1
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Pramanik A, Sinha SS, Gates K, Nie J, Han FX, Ray PC. Light-Induced Wavelength Dependent Self Assembly Process for Targeted Synthesis of Phase Stable 1D Nanobelts and 2D Nanoplatelets of CsPbI 3 Perovskites. ACS OMEGA 2023; 8:13202-13212. [PMID: 37065067 PMCID: PMC10099116 DOI: 10.1021/acsomega.3c00477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Accepted: 03/15/2023] [Indexed: 06/19/2023]
Abstract
Despite black cubic phase α-CsPbI3 nanocrystals having an ideal bandgap of 1.73 eV for optoelectronic applications, the phase transition from α-CsPbI3 to non-perovskite yellow δ-CsPbI3 phase at room temperature remains a major obstacle for commercial applications. Since γ-CsPbI3 is thermodynamically stable with a bandgap of 1.75 eV, which has great potential for photovoltaic applications, herein we report a conceptually new method for the targeted design of phase stable and near unity photoluminescence quantum yield (PLQY) two-dimensional (2D) γ-CsPbI3 nanoplatelets (NPLs) and one-dimensional (1D) γ-CsPbI3 nanobelts (NBs) by wavelength dependent light-induced assembly of CsPbI3 cubic nanocrystals. This article demonstrates for the first time that by varying the excitation wavelengths, one can design air stable desired 2D nanoplatelets or 1D nanobelts selectively. Our experimental finding indicates that 532 nm green light-driven self-assembly produces phase stable and highly luminescent γ-CsPbI3 NBs from CsPbI3 nanocrystals. Moreover, we show that a 670 nm red light-driven self-assembly process produces stable and near unity PLQY γ-CsPbI3 NPLs. Systematic time-dependent microscopy and spectroscopy studies on the morphological evolution indicates that the electromagnetic field of light triggered the desorption of surface ligands from the nanocrystal surface and transformation of crystallographic phase from α to γ. Detached ligands played an important role in determining the morphologies of final structures of NBs and NPLs from nanocrystals via oriented attachment along the [110] direction initially and then the [001] direction. In addition, XRD and fluorescence imaging data indicates that both NBs and NPLs exhibit phase stability for more than 60 days in ambient conditions, whereas the cubic phase α-CsPbI3 nanocrystals are not stable for even 3 days. The reported light driven synthesis provides a simple and versatile approach to obtain phase pure CsPbI3 for possible optoelectronic applications.
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2
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Zhang H, He X, Wang H, Chen L, Xu G, Zhang N, Qu K, He Q, Peng Y, Pan J. In situgrowth strategy to construct perovskite quantum dot@covalent organic framework composites with enhanced water stability. NANOTECHNOLOGY 2023; 34:245601. [PMID: 36881878 DOI: 10.1088/1361-6528/acc1ec] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Accepted: 03/07/2023] [Indexed: 06/18/2023]
Abstract
Metal halide perovskite quantum dots (QDs) have excellent optoelectronic properties; however, their poor stability under water or thermal conditions remains an obstacle to commercialization. Here, we used a carboxyl functional group (-COOH) to enhance the ability of a covalent organic framework (COF) to adsorb lead ions and grow CH3NH3PbBr3(MAPbBr3) QDsin situinto a mesoporous carboxyl-functionalized COF to construct MAPbBr3QDs@COF core-shell-like composites to improve the stability of perovskites. Owing to the protection of the COF, the as-prepared composites exhibited enhanced water stability, and the characteristic fluorescence was maintained for more than 15 d. These MAPbBr3QDs@COF composites can be used to fabricate white light-emitting diodes with a color comparable to natural white emission. This work demonstrates the importance of functional groups for thein situgrowth of perovskite QDs, and coating with a porous structure is an effective way to improve the stability of metal halide perovskites.
