Effect of Deposition Conditions on the Characterization of Cu(In,Ga)Se2 Precursor Films by Sputtering Process

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In this study, Cu(In,Ga)Se2 (CIGS) thin films were deposited onto bi-layer Mo coated soda-lime glass by sputtering a chalcopyrite CIGS quaternary alloy target. The influence of sputtering power and substrate temperature on the characterization of CIGS precursor films was investigated. Experimental results demonstrate that the CIGS quaternary target has the characteristics of chalcopyrite structures. The samples deposited at a sputter power of 1.5 W/cm2 (both as-deposited and after annealing) exhibited superior uniformity, and the phenomenon of composition loss resulting from annealing was not drastic. The composition distribution of as-deposited film produced at a substrate temperature 373 K approached that of ideal stoichiometry.

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63-68

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July 2012

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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