Ultrasonic spray pyrolysis of CZTS solar cell absorber layers and characterization studies

Prabhakar, Tejas and Nagaraju, J (2010) Ultrasonic spray pyrolysis of CZTS solar cell absorber layers and characterization studies. In: 35th IEEE Photovoltaic Specialists Conference, JUN 20-25, 2010, Honolulu, HI.

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Abstract

CZTS (Copper Zinc Tin Sulphide) is a wide band gap quartnery chalcopyrite which has a band gap of about 1.45 eV and an absorption coefficient of 10(4) cm(-1); thus making it an ideal material to be used as an absorber layer in solar cells. Ultrasonic Spray Pyrolysis is a deposition technique, where the solution is atomized ultrasonically, thereby giving a fine mist having a narrow size distribution which can be used for uniform coatings on substrates. An Ultrasonic Spray Pyrolysis equipment was developed and CZTS absorber layers were successfully grown with this technique on soda lime glass substrates using aqueous solutions. Substrate temperatures ranging from 523 K to 723 K were used to deposit the CZTS layers and these films were characterized using SEM, EDAX and XRD. It was observed that the film crystallized in the kesterite structure and the best crystallites were obtained at 613 K. It was observed that the grain size progressively increased with temperature. The optical band gap of the material was obtained as 1.54 eV.

Item Type:	Conference Paper
Series.:	IEEE Photovoltaic Specialists Conference
Publisher:	IEEE
Additional Information:	Copyright 2010 IEEE. Personal use of this material is permitted.However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Department/Centre:	Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited:	12 Apr 2011 07:15
Last Modified:	12 Apr 2011 07:15
URI:	http://eprints.iisc.ac.in/id/eprint/36757

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