Dye-sensitized perovskite/organic semiconductor ternary transistors for artificial synapses  

用于人工突触的染料敏化钙钛矿/有机半导体三元晶体管

作　　者：Xin Wang Dandan Hao Jia Huang 王鑫;郝丹丹;黄佳(School of Materials Science and Engineering,Interdisciplinary Materials Research Center,Frontiers Science Center for Intelligent Autonomous Systems,Tongji University,Shanghai 201804,China;Translational Research Institute of Brain and Brain-Like Intelligence,Shanghai Fourth People’s Hospital Affiliated to Tongji University,School of Materials Science and Engineering,Tongji University,Shanghai 200434,China)

机构地区：[1]School of Materials Science and Engineering,Interdisciplinary Materials Research Center,Frontiers Science Center for Intelligent Autonomous Systems,Tongji University,Shanghai 201804,China [2]Translational Research Institute of Brain and Brain-Like Intelligence,Shanghai Fourth People’s Hospital Affiliated to Tongji University,School of Materials Science and Engineering,Tongji University,Shanghai 200434,China

出　　处：《Science China Materials》2022年第9期2521-2528,共8页中国科学（材料科学（英文版）

基　　金：supported by the National Natural Science Foundation of China(62074111);the Science&Technology Foundation of Shanghai(20JC1415600 and 19JC1412402);Shanghai Municipal Science and Technology Major Project(2021SHZDZX0100);Shanghai Municipal Commission of Science and Technology Project(19511132101);the Fundamental Research Funds for the Central Universities。

摘　　要：Artificial intelligence(AI)is attractive due to its brain-like working pattern and efficient task processing.Light-stimulated synaptic devices show enormous potential in the field of neuromorphic computing.Here,we develop a kind of optical synaptic devices with a ternary photoactive material system consisting of organometal halide perovskite CHNH-PbBr,organic dye Rhodamine B(RhB),and organic semiconductor pentacene.We found that the introduction of RhB can significantly improve the light absorption and photoresponsivity of the composite devices.The devices exhibit acceptable synaptic behaviors and realize a brain-like learning pattern toward various input signals.Notably,the devices can respond to light signals with a low intensity of 1.1μW cm^(-2)and be operated at low working voltages.The devices achieve a low energy consumption of 1.25 fJ at a drain-source voltage of-50μV,comparable to that of a biological synaptic event.Moreover,the devices simulate a self-learning process,indicating their significantly improved learning efficiency.Also,the devices can recognize subtle differences in Morse codes,showing potential in the practical application of information encryption.The excellent optoelectronic performance demonstrates that the proposed ternary synaptic devices are advantageous in developing new AI.人工智能因其类脑工作模式和高效任务处理能力而受到广泛关注.光刺激突触器件在神经形态计算领域应用潜力巨大.本文报道了具有三元光敏材料体系的光刺激突触器件,该体系由有机金属卤化物钙钛矿CHNHPbBr、有机染料罗丹明B和有机半导体并五苯组成.我们发现,通过引入罗丹明B,复合器件的光吸收和光响应性能得到显著提升.通过调整输入信号,复合器件表现出了良好的仿真学习行为.并且,这些器件可对强度低至1.1μW cm^(-2)的光信号响应,并能在低电压下进行工作.器件在-50μV的源漏电压下实现了1.25 fJ的超低功耗,这一能量损耗与单次生物突触活动的能耗相当.此外,复合突触器件还实现了自我学习过程,表现出了良好的学习效率.同时,它们可识别不同摩斯电码之间的细微差别,未来可应用于加密信息解码领域.本文所提出的三元突触器件拥有优异的光性能,在开发人工智能方面具有广泛的应用前景.

关 键 词：perovskites Rhodamine B organic semiconductors synapses artificial intelligence 

分 类 号：TB34[一般工业技术—材料科学与工程] TN32[电子电信—物理电子学] TP18[自动化与计算机技术—控制理论与控制工程]