Retina-Inspired Organic Heterojunction-Based Optoelectronic Synapses for Artificial Visual Systems
Open Access
- 1 January 2021
- journal article
- research article
- Published by American Association for the Advancement of Science (AAAS) in Research
Abstract
For the realization of retina-inspired neuromorphic visual systems which simulate basic functions of human visual systems, optoelectronic synapses capable of combining perceiving, processing, and memorizing in a single device have attracted immense interests. Here, optoelectronic synaptic transistors based on tris(2-phenylpyridine) iridium (Ir(ppy)3) and poly(3,3-didodecylquarterthiophene) (PQT-12) heterojunction structure are presented. The organic heterojunction serves as a basis for distinctive synaptic characteristics under different wavelengths of light. Furthermore, synaptic transistor arrays are fabricated to demonstrate their optical perception efficiency and color recognition capability under multiple illuminating conditions. The wavelength-tunability of synaptic behaviors further enables the mimicry of mood-modulated visual learning and memorizing processes of humans. More significantly, the computational dynamics of neurons of synaptic outputs including associated learning and optical logic functions can be successfully demonstrated on the presented devices. This work may locate the stage for future studies on optoelectronic synaptic devices toward the implementation of artificial visual systems.Keywords
Funding Information
- Fundamental Research Funds for the Central Universities
- Beijing National Laboratory for Molecular Sciences (BNLMS201904)
- Shanghai Education Development Foundation
- Shanghai Municipal Education Commission (18SG20)
- Science & Technology Foundation of Shanghai (20JC1415600, 19JC1412402)
- National Natural Science Foundation of China (62074111, 61822405)
- National Key Research and Development Program of China (2017YFA0103904)
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