Tuning of size and luminescence of red Y(V,P)O4:Eu nanophosphors for their application to transparent panels of plasma display

Fabrication of transparent plasma display can be demonstrated by simply applying the scatter-less nanophosphors to the currently available plasma display panel (PDP) scheme. For this goal, the optimization of the nanophosphors with respect to size and luminescence is necessary to produce a uniform, transparent, bright emissive layer. To develop red-emitting nanophosphors suitable for transparent PDP fabrication, we hydrothermally synthesized red-emitting Y(V,P)O₄:Eu nanophosphors having various V/P ratios and Eu concentrations and varied their subsequent annealing condition. When Y_0.94(V_0.5,P_0.5)O4:Eu_0.06 nanophosphor annealed at 1000 °C for 1 h was used, 1.1 μm thick, uniform emissive layer with a high visible transmittance value of 72% was generated on glass substrate by a conventional screen-printing. Mini-sized test panels of transparent red-emitting plasma display were constructed by combining the rear plate (Y(V,P)O₄:Eu nanophosphor layer/glass) and the front plate used in alternating current (ac)-type PDP structure, and their discharge luminance characteristics were evaluated.