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Affiliation(s)
- Hongyan Zhang
- College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China
| | - Xiaoxiong He
- College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China
| | - Hao Wang
- College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China
| | - Liangjun Chen
- College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China
| | - Gaopeng Xu
- College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China
| | - Nan Zhang
- College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China
| | - Kang Qu
- College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China
| | - Qingquan He
- College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China
| | - Yongwu Peng
- College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China
| | - Jun Pan
- College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China
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3
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Zhang M, Bi C, Xia Y, Sun X, Wang X, Liu A, Tian S, Liu X, de Leeuw NH, Tian J. Water-Driven Synthesis of Deep-Blue Perovskite Colloidal Quantum Wells for Electroluminescent Devices. Angew Chem Int Ed Engl 2023; 62:e202300149. [PMID: 36692366 DOI: 10.1002/anie.202300149] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 01/23/2023] [Accepted: 01/24/2023] [Indexed: 01/25/2023]
Abstract
Perovskite colloidal quantum wells (QWs) are promising to realize narrow deep-blue emission, but the poor optical performance and stability suppress their practical application. Here, we creatively propose a water-driven synthesis strategy to obtain size-homogenized and strongly confined deep-blue CsPbBr3 QWs, corresponding to three monolayers, which emit at the deep-blue wavelength of 456 nm. The water controls the orientation and distribution of the ligands on the surface of the nanocrystals, thus inducing orientated growth through the Ostwald ripening process by phagocytizing unstable nanocrystals to form well-crystallized QWs. These QWs present remarkable stability and high photoluminescence quantum yield of 94 %. Furthermore, we have prepared light-emitting diodes based on the QWs via the all-solution fabrication strategy, achieving an external quantum efficiency of 1 % and luminance of 2946 cd m-2 , demonstrating state-of-the-art brightness for perovskite QW-based LEDs.
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Affiliation(s)
- Mengqi Zhang
- Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, China.,Shunde Innovation School, University of Science and Technology Beijing, Foshan, Guangdong, 528399, China
| | - Chenghao Bi
- Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, China.,Shunde Innovation School, University of Science and Technology Beijing, Foshan, Guangdong, 528399, China
| | - Yuexing Xia
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology, Beijing National Center for Nanoscience and Technology, Beijing, 100190, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xuejiao Sun
- Institute of Semiconductors Chinese Academy of Sciences, Beijing, 100083, China
| | - Xingyu Wang
- School of Chemistry, University of Leeds, Leeds, LS2 9JT, UK
| | - Aqiang Liu
- Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, China.,Shunde Innovation School, University of Science and Technology Beijing, Foshan, Guangdong, 528399, China
| | - Shuyu Tian
- Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, China.,Shunde Innovation School, University of Science and Technology Beijing, Foshan, Guangdong, 528399, China
| | - Xinfeng Liu
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology, Beijing National Center for Nanoscience and Technology, Beijing, 100190, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Nora H de Leeuw
- School of Chemistry, University of Leeds, Leeds, LS2 9JT, UK
| | - Jianjun Tian
- Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, China.,Shunde Innovation School, University of Science and Technology Beijing, Foshan, Guangdong, 528399, China
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4
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El-Zohry AM, Turedi B, Alsalloum A, Maity P, Bakr OM, Ooi BS, Mohammed OF. Ultrafast transient infrared spectroscopy for probing trapping states in hybrid perovskite films. Commun Chem 2022; 5:67. [PMID: 36698014 PMCID: PMC9814551 DOI: 10.1038/s42004-022-00683-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 05/09/2022] [Indexed: 01/28/2023] Open
Abstract
Studying the charge dynamics of perovskite materials is a crucial step to understand the outstanding performance of these materials in various fields. Herein, we utilize transient absorption in the mid-infrared region, where solely electron signatures in the conduction bands are monitored without external contributions from other dynamical species. Within the measured range of 4000 nm to 6000 nm (2500-1666 cm-1), the recombination and the trapping processes of the excited carriers could be easily monitored. Moreover, we reveal that within this spectral region the trapping process could be distinguished from recombination process, in which the iodide-based films show more tendencies to trap the excited electrons in comparison to the bromide-based derivatives. The trapping process was assigned due to the emission released in the mid-infrared region, while the traditional band-gap recombination process did not show such process. Various parameters have been tested such as film composition, excitation dependence and the probing wavelength. This study opens new frontiers for the transient mid-infrared absorption to assign the trapping process in perovskite films both qualitatively and quantitatively, along with the potential applications of perovskite films in the mid-IR region.
