Texture manipulation of CuInSe2 thin films

Abstract

We present a growth method that allows tailoring of preferred orientation in CuInSe2 thin-films grown on Mo-coated soda-lime glass substrates. In particular, films exhibiting a (204) preferred orientation are demonstrated, in addition to already reported (112) and randomly oriented films. Effects of substrate composition, growth temperature, and final film composition on texture phenomena are presented. In general, we find that texture is highly dependent on growth temperature, substrate material and, in the case of Mo-coated soda-lime glass substrates, the structural properties of the Mo layer. We provide evidence for the attainment of such structural orientation, and we present a growth model to explain the mechanism allowing such modifications.