基于可加速学习有机薄膜晶体管的视觉图像预处理的研究  

Visual Image Preprocessing Based on Accelerated Learning Organic Thin Film Synaptic Transistor

作　　者：代岩 陈耿旭 DAI Yan;CHEN Gengxu(National&Local United Engineering Laboratory of Flat Panel Display Technology,College of Physics and Information Engineering,Fuzhou University,Fuzhou 350108,China)

机构地区：[1]福州大学物理与信息工程学院平板显示技术国家地方联合工程实验室,福建福州350108

出　　处：《电视技术》2024年第5期72-78,85,共8页Video Engineering

摘　　要：图像在传输和显示过程中,由于噪声、特征衰减等原因会造成不同程度的图像质量下降问题,导致信息的错误传递,因此通过图像预处理来改善图像质量及提取图像特征十分必要。除了需要图像采集,还需要人脑对图像进行信息处理。神经形态显示器件作为可以模拟人脑中的神经元突触,具有传输快、抗干扰能力强等诸多优点,被认为是神经形态领域中有价值的组成部分。提出二维材料Ti3C2TxMXene纳米片与钙钛矿量子点共混(CsPbBr3/MXene)形成的异质结结构增强了光电流的产生,并结合有机半导体材料PDVT-10优异的载流子迁移率制备的有机薄膜突触晶体管,成功模拟了生物突触的兴奋性突触后电流(Excitatory Post-Synaptic Current,EPSC)、双脉冲易化(Paired-Pulse Facilitation,PPF)等基本功能。在相同的光脉冲刺激下,相较于纯CsPbBr3突触晶体管,CsPbBr3/MXene突触晶体管的单脉冲EPSC与多脉冲EPSC峰值分别达到148%与157.6%的巨幅提升,实现了在相同时间内从短期可塑性(Short-Term Plasticity,STP)到长期可塑性(Long-Term Plasticity,LTP)的快速转化。In the process of image transmission and display,due to noise,feature attenuation and other reasons,the image quality will be degraded to different degrees,resulting in the wrong transmission of information.It is very important to improve image quality and extract image features through image preprocessing.In addition to image acquisition,the human brain also needs to process the image information.Neuromorphic display devices,which can simulate the synapses in human brain,have many advantages such as fast transmission and strong anti-interference ability,and are considered as valuable components in the field of neuromorphic display.In this paper,it is proposed that the heterojunction structure formed by the blending of two-dimensional material Ti3C2Tx MXene nanosheet and perovskite quantum dots(CsPbBr3/MXene)enhances the generation of photocurrent,and the organic thin film synaptic transistor is prepared by combining the excellent carrier mobility of organic semiconductor material PDVT-10.The basic functions of biological synapses,such as Excitatory Post-Synaptic Current(EPSC)and Paired Pulse Facilitation(PPF),were successfully simulated.Under the same light pulse stimulation,compared with pure CsPbBr3 synaptic transistor,the peak value of monopulse EPSC and multi-pulse EPSC of CsPbBr3/MXene synaptic transistor reaches 148%and 157.6%,respectively.Rapid transformation from Short-Term Plasticity(STP)to Long-Term Plasticity(LTP)was achieved in the same time.

关 键 词：有机薄膜晶体管 加速学习 图像预处理 

分 类 号：TN321.5[电子电信—物理电子学]