基于薄膜晶体管的铁电/驻极体协同有机光电突触  

Ferroelectric/electret Cooperative Organic Photoelectric Synapse Based on Thin Film Transistor

作　　者：李志达 赖秉琳 李博文 王弘禹 洪上超 张国成 LI Zhida;LAI Binglin;LI Bowen;WANG Hongyu;HONG Shangchao;ZHANG Guocheng(Microelectronics Technology Research Center,Fujian University of Science andTechnology,Fuzhou 350108,China;School of Mathematics and Information Engineering,Longyan University,Longyan 364012,China)

机构地区：[1]福建理工大学微电子技术研究中心,福州350108 [2]龙岩学院数学与信息工程学院,龙岩364012

出　　处：《光子学报》2024年第7期227-234,共8页Acta Photonica Sinica

基　　金：福建省自然科学基金面上项目(No.2021J011082),福建工程学院校科研启动基金(No.GY-Z20041)。

摘　　要：基于薄膜晶体管结构,在铁电突触晶体管的基础上,增加了驻极体这一功能层,制备出一种铁电/驻极体突触晶体管。与传统的铁电突触晶体管相比,其开关比增大了一个数量级,阈值电压减少了10 V。薄膜表面的均方根粗糙度从2.95 nm降到0.66 nm,有利于载流子的传输。同时,在不同颜色的光照下,该器件呈现出4种不同的突触状态,多级光电突触的功能使其有望降低神经网络的复杂性。In recent years,the level of computerisation in society has increased significantly,resulting in a surge in demand for data processing.Consequently,traditional computing technologies based on Von Neumann architectures are encountering limitations.The separation of processors and storage units in traditional computers makes them less efficient and power-efficient when processing large amounts of data.Biological neural network computing presents a potential alternative solution to the Von Neumann bottleneck.Neuromorphic computing at the physical level relies on synaptic devices that mimic the function of biological synapses in neural networks.Significant progress has been made in artificial synaptic devices,such as phase-change memories,amnesia,and field-effect transistors.Organic thin-film transistors are currently a popular research topic due to their simple manufacturing process and low cost.In contrast to inorganic thin-film transistors,which require fabrication under high vacuum and high temperature conditions,organic electronic devices only require the formulation of organic materials into a solution for thin-film processing and annealing below 200 degrees Celsius.This reduces equipment requirements and manufacturing costs.To improve the simulation of synaptic function in thin film transistors,researchers have added a functional layer between the insulation and semiconductor layers.Various synaptic transistors have been prepared by combining materials with different properties.The three most common types of synaptic transistors are electret,ferroelectric,and floating gate,classified based on their functional layer.Ferroelectric synaptic transistors are a popular research topic among artificial synaptic devices due to the plasticity of their polarisation,which closely resembles that of biological synapses.However,the retention time of these ferroelectric synapses is short due to the gradual decrease of the ferroelectric polarization state over time.The rough ferroelectric film results in poor interface charact

关 键 词：人工突触 薄膜晶体管 铁电突触晶体管 驻极体 光电突触。 

分 类 号：TN321.5[电子电信—物理电子学]