Abstract The -GaO nanorod array is grown on FTO by hydrothermal and annealing processes. And a self-powered PEDOT:PSS/-GaO nanorod array/FTO (PGF) photodetector has been demonstrated by spin coating PEDOT:PSS on the -GaO nanorod array. Successfully, the PGF photodetector shows solar-blind UV/visible dual-band photodetection. Our device possesses comparable solar-blind UV responsivity (0.18 mA/W at 235 nm) and much faster response speed (0.102 s) than most of the reported self-powered -GaO nanorod array solar-blind UV photodetectors. And it presents the featured and distinguished visible band photoresponse with a response speed of 0.136 s at 540 nm. The response time is also much faster than the other non-self-powered -GaO DUV/visible dual-band photodetectors due to the fast-speed separation of photogenerated carries by the built-in electric field in the depletion regions of PEDOT:PSS/-GaO heterojunction. The results herein may prove a promising way to realize fast-speed self-powered -GaO photodetectors with solar-blind UV/visible dual-band photodetection by simple processes for the applications of multiple-target tracking, imaging, machine vision and communication.
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 61705155).
Corresponding Authors:
Ming-Ming Fan
E-mail: fanmingming08@163.com
Cite this article:
Ming-Ming Fan(范明明), Kang-Li Xu(许康丽), Ling Cao(曹铃), and Xiu-Yan Li(李秀燕) Fast-speed self-powered PEDOT: PSS/α-Ga2O3 nanorod array/FTO photodetector with solar-blind UV/visible dual-band photodetection 2022 Chin. Phys. B 31 048501
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