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Affiliation(s)
- Ahmed M. El-Zohry
- grid.45672.320000 0001 1926 5090Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900 Saudi Arabia ,grid.10548.380000 0004 1936 9377Department of Physics, AlbaNova Center, Stockholm University, 10691 Stockholm, Sweden
| | - Bekir Turedi
- grid.45672.320000 0001 1926 5090KAUST Catalysis Center, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900 Saudi Arabia
| | - Abdullah Alsalloum
- grid.45672.320000 0001 1926 5090KAUST Catalysis Center, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900 Saudi Arabia
| | - Partha Maity
- grid.45672.320000 0001 1926 5090Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900 Saudi Arabia
| | - Osman M. Bakr
- grid.45672.320000 0001 1926 5090KAUST Catalysis Center, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900 Saudi Arabia
| | - Boon S. Ooi
- grid.45672.320000 0001 1926 5090Photonics Laboratory, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900 Saudi Arabia
| | - Omar F. Mohammed
- grid.45672.320000 0001 1926 5090Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900 Saudi Arabia
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5
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Liu J, Zheng X, Mohammed OF, Bakr OM. Self-Assembly and Regrowth of Metal Halide Perovskite Nanocrystals for Optoelectronic Applications. Acc Chem Res 2022; 55:262-274. [PMID: 35037453 PMCID: PMC8811956 DOI: 10.1021/acs.accounts.1c00651] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
![]()
Over the past decade, the impressive development
of metal halide
perovskites (MHPs) has made them leading candidates for applications
in photovoltaics (PVs), X-ray scintillators, and light-emitting diodes
(LEDs). Constructing MHP nanocrystals (NCs) with promising optoelectronic
properties using a low-cost approach is critical to realizing their
commercial potential. Self-assembly and regrowth techniques provide
a simple and powerful “bottom-up” platform for controlling
the structure, shape, and dimensionality of MHP NCs. The soft ionic
nature of MHP NCs, in conjunction with their low formation energy,
rapid anion exchange, and ease of ion migration, enables the rearrangement
of their overall appearance via self-assembly or regrowth. Because
of their low formation energy and highly dynamic surface ligands,
MHP NCs have a higher propensity to regrow than conventional hard-lattice
NCs. Moreover, their self-assembly and regrowth can be achieved simultaneously.
The self-assembly of NCs into close-packed, long-range-ordered mesostructures
provides a platform for modulating their electronic properties (e.g.,
conductivity and carrier mobility). Moreover, assembled MHP NCs exhibit
collective properties (e.g., superfluorescence, renormalized emission,
longer phase coherence times, and long exciton diffusion lengths)
that can translate into dramatic improvements in device performance.
Further regrowth into fused MHP nanostructures with the removal of
ligand barriers between NCs could facilitate charge carrier transport,
eliminate surface point defects, and enhance stability against moisture,
light, and electron-beam irradiation. However, the synthesis strategies,
diversity and complexity of structures, and optoelectronic applications
that emanate from the self-assembly and regrowth of MHPs have not
yet received much attention. Consequently, a comprehensive understanding
of the design principles of self-assembled and fused MHP nanostructures
will fuel further advances in their optoelectronic applications. In this Account, we review the latest developments in the self-assembly
and regrowth of MHP NCs. We begin with a survey of the mechanisms,
driving forces, and techniques for controlling MHP NC self-assembly.
We then explore the phase transition of fused MHP nanostructures at
the atomic level, delving into the mechanisms of facet-directed connections
and the kinetics of their shape-modulation behavior, which have been
elucidated with the aid of high-resolution transmission electron microscopy
(HRTEM) and first-principles density functional theory calculations
of surface energies. We further outline the applications of assembled
and fused nanostructures. Finally, we conclude with a perspective
on current challenges and future directions in the field of MHP NCs.
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Affiliation(s)
- Jiakai Liu
- Division of Physical Sciences and Engineering, KAUST Catalysis Center (KCC), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
- College of New Materials and New Energies, Shenzhen Technology University, Shenzhen 518118, China
| | - Xiaopeng Zheng
- Division of Physical Sciences and Engineering, KAUST Catalysis Center (KCC), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Omar F. Mohammed
- Division of Physical Sciences and Engineering, KAUST Catalysis Center (KCC), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Osman M. Bakr
- Division of Physical Sciences and Engineering, KAUST Catalysis Center (KCC), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
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6
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Liu J, Song K, Zheng X, Yin J, Yao KX, Chen C, Yang H, Hedhili MN, Zhang W, Han P, Mohammed OF, Han Y, Bakr OM. Cyanamide Passivation Enables Robust Elemental Imaging of Metal Halide Perovskites at Atomic Resolution. J Phys Chem Lett 2021; 12:10402-10409. [PMID: 34672588 DOI: 10.1021/acs.jpclett.1c02830] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Lead halide perovskites (LHPs) have attracted a tremendous amount of attention because of their applications in solar cells, lighting, and optoelectronics. However, the atomistic principles underlying their decomposition processes remain in large part obscure, likely due to the lack of precise information about their local structures and composition along regions with dimensions on the angstrom scale, such as crystal interfaces. Aberration-corrected scanning transmission electron microscopy combined with X-ray energy dispersive spectroscopy (EDS) is an ideal tool, in principle, for probing such information. However, atomic-resolution EDS has not been achieved for LHPs because of their instability under electron-beam irradiation. We report the fabrication of CsPbBr3 nanoplates with high beam stability through an interface-assisted regrowth strategy using cyanamide. The ultrahigh stability of the nanoplates primarily stems from two contributions: defect-healing self-assembly/regrowth processes and surface modulation by strong electron-withdrawing cyanamide molecules. The ultrahigh stability of as-prepared CsPbBr3 nanoplates enabled atomic-resolution EDS elemental mapping, which revealed atomically and elementally resolved details of the LHP nanostructures at an unprecedented level. While improving the stability of LHPs is critical for device applications, this work illustrates how improving the beam stability of LHPs is essential for addressing fundamental questions on structure-property relations in LHPs.
