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.