Affiliation:
1. Institute of Photoelectronic Thin Film Devices and Technology Key Laboratory of Efficient Utilization of solar energy of Tianjin College of Electronic Information and Optical Engineering Engineering Research Center of Thin Film Photoelectronic Technology of Ministry of Education Nankai University Tianjin 300350 China
2. Smart Sensing Interdisciplinary Science Center Nankai University Tianjin 300350 China
3. Shenzhen Research Institute of Nankai University Shenzhen 518000 China
4. Department of Materials Science State Key Laboratory of Molecular Engineering of Polymers Fudan University Shanghai 200433 China
Abstract
AbstractNeuromorphic device that percepts ultraviolet (UV) radiations is essential for supplementing human visual perception. However, UV‐responsive synapses with high sensitivity and wavelength selectivity have not yet been developed so far. Herein, 2D optoelectronic synapses that are able to distinguish between UV‐A, UV‐,B and UV‐C radiations using a single material are demonstrated. The synapses use Ca2Nb3O10 nanosheets with wide bandgap and persistent photoconductivity effect (PPC) as UV‐responsive layer. The devices can detect UV‐C rays at ultralow intensity of 70 nW cm−2, which is the lowest record among 2D UV synaptic devices. Moreover, such a device demonstrates UV image vision, recognition, and memorization functions based on its diverse synaptic behaviors. The atomically thin UV synapses provide implications for enhancing human visual perception capabilities with spectral selectivity, ultrahigh sensitivity, and low‐energy consumption.
Funder
National Key Research and Development Program of China
Cited by
2 articles.
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