPT-2F) or symmetric one (INPIC-2F) are selected to systematically explore the superiorities of the asymmetric conformation. Despite the frailer extinction coefficient and weaker crystallinity, IPT-2F shows stronger dipole interactions in the asymmetrical backbone, which would induce a closer lamellar packing than that of the symmetrical counterpart. Using PBDB-T as the electron donor, the IPT-2F-based OSCs achieve the best power conversion efficiency of 14.0%, which is ca. 67% improvement compared to the INPIC-2F-based ones (8.37%), resulting from a simultaneously increased short-circuited current density (Jsc) and fill factor. Systematical investigations on optoelectronic and morphological properties show that the asymmetric conformation-structured IPT-2F exhibits better miscibility with the polymer donor to induce a favorable blend ordering with small domain sizes and suitable phase separation compared to the INPIC-2F symmetric molecule. This facilitates an efficient charge generation and transport, inhibits charge-carrier recombination, and promotes valid charge extraction in IPT-2F-based devices.
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Affiliation(s)
- Xin Song
- Jiangsu Key Lab of Advanced Food Manufacturing Equipment and Technology, Jiangnan University, 214122 Wuxi, China
| | - Licheng Hou
- Chongqing Institute of Green and Intelligent Technology, Chongqing School, University of Chinese Academy of Sciences (UCAS Chongqing), Chinese Academy of Sciences, 400714 Chongqing, China
| | - Renjun Guo
- Physik-Department, Lehrstuhl für Funktionelle Materialien, Technische Universität München, James-Franck-Str. 1, 85748 Garching, Germany
| | - Qi Wei
- Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Avenida da Universidade, 999078 Taipa, China
| | - Linqiang Yang
- School of Chemical Engineering, Nanjing University of Science and Technology, 210094 Nanjing, China
| | - Xinyu Jiang
- Physik-Department, Lehrstuhl für Funktionelle Materialien, Technische Universität München, James-Franck-Str. 1, 85748 Garching, Germany
| | - Suo Tu
- Physik-Department, Lehrstuhl für Funktionelle Materialien, Technische Universität München, James-Franck-Str. 1, 85748 Garching, Germany
| | - Ao Zhang
- Jiangsu Key Lab of Advanced Food Manufacturing Equipment and Technology, Jiangnan University, 214122 Wuxi, China
| | - Zhipeng Kan
- Chongqing Institute of Green and Intelligent Technology, Chongqing School, University of Chinese Academy of Sciences (UCAS Chongqing), Chinese Academy of Sciences, 400714 Chongqing, China
| | - Weihua Tang
- School of Chemical Engineering, Nanjing University of Science and Technology, 210094 Nanjing, China
| | - Guichuan Xing
- Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Avenida da Universidade, 999078 Taipa, China
| | - Peter Müller-Buschbaum
- Physik-Department, Lehrstuhl für Funktionelle Materialien, Technische Universität München, James-Franck-Str. 1, 85748 Garching, Germany
- Heinz Maier-Leibnitz Zentrum (MLZ), Technische Universität München, Lichtenbergstr. 1, 85748 Garching, Germany
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Khan MU, Hussain R, Mehboob MY, Khalid M, Ehsan MA, Rehman A, Janjua MRSA. First theoretical framework of Z-shaped acceptor materials with fused-chrysene core for high performance organic solar cells. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 245:118938. [PMID: 32971344 DOI: 10.1016/j.saa.2020.118938] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 09/02/2020] [Accepted: 09/07/2020] [Indexed: 05/24/2023]
Abstract
Chrysene core containing fused ring acceptor materials have remarkable efficiency for high performance organic solar cells. Therefore, present study has been carried out with the aim to design chrysene based novel Z-shaped electron acceptor molecules (Z1-Z6) from famous Z-shaped photovoltaic material FCIC (R) for organic photovoltaic applications. End-capped engineering at two electron-accepting end groups 1,1-dicyanomethylene-3-indanone of FCIC is made with highly efficient end-capped acceptor moieties and impact of end-capped modifications on structure-property relationship, photovoltaic and electronic properties of newly designed molecules (Z1-Z6) has been studied in detail through DFT and TDDFT calculations. The efficiencies of the designed molecules are evaluated through energy gaps, exciton binding energy along with transition density matrix (TDM) analysis, reorganizational energy of electron and hole, absorption maxima and open circuit voltage of investigated molecules. The designed molecules exhibit red-shift and intense absorption in near-infrared region (683-749 nm) of UV-Vis-NIR absorption spectrum with narrowing of HOMO-LUMO energy gap from 2.31 eV in R to 1.95 in eV in Z5. Moreover, reduction in reorganization energy of electron from 0.0071 (R) to 0.0049 (Z5), and enhancement in open circuit voltage from 1.08 V in R to 1.20 V in Z5 are also observed. Twisted Z-shape of designed molecules prevents self-aggregation that facilitates miscibility of donor and acceptor. Low values of binding energy, excitation energy, and reorganizational energy (electron and hole) suggest that novel designed molecules offer high charge mobilities as compared to FCIC. Our findings indicate that these novel designed molecules can display better photovoltaic parameters and are suitable candidates if used in organic solar cells.
