Self-powered, ultrasensitive, room temperature humidity sensors using SnS2 nanofilms

Rambabu, A and Singh, DK and Pant, R and Nanda, KK and Krupanidhi, SB (2020) Self-powered, ultrasensitive, room temperature humidity sensors using SnS2 nanofilms. In: Scientific Reports, 10 (1).

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Abstract

Humidity monitoring has become extremely vital in various technological fields such as environment control, biomedical engineering, and so on. Therefore, a substantial interest lies in the development of fast and highly sensitive devices with high figures of merit. Self-powered and ultrasensitive humidity sensors based on SnS2 nanofilms of different film thicknesses have been demonstrated in this work. The sensing behavior has been investigated in the relative humidity (RH) range of 2�99. The observed results reveal a remarkable response and ultrafast detection even with zero applied bias (self-powered mode), with response and recovery times of ~ 10 and ~ 0.7 s, respectively. The self-powered behavior has been attributed to the inhomogeneities and the asymmetry in the contact electrodes. The highest sensitivity of ~ 5.64 � 106 can be achieved at an applied bias of 5 V. This approach of fabricating such highly responsive, self-powered and ultrafast sensors with simple device architectures will be useful for designing futuristic sensing devices. © 2020, The Author(s).

Item Type:	Journal Article
Publication:	Scientific Reports
Publisher:	Nature Research
Additional Information:	The copyright of this article belongs to Nature Research
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	22 Sep 2020 10:47
Last Modified:	22 Sep 2020 10:47
URI:	http://eprints.iisc.ac.in/id/eprint/66515

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