Optical properties of the chalcopyrite semiconductors ZnGeP2, ZnGeAs2, CuGaS2, CuAlS2, CuInSe2, and AgInSe2

Abstract

The reflectivities at 80 K of the chalcopyrite semiconductors CuGaS2, CuAlS2, CuInSe2, AgInSe2, ZnGeP2, and ZnGeAs2 were measured in the energy range from 2 to 26 eV using sychrotron radiation. Occupied and unoccupied electronic states are described with the aid of the sharp reflectivity features from d levels and of the electronic spectrum from an ESCA spectrometer. © 1977 The American Physical Society.