High-efficient, bicolor-emitting GdVO4:Dy3+ phosphor under near ultraviolet excitation

Bicolor emitting GdVO4:Dy3+ phosphor with short columniation-shape was prepared via a simple co-precipitation process. The optimal doping concentration for obtaining maximal luminescent intensity was confirmed to be 0.3 mol% and the electric dipole–dipole interaction is responsible for concentration quenching of Dy3+ emission in GdVO4 phosphor. In order to evaluate the luminescent performance of as-prepared phosphor, the luminescent efficiency and color coordinates were studied. The results show that luminescent efficiency of this phosphor is very high under near UV excitation and twice times higher than commercial Y2O2S:Eu3+ phosphor. In addition, the color coordinates for optimal Dy3+ concentration are (0.339, 0.379), which are close to equal energy point. Therefore, the GdVO4:Dy3+ phosphor may have potential application for solid state lighting.