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Retina-Inspired Carbon Nitride-Based Photonic Synapses for Selective Detection of UV Light

Cited 28 time in Web of Science Cited 29 time in Scopus
Authors
Park, Hea-Lim; Kim, Haeju; Lim, Donggyu; Zhou, Huanyu; Kim, Young-Hoon; Lee, Yeongjun; Park, Sungjin; Lee, Tae-Woo
Issue Date
2020-03
Citation
Advanced Materials, Vol.32 No.11, p. 1906899
Keywords
artificial retinaartificial synapsesphotonic synapsesUV detection
Abstract
Photonic synapses combine sensing and processing in a single device, so they are promising candidates to emulate visual perception of a biological retina. However, photonic synapses with wavelength selectivity, which is a key property for visual perception, have not been developed so far. Herein, organic photonic synapses that selectively detect UV rays and process various optical stimuli are presented. The photonic synapses use carbon nitride (C3N4) as an UV-responsive floating-gate layer in transistor geometry. C3N4 nanodots dominantly absorb UV light; this trait is the basis of UV selectivity in these photonic synapses. The presented devices consume only 18.06 fJ per synaptic event, which is comparable to the energy consumption of biological synapses. Furthermore, in situ modulation of exposure to UV light is demonstrated by integrating the devices with UV transmittance modulators. These smart systems can be further developed to combine detection and dose-calculation to determine how and when to decrease UV transmittance for preventive health care.
ISSN
0935-9648
URI
https://hdl.handle.net/10371/171781
DOI
https://doi.org/10.1002/adma.201906899
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Material Science and Engineering (재료공학부) Journal Papers (저널논문_재료공학부)
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