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STUDY OF OPTICAL, ELECTRICAL PROPERTIES OF CuGaTe2 PREPARED THIN FILMS BY SPRAY PYROLYSIS
A. S. Meshram1, Y. D. Tembhurkar2 and O. P. Chimankar3

Published in: Journal for Advance Research in Applied Sciences
Volume- 4, Issue-5, pp.73-78, Oct 2017
DPI :-> 16.10089.JARAS.2017.V4I5.7378.2039



Abstract
Spray pyrolysis is a simple and inexpensive method to prepared thin film on large area. A thin film of CuGaTe2 is a promising chalcopyrite semiconducting material for solar cell fabrication. We have prepared CuGaTe2 thin films on glass substrate at 3500C by this method, using aqueous solution of Copper chloride, Gallium chloride and Tellurium tetra-chloride and studied their optical and electrical properties. The conductivity of the films was of p-type determined by Hot- Probe method. Resistivity of the films was measured for the temperature ranging from 77 K to 473 K by using Four Probe method. The activation energy calculated from Arrhenius Plot. The films are not doped intentionally and therefore the defects observed in intrinsic nature. In very low temperature region a variable range hopping conduction mechanism appears to be operative. Hall mobility and carrier concentration at room temperature were calculated using Van der Pauw-Hall method. The optical band gap was 1.23 eV calculated from an analysis of optical transmission spectra which were measured by UV-1800 Shimadzu Spectrophotometer. The energy band gap show direct allowed transition.

Key-Words / Index Term
CuGaTe2, UV-1800 Spectrophotometer, Four Probe Method, etc.

How to cite this article
A. S. Meshram1, Y. D. Tembhurkar2 and O. P. Chimankar3 , “STUDY OF OPTICAL, ELECTRICAL PROPERTIES OF CuGaTe2 PREPARED THIN FILMS BY SPRAY PYROLYSIS”, Journal for Advance Research in Applied Sciences, 4, Issue-5, pp.73-78, Oct 2017. DPI:16.10089.JARAS.V4.I5.2039