Two-dimensional reconfigurable electronics enabled by asymmetric floating gate  

作　　者：Tengyu Jin Jing Gao Yanan Wang Yue Zheng Shuo Sun Lei Liu Ming Lin Wei Chen 

机构地区：[1]Joint School of National University of Singapore and Tianjin University,International Campus of Tianjin University,Fuzhou 350207,China [2]Department of Physics,National University of Singapore,Singapore 117542,Singapore [3]State Key Laboratory of Luminescence and Applications,Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China [4]Institute of Materials Research and Engineering(IMRE),Agency of Science,Technology,and Research(A*STAR),Singapore 138634,Singapore [5]Department of Chemistry,National University of Singapore,Singapore 117543,Singapore [6]National University of Singapore(Suzhou)Research Institute,Suzhou 215123,China

出　　处：《Nano Research》2022年第5期4439-4447,共9页纳米研究（英文版）

基　　金：Authors acknowledge the financial support from the National Natural Science Foundation of China(Nos.U2032147,21872100,and 11727902);Ministry of Education(MOE),Singapore(No.MOE-T2EP50220-0001);the Science and Engineering Research Council of A*STAR(Agency for Science,Technology,and Research)Singapore(No.A20G9b0135).

摘　　要：Reconfigurable devices with customized functionalities hold great potential in addressing the scaling limits of silicon-based field-effect transistors(FETs).The conventional reconfigurable FETs are limited to the applications in logic circuits,and the commonly used multi-gate programming strategies often lead to high power consumption and device complexity.Here,we report a reconfigurable WSe_(2) optoelectronic device that can function as photodiode,artificial synapse,and 2-bit memory in a single device,enabled by an asymmetric floating gate(AFG)that can continuously program the device into different homojunction modes.The lateral p-n homojunction formed in the AFG device exhibits high-performance self-powered photodetection,with a responsivity over 0.17 A·W^(-1) and a wide detection spectral range from violet to near-infrared region.The AFG device can also mimic synaptic features of biological synapses and achieve distinct potentiation/depression behaviors under the modulation of both drain-source bias and light illumination.Moreover,when working as a 2-bit memory via the transition between n-n+and p-n homojunctions,the AFG device shows four distinct conductive states with a high on/off current ratio over 106 and good repeatability.Combining reduced processing complexity and reconfigurable functionalities,the WSe_(2) AFG devices demonstrate great potential towards high-performance photoelectric interconnected circuits.

关 键 词：reconfigurable device two-dimensional(2D)materials HOMOJUNCTION PHOTODIODE 2-bit memory artificial synapse 

分 类 号：TN386[电子电信—物理电子学]