INORGANIC MATERIALS, vol.40, pp.567-569, 2004 (SCI-Expanded)
The effect of doping with Gd, Ho, and Dy (10 -5 to 10 -1 at %) on the photoluminescence behavior (intensity and shape of the spectrum) of single crystals of the layered compounds InSe and GaSe is studied in the range 77-300 K. It is shown that, in both selenides, photoluminescence is of excitonic nature.