Photoacoustic spectroscopy of sprayed CuGaxIn1−xSe2 thin films

Ramakrishna Reddy, Kotte, Chalapathy, R. B. V., Slifkin, Michael, Weiss, A. W. and Miles, Robert (2001) Photoacoustic spectroscopy of sprayed CuGaxIn1−xSe2 thin films. Thin Solid Films, 387 (1-2). pp. 205-207. ISSN 0040-6090

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Abstract

CuGaxIn1−xSe2 thin films have been produced using spray-pyrolysis. The layers were deposited onto Mo-coated soda-lime glass at a substrate temperature of 623 K, and the gallium content of the layers varied. The layers were investigated using photoacoustic spectroscopy. The normalised photoacoustic spectra of CuGaxIn1−xSe2 films with x=0, 0.2, 0.4 and 0.5 showed a sudden fall in the photoacoustic signal at photon energies of 0.99, 1.15, 1.27 and 1.36 eV, respectively, which correspond to the respective direct energy band gaps of these films. The photoacoustic spectra also showed peaks at 0.75, 0.78, 0.82, 0.86 and 0.88 eV, respectively, in the sub-band gap region, which have been attributed to the defect states within these films.

Item Type:	Article
Subjects:	F200 Materials Science F300 Physics
Department:	Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User:	EPrint Services
Date Deposited:	08 Sep 2009 15:01
Last Modified:	31 Jul 2021 08:39
URI:	http://nrl.northumbria.ac.uk/id/eprint/523

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