1
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Park SM, Wei M, Lempesis N, Yu W, Hossain T, Agosta L, Carnevali V, Atapattu HR, Serles P, Eickemeyer FT, Shin H, Vafaie M, Choi D, Darabi K, Jung ED, Yang Y, Kim DB, Zakeeruddin SM, Chen B, Amassian A, Filleter T, Kanatzidis MG, Graham KR, Xiao L, Rothlisberger U, Grätzel M, Sargent EH. Low-loss contacts on textured substrates for inverted perovskite solar cells. Nature 2023; 624:289-294. [PMID: 37871614 DOI: 10.1038/s41586-023-06745-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Accepted: 10/12/2023] [Indexed: 10/25/2023]
Abstract
Inverted perovskite solar cells (PSCs) promise enhanced operating stability compared to their normal-structure counterparts1-3. To improve efficiency further, it is crucial to combine effective light management with low interfacial losses4,5. Here we develop a conformal self-assembled monolayer (SAM) as the hole-selective contact on light-managing textured substrates. Molecular dynamics simulations indicate that cluster formation during phosphonic acid adsorption leads to incomplete SAM coverage. We devise a co-adsorbent strategy that disassembles high-order clusters, thus homogenizing the distribution of phosphonic acid molecules, and thereby minimizing interfacial recombination and improving electronic structures. We report a laboratory-measured power conversion efficiency (PCE) of 25.3% and a certified quasi-steady-state PCE of 24.8% for inverted PSCs, with a photocurrent approaching 95% of the Shockley-Queisser maximum. An encapsulated device having a PCE of 24.6% at room temperature retains 95% of its peak performance when stressed at 65 °C and 50% relative humidity following more than 1,000 h of maximum power point tracking under 1 sun illumination. This represents one of the most stable PSCs subjected to accelerated ageing: achieved with a PCE surpassing 24%. The engineering of phosphonic acid adsorption on textured substrates offers a promising avenue for efficient and stable PSCs. It is also anticipated to benefit other optoelectronic devices that require light management.
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Affiliation(s)
- So Min Park
- Department of Chemistry, Northwestern University, Evanston, IL, USA
- Department of Electrical and Computer Engineering, University of Toronto, Toronto, Ontario, Canada
| | - Mingyang Wei
- Laboratory of Photonics and Interfaces, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Nikolaos Lempesis
- Laboratory of Computational Chemistry and Biochemistry, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Wenjin Yu
- State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, Department of Physics, Peking University, Beijing, P. R. China
| | - Tareq Hossain
- Department of Chemistry, University of Kentucky, Lexington, KY, USA
| | - Lorenzo Agosta
- Laboratory of Computational Chemistry and Biochemistry, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Virginia Carnevali
- Laboratory of Computational Chemistry and Biochemistry, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | | | - Peter Serles
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, Ontario, Canada
| | - Felix T Eickemeyer
- Laboratory of Photonics and Interfaces, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Heejong Shin
- Department of Chemistry, Northwestern University, Evanston, IL, USA
| | - Maral Vafaie
- Department of Electrical and Computer Engineering, University of Toronto, Toronto, Ontario, Canada
| | - Deokjae Choi
- Department of Chemistry, Northwestern University, Evanston, IL, USA
| | - Kasra Darabi
- Department of Materials Science and Engineering, and Organic and Carbon Electronics Laboratories (ORaCEL), North Carolina State University, Raleigh, NC, USA
| | - Eui Dae Jung
- Department of Electrical and Computer Engineering, University of Toronto, Toronto, Ontario, Canada
| | - Yi Yang
- Department of Chemistry, Northwestern University, Evanston, IL, USA
| | - Da Bin Kim
- Department of Electrical and Computer Engineering, University of Toronto, Toronto, Ontario, Canada
| | - Shaik M Zakeeruddin
- Laboratory of Photonics and Interfaces, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Bin Chen
- Department of Chemistry, Northwestern University, Evanston, IL, USA
| | - Aram Amassian
- Department of Materials Science and Engineering, and Organic and Carbon Electronics Laboratories (ORaCEL), North Carolina State University, Raleigh, NC, USA
| | - Tobin Filleter
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, Ontario, Canada
| | | | - Kenneth R Graham
- Department of Chemistry, University of Kentucky, Lexington, KY, USA
| | - Lixin Xiao
- State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, Department of Physics, Peking University, Beijing, P. R. China
| | - Ursula Rothlisberger
- Laboratory of Computational Chemistry and Biochemistry, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Michael Grätzel
- Laboratory of Photonics and Interfaces, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland.
| | - Edward H Sargent
- Department of Chemistry, Northwestern University, Evanston, IL, USA.
