Gour, K. S. and Singh, O. P. and Bhattacharyya, Biplab and Parmar, R. and Husale, Sudhir and Senguttuvan, T. D. and Singh, V. N. (2017) Enhanced photoresponse of Cu2ZnSn(S, Se)(4) based photodetector in visible range. Journal of Alloys and Compounds , 694. pp. 119-123. ISSN 0925-8388

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Abstract

Fast switching response of photodetectors is needed for many applications. Therefore, it is necessary to study the photoconductivity properties of earth abundant and cost effective materials. Till now, there are only two reports based on photoconductivity study of Cu2ZnSnS4 (CZTS) based materials. In this study, CZTSSe thin film on soda-lime glass substrate was deposited using one-step reactive sputtering from CZTSe target in presence of H2S followed by annealing. Optical, structural, morphological and elemental compositional analyses were carried out to characterize the CZTSSe thin film. The value of optical band gap estimated using Tauc's plot was 1.45 eV. The presence of very intense peak corresponding to (112) plane in the XRD pattern suggested growth to be oriented. Similar was the case with Raman studies. Photoconductivity study of CZTSSe thin film in visible region (excitation wavelength 532 nm) is carried out. At a bias voltage of 5 V, response rise time and decay time in visible range for CLIsSe were 330 ms and 0.986 ms, respectively. The values of responsivity, detectivity, sensitivity (I-light/I-dark) and external quantum efficiency were 14.6 mA/W, 3.5 x 10(9) Jones, 6.9363 and 3.5%, respectively. The shortest reported response decay time by CZTSSe based photodetector is the novelty of this work. This work shows the possibility of utilizing CZTSSe thin film as photodetector for various applications.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Elsevier.
Subjects:	Chemistry > Physical Chemistry Materials Science Metallurgy & Metallurgical Engineering
Divisions:	UNSPECIFIED
Depositing User:	Users 27 not found.
Date Deposited:	06 Sep 2018 11:13
Last Modified:	06 Sep 2018 11:13
URI:	http://npl.csircentral.net/id/eprint/2700

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