文献类型：期刊文献

英文题名：High-Performance UV-Visible Broad Spectral Phototransistors Based on CuPc/Cs₃Bi₂I₉ Heterojunction

作者：Wang, Yurui[1,2];Jiang, Benfu[1];Zhao, Xijun[3];Chen, Yuxing[2];Pan, Xinxin[1];Yu, Qing[4];Yao, Bo[2]

机构：[1]Zhuhai Coll Sci & Technol, Sch Elect & Informat Engn, Zhuhai 519041, Peoples R China;[2]Shaoxing Univ, Zhejiang Engn Res Ctr MEMS, Shaoxing 312000, Peoples R China;[3]Zhuhai South Integrated Circuit Design Ctr, Zhuhai 519041, Peoples R China;[4]United Nova Technol Co Ltd, Shaoxing 312000, Peoples R China

年份：2024

卷号：14

期号：8

外文期刊名：COATINGS

收录：SCI-EXPANDED(收录号：WOS:001307234500001)、、WOS

基金：This work was supported by the Zhejiang Province Public Welfare Technology Application Research Project (Grant No. LGG21F050001) and the Science and Technology Planning Project of Shaoxing City (No. 2023B41006).

语种：英文

外文关键词：Cs3Bi2I9; planar heterojunction; phototransistor; broad spectral; stability

外文摘要：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.