Nitrocellulose‐Passivated SnO 2 Thin Film as a Ultraviolet‐C Photodetector

• Published in: Advanced engineering materials Vol. 26; no. 6
• Main Authors: Kaawash, Nabeel M. S., Halge, Devidas I., Narwade, Vijaykiran N., Thabit, Mohammed Y. H., Khanzode, Pooja M., Dadge, Jagdish W., Alegaonkar, Prashant S., Bogle, Kashinath A.
• Format: Journal Article
• Language: English
• Published: 01.03.2024
• ISSN: 1438-1656; 1527-2648
• DOI: 10.1002/adem.202301602

This study demonstrates the development of an ultraviolet (UV)‐C photodetector (PD) fabricated using a surface‐passivated SnO 2 thin film deposited via spray pyrolysis. This PD possesses an unprecedentedly fast response speed, with both rise time and decay time of 0.3 ms. Furthermore, even when subjected to a modest UV light intensity of 6 μW cm −2 , the device shows a significantly high responsivity of 1500 A W −1 , external quantum efficiency of 7 × 10 5 %, and detectivity of 10 13 Jones. When compared to previously reported SnO 2 ‐based PDs, this device exhibits consistent performance over a long working time, which may be due to the suppression of surface vacancy defects via surface passivation, as observed from structural and optical measurements. This type of PDs has the potential to be useful in wide range of applications, including industrial sensing, medical diagnostics, and environmental monitoring.