Bound exciton in CuGaS2

Abstract

In CuGaS2 crystals absorption and luminescence spectra at the temperature 9 К at excitation by different wavelengths of Ar+ laser are investigated. In the luminescence and absorption spectra in crystals CuGaS2 at the temperature 9 K groups of lines having almost hydrogen-like dependences are found. One series of lines (F0,f1-f3) is found in the absorption and luminescence spectra. The other series (x1-x5) is present only in the luminescence spectra.