High-performance self-powered UV photodetectors using SnO2 thin film by reactive magnetron sputtering

Kumar, M and Saravanan, A and Joshi, SA and Chen, S-C and Huang, B-R and Sun, H (2024) High-performance self-powered UV photodetectors using SnO2 thin film by reactive magnetron sputtering. In: Sensors and Actuators A: Physical, 373 .

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Abstract

Self-powered UV photodetector (UVPD) operates without the need for an external energy source and contributes to global energy conservation. With ongoing innovation, self-powered PDs are becoming increasingly appealing for industrial and innovation applications such as advanced environmental monitoring and communication devices. This study investigates the influence of varying working pressures (ranging from 3 to 15 mTorr) during reactive magnetron sputtering on the crystalline structure, surface morphology, and performance of SnO2 thin film photodetectors, aiming to fabricate self-powered UVPDs. The SnO2-based UVPD demonstrates exceptional self-powered UV photodetection capabilities, characterized by a sensitivity of 6.41�105, responsivity of 0.09 mA/W, and detectivity of 2.99�1010 Jones. In addition, SnO2-based UVPD possesses a switching photo response and recovery time of 0.75 and 0.99 s. Henceforth, it was observed that 8 mTorr SnO2 thin film exhibits exceptional stability, superior photodetector performance, and remarkable repeatability, rendering them highly suitable for UVPD applications. Notably, these films demonstrate sustained functionality for approximately 100 days without necessitating encapsulation. These excellent results confirm that SnO2 thin films are suitable for fabricating future smart optoelectronics devices. © 2024 Elsevier B.V.

Item Type:	Journal Article
Publication:	Sensors and Actuators A: Physical
Publisher:	Elsevier B.V.
Additional Information:	The copyright for this article belongs to Elsevier B.V.
Keywords:	Magnetron sputtering; Morphology; Photodetectors; Surface morphology; Thin films; Tin oxides; Working pressure, Performance; Reactive magnetron sputtering; Responsivity; Self-powered; Sensitivity; SnO2 self-powered photodetector; Thin-films; Tin oxide (SnO2) film; UV photodetectors; Working pressures, Photons
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	24 May 2024 11:17
Last Modified:	24 May 2024 11:17
URI:	https://eprints.iisc.ac.in/id/eprint/85001

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