Volume 15 Issue 4
Jul.  2022
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QU Jia-yi, WANG Yun-peng, SUN Jun-jie, CHEN Fei, ZHAO Dong-xu, TIAN Can-can. Analysis of photoelectric characteristics of a light-damaged schottky perovskite detector[J]. Chinese Optics, 2022, 15(4): 668-674. doi: 10.37188/CO.2021-0196
Citation: QU Jia-yi, WANG Yun-peng, SUN Jun-jie, CHEN Fei, ZHAO Dong-xu, TIAN Can-can. Analysis of photoelectric characteristics of a light-damaged schottky perovskite detector[J]. Chinese Optics, 2022, 15(4): 668-674. doi: 10.37188/CO.2021-0196

Analysis of photoelectric characteristics of a light-damaged schottky perovskite detector

doi: 10.37188/CO.2021-0196
Funds:  Supported by Innovative Cross Team of the Chinese Academy of Sciences (No. JCTD-2020-13); National Natural Science Foundation of China (No. 11874352, No. 61805237), Innovation Project of Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences (No. E10302Y3M0)
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  • To understand the effects of femtosecond lasers on the optical performance of the photodetectors, the damage characteristics of a CsPbBr3 back-to-back Schottky photodetector irradiated by femtosecond pulses and its photoelectric performance under various laser energy densities were evaluated. A CsPbBr3 microcrystal film on the ITO interdigital electrode was deposited by chemical vapor deposition and a back-to-back Schottky type all-inorganic perovskite photodetector was prepared. The CsPbBr3 photodetector was irradiated by a Ti:Sapphire femtosecond laser with a pulse width of 35 fs. The damage morphology of the CsPbBr3 polycrystalline film under different laser energy densities was observed using a microscope, and the photoelectric performance of the Schottky-structure perovskite photodetector damaged under different energy densities was evaluated. Results suggest that the damage threshold of the self-made all-inorganic metal halide Schottky photodectector is as high as 2.1 W/cm2, and when the sample is slightly damaged, the photoelectric characteristics of the sample are improved to a certain extent and the spectral responsivity is broadened by 50 nm. As part of the film is heated off, the sample still maintains a certain level of detection performance.

     

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