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Affiliation(s)
- Muhammad Usman Khan
- Department of Chemistry, University of Okara, Okara 56300, Pakistan; Department of Applied Chemistry, Government College University, Faisalabad 38000, Pakistan
| | - Riaz Hussain
- Department of Chemistry, University of Okara, Okara 56300, Pakistan.
| | | | - Muhammad Khalid
- Department of Chemistry, Khwaja Fareed University of Engineering & Information Technology, Rahim Yar Khan 64200, Pakistan
| | - Muhammad Ali Ehsan
- Center of Research Excellence in Nanotechnology (CENT), King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia
| | - Abdul Rehman
- Department of Chemistry, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
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38
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Wang W, Li Y, Zhan C, Xiao S, Tang C, Li G, Lu X, Zhang Q. Bis(thieno[3,2- b]thieno)cyclopentafluorene-Based Acceptor with Efficient and Comparable Photovoltaic Performance under Various Processing Conditions. ACS APPLIED MATERIALS & INTERFACES 2020; 12:49876-49885. [PMID: 33089683 DOI: 10.1021/acsami.0c13109] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
The morphology of a bulk heterojunction (BHJ) blend within a polymer solar cell (PSC) device plays a crucial role in its performance. The ideal morphology is generally achieved through molecular engineering and optimization under film processing conditions. Under different processing conditions, the deviation of the resulted morphology characteristics from the ideal one leads to the dispersion of device performance. For a specific donor/acceptor BHJ blend, it is of great challenge to maintain an efficient and comparable photovoltaic performance under various processing conditions. The solution to this challenge would be of great value in offering more choices for a suitable processing technology in practical applications. Based on the acceptor BTTFIC with the core of bis(thieno[3,2-b]thieno)cyclopentafluorene (BTTF) in our previous work, we chemically modified BTTFIC by fluorination of the end groups of 1,1-dicyanomethylene-3-indanones (IC) and the switching part of octyls in BTTF with 4-hexylphenyls to offer a novel acceptor (BTTFIC4F-Ar). The inverted PBDB-T-2Cl:BTTFIC4F-Ar blend device provided an average power conversion efficiency (PCE) of 10.61, 11.08, and 11.55% when processed under solvent annealing (SA), thermal annealing (TA), and additive treatment with 1,8-diodooctane (DIO), respectively. Different from the reported discrete performance under various processing conditions for a specific donor/acceptor BHJ blend, a low mean absolute performance deviation of 3% was attained. This slight enhancement trend was unexceptionally reflected on charge generation, transportation, and recombination within the blend films from SA, TA, and DIO conditions. A slightly improved ordering of BTTFIC4F-Ar within the DIO blend was observed. Meanwhile, very similar molecular packings as well as a close amorphous domain size of the mixture of PBDB-T-2Cl and BTTFIC4F-Ar within the three blends were observed. These morphological characteristics are in good agreement with the photoelectrical conversion performance of the blends under the three processing conditions. Furthermore, similar attenuation behaviors in performance were also observed. This investigation may provide new guidance on the molecular engineering of nonfullerene acceptors to achieve an efficient BHJ blend with more options for a suitable and cost-effective processing method in practical applications.
