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Abstract
CdS:Dy films were prepared by CSVS method on the cleaned glass substrates. The influence of Dy doping on the optical properties of CdS thin (500 nm) films was studied. The presence of narrow lines of bound and free excitons in the photoluminescence, reflection and absorption spectra shows a remarkable optical quality of the investigated films. The temperature dependence of the band gap of the films was studied on the basis of measurements of the energy position of the free excitons. A decrease in the anisotropic crystal field and the effect of depolarization of free exciton absorption spectra with increasing temperature are observed. It was concluded that the efficiency of CdS:Dy thin films photovoltaic applications can be further increased.
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