文献类型：期刊文献

英文题名：Negative and Positive Bipolar Photoresponse of CsPbBr3/MoSe2 Heterostructure

作者：Chang, Xi[1];Chang, Shuqing[1];Zhao, Zhen[1];Shao, Qi[1];Li, Daozheng[1];Zhang, Minwei[1];Xuan, Xiaoyang[2];Niu, Yueping[1];Gong, Shangqing[1,3,4];Qian, Min[1]

机构：[1]East China Univ Sci & Technol, Sch Phys, Shanghai, Peoples R China;[2]Taishan Univ, Coll Chem & Chem Engn, Tai An, Shandong, Peoples R China;[3]Shanghai Frontiers Sci Ctr Optogenet Tech Cell Met, Shanghai, Peoples R China;[4]Shanghai Engn Res Ctr Hierarch Nanomat, Shanghai 200237, Peoples R China

年份：2026

外文期刊名：ADVANCED FUNCTIONAL MATERIALS

收录：;EI(收录号：20261120260292);WOS:【SCI-EXPANDED(收录号:WOS:001713231800001)】；

基金：This work is supported by the Space Application System of China Manned Space Program, National Natural Science Foundation of China (Grant No. 12575275), and the Undergraduate Training Program on Innovation and Entrepreneurship (Grant No. X202510151257).

语种：英文

外文关键词：co-evaporation; heterostructure; perovskite; photodetector; two-dimensional transition metal chalcogenide

摘要：It is relatively mature to construct positive photoresponse devices nowadays, and there are also a variety of construction strategies for the novel negative photoresponse devices. However, this unipolar photoresponse photodetectors limit their applications in the field of optoelectronics, such as optical logic gates. In this work, we report a CsPbBr3/MoSe2 semiconductor heterojunction photodetector with negative and positive bipolar photoresponse to different visible light bands. With the help of high transparency above 550 nm and the interfacial defects of co-evaporated CsPbBr3, the type-I CsPbBr3/MoSe2 semiconductive heterostructure shows a negative photoresponse from 340 to 520 nm, with a responsivity of -2.15 A W-1 at 340 nm, and a positive photoresponse above 550 nm, with a responsivity of 19.69 A W-1 at 580 nm, and its application potentials in optical logic device based on the balanced ternary system has been demonstrated. The bipolar photoresponse designed in this work cleverly makes the usages of the optical transparency and defects of CsPbBr3 perovskite material, the type-I heterostructure benefiting the exciton recombination, and the two-dimensional MoSe2 serving as a broad band carrier transport layer, which opens up a new strategy for designing the bipolar photoresponse devices, revealing application potentials in the logic ternary system.