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Affiliation(s)
- Wei Wang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, P. R. China
| | - Yuhao Li
- Department of Physics, The Chinese University of Hong Kong, Sha Tin, Hong Kong SAR 999077, P. R. China
| | - Chun Zhan
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, P. R. China
| | - Shengqiang Xiao
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, P. R. China
| | - Chenqing Tang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, P. R. China
| | - Gongchun Li
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, P. R. China
| | - Xinhui Lu
- Department of Physics, The Chinese University of Hong Kong, Sha Tin, Hong Kong SAR 999077, P. R. China
| | - Qichun Zhang
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
- Department of Materials Science and Engineering, City University of Hong Kong, Kowloon, Hong Kong SAR 999077, P. R. China
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Forti G, Nitti A, Osw P, Bianchi G, Po R, Pasini D. Recent Advances in Non-Fullerene Acceptors of the IDIC/ITIC Families for Bulk-Heterojunction Organic Solar Cells. Int J Mol Sci 2020; 21:E8085. [PMID: 33138257 PMCID: PMC7662271 DOI: 10.3390/ijms21218085] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 10/25/2020] [Accepted: 10/28/2020] [Indexed: 11/16/2022] Open
Abstract
The introduction of the IDIC/ITIC families of non-fullerene acceptors has boosted the photovoltaic performances of bulk-heterojunction organic solar cells. The fine tuning of the photophysical, morphological and processability properties with the aim of reaching higher and higher photocurrent efficiencies has prompted uninterrupted worldwide research on these peculiar families of organic compounds. The main strategies for the modification of IDIC/ITIC compounds, described in several contributions published in the past few years, can be summarized and classified into core modification strategies and end-capping group modification strategies. In this review, we analyze the more recent advances in this field (last two years), and we focus our attention on the molecular design proposed to increase photovoltaic performance with the aim of rationalizing the general properties of these families of non-fullerene acceptors.
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Affiliation(s)
- Giacomo Forti
- Department of Chemistry, University of Pavia, Via Taramelli 12, 27100 Pavia, Italy; (G.F.); (A.N.); (P.O.)
| | - Andrea Nitti
- Department of Chemistry, University of Pavia, Via Taramelli 12, 27100 Pavia, Italy; (G.F.); (A.N.); (P.O.)
| | - Peshawa Osw
- Department of Chemistry, University of Pavia, Via Taramelli 12, 27100 Pavia, Italy; (G.F.); (A.N.); (P.O.)
- Department of Chemistry, College of Science, Salahaddin University, 44001 Erbil, Iraq
| | - Gabriele Bianchi
- Research Center for Renewable Energies and Environment, Istituto Donegani, Eni Spa, Via Fauser 4, 28100 Novara, Italy; (G.B.); (R.P.)
| | - Riccardo Po
- Research Center for Renewable Energies and Environment, Istituto Donegani, Eni Spa, Via Fauser 4, 28100 Novara, Italy; (G.B.); (R.P.)
| | - Dario Pasini
- Department of Chemistry, University of Pavia, Via Taramelli 12, 27100 Pavia, Italy; (G.F.); (A.N.); (P.O.)
- INSTM Research Unit, University of Pavia, Via Taramelli 12, 27100 Pavia, Italy
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Hou R, Li M, Ma X, Huang H, Lu H, Jia Q, Liu Y, Xu X, Li HB, Bo Z. Noncovalently Fused-Ring Electron Acceptors with C2v Symmetry for Regulating the Morphology of Organic Solar Cells. ACS APPLIED MATERIALS & INTERFACES 2020; 12:46220-46230. [PMID: 32938186 DOI: 10.1021/acsami.0c13993] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Four noncovalently fused-ring electron acceptors p-DOC6-2F, o-DOC6-2F, o-DOC8-2F, and o-DOC2C6-2F have been designed and synthesized. p-DOC6-2F and o-DOC6-2F have the same molecular backbone but different molecular shapes and symmetries. p-DOC6-2F has an S-shaped molecular backbone and C2h symmetry, whereas o-DOC6-2F possesses a U-shaped molecular backbone and C2v symmetry. The molecular shape and symmetry can influence the dipole moment, solubility, optical absorption, energy level, molecular packing, and film morphology. Compared with the corresponding p-DOC6-2F, o-DOC6-2F exhibits better solubility, a wider band gap, and a larger dipole moment. When blended with the donor polymer PBDB-T, the C2v symmetric o-DOC6-2F can form an appropriate active layer morphology, whereas the C2h symmetric p-DOC6-2F forms oversized domains. Organic solar cells (OSCs) based on p-DOC6-2F, o-DOC6-2F, o-DOC8-2F, and o-DOC2C6-2F obtained power conversion efficiencies of 9.23, 11.87, 11.23, and 10.80%, respectively. The result reveals that the molecular symmetry can facilely regulate the performance of OSCs.
