Photoluminescence spectra of CdTe:Cl crystals were measured at 5K before and after irradiation by the second harmonic of a YAG:Nd laser. It was found that the Huang–Rhys factor for donor–acceptor pair (DAP) recombination increased after irradiation with laser power above the CdTe melting point which was explained by a decrease of the DAP concentration due to Cd evaporation and to the presence of the thermogradient effect.

Influence of Powerful Laser Irradiation on Impurity-Defect Structure of CdTe Detector Material. A.Medvid, D.V.Korbutyak, S.G.Krylyuk, Y.V.Kryuchenko, E.I.Kuznetsov, I.M.Kupchak, L.L.Fedorenko, P.Hlidek: Nuclear Instruments and Methods in Physics Research Section A, 2004, 531[1-2], 157-60