Energy Band Structure of CuInS2 Crystals

Abstract

In this work the reflectivity spectra and wave-length derivative reflectivity (WDR) spectra of CuInS2 crystals have been investigated in the region E ≥ Eg. The n = 1, n = 2 and n = 3 excitonic states are determined and contours of exciton lines n = 1 are calculated. The parameters of excitons and bands have been determined for the region of band gap minimum. The main band gaps are determined for Γ-, N- and T-points of the Brillouin zone.