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Affiliation(s)
- Ran Hou
- Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China
| | - Miao Li
- Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China
| | - Xueqing Ma
- Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China
| | - Hao Huang
- Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China
| | - Hao Lu
- Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China
| | - Qingqing Jia
- School of Ocean, Shandong University, Weihai 264209, P. R. China
| | - Yahui Liu
- Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China
| | - Xinjun Xu
- Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China
| | - Hai-Bei Li
- School of Ocean, Shandong University, Weihai 264209, P. R. China
| | - Zhishan Bo
- Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China
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Khan M, Hussain R, Yasir Mehboob M, Khalid M, Shafiq Z, Aslam M, Al-Saadi AA, Jamil S, Janjua MRSA. In Silico Modeling of New "Y-Series"-Based Near-Infrared Sensitive Non-Fullerene Acceptors for Efficient Organic Solar Cells. ACS OMEGA 2020; 5:24125-24137. [PMID: 32984735 PMCID: PMC7513551 DOI: 10.1021/acsomega.0c03796] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Accepted: 08/27/2020] [Indexed: 05/21/2023]
Abstract
This work was inspired by a previous report [Janjua, M. R. S. A. Inorg. Chem. 2012, 51, 11306-11314] in which the optoelectronic properties were improved with an acceptor bearing heteroaromatic rings. Herein, we have designed four novel Y-series non-fullerene acceptors (NFAs) by end-capped acceptor modifications of a recently synthesized 15% efficient Y21 molecule for better optoelectronic properties and their potential use in solar cell applications. Density functional theory (DFT) along with time-dependent density functional theory (TDDFT) at the B3LYP/6-31G(d,p) level of theory is used to calculate the band gap, exciton binding energy along with transition density matrix (TDM) analysis, reorganizational energy of electrons and holes, and absorption maxima and open-circuit voltage of investigated molecules. In addition, the PM6:YA1 complex is also studied to understand the charge shifting from the donor polymer PM6 to the NFA blend. Results of all parameters suggest that the DA'D electron-deficient core and effective end-capped acceptors in YA1-YA4 molecules form a perfect combination for effective tuning of optoelectronic properties by lowering frontier molecular orbital (FMO) energy levels, reorganization energy, and binding energy and increasing the absorption maximum and open-circuit voltage values in selected molecules (YA1-YA4). The combination of extended conjugation and excellent electron-withdrawing capability of the end-capped acceptor moiety in YA1 makes YA1 an excellent organic solar cell (OSC) candidate owing to promising photovoltaic properties including the lowest energy gap (1.924 eV), smallest electron mobility (λe = 0.0073 eV) and hole mobility (λh = 0.0083 eV), highest λmax values (783.36 nm (in gas) and 715.20 nm (in chloroform) with lowest transition energy values (E x) of 1.58 and 1.73 eV, respectively), and fine open-circuit voltage (V oc = 1.17 V) with respect to HOMOPM6-LUMOacceptor. Moreover, selected molecules are observed to have better photovoltaic properties than Y21, thus paving the way for experimentalists to look for future developments of Y-series-based highly efficient solar cells.
