Characteristics of Pr3+ ion-doped t-zircon type LaVO4 prepared using a hydrothermal method

The luminescent properties of Pr3+ ion-doped t-type LaVO4 phosphor synthesized by the hydrothermal method were investigated. The XRD results shows that the optimum conditions for preparing t-type LaVO4 are 180 oC, 16 h. These particles are homogeneous distribution with uniform particle sizes for various Pr3+ ion concentrations, but the particle sizes seem to be increased with increasing Pr3+ ion contents. For Pr3+ ion-doped m-type and t-type LaVO4 phosphor, the absorption and excitation behavior are almost the same, but there is an obviously difference for emission behavior. The main emission peak is from the 1D2→3H4 transition for Pr3+ ion-doped t-type LaVO4 phosphor. The Commission International de I’Edairage chromaticity coordinates shifted from blue region to white region, and then shift to light-blue region. A single white light emitting phosphor can be obtained if the Pr3+ ion concentration is appropriate.