- Department of Electrical and Computer Engineering, University of Toronto, Toronto, Ontario, Canada.
- Department of Electrical and Computer Engineering, Northwestern University, Evanston, IL, USA.
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2
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Park SM, Wei M, Xu J, Atapattu HR, Eickemeyer FT, Darabi K, Grater L, Yang Y, Liu C, Teale S, Chen B, Chen H, Wang T, Zeng L, Maxwell A, Wang Z, Rao KR, Cai Z, Zakeeruddin SM, Pham JT, Risko CM, Amassian A, Kanatzidis MG, Graham KR, Grätzel M, Sargent EH. Engineering ligand reactivity enables high-temperature operation of stable perovskite solar cells. Science 2023; 381:209-215. [PMID: 37440655 DOI: 10.1126/science.adi4107] [Citation(s) in RCA: 26] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Accepted: 06/06/2023] [Indexed: 07/15/2023]
Abstract
Perovskite solar cells (PSCs) consisting of interfacial two- and three-dimensional heterostructures that incorporate ammonium ligand intercalation have enabled rapid progress toward the goal of uniting performance with stability. However, as the field continues to seek ever-higher durability, additional tools that avoid progressive ligand intercalation are needed to minimize degradation at high temperatures. We used ammonium ligands that are nonreactive with the bulk of perovskites and investigated a library that varies ligand molecular structure systematically. We found that fluorinated aniliniums offer interfacial passivation and simultaneously minimize reactivity with perovskites. Using this approach, we report a certified quasi-steady-state power-conversion efficiency of 24.09% for inverted-structure PSCs. In an encapsulated device operating at 85°C and 50% relative humidity, we document a 1560-hour T85 at maximum power point under 1-sun illumination.
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Affiliation(s)
- So Min Park
- Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario M5S 3G4, Canada
| | - Mingyang Wei
- Laboratory of Photonics and Interfaces, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Jian Xu
- Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario M5S 3G4, Canada
| | - Harindi R Atapattu
- Department of Chemistry, University of Kentucky, Lexington, KY 40506, USA
| | - Felix T Eickemeyer
- Laboratory of Photonics and Interfaces, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Kasra Darabi
- Department of Materials Science and Engineering, and Organic and Carbon Electronics Laboratories (ORaCEL), North Carolina State University, Raleigh, NC 27695, USA
| | - Luke Grater
- Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario M5S 3G4, Canada
| | - Yi Yang
- Department of Chemistry, Northwestern University, Evanston, IL 60208, USA
| | - Cheng Liu
- Department of Chemistry, Northwestern University, Evanston, IL 60208, USA
| | - Sam Teale
- Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario M5S 3G4, Canada
| | - Bin Chen
- Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario M5S 3G4, Canada
- Department of Chemistry, Northwestern University, Evanston, IL 60208, USA
| | - Hao Chen
- Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario M5S 3G4, Canada
| | - Tonghui Wang
- Department of Materials Science and Engineering, and Organic and Carbon Electronics Laboratories (ORaCEL), North Carolina State University, Raleigh, NC 27695, USA
| | - Lewei Zeng
- Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario M5S 3G4, Canada
| | - Aidan Maxwell
- Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario M5S 3G4, Canada
| | - Zaiwei Wang
- Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario M5S 3G4, Canada
| | - Keerthan R Rao
- Department of Chemistry, University of Kentucky, Lexington, KY 40506, USA
| | - Zhuoyun Cai
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA
| | - Shaik M Zakeeruddin
- Laboratory of Photonics and Interfaces, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Jonathan T Pham
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA
| | - Chad M Risko
- Department of Chemistry, University of Kentucky, Lexington, KY 40506, USA
| | - Aram Amassian
- Department of Materials Science and Engineering, and Organic and Carbon Electronics Laboratories (ORaCEL), North Carolina State University, Raleigh, NC 27695, USA
| | | | - Kenneth R Graham
- Department of Chemistry, University of Kentucky, Lexington, KY 40506, USA
| | - Michael Grätzel
- Laboratory of Photonics and Interfaces, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Edward H Sargent
- Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario M5S 3G4, Canada
- Department of Chemistry, Northwestern University, Evanston, IL 60208, USA
- Department of Electrical and Computer Engineering, Northwestern University, Evanston, IL 60208, USA
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3
