Luminescent properties of EuGa2S4 : Er3+
Résumé
We have studied the thermo-and photoluminescence of undoped and Er3+-doped EuGa2S4 crystals in the temperature range 77–450 K. In thermoluminescence studies, different heating rates and excitation intensities have been used. The results demonstrate that, with increasing heating rate, the intensity of thermoluminescence peaks grows, and the peaks shift to higher temperatures. EuGa2S4:Er3+ crystals exhibit both Stokes and anti-Stokes luminescence. The mechanisms of these processes are analyzed.