基于CsPbBr_(3)-MXene纳米结构的高线性度突触光电晶体管用于图像分类和边缘检测  

A high-linearity synaptic phototransistor based on CsPbBr_(3)-attached MXene nanostructures for image classification and edge detection tasks

作　　者：代岩 陈耿旭 黄伟龙 许晨晖 刘常飞 黄紫玉 郭太良 陈惠鹏 Yan Dai;Gengxu Chen;Weilong Huang;Chenhui Xu;Changfei Liu;Ziyu Huang;Tailiang Guo;Huipeng Chen(National&Local United Engineering Laboratory of Flat Panel Display Technology,Institute of Optoelectronic Display,College of Physics and Information Engineering,Fuzhou University,Fuzhou 350108,China;Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China,Fuzhou 350100,China)

机构地区：[1]National&Local United Engineering Laboratory of Flat Panel Display Technology,Institute of Optoelectronic Display,College of Physics and Information Engineering,Fuzhou University,Fuzhou 350108,China [2]Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China,Fuzhou 350100,China

出　　处：《Science China Materials》2024年第7期2246-2255,共10页中国科学（材料科学）（英文版）

基　　金：supported by the National Natural Science Foundation of China(62274035,62374033,U21A20497,61974029);National Key Research and Development Program of China(2022YFB3603803,2022YFB3603802);Natural Science Foundation of Fujian Province(2020J05104,2020J06012);Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China(2021ZZ129,2021ZZ130);Cooperation Project of Tianjin University&Fuzhou University Independent Innovation Fund(TF2023-10).

摘　　要：人工光突触为克服数据存储和处理中的冯诺依曼瓶颈,提供了一种有效的解决方案.人工光突触通过消除带宽连接密度的权衡和低功耗,展现了其相较于电突触的优势.钙钛矿量子点由于其易于合成和良好的光电性能,在人工光突触中引起了广泛的关注.然而,有限的载流子迁移率和非线性性能阻碍了它在神经形态中的应用.本研究提出了一种吸附CsPbBr_(3)的MXene纳米结构(CsPbBr_(3)-MXene),即在MXene纳米片上原位生长CsPbBr_(3)量子点,并将其作为光电突触晶体管的吸光层,CsPbBr_(3)和MXene形成的异质结构增强了光电流的产生.在相同的光脉冲刺激下,与仅含CsPbBr_(3)的突触晶体管相比,CsPbBr_(3)-MXene突触晶体管的兴奋性突触后电流(EPSC)提高了24.6%.经过计算和比较,其线性度有了明显的改善(从4.586到1.099);此外,其对手写数字分类的识别准确率也显著提高(从86.13%到92.05%);边缘检测的F1分数也有所提高(从0.8165到0.9065),更加接近于1.这些提升表明这项工作将有助于神经计算领域的进一步发展.Artificial photonic synapses offer an efficient solution for overcoming the von Neumann bottleneck in data storage and processing,providing advantages over electrical synapses by eliminating the bandwidth-connection-density tradeoff and exhibiting low power consumption.Perovskite quantum dots(QDs)have garnered significant attention in artificial photonic synapses due to their facile synthesis and favorable optoelectronic properties.However,challenges such as limited carrier mobility and nonlinearity impede their performance in neuromorphic applications.In this study,CsPbBr_(3)-attached MXene nanostructures(CsPbBr_(3)-MXene),in-situ growth of CsPbBr_(3) QDs on MXene nanosheets,were proposed as the light-absorbing layer of a synaptic phototransistor.The heterostructure formed by CsPbBr_(3) and MXene enhances photocurrent generation.Comparative analyses between CsPbBr_(3)-MXene synapse transistor and that containing only CsPbBr_(3) revealed a 24.6%higher excitatory postsynaptic current(EPSC)in the CsPbBr_(3)-MXene one under identical light pulse stimulation.Following calculations and comparisons,the linearity exhibited significant improvement,decreasing from 4.586 to 1.099.Furthermore,the recognition accuracy in handwritten digit classification notably increased,rising from 86.13%to 92.05%.Moreover,the F1 score in edge detection had improvement,advancing from 0.8165 to 0.9065,approaching closer to 1.These improvements have demonstrated substantial assistance in the field of neural computing.

关 键 词：in-situ growth CsPbBr_(3)-attached MXene synaptic phototransistor pattern recognition accuracy image preproces-sing 

分 类 号：TB383.1[一般工业技术—材料科学与工程] TN364.3[电子电信—物理电子学] TP391.41[自动化与计算机技术—计算机应用技术]