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Ma K, Sun J, Atapattu HR, Larson BW, Yang H, Sun D, Chen K, Wang K, Lee Y, Tang Y, Bhoopalam A, Huang L, Graham KR, Mei J, Dou L. Holistic energy landscape management in 2D/3D heterojunction via molecular engineering for efficient perovskite solar cells. Sci Adv 2023; 9:eadg0032. [PMID: 37285424 DOI: 10.1126/sciadv.adg0032] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Accepted: 05/01/2023] [Indexed: 06/09/2023]
Abstract
Constructing two-dimensional (2D) perovskite atop of 3D with energy landscape management is still a challenge in perovskite photovoltaics. Here, we report a strategy through designing a series of π-conjugated organic cations to construct stable 2D perovskites and to realize delicate energy level tunability at 2D/3D heterojunctions. As a result, the hole transfer energy barriers can be reduced both at heterojunctions and within 2D structures, and the preferable work function shift reduces charge accumulation at interface. Leveraging these insights and also benefitted from the superior interface contact between conjugated cations and poly(triarylamine) (PTAA) hole transporting layer, a solar cell with power conversion efficiency of 24.6% has been achieved, which is the highest among PTAA-based n-i-p devices to the best of our knowledge. The devices exhibit greatly enhanced stability and reproducibility. This approach is generic to several hole transporting materials, offering opportunities to realize high efficiency without using the unstable Spiro-OMeTAD.
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Affiliation(s)
- Ke Ma
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN 47907, USA
| | - Jiaonan Sun
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN 47907, USA
| | - Harindi R Atapattu
- Department of Chemistry, University of Kentucky, Lexington, KY 40506, USA
| | - Bryon W Larson
- Chemistry and Nanoscience Center, National Renewable Energy Laboratory, Golden, CO 80401, USA
| | - Hanjun Yang
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN 47907, USA
- Department of Chemistry, Purdue University, West Lafayette, IN 47907, USA
| | - Dewei Sun
- Department of Chemistry, Purdue University, West Lafayette, IN 47907, USA
| | - Ke Chen
- Department of Chemistry, Purdue University, West Lafayette, IN 47907, USA
| | - Kang Wang
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN 47907, USA
| | - Yoonho Lee
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN 47907, USA
| | - Yuanhao Tang
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN 47907, USA
| | - Anika Bhoopalam
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN 47907, USA
| | - Libai Huang
- Department of Chemistry, Purdue University, West Lafayette, IN 47907, USA
| | - Kenneth R Graham
- Department of Chemistry, University of Kentucky, Lexington, KY 40506, USA
| | - Jianguo Mei
- Department of Chemistry, Purdue University, West Lafayette, IN 47907, USA
| | - Letian Dou
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN 47907, USA
- Birck Nanotechnology Center, Purdue University, West Lafayette, IN 47907, USA
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4
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Sun J, Ma K, Lin ZY, Tang Y, Varadharajan D, Chen AX, Atapattu HR, Lee YH, Chen K, Boudouris BW, Graham KR, Lipomi DJ, Mei J, Savoie BM, Dou L. Tailoring Molecular-Scale Contact at the Perovskite/Polymeric Hole-Transporting Material Interface for Efficient Solar Cells. Adv Mater 2023:e2300647. [PMID: 36942854 DOI: 10.1002/adma.202300647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 03/12/2023] [Indexed: 05/06/2023]
Abstract
Perovskite solar cells (PSCs) have delivered a power conversion efficiency (PCE) of more than 25% and incorporating polymers as hole-transporting layers (HTLs) can further enhance the stability of devices toward the goal of commercialization. Among the various polymeric hole-transporting materials, poly(triaryl amine) (PTAA) is one of the promising HTL candidates with good stability; however, the hydrophobicity of PTAA causes problematic interfacial contact with the perovskite, limiting the device performance. Using molecular side-chain engineering, a uniform 2D perovskite interlayer with conjugated ligands, between 3D perovskites and PTAA is successfully constructed. Further, employing conjugated ligands as cohesive elements, perovskite/PTAA interfacial adhesion is significantly improved. As a result, the thin and lateral extended 2D/3D heterostructure enables as-fabricated PTAA-based PSCs to achieve a PCE of 23.7%, improved from the 18% of reference devices. Owing to the increased ion-migration energy barrier and conformal 2D coating, unencapsulated devices with the new ligands exhibit both superior thermal stability under 60 °C heating and moisture stability in ambient conditions.
