Frontiers of Optoelectronics, Volume. 15, Issue 4, 12200(2022)
Dark current modeling of thick perovskite X-ray detectors
Metal halide perovskites (MHPs) have demonstrated excellent performances in detection of X-rays and gamma-rays. Most studies focus on improving the sensitivity of single-pixel MHP detectors. However, little work pays attention to the dark current, which is crucial for the back-end circuit integration. Herein, the requirement of dark current is quantitatively evaluated as low as 10-9 A/cm2 for X-ray imagers integrated on pixel circuits. Moreover, through the semiconductor device analysis and simulation, we reveal that the main current compositions of thick perovskite X-ray detectors are the thermionic-emission current (JT) and the generation-recombination current (Jg-r). The typical observed failures of p–n junctions in thick detectors are caused by the high generation-recombination current due to the band mismatch and interface defects. This work provides a deep insight into the design of high sensitivity and low dark current perovskite X-ray detectors.
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Shan Zhao, Xinyuan Du, Jincong Pang, Haodi Wu, Zihao Song, Zhiping Zheng, Ling Xu, Jiang Tang, Guangda Niu. Dark current modeling of thick perovskite X-ray detectors[J]. Frontiers of Optoelectronics, 2022, 15(4): 12200
Category: RESEARCH ARTICLE
Received: Jun. 14, 2022
Accepted: Jul. 17, 2022
Published Online: Jan. 22, 2023
The Author Email: Niu Guangda (guangda_niu@hust.edu.cn)