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Affiliation(s)
- Jiakai Liu
- KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
- College of New Materials and New Energies, Shenzhen Technology University, Shenzhen 518118, China
| | - Kepeng Song
- KAUST Advanced Membranes and Porous Materials Center, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
- Suzhou Research Institute, Shandong University, Suzhou 215123, China
| | - Xiaopeng Zheng
- KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Jun Yin
- KAUST Advanced Membranes and Porous Materials Center, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Ke Xin Yao
- College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
| | - Cailing Chen
- KAUST Advanced Membranes and Porous Materials Center, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Haoze Yang
- KAUST Advanced Membranes and Porous Materials Center, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Mohamed Nejib Hedhili
- Imaging and Characterization Core Lab, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Wang Zhang
- College of New Materials and New Energies, Shenzhen Technology University, Shenzhen 518118, China
| | - Peigang Han
- College of New Materials and New Energies, Shenzhen Technology University, Shenzhen 518118, China
| | - Omar F Mohammed
- KAUST Advanced Membranes and Porous Materials Center, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Yu Han
- KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
- KAUST Advanced Membranes and Porous Materials Center, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Osman M Bakr
- KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
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7
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He Y, Liang Y, Liang S, Harn YW, Li Z, Zhang M, Shen D, Li Z, Yan Y, Pang X, Lin Z. Dual-Protected Metal Halide Perovskite Nanosheets with an Enhanced Set of Stabilities. Angew Chem Int Ed Engl 2021; 60:7259-7266. [PMID: 33393190 DOI: 10.1002/anie.202014983] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 12/20/2020] [Indexed: 12/14/2022]
Abstract
Approaches to achieve stable perovskite nanocrystals (PNCs) of interest, in particular those with large structural anisotropy, through protective coating of the inorganic shell at a single-nanocrystal (NC) level are comparatively few and limited in scope. Reported here is a robust amphiphilic-diblock-copolymer-enabled strategy for crafting highly-stable anisotropic CsPbBr3 nanosheets (NSs) by in situ formation of a uniform inorganic shell (1st shielding) that is intimately ligated with hydrophobic polymers (2nd shielding). The dual-protected NSs display an array of remarkable stabilities (i.e., thermal, photostability, moisture, polar solvent, aliphatic amine, etc.) and find application in white-light-emitting diodes. In principle, by anchoring other multidentate amphiphilic polymer ligands on the surface of PNCs, followed by templated-growth of shell materials of interest, a rich variety of dual-shelled, multifunctional PNCs with markedly improved stabilities can be created for use in optics, optoelectronics, and sensory devices.