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Affiliation(s)
- Jiaonan Sun
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Ke Ma
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Zih-Yu Lin
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Yuanhao Tang
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Dharini Varadharajan
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Alexander X Chen
- Department of NanoEngineering, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Harindi R Atapattu
- Department of Chemistry, University of Kentucky, Lexington, KY, 40506, USA
| | - Yoon Ho Lee
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Ke Chen
- Department of Chemistry, Purdue University, West Lafayette, IN, 47907, USA
| | - Bryan W Boudouris
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Kenneth R Graham
- Department of Chemistry, University of Kentucky, Lexington, KY, 40506, USA
| | - Darren J Lipomi
- Department of NanoEngineering, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Jianguo Mei
- Department of Chemistry, Purdue University, West Lafayette, IN, 47907, USA
| | - Brett M Savoie
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Letian Dou
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN, 47907, USA
- Birck Nanotechnology Center, Purdue University, West Lafayette, IN, 47907, USA
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5
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Wang K, Lin ZY, Zhang Z, Jin L, Ma K, Coffey AH, Atapattu HR, Gao Y, Park JY, Wei Z, Finkenauer BP, Zhu C, Meng X, Chowdhury SN, Chen Z, Terlier T, Do TH, Yao Y, Graham KR, Boltasseva A, Guo TF, Huang L, Gao H, Savoie BM, Dou L. Suppressing phase disproportionation in quasi-2D perovskite light-emitting diodes. Nat Commun 2023; 14:397. [PMID: 36693860 PMCID: PMC9873927 DOI: 10.1038/s41467-023-36118-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2022] [Accepted: 01/17/2023] [Indexed: 01/26/2023] Open
Abstract
Electroluminescence efficiencies and stabilities of quasi-two-dimensional halide perovskites are restricted by the formation of multiple-quantum-well structures with broad and uncontrollable phase distributions. Here, we report a ligand design strategy to substantially suppress diffusion-limited phase disproportionation, thereby enabling better phase control. We demonstrate that extending the π-conjugation length and increasing the cross-sectional area of the ligand enables perovskite thin films with dramatically suppressed ion transport, narrowed phase distributions, reduced defect densities, and enhanced radiative recombination efficiencies. Consequently, we achieved efficient and stable deep-red light-emitting diodes with a peak external quantum efficiency of 26.3% (average 22.9% among 70 devices and cross-checked) and a half-life of ~220 and 2.8 h under a constant current density of 0.1 and 12 mA/cm2, respectively. Our devices also exhibit wide wavelength tunability and improved spectral and phase stability compared with existing perovskite light-emitting diodes. These discoveries provide critical insights into the molecular design and crystallization kinetics of low-dimensional perovskite semiconductors for light-emitting devices.
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Affiliation(s)
- Kang Wang
- grid.169077.e0000 0004 1937 2197Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN USA
| | - Zih-Yu Lin
- grid.169077.e0000 0004 1937 2197Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN USA
| | - Zihan Zhang
- grid.255986.50000 0004 0472 0419Department of Physics, Florida State University, Tallahassee, FL USA
| | - Linrui Jin
- grid.169077.e0000 0004 1937 2197Department of Chemistry, Purdue University, West Lafayette, IN USA
| | - Ke Ma
- grid.169077.e0000 0004 1937 2197Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN USA
| | - Aidan H. Coffey
- grid.169077.e0000 0004 1937 2197Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN USA
| | - Harindi R. Atapattu
- grid.266539.d0000 0004 1936 8438Department of Chemistry, University of Kentucky, Lexington, KY USA
| | - Yao Gao
- grid.169077.e0000 0004 1937 2197Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN USA
| | - Jee Yung Park
- grid.169077.e0000 0004 1937 2197Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN USA
| | - Zitang Wei
- grid.169077.e0000 0004 1937 2197Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN USA
| | - Blake P. Finkenauer
- grid.169077.e0000 0004 1937 2197Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN USA
| | - Chenhui Zhu
- grid.184769.50000 0001 2231 4551Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA USA
| | - Xiangeng Meng
- grid.443420.50000 0000 9755 8940School of Materials Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China
