Temperature dependent growth of Cu2SnS3 thin films using ultrasonic spray pyrolysis for solar cell absorber layer and photocatalytic application

Rahaman, Sabina and Sunil, M Anantha and Singha, Monoj Kumar and Ghosh, Kaustab (2019) Temperature dependent growth of Cu2SnS3 thin films using ultrasonic spray pyrolysis for solar cell absorber layer and photocatalytic application. In: MATERIALS RESEARCH EXPRESS, 6 (10).

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Abstract

Ternary chalcogenide Cu2SnS3 (CTS) thin films are deposited on glass substrates using low cost ultrasonic spray pyrolysis (USP) technique by varying substrate temperatures 300 degrees C to 550 degrees C. Crystal structure of CTS thin film is found to change its phase from amorphous to tetragonal phase with increase in substrate temperature. Properties of as-deposited Cu2SnS3 thin films are studied using various characterization techniques. X-ray powder diffraction (XRD) studies confirm the formation of Cu2SnS3 tetragonal phase with orientation along (112) plane with increase in substrate temperature. Raman analysis revealed the formation of binary phase at 550 degrees C substrate temperature. Increase in substrate temperature resulted in stoichiometric nature of Cu2SnS3 films at 500 degrees C. The absorption coefficient of CTS films is found to be similar to 10(5) cm(-1) with band gap ranging from 1.35 eV to 1.48 eV. Electrical properties of CTS films exhibited p type conductivity with carrier concentration of the order of 10 21 cm(-3). The resistivity of the CTS films is found to vary from 1.5 x 10(-3) to 3.2 x 10(-3) Omega-cm. Photocatalytic effect of optimized Cu2SnS3 thin film under visible light (300 W) is examined with methylene blue (MB) dye and similar to 90% MB is degraded under 3 hours visible light irradiation. The above properties indicate that Cu2SnS3 is a potential candidate to be used for solar cell absorber layer and photocatalytic activity.

Item Type:	Journal Article
Publication:	MATERIALS RESEARCH EXPRESS
Publisher:	IOP PUBLISHING LTD
Additional Information:	Copyright of this article belongs to IOP PUBLISHING LTD
Keywords:	ultrasonic spray pyrolysis; absorber layers for solar cell; crystal structure; photocatalyst; MB degradation; Cu2SnS3 (CTS) thin film
Department/Centre:	Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited:	19 Nov 2019 10:56
Last Modified:	19 Nov 2019 10:56
URI:	http://eprints.iisc.ac.in/id/eprint/63576

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