Temperature study of absorption and photoluminescence spectra of CdS{sub}xSe{sub}(1-x) films grown on quartz substrate by pulse laser ablation technique

摘要

The optical properties of CdS{sub}xSe{sub}（1-x） alloy films, deposited on quartz substrate by means of pulsed laser ablation technique, have been investigated by absorption and photoluminescence measurements as a function of the temperature. The absorption measurements, analyzed according to the Elliott theory, permit to obtain the temperature and composition dependence of the band gap, which are in good agreement with well known phenomenological models. The photoluminescence efficiency persisting up to room temperature is very interesting for device applications, because of the capability of tuning the emission line in the spectral region from green to red, by varying the Sulphur concentration x.