Synthesis And Fluorescent Properties Of Nanoscale GdVO₄ Doped With Tm 3+ And/or Dy³⁺ Ions

White light emitting diode is a new semiconductor lighting source, and one of the key technologies is the fabrication of high effective phosphor. Nanoscale materials doped with rare earth ions have attracted most interesting because of unique properties of light, electricity and magnet. Now, rare earths (RE) ions doped inorganic nanosized luminous materials display an attractive prospect in practical applications such as in display, lighting, opto-communication, laser device, X-ray sensor, and so on. In this article, we mainly study the preparation of nanosized luminous materials Dy³⁺, Tm³⁺doped/codoped GdVO₄ nanosized luminous materials and luminescence properties research. The new findings are listed as followed:The best GdVO₄ crystals performance was when the pH value of the solution presented 7.00. Dy³⁺, Tm³⁺ single doped/co-doped GdVO₄ nanocrystals were synthesized through precipitation process. The final products were characterized by means of X-ray powder diffraction (XRD), field emission scanning electron microscope (FE-SEM), and photoluminescence spectrophotometer (PL). The results showed that the sizes of Dy³⁺, Tm³⁺ doped/co-doped GdVO₄ nanocrystals were about 30 nm can get fluorescent material. Degree of Dy³⁺ ion-emitting significant improvement was occured when Tm³⁺ doped. When Dy³⁺, Tm³⁺ co-doped GdVO₄, there were two possible ways between Tm³⁺ to Dy3, one is Tm³⁺ 1^D₂→Dy³⁺ 4^M_15/2, the other is Tm³⁺ 1^G₄→Dy³⁺ 4^F_9/2, both of them can increase the level population. And the optimal doping concentration of Tm³⁺ and Dy³⁺ is 0.5mol% and 2mol%. The cancellation of concentration will be happened if the doping concentration increased. On the chromaticity coordinate we can observe the blue and yellow green, respectively, the color coordinates for nano-sized GdVO₄: 0.5mol% Tm³⁺, 0.5mol% Dy³⁺ phosphors are x = 0.3187 and y= 0.3488, which is close to equal energy point (x= 0.3333, y=0.3333). Therefore, as white light emitting materials, Tm³⁺, Dy³⁺ co-doped GdVO₄ can embrace a better day.