Influence of g-irradiation on photoluminescence spectra of CdTe:Cl

Autor: Vakhnyak, N.D., Krylyuk, S.G., Kryuchenko, Yu.V., Kupchak, I.M.
Jazyk: angličtina
Rok vydání: 2002
Popis: Photoluminescence properties of high-resistivity CdTe:Cl crystals irradiated with g-rays have been studied. An enhancement of near-edge luminescence intensity is observed after a low dose g-irradiation (D < 10 kGy). For larger doses of g-irradiation both a decrease of the total luminescence intensity and the intensity redistribution between the lines of excitons bound to different acceptors occur. For the donor-acceptor recombination with A-centers participation, an increase of the Huang-Rhys factor S is found with D increase. This fact can be explained by decrease of the A-centers concentration. The experimentally determined S values are compared with a calculated S(R) dependence for different distances R between donors and acceptors.
Databáze: OpenAIRE