Effect of sodium diffusion on the structural and electrical properties of Cu2ZnSnS4 thin films

Prabhakar, Tejas and Jampana, Nagaraju (2011) Effect of sodium diffusion on the structural and electrical properties of Cu2ZnSnS4 thin films. In: Solar Energy Materials and Solar Cells, 95 (3). pp. 1001-1004.

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Abstract

Cu2ZnSnS4 (CZTS) is a kesterite semiconductor consisting of abundantly available elements. It has a band gap of 1.5 eV and a large absorption coefficient. Hence, thin films made of this material can be used as absorber layers of a solar cell. CZTS films were deposited on soda lime and Na free borosilicate glass substrates through Ultrasonic Spray Pyrolysis. The diffusion of sodium from soda lime glass was found to have a profound effect on characteristics like grain size, crystal texture and conductivity of CZTS thin films. Copper ion concentration also varied during the deposition and it was observed that the carrier concentration was enhanced when there was a deficiency of copper in the films. The effect of sodium diffusion and copper deficiency in enhancing the structural and electrical properties of CZTS films are presented in this paper. (C) 2010 Elsevier B.V. All rights reserved.

Item Type:	Journal Article
Publication:	Solar Energy Materials and Solar Cells
Publisher:	Elsevier Science B.V.
Additional Information:	Copyright of this article belongs to Elsevier Science B.V.
Keywords:	CZTS; Sodium; Soda lime glass; Borosilicate; Ultrasonic Spray Pyrolysis
Department/Centre:	Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited:	29 Mar 2011 11:50
Last Modified:	29 Mar 2011 11:50
URI:	http://eprints.iisc.ac.in/id/eprint/36333

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