| | - Sarah N. Chowdhury
- grid.169077.e0000 0004 1937 2197Birck Nanotechnology Center, Purdue University, West Lafayette, IN USA
| | - Zhaoyang Chen
- grid.266436.30000 0004 1569 9707Department of Electrical and Computer Engineering and Texas Center for Superconductivity at the University of Houston (TcSUH), University of Houston, Houston, TX USA
| | - Tanguy Terlier
- grid.21940.3e0000 0004 1936 8278SIMS laboratory, Shared Equipment Authority, Rice University, Houston, TX USA
| | - Thi-Hoai Do
- grid.64523.360000 0004 0532 3255Department of Photonics, National Cheng Kung University, Tainan, Taiwan
| | - Yan Yao
- grid.266436.30000 0004 1569 9707Department of Electrical and Computer Engineering and Texas Center for Superconductivity at the University of Houston (TcSUH), University of Houston, Houston, TX USA
| | - Kenneth R. Graham
- grid.266539.d0000 0004 1936 8438Department of Chemistry, University of Kentucky, Lexington, KY USA
| | - Alexandra Boltasseva
- grid.169077.e0000 0004 1937 2197Birck Nanotechnology Center, Purdue University, West Lafayette, IN USA
| | - Tzung-Fang Guo
- grid.64523.360000 0004 0532 3255Department of Photonics, National Cheng Kung University, Tainan, Taiwan
| | - Libai Huang
- grid.169077.e0000 0004 1937 2197Department of Chemistry, Purdue University, West Lafayette, IN USA
| | - Hanwei Gao
- grid.255986.50000 0004 0472 0419Department of Physics, Florida State University, Tallahassee, FL USA
| | - Brett M. Savoie
- grid.169077.e0000 0004 1937 2197Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN USA
| | - Letian Dou
- grid.169077.e0000 0004 1937 2197Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN USA ,grid.169077.e0000 0004 1937 2197Birck Nanotechnology Center, Purdue University, West Lafayette, IN USA
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6
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Ma K, Atapattu HR, Zhao Q, Gao Y, Finkenauer BP, Wang K, Chen K, Park SM, Coffey AH, Zhu C, Huang L, Graham KR, Mei J, Dou L. Multifunctional Conjugated Ligand Engineering for Stable and Efficient Perovskite Solar Cells. Adv Mater 2021; 33:e2100791. [PMID: 34219297 DOI: 10.1002/adma.202100791] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 04/04/2021] [Indexed: 05/05/2023]
Abstract
Surface passivation is an effective way to boost the efficiency and stability of perovskite solar cells (PSCs). However, a key challenge faced by most of the passivation strategies is reducing the interface charge recombination without imposing energy barriers to charge extraction. Here, a novel multifunctional semiconducting organic ammonium cationic interface modifier inserted between the light-harvesting perovskite film and the hole-transporting layer is reported. It is shown that the conjugated cations can directly extract holes from perovskite efficiently, and simultaneously reduce interface non-radiative recombination. Together with improved energy level alignment and the stabilized interface in the device, a triple-cation mixed-halide medium-bandgap PSC with an excellent power conversion efficiency of 22.06% (improved from 19.94%) and suppressed ion migration and halide phase segregation, which lead to a long-term operational stability, is demonstrated. This strategy provides a new practical method of interface engineering in PSCs toward improved efficiency and stability.
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Affiliation(s)
- Ke Ma
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Harindi R Atapattu
- Department of Chemistry, University of Kentucky, Lexington, KY, 40506, USA
| | - Qiuchen Zhao
- Department of Chemistry, Purdue University, West Lafayette, IN, 47907, USA
| | - Yao Gao
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Blake P Finkenauer
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Kang Wang
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Ke Chen
- Department of Chemistry, Purdue University, West Lafayette, IN, 47907, USA
| | - So Min Park
- Department of Chemistry, University of Kentucky, Lexington, KY, 40506, USA
| | - Aidan H Coffey
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Chenhui Zhu
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, 94704, USA
| | - Libai Huang
- Department of Chemistry, Purdue University, West Lafayette, IN, 47907, USA
| | - Kenneth R Graham
- Department of Chemistry, University of Kentucky, Lexington, KY, 40506, USA
| | - Jianguo Mei
- Department of Chemistry, Purdue University, West Lafayette, IN, 47907, USA
| | - Letian Dou
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN, 47907, USA
- Birck Nanotechnology Center, Purdue University, West Lafayette, IN, 47907, USA
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