Self-Powered a-SnO x /c-Ga 2 O 3 Pn Heterojunction Solar-Blind Photodetector With High Responsivity and Swift Response Speed

作者：Yan Zeng, Hong Huang, Xiaolong Zhao, Mengfan Ding, Xiaohu Hou, Yanni Zou, Jiahong Du, Jinyang Liu, Shunjie Yu, Keju Han, Yonghui Wu, Xuanze Zhou, Guangwei Xu, Shibing Long · 发表于：IEEE Electron Device Letters · 年份：2023 · DOI：10.1109/led.2023.3325228 · 被引用次数：27 · 研究领域：Ga2O3 and related materials、ZnO doping and properties、Electronic and Structural Properties of Oxides

In this letter, the self-powered solar-blind photodetector based on amorphous (a-) SnOx/crystalline (c-) Ga2O3 pn heterojunction with swift response speed has been successfully demonstrated. Increased hole concentration in a-SnOx by enhanced Sn2+ component under annealing improves the self-powered photoresponse performance. A highly precise test scheme without external supply captures the intrinsically swift response speed. The photodetector exhibits an impressive rise/decay time of 0.18/1.04 ms and responsivity of 7.08 A/W at 0 V bias, ranking into the top tier in all self-powered Ga2O3 photodetectors. This study provides a referenceable self-powered detector structure with amorphous/crystalline pn heterojunction.