Rational Design on Chemical Regulation of Interfacial Microstress Engineering by Matching Young's Modulus in a CsPbBr 3 Perovskite Film with Mechanical Compatibility toward Enhanced Photoelectric Conversion Efficiency.

Autor:	Cui CY; State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, PR China.; College of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, PR China., Li CX; State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, PR China.; College of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, PR China., Liu WW; State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, PR China.; College of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, PR China., Liu YC; State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, PR China.; College of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, PR China., Niu ST; State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, PR China.; College of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, PR China., Xu ZQ; State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, PR China.; College of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, PR China., Zou R; State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, PR China.; College of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, PR China., Niu WJ; State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, PR China.; College of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, PR China., Liu MC; State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, PR China.; College of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, PR China., Liu MJ; Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan.; Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013, Taiwan.; Department of Physics, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan., Gu B; Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan.; Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013, Taiwan.; Department of Physics, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan., Zhao K; State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, PR China.; College of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, PR China., Liu N; Zibo Institute of Measurement Technology, Zibo 255020, PR China., Lin CJ; Foshan Flex Photonics Co. Ltd., Foshan 528299, PR China., Wu YZ; State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, PR China.; College of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, PR China., Chueh YL; Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan.; Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013, Taiwan.; Department of Physics, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan.
Jazyk:	angličtina
Zdroj:	ACS applied materials & interfaces [ACS Appl Mater Interfaces] 2022 May 04; Vol. 14 (17), pp. 20257-20267. Date of Electronic Publication: 2022 Apr 22.
DOI:	10.1021/acsami.2c02694
Abstrakt:	Thermodynamically induced tensile stress in the perovskite film will lead to the formation of atomic vacancies, seriously destroying the photovoltaic efficiency stability of the perovskite solar cells (PSCs). Among them, cations and halide anions vacancies are unavoidable; these point vacancies are considered to be a major source of the ionic migration and perovskite degradation at the crystal boundary and surface of the perovskite films. Here, we use choline bromide to modify the perovskite film by occupying the atomic defects in the CsPbBr 3 perovskite film. The results show that the zwitterion quaternary ammonium ions and bromide ions in choline bromide can simultaneously occupy the Cs + cation and Br - anions vacancies in the perovskite film by the ionic bonding effect, for which the defect-state density on the surface of the perovskite film can be significantly reduced, leading to the effective enhancement of carrier lifetime. In addition, the residual stress at the crystal boundary can be effectively reduced by lowering the Young's modulus in the CsPbBr 3 perovskite film. As a result, the optimized device achieves a photoelectric conversion efficiency (PCE) of 9.06% with an increase of 41.1% compared to the control device with a PCE of 6.42%. Most importantly, the newborn thermal stress due to thermal expansion during heat working conditions can be transferred from the polycrystalline perovskite to the carbon layer by the matched Young's modulus, thus resulting in improved stability perovskite film under environmental conditions. The work provides new insights for preparing high-quality perovskite films with low defect-state density and residual stress.
Databáze:	MEDLINE
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