| Autor: |
Huizhen Yao, Fuming Chen, Lai Liu, Jinzhuo Xu, Congjian Lin, Zexiang Liu, Ke Jiang, Ye Wang, Feier Fang |
| Rok vydání: |
2020 |
| Předmět: |
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| Zdroj: |
RSC Advances. 10:20745-20752 |
| ISSN: |
2046-2069 |
| DOI: |
10.1039/d0ra01239d |
| Popis: |
The emerging metal-halide perovskites are promising for next generation optoelectronic devices. Recently, all-inorganic halide perovskites have been developed and show significantly improved stability compared with organic–inorganic hybrid halide perovskites. Here, we report a facile method based on the coffee ring effect of solvents to synthesize dual-phase CsPbBr3–CsPb2Br5 single crystal microsheets for the first time. The prepared dual-phase CsPbBr3–CsPb2Br5 single crystal is composed of a tetragonal crystalline phase of CsPb2Br5 and a monoclinic phase of CsPbBr3 according to X-ray diffraction (XRD) patterns. The sharp XRD peaks indicate the high crystallinity of the as-synthesized dual-phase CsPbBr3–CsPb2Br5 microsheets. CsPbBr3 is mainly distributed on the edge of the microsheets based on photoluminescence (PL) mapping images. Besides, a photodetector based on the dual-phase CsPbBr3–CsPb2Br5 microsheets exhibits good performance with a high on/off photocurrent ratio of 300 and a photoresponsivity of 2.68 mA W−1. The rise and decay times of the CsPbBr3–CsPb2Br5 microsheet photodetector are around 25.3 ms and 29.6 ms, respectively. The experimental results indicate that the dual-phase CsPbBr3–CsPb2Br5 microsheet could be a good candidate for the fabrication of high-performance micro photodetectors compatible with practical applications. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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