Submillimeter and lead-free Cs3Sb2Br9 perovskite nanoflakes: inverse temperature crystallization growth and application for ultrasensitive photodetectors

Zhi Zheng; Qingsong Hu; Hongzhi Zhou; Peng Luo; Anmin Nie; Haiming Zhu; Lin Gan; Fuwei Zhuge; Ying Ma; Haisheng Song; Tianyou Zhai

doi:10.1039/C9NH00426B

Submillimeter and lead-free Cs₃Sb₂Br₉ perovskite nanoflakes: inverse temperature crystallization growth and application for ultrasensitive photodetectors†

Zhi Zheng,

‡^a Qingsong Hu,‡^b Hongzhi Zhou,‡^c Peng Luo,^a Anmin Nie,

^d Haiming Zhu,^c Lin Gan,

^a Fuwei Zhuge,

^a Ying Ma,

^a Haisheng Song^b and Tianyou Zhai

*^a

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* Corresponding authors

^a State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, Hubei, P. R. China
E-mail: zhaity@hust.edu.cn

^b Wuhan National Laboratory for Optoelectronics (WNLO) and School of Optical and Electronic Information, Huazhong University of Science and Technology (HUST), Wuhan 430074, Hubei, P. R. China

^c Centre for Chemistry of High-Performance and Novel Materials, Department of Chemistry and State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027, Zhejiang, P. R. China

^d Center for High Pressure Science, State Key Laboratory of Metastable Materials Science and Technology, Yanshan Unversity, Qinhuangdao 066004, Hebei, P. R. China

Abstract

Lead-free Cs₃Sb₂Br₉ perovskites demonstrate wide applications in photodetectors owing to their remarkable optical properties and nontoxicity. Herein, we utilized an inverse temperature crystallization strategy to synthesize submillimeter Cs₃Sb₂Br₉ perovskite nanoflakes. The carrier relaxation dynamics was investigated. Moreover, the Cs₃Sb₂Br₉ perovskite nanoflake device exhibits fast response speed, high responsivity and excellent detectivity.

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Submillimeter and lead-free Cs₃Sb₂Br₉ perovskite nanoflakes: inverse temperature crystallization growth and application for ultrasensitive photodetectors†

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Submillimeter and lead-free Cs₃Sb₂Br₉ perovskite nanoflakes: inverse temperature crystallization growth and application for ultrasensitive photodetectors

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