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    Bidirectional All-Optical Synapses Based on a 2D Bi 2 O 2 Se/Graphene Hybrid Structure for Multifunctional Optoelectronics

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    Type
    Article
    Authors
    Yang, Chia-Ming cc
    Chen, Tsung-Cheng
    Verma, Dharmendra
    Li, Lain-Jong cc
    Liu, Bo cc
    Chang, Wen-Hao cc
    Lai, Chao-Sung cc
    KAUST Department
    Material Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Physical Sciences and Engineering DivisionKing Abdullah University of Science and Technology Thuwal 23955-6900 Saudi Arabia
    Date
    2020-05-28
    Online Publication Date
    2020-05-28
    Print Publication Date
    2020-07
    Embargo End Date
    2021-05-28
    Submitted Date
    2020-02-20
    Permanent link to this record
    http://hdl.handle.net/10754/662974
    
    Metadata
    Show full item record
    Abstract
    Neuromorphic computing has been extensively studied to mimic the brain functions of perception, learning, and memory because it may overcome the von Neumann bottleneck. Here, with the light-induced bidirectional photoresponse of the proposed Bi2O2Se/graphene hybrid structure, its potential use in next-generation neuromorphic hardware is examined with three distinct optoelectronic applications. First, a photodetector based on a Bi2O2Se/graphene hybrid structure presents positive and negative photoresponsibility of 88 and −110 A W−1 achieved by the excitation of visible wavelength and ultraviolet wavelength light at intensities of 1.2 and 0.3 mW cm−2, respectively. Second, this unique photoresponse contributes to the realization of all optically stimulated long-term potentiation or long-term depression to mimic synaptic short-term plasticity and long-term plasticity, which are attributed to the combined effect of photoconductivity, bolometric, and photoinduced desorption. Third, the devices are applied to perform digital logic functions, such as “AND” and “OR,” using full light modulation. The proposed Bi2O2Se/graphene-based optoelectronic device represents an innovative and efficient building block for the development of future multifunctional artificial neuromorphic systems.
    Citation
    Yang, C., Chen, T., Verma, D., Li, L., Liu, B., Chang, W., & Lai, C. (2020). Bidirectional All-Optical Synapses Based on a 2D Bi 2 O 2 Se/Graphene Hybrid Structure for Multifunctional Optoelectronics. Advanced Functional Materials, 2001598. doi:10.1002/adfm.202001598
    Sponsors
    This study was supported by grants from the Ministry of Science and Technology, Taiwan (MOST 108-2221-E-182-060-MY3, MOST 108-2628-E-182-002-MY3 and MOST 108-2218-E-182-002).
    Publisher
    Wiley
    Journal
    Advanced Functional Materials
    DOI
    10.1002/adfm.202001598
    Additional Links
    https://onlinelibrary.wiley.com/doi/abs/10.1002/adfm.202001598
    ae974a485f413a2113503eed53cd6c53
    10.1002/adfm.202001598
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Material Science and Engineering Program

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