Resonance impurity radiation in CuGaS2 crystals

In this work the reflectivity spectra of the CuGaS2 crystals have been investigated in the EIIc polarization and the absorption spectra were studied in the E ⊥ c polarization at the 10 K. The parameters of the excitons and the band gaps have been determined. The low temperature (10 K) luminescence spectra of the CuGaS2 crystals have been investigated under the excitation by 4880 Å and 4965 Å Ar+ laser lines. A model of optic transitions between the levels of excitons bound on neutral donor is proposed.