Optical Absorption Spectra in CuInS2 Doped with Fe, Mn and Cr

Abstract
Optical absorption spectra were measured in single crystals of CuInS2 doped with Fe, Mn and Cr grown by the chemical transport technique. Intense absorption bands characteristic of individual transition elements were observed. Absorption bands introduced by Fe and Mn were attributed to the photoionization transition, while those by Cr were assigned to the ligand-field transition.