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Affiliation(s)
- Muhammad
Usman Khan
- Department
of Chemistry, University of Okara, Okara 56300, Pakistan
- Department
of Applied Chemistry, Government College
University, Faisalabad 38000, Pakistan
| | - Riaz Hussain
- Department
of Chemistry, University of Okara, Okara 56300, Pakistan
| | | | - Muhammad Khalid
- Department
of Chemistry, Khwaja Fareed University of
Engineering & Information Technology, Rahim Yar Khan 64200, Pakistan
| | - Zahid Shafiq
- Institute
of Chemical Sciences, Bahauddin Zakariya
University, Multan 60800, Pakistan
| | - Muhammad Aslam
- Department
of Chemistry, University of Education, Lahore 54000, Pakistan
| | - Abdulaziz A. Al-Saadi
- Department
of Chemistry, King Fahd University of Petroleum
and Minerals, Dhahran 31261, Kingdom of Saudi Arabia
| | - Saba Jamil
- Super
Light Materials and Nanotechnology Laboratory, Department of Chemistry, University of Agriculture, Faisalabad 38000, Pakistan
- Department
of Materials Science and Engineering, Cornell
University, Ithaca, New York 14853, United States
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42
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Reducing energy loss via tuning energy levels of polymer acceptors for efficient all-polymer solar cells. Sci China Chem 2020. [DOI: 10.1007/s11426-020-9826-4] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Luo Z, Ma R, Xiao Y, Liu T, Sun H, Su M, Guo Q, Li G, Gao W, Chen Y, Zou Y, Guo X, Zhang M, Lu X, Yan H, Yang C. Conformation-Tuning Effect of Asymmetric Small Molecule Acceptors on Molecular Packing, Interaction, and Photovoltaic Performance. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e2001942. [PMID: 32602255 DOI: 10.1002/smll.202001942] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 05/31/2020] [Indexed: 05/20/2023]
Abstract
Understanding the conformation effect on molecular packing, miscibility, and photovoltaic performance is important to open a new avenue for small-molecule acceptor (SMA) design. Herein, two novel acceptor-(donor-acceptor1-donor)-acceptor (A-DA1D-A)-type asymmetric SMAs are developed, namely C-shaped BDTP-4F and S-shaped BTDTP-4F. The BDTP-4F-based polymer solar cells (PSCs) with PM6 as donor, yields a power conversion efficiency (PCE) of 15.24%, significantly higher than that of the BTDTP-4F-based device (13.12%). The better PCE for BDTP-4F-based device is mainly attributed to more balanced charge transport, weaker bimolecular recombination, and more favorable morphology. Additionally, two traditional A-D-A-type SMAs (IDTP-4F and IDTTP-4F) are also synthesized to investigate the conformation effect on morphology and device performance. Different from the device result above, here, IDTP-4F with S-shape conformation outperforms than IDTTP-4F with C-shape conformation. Importantly, it is found that for these two different types of SMA, the better performing binary blend has similar morphological characteristics. Specifically, both PM6:BDTP-4F and PM6:IDTP-4F blend exhibit perfect nanofibril network structure with proper domain size, obvious face-on orientation and enhance donor-acceptor interactions, thereby better device performance. This work indicates tuning molecular conformation plays pivotal role in morphology and device effciciency, shining a light on the molecular design of the SMAs.
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Affiliation(s)
- Zhenghui Luo
- Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518060, China
- Department of Chemistry and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong, 999077, China
| | - Ruijie Ma
- Department of Chemistry and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong, 999077, China
| | - Yiqun Xiao
- Department of Physics, Chinese University of Hong Kong, New Territories, Hong Kong, 999077, P. R. China
| | - Tao Liu
- Department of Chemistry and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong, 999077, China
| | - Huiliang Sun
- Department of Materials Science and Engineering and The Shenzhen Key Laboratory for Printed Organic Electronics, Southern University of Science and Technology (SUSTech), No. 1088, Xueyuan Road, Shenzhen, Guangdong, 518055, China
| | - Mengyao Su
- Department of Materials Science and Engineering and The Shenzhen Key Laboratory for Printed Organic Electronics, Southern University of Science and Technology (SUSTech), No. 1088, Xueyuan Road, Shenzhen, Guangdong, 518055, China
| | - Qing Guo
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, Laboratory of Advanced Optoelectronic Materials, Soochow University, Suzhou, 215123, China
| | - Guanghao Li
- Department of Chemistry, Wuhan University, Wuhan, 430072, China
| | - Wei Gao
- Department of Chemistry, Wuhan University, Wuhan, 430072, China
| | - Yuzhong Chen
- Department of Chemistry and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong, 999077, China
| | - Yang Zou
- Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518060, China
| | - Xugang Guo
- Department of Materials Science and Engineering and The Shenzhen Key Laboratory for Printed Organic Electronics, Southern University of Science and Technology (SUSTech), No. 1088, Xueyuan Road, Shenzhen, Guangdong, 518055, China
| | - Maojie Zhang
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, Laboratory of Advanced Optoelectronic Materials, Soochow University, Suzhou, 215123, China
| | - Xinhui Lu
- Department of Physics, Chinese University of Hong Kong, New Territories, Hong Kong, 999077, P. R. China
| | - He Yan
- Department of Chemistry and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong, 999077, China
| | - Chuluo Yang
- Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518060, China
- Department of Chemistry, Wuhan University, Wuhan, 430072, China
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Duan T, Hou L, Fu J, Kan Z, Yang Q, Chen Q, Zhong C, Xiao Z, Yu D, Lu S. An asymmetric end-capping strategy enables a new non-fullerene acceptor for organic solar cells with efficiency over 10. Chem Commun (Camb) 2020; 56:6531-6534. [PMID: 32395735 DOI: 10.1039/d0cc01739f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two different terminal groups, rhodanine-flanked benzo[c][1,2,5]thiadiazole (BR) and 2-(5,6-difluoro-3-oxo-2,3-dihydro-1H-inden-1-ylidene)malononitrile (IM2F), were connected to an indaceno[1,2-b:5,6-b']dithiophene (IDT) core to construct a new non-fullerene acceptor (IDTBF). Solar cells based on this acceptor exhibited promising photovoltaic performances with a power conversion efficiency (PCE) of up to 10.43%.