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Affiliation(s)
- Yanjie He
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Yachao Liang
- Henan Joint International Research Laboratory of Living Polymerizations and Functional Nanomaterials, Henan Key Laboratory of Advanced Nylon Materials and Application, School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, China
| | - Shuang Liang
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Yeu-Wei Harn
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Zili Li
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Mingyue Zhang
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Dingfeng Shen
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Zhiwei Li
- Shenzhen Cloud Computing Center, National Supercomputing Center, Shenzhen, 518055, China
| | - Yan Yan
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Xinchang Pang
- Henan Joint International Research Laboratory of Living Polymerizations and Functional Nanomaterials, Henan Key Laboratory of Advanced Nylon Materials and Application, School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, China
| | - Zhiqun Lin
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
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8
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He Y, Liang Y, Liang S, Harn Y, Li Z, Zhang M, Shen D, Li Z, Yan Y, Pang X, Lin Z. Dual‐Protected Metal Halide Perovskite Nanosheets with an Enhanced Set of Stabilities. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202014983] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Yanjie He
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Yachao Liang
- Henan Joint International Research Laboratory of Living Polymerizations and Functional Nanomaterials Henan Key Laboratory of Advanced Nylon Materials and Application School of Materials Science and Engineering Zhengzhou University Zhengzhou 450001 China
| | - Shuang Liang
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Yeu‐Wei Harn
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Zili Li
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Mingyue Zhang
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Dingfeng Shen
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Zhiwei Li
- Shenzhen Cloud Computing Center National Supercomputing Center Shenzhen 518055 China
| | - Yan Yan
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Xinchang Pang
- Henan Joint International Research Laboratory of Living Polymerizations and Functional Nanomaterials Henan Key Laboratory of Advanced Nylon Materials and Application School of Materials Science and Engineering Zhengzhou University Zhengzhou 450001 China
| | - Zhiqun Lin
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
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9
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Li H, Liu X, Ying Q, Wang C, Jia W, Xing X, Yin L, Lu Z, Zhang K, Pan Y, Shi Z, Huang L, Jia D. Self‐Assembly of Perovskite CsPbBr
3
Quantum Dots Driven by a Photo‐Induced Alkynyl Homocoupling Reaction. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202004947] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Hongbo Li
- Institute of Advanced Materials (IAM) Nanjing Tech University 30 South Puzhu Road Nanjing Jiangsu 211816 China
| | - Xiangdong Liu
- Institute of Advanced Materials (IAM) Nanjing Tech University 30 South Puzhu Road Nanjing Jiangsu 211816 China
| | - Qifei Ying
- Institute of Advanced Materials (IAM) Nanjing Tech University 30 South Puzhu Road Nanjing Jiangsu 211816 China
| | - Chao Wang
- College of Engineering and Applied Sciences State Key Laboratory of Analytical Chemistry for Life Science Jiangsu Key Laboratory of Artificial Functional Materials Nanjing University Nanjing Jiangsu 211816 China
| | - Wei Jia
- Laboratory of Energy Materials Chemistry Ministry of Education Key Laboratory of Advanced Functional Materials Autonomous Region Institute of Applied Chemistry Xinjiang University Urumqi Xinjiang 830046 China
| | - Xing Xing
- College of Engineering and Applied Sciences State Key Laboratory of Analytical Chemistry for Life Science Jiangsu Key Laboratory of Artificial Functional Materials Nanjing University Nanjing Jiangsu 211816 China
| | - Lisha Yin
- Institute of Advanced Materials (IAM) Nanjing Tech University 30 South Puzhu Road Nanjing Jiangsu 211816 China
| | - Zhenda Lu
- College of Engineering and Applied Sciences State Key Laboratory of Analytical Chemistry for Life Science Jiangsu Key Laboratory of Artificial Functional Materials Nanjing University Nanjing Jiangsu 211816 China
| | - Kun Zhang
- Institute of Advanced Materials (IAM) Nanjing Tech University 30 South Puzhu Road Nanjing Jiangsu 211816 China
| | - Yue Pan
- Institute of Advanced Materials (IAM) Nanjing Tech University 30 South Puzhu Road Nanjing Jiangsu 211816 China
| | - Zhan Shi
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of Chemistry Jilin University Changchun Jilin 130012 China
| | - Ling Huang
- Institute of Advanced Materials (IAM) Nanjing Tech University 30 South Puzhu Road Nanjing Jiangsu 211816 China
| | - Dianzeng Jia
- Laboratory of Energy Materials Chemistry Ministry of Education Key Laboratory of Advanced Functional Materials Autonomous Region Institute of Applied Chemistry Xinjiang University Urumqi Xinjiang 830046 China
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10
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Li H, Liu X, Ying Q, Wang C, Jia W, Xing X, Yin L, Lu Z, Zhang K, Pan Y, Shi Z, Huang L, Jia D. Self-Assembly of Perovskite CsPbBr 3 Quantum Dots Driven by a Photo-Induced Alkynyl Homocoupling Reaction. Angew Chem Int Ed Engl 2020; 59:17207-17213. [PMID: 32578927 DOI: 10.1002/anie.202004947] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2020] [Revised: 06/04/2020] [Indexed: 12/29/2022]
Abstract
Herein, we report the facile growth of three-dimensional CsPbBr3 perovskite supercrystals (PSCs) self-assembled from individual CsPbBr3 perovskite quantum dots (PQDs). By varying the carbon chain length of a surface-bound ligand molecule, 1-alkynyl acid, different morphologies of PSCs were obtained accompanied by an over 1000-fold photoluminescence improvement compared with that of PQDs. Systematic analyses have shown, for the first time, that under UV irradiation, CsBr, the byproduct formed during PQDs synthesis, could effectively catalyze the homocoupling reaction between two alkynyl groups, which further worked as a driving force to push forward the self-assembly of PQDs.
