Structural and Electronic Properties of Polycrystalline Cu(In,Ga)(S,Se)2 Alloys

Abstract
We present a systematic study on the polycrystalline Cu(In,Ga)(S,Se)2 alloys with a gallium to indium ratio of Ga/(Ga+In)2 alloy system. We find that contrary to the Cu(In,Ga)(Se)2 alloy system the valence band position is significantly lowered with increasing bandgap.