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Affiliation(s)
- Tainan Duan
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, China.
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Li S, Zhan L, Jin Y, Zhou G, Lau TK, Qin R, Shi M, Li CZ, Zhu H, Lu X, Zhang F, Chen H. Asymmetric Electron Acceptors for High-Efficiency and Low-Energy-Loss Organic Photovoltaics. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e2001160. [PMID: 32390241 DOI: 10.1002/adma.202001160] [Citation(s) in RCA: 88] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Revised: 03/30/2020] [Accepted: 04/17/2020] [Indexed: 05/20/2023]
Abstract
Low energy loss and efficient charge separation under small driving forces are the prerequisites for realizing high power conversion efficiency (PCE) in organic photovoltaics (OPVs). Here, a new molecular design of nonfullerene acceptors (NFAs) is proposed to address above two issues simultaneously by introducing asymmetric terminals. Two NFAs, BTP-S1 and BTP-S2, are constructed by introducing halogenated indandione (A1 ) and 3-dicyanomethylene-1-indanone (A2 ) as two different conjugated terminals on the central fused core (D), wherein they share the same backbone as well-known NFA Y6, but at different terminals. Such asymmetric NFAs with A1 -D-A2 structure exhibit superior photovoltaic properties when blended with polymer donor PM6. Energy loss analysis reveals that asymmetric molecule BTP-S2 with six chlorine atoms attached at the terminals enables the corresponding devices to give an outstanding electroluminescence quantum efficiency of 2.3 × 10-2 %, one order of magnitude higher than devices based on symmetric Y6 (4.4 × 10-3 %), thus significantly lowering the nonradiative loss and energy loss of the corresponding devices. Besides, asymmetric BTP-S1 and BTP-S2 with multiple halogen atoms at the terminals exhibit fast hole transfer to the donor PM6. As a result, OPVs based on the PM6:BTP-S2 blend realize a PCE of 16.37%, higher than that (15.79%) of PM6:Y6-based OPVs. A further optimization of the ternary blend (PM6:Y6:BTP-S2) results in a best PCE of 17.43%, which is among the highest efficiencies for single-junction OPVs. This work provides an effective approach to simultaneously lower the energy loss and promote the charge separation of OPVs by molecular design strategy.
