文献类型：期刊文献

英文题名：Dual-functional organic/perovskite heterojunction phototransistors enabling wide-spectrum detection and synaptic plasticity emulation

作者：Wang, Yurui[1,2];Chen, Yuxing[1];Lin, Wei[1];Yao, Bo[1];Wang, Wenhao[1];Liu, Shiyan[1];Yao, Zhiyao[1];Li, Yan[1];Luo, Xiao[2];Fang, Zebo[1]

机构：[1]Shaoxing Univ, Zhejiang Engn Res Ctr MEMS, Shaoxing 312000, Peoples R China;[2]Univ Elect Sci & Technol China UESTC, Sch Optoelect Sci & Engn, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 610054, Peoples R China

年份：2025

卷号：200

外文期刊名：MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING

收录：SCI-EXPANDED(收录号：WOS:001567888300002)、、EI(收录号：20253419034213)、Scopus(收录号：2-s2.0-105013751776)、WOS

基金：In this work, a PT/PST based on F16CuPc/CBI heterojunction with dual functions of broadband photodetection and optoelectronic synapse was fabricated via full vacuum evaporation. Benefiting from the excel-lent light absorption & the high exciton dissociation efficiency of F16CuPc/CBI heterojunction, and the significant photomultiplication effect from the organic thin-film and the disordered molecular-stacking heterojunction interface via vacuum-evaporated. The F16CuPc/CBI-PT shows outstanding photodetection performance under visible light and near-infrared light illumination, with the Rmax of 1.12 x102(84/98) A/ W, EQEmax of 3704.39 % (1887.41 %/1812.38 %), and Dmax* of 2.25 x1013 (1.68 x1013/1.98 x1013) Jones under 450 nm (660/808 nm) light illumination. It also has a lower detection limit of 20 mu W/cm2 and a wide LDR of 54 dB. Furthermore, we investigated the ability of F16CuPc/CBI- PST to mimic several biological neural synaptic behaviors under optical and electrical stimulation. The device successfully achieve neura synaptic characteristics like LTP, PPF, and learning-forgetting-relearning, as well as simulating the Pavlov's dog experiment. This work proves that the preparation of F 16 CuPc/CBI heterojunction PT/PST by full vacuum evaporation can not only achieve high performance wide spectrum detection, but also has great potential in future biological vi-sual information perception, associative memory learning and digital signal processing.This work was supported by the National Natural Science Foundation of China (No. 62274024) , the Zhejiang Province Public Welfare Tech-nology Application Research Project (Grant No. LGG21F050001) , Sichuan Science and Technology Program (2024NSFSC0232) and the Xiaomi Young Scholars Fellowship.

语种：英文

外文关键词：Associative processing - Associative storage - Bismuth compounds - Cesium compounds - Dissociation - Efficiency - Excitons - Heterojunctions - Infrared detectors - Interfaces (materials) - Iodine compounds - Lead compounds - Perovskite - Photons - Platinum - Vacuum evaporation

外文摘要：This article presents an n-type phototransistor (PT) with dual functionalities of broadband photodetection and optoelectronic synaptic behavior. The PT is based on a planar heterojunction of lead-free perovskite Cs3Bi2I9 and the organic small molecule F16CuPc, fabricated through full vacuum evaporation. The device leverages the strong light absorption and high exciton dissociation efficiency of the F16CuPc/Cs3Bi2I9 heterojunction, alongside a significant photomultiplication effect from the vacuum-evaporated organic thin film and its disordered molecular-stacking interface. This results in exceptional photodetection performance under visible and near- infrared illumination, achieving a maximum photoresponsivity of 1.12 x10(2) A/W, an external quantum efficiency of up to 3704.39 %, and a specific detectivity of 2.25 x10(13) Jones at 450 nm. The PT also features a low detection limit of 20 mu W/cm(2) and a wide linear dynamic range of 54 dB. Moreover, the study explores the device's ability to mimic key biological neural synaptic behaviors, such as long-term plasticity, paired-pulse facilitation, and learning-forgetting-relearning processes, under optical and electrical stimulation. Notably, it successfully replicates the behavior observed in the Pavlovian dog experiment. This work demonstrates that the full vacuum evaporation method for fabricating F16CuPc/Cs3Bi2I9 heterojunction PTs and photosynaptic transistors (PSTs) not only enables high-performance, broad- spectrum detection but also holds significant promise for applications in bio-inspired visual information processing, associative memory learning, and digital signal processing.