Affiliation:
1. Hunan Key Laboratory for Super Microstructure and Ultrafast Process School of Physics Central South University Changsha Hunan 410083 P. R. China
2. State Key Laboratory of Precision Manufacturing for Extreme Service Performance College of Mechanical and Electrical Engineering Central South University Changsha Hunan 410083 P. R. China
3. Hunan Key Laboratory of Nanophotonics and Devices School of Physics Central South University 932 South Lushan Road Changsha Hunan 410083 P. R. China
Abstract
AbstractThe scientific community is very interested in artificial visual perception systems because of their neuromorphological capabilities, such as image recognition, learning, and memory. This study reports on an organic heterojunction ambipolar transistor with PTCDI‐C8/C8‐BTBT/PTCDI‐C8 sandwich structure. The proposed transistor efficiently transports both holes and electrons, with a current‐on‐switch ratio of ≈106. Furthermore, hole or electron carrier transmission mechanisms are constructed to achieve the controllable adjustment of bi‐directional photoresponse under identical light illumination conditions by adjusting the gate voltage (positive photoresponse for Vg = 30 V and negative photoresponse for Vg = −30 V). The basic synaptic behaviors are simulated under light illumination, and the power consumption of the device is 18.51 fJ per synaptic event, which is comparable to the energy required for biological synapses. Finally, the simulation of human visual adaptation is completed using the bi‐directional photoresponse effects of the organic heterojunction phototransistor array, which provides a novel idea for neuromorphic visual simulation.
Funder
National Key Research and Development Program of China
Central South University
Innovative Research Group Project of the National Natural Science Foundation of China
Cited by
1 articles.
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