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Affiliation(s)
- Shuixing Li
- State Key Laboratory of Silicon Materials, MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Lingling Zhan
- State Key Laboratory of Silicon Materials, MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Yingzhi Jin
- Department of Physics, Chemistry and Biology (IFM), Linköping University, Linköping, 581 83, Sweden
| | - Guanqing Zhou
- School of Chemistry and Chemical Engineering, Center for Advanced Electronic Materials and Devices, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
| | - Tsz-Ki Lau
- Department of Physics, Chinese University of Hong Kong, New Territories, Hong Kong, 999077, P. R. China
| | - Ran Qin
- State Key Laboratory of Silicon Materials, MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Minmin Shi
- State Key Laboratory of Silicon Materials, MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Chang-Zhi Li
- State Key Laboratory of Silicon Materials, MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Haiming Zhu
- Department of Chemistry, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Xinhui Lu
- Department of Physics, Chinese University of Hong Kong, New Territories, Hong Kong, 999077, P. R. China
| | - Fengling Zhang
- Department of Physics, Chemistry and Biology (IFM), Linköping University, Linköping, 581 83, Sweden
| | - Hongzheng Chen
- State Key Laboratory of Silicon Materials, MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
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Wu H, Bian Q, Zhao B, Zhao H, Wang L, Wang W, Cong Z, Liu J, Ma W, Gao C. Effects of the Isomerized Thiophene-Fused Ending Groups on the Performances of Twisted Non-Fullerene Acceptor-Based Polymer Solar Cells. ACS APPLIED MATERIALS & INTERFACES 2020; 12:23904-23913. [PMID: 32362118 DOI: 10.1021/acsami.0c03842] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Recently, benefiting from the merits of small-molecule acceptors (NFAs), polymer solar cells (PSCs) have achieved tremendous advances. From the perspective of the structural characteristics of the π-conjugated acceptor-donor-acceptor (A-D-A) type of organic molecules, the backbone's planarity and the terminal groups and their substituents have strong influences on the performances of the constructed NFAs. Through enlarging the dihedral angle of the conjugated main chain of NFAs, a certain degree of enhancement of photovoltaic parameters has been achieved. To further probe the influences of ending groups on the performances of nonplanar NFAs, we synthesized two new NFAs i-cc23 and i-cc34 with isomerized thiophene-fused ending groups and a twisted π-conjugated main chain. Compared to i-cc23 containing the 2-(6-oxo-5,6-dihydro-4H-cyclopenta[b]thiophen-4-ylidene)malononitrile ending group, the acceptor i-cc34 containing 2-(6-oxo-5,6-dihydro-4H-cyclopenta[c]thiophen-4-ylidene)malononitrile has a relatively higher molar extinction coefficient, bathochromic-shifted absorption spectrum, and deepened energy levels. When mixed with PBDB-T in solar cells, the i-cc23-based device achieved an excellent open-circuit voltage (VOC) of 1.10 V and a moderate power conversion efficiency of 7.34%. Although the VOC of the i-cc34-related device was decreased to 0.96 V, the short-circuit current density and fill factor were improved, giving rise to an enhanced efficiency of 9.51%. Apart from the distinct photovoltaic performances, the two isomer-based devices exhibit a high radiative efficiency of 8 × 10-4, leading to a very small nonradiative loss of 0.19 V. Our results emphasize the importance of the isomerized thiophene-fused ending groups on the performances of nonplanar NFA-based PSCs.
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Affiliation(s)
- Haimei Wu
- State Key Laboratory of Fluorine & Nitrogen Chemicals, Xi'an Modern Chemistry Research Institute, No. 168 of East Zhangba Road, Xi'an 710065, China
| | - Qingzhen Bian
- Department of Physics, Chemistry and Biology (IFM), Linköping University, Linköping 58183, Sweden
| | - Baofeng Zhao
- State Key Laboratory of Fluorine & Nitrogen Chemicals, Xi'an Modern Chemistry Research Institute, No. 168 of East Zhangba Road, Xi'an 710065, China
| | - Heng Zhao
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, No. 28 of West Xianning Road, Xi'an 710049, China
| | - Liuchang Wang
- School of Chemical Engineering, Xi'an University, No. 168 of South Taibai Road, Xi'an 710065, China
| | - Weiping Wang
- State Key Laboratory of Fluorine & Nitrogen Chemicals, Xi'an Modern Chemistry Research Institute, No. 168 of East Zhangba Road, Xi'an 710065, China
| | - Zhiyuan Cong
- State Key Laboratory of Fluorine & Nitrogen Chemicals, Xi'an Modern Chemistry Research Institute, No. 168 of East Zhangba Road, Xi'an 710065, China
| | - Jianqun Liu
