@article{Pan2024, 
author = {Xiyan Pan and Tai An and Jie Sun and Hua Dong and Zhu Ma and Guangxing Liang and Yongbo Yuan and Yang Li and Wuqiang Wu and Yong Ding and Liming Ding},
title = {Thermodynamically induced crystal restructuring to make CsPbCl3 single crystal films for weak light detection},
year = {2024},
journal = {Nano Research},
volume = {17},
number = {11},
pages = {9775-9783},
keywords = {photodiode, single crystal film, crystal restructuring, ultraviolet detector, CsPbCl3},
url = {https://www.sciopen.com/article/10.1007/s12274-024-6967-9},
doi = {10.1007/s12274-024-6967-9},
abstract = {CsPbCl3 perovskite is considered a highly promising material for ultraviolet (UV) photodetectors due to its exceptional thermal stability and excellent short-wavelength light response. However, its high lattice energy and low polarizability result in extremely low solubility in conventional solvents, making the synthesis of CsPbCl3 single crystals a significant challenge. In this study, we propose a novel thermodynamically induced crystal restructuring (TICR) process that can transform microcrystalline films (MCFs) into single crystal films (SCFs) within a short period. This method, for the first time, has successfully achieved the synthesis of centimeter-sized CsPbCl3 SCFs and the mechanism has been explored in depth using in-situ techniques. Furthermore, we report the first instance of a CsPbCl3 SCF UV photodiode, which exhibits a record-breaking on/off ratio of 3.32 × 107 and a detectivity of up to 1.15 × 1014 Jones under 0 V bias. It demonstrates excellent response even under weak light conditions of 10 nW·cm−² and maintains outstanding stability with almost no performance degradation after 15 months. This study provides a novel approach for the synthesis of perovskite single crystals and holds significant potential for advancing the development of high-performance optoelectronic devices.}
}