Laser & Optoelectronics Progress, Volume. 59, Issue 11, 1104001(2022)
Preparation and Photodetection Performance of Self-Powered Bi2O2Se/TiO2 Heterojunction Ultraviolet Detectors
In this paper, Bi2O2Se/TiO2 heterostructures different mass fractions were synthesized by one-step hydrothermal method and characterized by X-ray diffraction, scanning electron microscopy and transmission electron microscopy, and the ultraviolet detector based on Bi2O2Se/TiO2 heterojunction was prepared. The experimental results show that the photodetection performance of Bi2O2Se/TiO2 heterojunction detector is the best when the mass fraction of Bi2O2Se is 60% under 365 nm ultraviolet light. The photocurrent of Bi2O2Se/TiO2 heterojunction is 7 times that of TiO2 detector and higher than that of Bi2O2Se detector. The response time is about 30 ms, which is 1/6 of that of TiO2 detector. The responsivity and detectivity are 10-3 A/W and 1.08×107 cm·Hz1/2/W, respectively, which are also one order of magnitude higher than that of TiO2 detector. This is mainly because the heterojunction formed by the combination of Bi2O2Se and TiO2 promotes the separation of photogenerated electrons and holes.
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Xiangyu Zhang, Yutian Chen, Zhi Zeng, Bingke Zhang, Chenchen Zhao, Shuai Ren, Ping Rong, Shiyong Gao, Dongbo Wang, Shujie Jiao, Jinzhong Wang. Preparation and Photodetection Performance of Self-Powered Bi2O2Se/TiO2 Heterojunction Ultraviolet Detectors[J]. Laser & Optoelectronics Progress, 2022, 59(11): 1104001
Category: Detectors
Received: Aug. 18, 2021
Accepted: Sep. 17, 2021
Published Online: Jun. 9, 2022
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