- State Key Laboratory of Fluorine & Nitrogen Chemicals, Xi'an Modern Chemistry Research Institute, No. 168 of East Zhangba Road, Xi'an 710065, China
| | - Wei Ma
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, No. 28 of West Xianning Road, Xi'an 710049, China
| | - Chao Gao
- State Key Laboratory of Fluorine & Nitrogen Chemicals, Xi'an Modern Chemistry Research Institute, No. 168 of East Zhangba Road, Xi'an 710065, China
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Zhang Y, Wang Y, Ma R, Luo Z, Liu T, Kang SH, Yan H, Yuan Z, Yang C, Chen Y. Wide Band-gap Two-dimension Conjugated Polymer Donors with Different Amounts of Chlorine Substitution on Alkoxyphenyl Conjugated Side Chains for Non-fullerene Polymer Solar Cells. CHINESE JOURNAL OF POLYMER SCIENCE 2020. [DOI: 10.1007/s10118-020-2435-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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49
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Sun R, Wu Y, Guo J, Luo Z, Yang C, Min J. High-efficiency all-small-molecule organic solar cells based on an organic molecule donor with an asymmetric thieno[2,3-f] benzofuran unit. Sci China Chem 2020. [DOI: 10.1007/s11426-020-9753-x] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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50
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Wang H, Liu T, Zhou J, Mo D, Han L, Lai H, Chen H, Zheng N, Zhu Y, Xie Z, He F. Bromination: An Alternative Strategy for Non-Fullerene Small Molecule Acceptors. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2020; 7:1903784. [PMID: 32382488 PMCID: PMC7201261 DOI: 10.1002/advs.201903784] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2019] [Revised: 02/05/2020] [Indexed: 05/20/2023]
Abstract
The concept of bromination for organic solar cells has received little attention. However, the electron withdrawing ability and noncovalent interactions of bromine are similar to those of fluorine and chlorine atoms. A tetra-brominated non-fullerene acceptor, designated as BTIC-4Br, has been recently developed by introducing bromine atoms onto the end-capping group of 2-(3-oxo-2,3-dihydro-1H-inden-1-ylidene) malononitrile and displayed a high power conversion efficiency (PCE) of 12%. To further improve its photovoltaic performance, the acceptor is optimized either by introducing a longer alkyl chain to the core or by modulating the numbers of bromine substituents. After changing each end-group to a single bromine, the BTIC-2Br-m-based devices exhibit an outstanding PCE of 16.11% with an elevated open-circuit voltage of V oc = 0.88 V, one of the highest PCEs reported among brominated non-fullerene acceptors. This significant improvement can be attributed to the higher light harvesting efficiency, optimized morphology, and higher exciton quenching efficiencies of the di-brominated acceptor. These results demonstrate that the substitution of bromine onto the terminal group of non-fullerene acceptors results in high-efficiency organic semiconductors, and promotes the use of the halogen-substituted strategy for polymer solar cell applications.
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Affiliation(s)
- Huan Wang
- Shenzhen Grubbs Institute and Department of ChemistrySouthern University of Science and TechnologyShenzhen518055China
- Faculty of Health SciencesUniversity of MacauMacao999078China
| | - Tao Liu
- Shenzhen Grubbs Institute and Department of ChemistrySouthern University of Science and TechnologyShenzhen518055China
| | - Jiadong Zhou
- Institute of Polymer Optoelectronic Materials and DevicesState Key Laboratory of Luminescent Materials and DevicesSouth China University of TechnologyGuangzhou510640China
| | - Daize Mo
- Shenzhen Grubbs Institute and Department of ChemistrySouthern University of Science and TechnologyShenzhen518055China
| | - Liang Han
- Shenzhen Grubbs Institute and Department of ChemistrySouthern University of Science and TechnologyShenzhen518055China
| | - Hanjian Lai
- Shenzhen Grubbs Institute and Department of ChemistrySouthern University of Science and TechnologyShenzhen518055China
| | - Hui Chen
- Shenzhen Grubbs Institute and Department of ChemistrySouthern University of Science and TechnologyShenzhen518055China
| | - Nan Zheng
- Institute of Polymer Optoelectronic Materials and DevicesState Key Laboratory of Luminescent Materials and DevicesSouth China University of TechnologyGuangzhou510640China
| | - Yulin Zhu
- Shenzhen Grubbs Institute and Department of ChemistrySouthern University of Science and TechnologyShenzhen518055China
| | - Zengqi Xie
- Institute of Polymer Optoelectronic Materials and DevicesState Key Laboratory of Luminescent Materials and DevicesSouth China University of TechnologyGuangzhou510640China
| | - Feng He
- Shenzhen Grubbs Institute and Department of ChemistrySouthern University of Science and TechnologyShenzhen518055China
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