Growth studies of CuInSe/sub 2/ using Cu-Se fluxes

Abstract

The latest developments in CIGS/CdS/ZnO solar cells show the importance of understanding the growth mechanisms of the absorber layer. For this purpose, the authors studied the influence of Cu, CuSe, Cu/sub 2/Se and Se as additives to a CuInSe/sub 2/ base material. They found that, in a selenium rich atmosphere, the copper rich phase forms CuSe, which acts as a flux in a liquid phase sintering (above its melting temperature of 523/spl deg/C). Testing their findings to the selenization of glass/Mo/In(Se)/Cu structures led to marked grain growth with grains up to 20 /spl mu/m.