材料科学
光电子学
异质结
光电流
光电二极管
光电探测器
光敏性
可见光谱
光刻胶
钙钛矿(结构)
化学
结晶学
作者
Yurui Wang,Benfu Jiang,Xijun Zhao,Yuxing Chen,Xinxin Pan,Qing Yu,Bo Yao
出处
期刊:Coatings
[MDPI AG]
日期:2024-08-02
卷期号:14 (8): 966-966
标识
DOI:10.3390/coatings14080966
摘要
Phototransistors are three-terminal photodetectors that usually have a higher photocurrent gain than photodiodes due to the amplification of the gate electrode. In this work, a broad spectral phototransistor based on copper phthalocyanine (CuPc) and a Cs3Bi2I9 (CBI) heterojunction is fabricated by the full vacuum evaporation method. Due to the complementary UV–visible absorption of CuPc and CBI, the device exhibits superior performance under three different types of visible light illumination. The experimental results show that the structure of the organic/perovskite heterojunction active layer has the characteristics of good compatibility and a simple process. Meanwhile, by utilizing the superior light-absorption characteristics of perovskite materials and the strong exciton dissociation efficiency of a hetero-type heterojunction interface, the CuPc/CBI-PT exhibits a higher photoresponsivity, photosensitivity, specific detection rate, and lower operating voltage than the CuPc reference device. The stability test shows that the CuPc/CBI-PT can still obtain a 0.73 A/W photoresponsivity under 660 nm light illumination after being stored in the air for 360 h without any packaging. This indicates that the organic/perovskite heterojunction PT may be a good choice for the preparation of high-performance photodetectors.
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