Lee, Tae-Ju Yun, Kwang-Ro Kim, Su-Kyung Kim, Jong-Ho Jin, Junyoung Sim, Kee-Baek Lee, Da-Hoon Hwang, Gyu Weon Seong, Tae-Yeon 2024-01-19T13:04:28Z 2024-01-19T13:04:28Z 2022-01-10 2021-12 0935-9648 https://pubs.kist.re.kr/handle/201004/116016 Human behavior (e.g., the response to any incoming information) has very complex forms and is based on the response to consecutive external stimuli entering varied sensory receptors. Sensory adaptation is an elementary form of the sensory nervous system known to filter out irrelevant information for efficient information transfer from consecutive stimuli. As bioinspired neuromorphic electronic system is developed, the functionality of organs shall be emulated at a higher level than the cell. Because it is important for electronic devices to possess sensory adaptation in spiking neural networks, the authors demonstrate a dynamic, real-time, photoadaptation process to optical irradiation when repeated light stimuli are presented to the artificial photoreceptor. The filtered electrical signal generated by the light and the adapting signal produces a specific range of postsynaptic states through the neurotransistor, demonstrating changes in the response according to the environment, as normally perceived by the human brain. This successfully demonstrates plausible biological sensory adaptation. Further, the ability of this circuit design to accommodate changes in the intensity of bright or dark light by adjusting the sensitivity of the artificial photoreceptor is demonstrated. Thus, the proposed artificial photoreceptor circuits have the potential to advance neuromorphic device technology by providing sensory adaptation capabilities. English WILEY-V C H VERLAG GMBH Realization of an Artificial Visual Nervous System using an Integrated Optoelectronic Device Array Article 10.1002/adma.202105485 1 ADVANCED MATERIALS, v.33, no.51 ADVANCED MATERIALS 33 51 scie scopus 000705988000001 2-s2.0-85116818761 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article ADAPTATION MECHANISMS RECEPTOR PLASTICITY EYE artificial synapses perovskite patterning polymer electrolytes sensory adaptation