Enhanced Structural Stability and Pressure-Induced Photoconductivity in Two-Dimensional Hybrid Perovskite (C 6 H 5 CH 2 NH 3 ) 2 CuBr 4

Enhanced Structural Stability and Pressure-Induced Photoconductivity in Two-Dimensional Hybrid Perovskite (C 6 H 5 CH 2 NH 3 ) 2 CuBr 4

The eco-friendly properties enable two-dimensional (2D) Cu-based perovskites as ideal candidates for next-generation optoelectronics, but practical application is limited by low photoelectric conversion efficiency because of poor carrier transport abilities. Here, we report enhanced structural stabi...

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Veröffentlicht in:Angewandte Chemie International Edition 2022-07, Vol.61 (28), p.e202205491
Hauptverfasser: Zhan, Xinhui, Jiang, Xiaomei, Lv, Pin, Xu, Jie, Li, Fengjiao, Chen, Zhaolai, Liu, Xiaobing
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container_issue 28
container_start_page e202205491
container_title Angewandte Chemie International Edition
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creator Zhan, Xinhui
Jiang, Xiaomei
Lv, Pin
Xu, Jie
Li, Fengjiao
Chen, Zhaolai
Liu, Xiaobing
description The eco-friendly properties enable two-dimensional (2D) Cu-based perovskites as ideal candidates for next-generation optoelectronics, but practical application is limited by low photoelectric conversion efficiency because of poor carrier transport abilities. Here, we report enhanced structural stability of 2D CuBr perovskites under compression up to 30 GPa, without obvious volume collapse or structural amorphization, by inserting organic C H CH NH (PMA) groups between layers. The band gap value of (PMA) CuBr can be effectively tuned from 1.8 to 1.47 eV by employing external pressures, leading to a broadened absorption range of 400-800 nm. Notably, we successfully detected photoconductivity of the photoresponse at pressures from 10 to 40 GPa; the maximum value of 5×10  S cm is observed at 28 GPa, indicating potential applications for high performance photovoltaic candidates under extreme conditions.
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title Enhanced Structural Stability and Pressure-Induced Photoconductivity in Two-Dimensional Hybrid Perovskite (C 6 H 5 CH 2 NH 3 ) 2 CuBr 4
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