The effect of Ga^(3+) addition on the photoluminescence and cathodoluminescence of SrTiO₃:Pr^(3+) was studied by performing the excitation, emission and decay time measurements. Addition of Ga^(3+) in SrTiO₃:Pr^(3+) resulted in a considerable enha...
The effect of Ga^(3+) addition on the photoluminescence and cathodoluminescence of SrTiO₃:Pr^(3+) was studied by performing the excitation, emission and decay time measurements. Addition of Ga^(3+) in SrTiO₃:Pr^(3+) resulted in a considerable enhancement of Pr^(3+) emission intensity. From the analysis of the experimental results, the following mechanism is proposed. Excitation into the SrTiO₃ host lattice leads to the formation of electrons in the conduction band and holes in the valence band. The electrons in the conduction band recombine radiatively with the holes trapped at Ga^(3+) and the energy is transferred to Pr^(3+) ion which give its own characteristic red emission.