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Affiliation(s)
- Hongbo Li
- Institute of Advanced Materials (IAM), Nanjing Tech University, 30 South Puzhu Road, Nanjing, Jiangsu, 211816, China
| | - Xiangdong Liu
- Institute of Advanced Materials (IAM), Nanjing Tech University, 30 South Puzhu Road, Nanjing, Jiangsu, 211816, China
| | - Qifei Ying
- Institute of Advanced Materials (IAM), Nanjing Tech University, 30 South Puzhu Road, Nanjing, Jiangsu, 211816, China
| | - Chao Wang
- College of Engineering and Applied Sciences, State Key Laboratory of Analytical Chemistry for Life Science, Jiangsu Key Laboratory of Artificial Functional Materials, Nanjing University, Nanjing, Jiangsu, 211816, China
| | - Wei Jia
- Laboratory of Energy Materials Chemistry, Ministry of Education, Key Laboratory of Advanced Functional Materials, Autonomous Region, Institute of Applied Chemistry, Xinjiang University, Urumqi, Xinjiang, 830046, China
| | - Xing Xing
- College of Engineering and Applied Sciences, State Key Laboratory of Analytical Chemistry for Life Science, Jiangsu Key Laboratory of Artificial Functional Materials, Nanjing University, Nanjing, Jiangsu, 211816, China
| | - Lisha Yin
- Institute of Advanced Materials (IAM), Nanjing Tech University, 30 South Puzhu Road, Nanjing, Jiangsu, 211816, China
| | - Zhenda Lu
- College of Engineering and Applied Sciences, State Key Laboratory of Analytical Chemistry for Life Science, Jiangsu Key Laboratory of Artificial Functional Materials, Nanjing University, Nanjing, Jiangsu, 211816, China
| | - Kun Zhang
- Institute of Advanced Materials (IAM), Nanjing Tech University, 30 South Puzhu Road, Nanjing, Jiangsu, 211816, China
| | - Yue Pan
- Institute of Advanced Materials (IAM), Nanjing Tech University, 30 South Puzhu Road, Nanjing, Jiangsu, 211816, China
| | - Zhan Shi
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, Jilin, 130012, China
| | - Ling Huang
- Institute of Advanced Materials (IAM), Nanjing Tech University, 30 South Puzhu Road, Nanjing, Jiangsu, 211816, China
| | - Dianzeng Jia
- Laboratory of Energy Materials Chemistry, Ministry of Education, Key Laboratory of Advanced Functional Materials, Autonomous Region, Institute of Applied Chemistry, Xinjiang University, Urumqi, Xinjiang, 830046, China
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11
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Li S, Probst J, Howes PD, deMello AJ. Long-armed hexapod nanocrystals of cesium lead bromide. NANOSCALE 2020; 12:14808-14817. [PMID: 32633307 DOI: 10.1039/d0nr02985h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Colloidal lead halide perovskite nanocrystals (LHP NCs) assume a variety of morphologies (e.g. cubes, sheets, and wires). Their labile structural and surface characters allow them to undergo post-synthetic evolution of shape and crystallographic characters. Such transformations can be advantageous or deleterious, and it is therefore vital to both understand and exert control over these processes. In this study, we report novel long-armed hexapod structures of cesium lead bromide nanocrystals. These branched structures evolve from quantum-confined CsPbBr3 nanosheets to Cs4PbBr6 hexapods over a period of 24 hours. Time-resolved optical and structural characterization reveals a post-synthesis mechanism of phase transformation, oriented attachment and branch elongation. More generally, the study reveals important processes associated with LHP NC aging and demonstrates the utility of slow reaction kinetics in obtaining complex morphologies.
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Affiliation(s)
- Shangkun Li
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir Prelog Weg 1, 8093 Zürich, Switzerland.
| | - Julie Probst
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir Prelog Weg 1, 8093 Zürich, Switzerland.
| | - Philip D Howes
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir Prelog Weg 1, 8093 Zürich, Switzerland.
| | - Andrew J deMello
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir Prelog Weg 1, 8093 Zürich, Switzerland.
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