Optimal conditions for preparing CIGS thin film through two-step process of sputtering followed by selenization

AuthorsM Moradi, M Zahedifar, T Ghorbani, M Saadat, K Rostami
JournalStudia Universitatis Babes-Bolyai, Chemia
Page number 163-175
Volume number61
Paper TypeFull Paper
Published At0-0-01
Journal GradeISI
Journal TypeElectronic
Journal CountryIran, Islamic Republic Of
Journal IndexISI

Abstract

Cu(In,Ga)Se2 films were prepared via a sputtering route followed by selenization process on glass substrates. Having a layer sequence Mo/In/Cu-Ga with preferred thicknesses, the metallic layers were selenized at vacuum of 6×10-3 mbar and 1 atm pressure with a total gas inlet of 7 sccm. Under vacuum, only single-phase CIGS was observed while at 1 atm, other phases in addition to CIGS were formed.The metallic layers were selenized at several temperatures. Pure-phased CIGS films were obtained by selenization at 600˚C. The crystallinity of the obtained films was further enhanced by increasing the selenization temperature. The produced CIGS films were studied by X-ray diffraction (XRD), scanning electron microscope (SEM) and energy dispersion spectroscopy (EDS) techniques.

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