Hydrothermal synthesis of self-emitting Y(V,P)O4 nanophosphors for fabrication of transparent blue-emitting display device

Self-emiting Y(Vx,P1−x)O4 blue nanophosphors with various compositons (x=0.1–0.9) were synthesized by a facile hydrothermal route and subsequently annealed at different temperatures of 800–1100 °C for 2 h. A higher content of vanadate in Y(V,P)O4 nanophosphors resulted in a larger particle growth upon annealing. The blue luminescence under a vacuum ultraviolet excitation increased with an increasing phosphate content. Considering the size and luminescence, Y(V0.1,P0.9)O4 nanophosphors annealed at 800, 1000, and 1100 °C were used for the formation of transparent blue emissive layer. Nanophosphor layer was uniformly deposited on glass substrate by a screen-printing. ∼0.9 μm thick nanophosphor layer that was prepared with 1000 °C-annealed Y(V0.1,P0.9)O4 nanophosphor showed a high visible transmittance value of 78%. Transparent blue-emitting test panel of plasma display was simply fabricated using nanophosphor layer/glass as a rear panel and combining it with the front panel used in the current plasma display panel, and their discharge luminance properties were discussed.