Bi2O3/Bi2S3 异质结材料的制备及其光电探测性能研究
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中图分类号：TN36 文献标志码：A doi： 10.37188/CO.2024-0218 CSTR：32171.14.CO.2024-0218
Bi2O3/Bi2S3 heterojunction composite preparation and photodetection performance
FANG Xiang-ming1， ZHANG Rong- ⋅ke2 ， SUN Yu²， WU Wei-yu1， ZHU Jian-hua 1 YOU Xiu-fen1， GAO Shi-yong² *
（1.Department ofMaterials and Chemical Engineering，Taiyuan University， Taiyuan O3o032，China;
2.School ofMaterials Science and Engineering，Harbin Institute ofTechnology，Harbin 15ooo1，China） * Corresponding author， E -mail： gaoshiyong@hit.edu.cn
Abstract： The Bi2O3/Bi2S3 heterojunction composite was prepared by thermal polymerization combined with room temperature solution method，and its micromorphology， crystal structure and elemental composition were characterized. The results demonstrate that the Bi2O3/Bi2S3 heterojunction composite exhibits a bulk morphology， accompanied by the presence of pores and a relatively rough surface. Based on the Bi2O3/Bi2S3 heterojunction composite，the photodetector was fabricated and its photodetection performance was measured under zero bias voltage. When exposed to ultraviolet （UV） light， the maximum photocurrent （0.32μA） （2 and response speed （ 65.65/80.56ms ）of the Bi2O3/Bi2S3 photodetector are significantly enhanced compared to those of the Bi2O3 photodetector. In addition， the device exhibits a wide photodetection band from the UV to the visible （Vis） spectrum，as well as fast and stable self-driven photodetectioncapability.This is mainly attributed the successful coupling of Bi2O3 and Bi2S3 with a narrow band gap， resulting in the formation of a heterojunction composite that exhibits a type II band structure. It is noteworthy that the photodetection performance of the device was measured by continuously alternating between blue light on and off for 100 times. This indicates that the Bi2O3/Bi2S3 photodetector exhibits excellent cycle stability.
Key words： Bi2O3 Bi2S3 ; photodetector; heterojunction
1引言
近年来，光电探测器在民用、工业以及国防等领域都得到了广泛应用，例如医疗成像，火警监测，通信系统和导弹制导等[1-2]。（剩余12303字）
