Organic optoelectronic synapse based on photon-modulated electrochemical doping

被引:0
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作者
Ke Chen
Hang Hu
Inho Song
Habtom B. Gobeze
Won-June Lee
Ashkan Abtahi
Kirk S. Schanze
Jianguo Mei
机构
[1] Purdue University,Department of Chemistry
[2] University of Texas at San Antonio,Department of Chemistry
来源
Nature Photonics | 2023年 / 17卷
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摘要
Optoelectronic synapses can perceive and memorize visual information, making them appealing for future bionic eyes or vision automation. Organic field-effect transistors are a promising platform for optoelectronic synaptic devices thanks to their flexibility and biocompatibility. However, charge screening effects occurring at channel–dielectric interfaces hinder the implementation of programmable multilevel memories. Here, we report photonic organic synapses based on photon-modulated electrochemical doping in electrochemical transistors, where light can manipulate ion insertion into the photoactive layer composed of donor–acceptor heterojunction interfaces. This enables high-density multilevel conductance modulation at low operating voltages (<1 V) and the imitation of ion flux-driven synaptic activity of living systems. The devices can recognize different optical signals and mimic the learning processes of the human brain. By exploiting the integrated functions of perception, processing and memorization of visual information, a single-layer synapse array acts as an artificial retina enabling facial recognition without the use of a complex artificial neural network.
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页码:629 / 637
页数:8
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