光门控效应调控光电探测器响应特性研究进展
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中图分类号： TN304 文献标识码： ADOI：10. 37188/CJL. 20250004 CSTR：32170. 14. CJL. 20250004
Research Progress on Photogating Effect in Regulating Response Characteristics of Photodetectors
LIU Hao1，SONG Hongwei2*，CHEN Cong1* （1. School of Material Science and Engineering，Hebei University of Technology，Tianjin 300401，China； 2. State Key Laboratory of Integrated Optoelectronics，College of Electronic Science and Engineering，Jilin University， Changchun ，China） * Corresponding Authors，E-mail：songhw@jlu. edu. cn；chencong@hebut. edu. cn
Abstract：The performance of photodetectors is determined by various parameters，including light absorption efficiency，sensitivity，and accuracy，all of which are influenced by multiple photoelectric conversion effects such as the photovoltaic，photoconductive，pyroelectric，photothermal，and photogating effects. The photogating effect refers to the phenomenon in which some of the photogenerated charge carriers in the photosensitive material are trapped and enter trap states upon light exposure，subsequently affecting the charge carrier transport proper⁃ ties within the conductive channel of the photodetector. This paper reviews the photogating effect and its role in enhancing photodetector performance. It begins with an introduction to the basic principles of the photogating ef⁃ fect，followed by a discussion of its impact on photodetector performance，including gain，bandwidth，responsivi⁃ ty，response time，and transfer characteristics. The photogating effect primarily enhances the sensitivity，dynam⁃ ic range，and signal-to-noise ratio of photodetectors to weak light signals by modulating the output electrical signal in response to incident light. In particular，this paper emphasizes the application of the photogating effect in low-dimensional materials-based photodetectors，such as nanowires，graphene，and other two-dimensional materials. Finally，the potential applications of the photogating effect in perovskite photodetectors are explored， and future research directions are proposed.
Key words：photogating effect；gain；responsivity；low-dimensional materials；perovskite
1 引 言
光电探测器是一种将光信号转化为电信号的设备，广泛应用于光通信、激光雷达、光学测量等领域[1-5]。（剩余32481字）
