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31 January 2023 Two-dimensional modeling of the saturation characteristics of laser irradiation on HgCdTe mid-wave infrared photovoltaic devices
Maosheng Sang, Fan Yang, Guoqing Xu, Hui Qiao, Xiaoyang Yang, Xiangyang Li, Pengling Yang, Dahui Wang
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Proceedings Volume 12505, Earth and Space: From Infrared to Terahertz (ESIT 2022); 125050G (2023) https://doi.org/10.1117/12.2665517
Event: Earth and Space: From Infrared to Terahertz (ESIT 2022), 2022, Nantong, China
Abstract
The laser response of HgCdTe medium-wave photovoltaic device is numerically simulated in this research. The simulations are carried out by considering the carrier electrical properties and a simulation model is obtained, and simulation results are in general conformity with the experimental results under both strong and weak illumination. The saturation threshold increases as the operating temperature of the device decreases, according to the current response characteristics of the device. The contact resistance of device is calculated and discussed, and the optimized device structure are given to point out the direction of parameter optimization. Furthermore, two-dimensional simulations demonstrate that the electrode size and composition gradient and reverse voltage has a considerable impact on the photocurrent, which is an essential problem to address in the development of high saturation threshold mid-wave infrared HgCdTe photovoltaic devices.
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Maosheng Sang, Fan Yang, Guoqing Xu, Hui Qiao, Xiaoyang Yang, Xiangyang Li, Pengling Yang, and Dahui Wang "Two-dimensional modeling of the saturation characteristics of laser irradiation on HgCdTe mid-wave infrared photovoltaic devices", Proc. SPIE 12505, Earth and Space: From Infrared to Terahertz (ESIT 2022), 125050G (31 January 2023); https://doi.org/10.1117/12.2665517
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KEYWORDS
Mercury cadmium telluride
Laser irradiation
Electrodes
Laser damage threshold
Doping
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