Journal
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
Volume 12, Issue 1-2, Pages 82-87Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.mssp.2009.07.010
Keywords
CuGa0.3In0.7Se2; Thin film; CSVT; Photoacoustic spectroscopy; Intrinsic defects
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Polycrystalline thin films CuGa0.3In0.7Se2 (CIGS) were deposited onto coated soda-lime glass and transparent conducting oxide (SnO2) substrates at 480 degrees C substrate temperature with a low cost and potentially large area deposition method by using close-spaced vapor transport technique (CSVT) designed in our laboratory (LAMPS). Morphological, structural and compositional properties were determined using X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS), respectively. Optical transmission spectra were used to determine absorption coefficient and gap energy of the sample. Using photoacoustic spectroscopy, we report the activation energies of shallow and deep levels. Finally, we discuss the results obtained. (C) 2009 Published by Elsevier Ltd.
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