Fast-speed self-powered PEDOT: PSS/α-Ga2O3 nanorod array/FTO photodetector with solar-blind UV/visible dual-band photodetection

doi:10.1088/1674-1056/ac3814

中国物理B ›› 2022, Vol. 31 ›› Issue (4): 48501-048501.doi: 10.1088/1674-1056/ac3814

Fast-speed self-powered PEDOT: PSS/α-Ga₂O₃ nanorod array/FTO photodetector with solar-blind UV/visible dual-band photodetection

Ming-Ming Fan(范明明)^†, Kang-Li Xu(许康丽), Ling Cao(曹铃), and Xiu-Yan Li(李秀燕)

College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan 030024, China

收稿日期:2021-09-26 修回日期:2021-10-16 接受日期:2021-11-10 出版日期:2022-03-16 发布日期:2022-03-10
通讯作者: Ming-Ming Fan E-mail:fanmingming08@163.com
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 61705155).

Fast-speed self-powered PEDOT: PSS/α-Ga₂O₃ nanorod array/FTO photodetector with solar-blind UV/visible dual-band photodetection

Ming-Ming Fan(范明明)^†, Kang-Li Xu(许康丽), Ling Cao(曹铃), and Xiu-Yan Li(李秀燕)

College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan 030024, China

Received:2021-09-26 Revised:2021-10-16 Accepted:2021-11-10 Online:2022-03-16 Published:2022-03-10
Contact: Ming-Ming Fan E-mail:fanmingming08@163.com
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 61705155).

摘要/Abstract

摘要： The $\alpha $-Ga$_{2}$O$_{3}$ nanorod array is grown on FTO by hydrothermal and annealing processes. And a self-powered PEDOT:PSS/$\alpha $-Ga$_{2}$O$_{3}$ nanorod array/FTO (PGF) photodetector has been demonstrated by spin coating PEDOT:PSS on the $\alpha $-Ga$_{2}$O$_{3}$ 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 $\alpha $-Ga$_{2}$O$_{3}$ 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 $\beta $-Ga$_{2}$O$_{3 }$ 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/$\alpha $-Ga$_{2}$O$_{3}$ heterojunction. The results herein may prove a promising way to realize fast-speed self-powered $\alpha $-Ga$_{2}$O$_{3}$ photodetectors with solar-blind UV/visible dual-band photodetection by simple processes for the applications of multiple-target tracking, imaging, machine vision and communication.

关键词: fast speed, self powered, solar-blind UV/visible photodetection, PEDOT:PSS/α-Ga₂O₃/FTO

Abstract: The $\alpha $-Ga$_{2}$O$_{3}$ nanorod array is grown on FTO by hydrothermal and annealing processes. And a self-powered PEDOT:PSS/$\alpha $-Ga$_{2}$O$_{3}$ nanorod array/FTO (PGF) photodetector has been demonstrated by spin coating PEDOT:PSS on the $\alpha $-Ga$_{2}$O$_{3}$ 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 $\alpha $-Ga$_{2}$O$_{3}$ 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 $\beta $-Ga$_{2}$O$_{3 }$ 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/$\alpha $-Ga$_{2}$O$_{3}$ heterojunction. The results herein may prove a promising way to realize fast-speed self-powered $\alpha $-Ga$_{2}$O$_{3}$ photodetectors with solar-blind UV/visible dual-band photodetection by simple processes for the applications of multiple-target tracking, imaging, machine vision and communication.

Key words: fast speed, self powered, solar-blind UV/visible photodetection, PEDOT:PSS/α-Ga₂O₃/FTO

中图分类号: (Photodiodes; phototransistors; photoresistors)

85.60.Dw

73.40.Lq (Other semiconductor-to-semiconductor contacts, p-n junctions, and heterojunctions) 78.56.-a (Photoconduction and photovoltaic effects) 07.60.Rd (Visible and ultraviolet spectrometers)

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[J]. 中国物理B, 2022, 31(4): 48501-048501.

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Fast-speed self-powered PEDOT: PSS/α-Ga₂O₃ nanorod array/FTO photodetector with solar-blind UV/visible dual-band photodetection

Fast-speed self-powered PEDOT: PSS/α-Ga₂O₃ nanorod array/FTO photodetector with solar-blind UV/visible dual-band photodetection

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