The Structure and Luminescence Characters of SrSiO3:Eu3+Bi3+ Synthesized by High Pressure and High Temperature

The SrSiO3:Eu3+Bi3+ samples were firstly synthesized by high-pressure (HP) and high-temperature (HT) method under 3.15 GPa and 1 200 ℃. Comparing with those prepared under atmosphere pressure, the structure of the samples and the influence of pressure and temperature on the luminescence properties has been studied. It shows that the structure of the samples synthesized by HP and HT is of monoclinic, while the samples prepared under atmosphere pressure is of hexagonal. At the same time, for the samples synthesized by HP and HT the intensity and quantum luminescence efficiency decreased obviously, the half-width was broadened and the red shift of emission peak was enlarged to 756 cm-1. The variation of the luminescence characters is due to the pressure-induced changes of crystal field interactions.