Preparation of transparent red-emitting layer using hydrothermally synthesized YVO₄:Eu³⁺ nanophosphors

Nano-scaled red-emitting YVO₄:0.05Eu³⁺ phosphors were synthesized by ethylene glycol-assisted hydrothermal method followed by annealing process. The effects of annealing process on the crystalline phase, particle morphology and emission properties were investigated. The prepared YVO₄ nanophosphors showed strong red luminescence, based on the ⁵D₀-⁷F₂ transition of Eu³⁺ ion, under 147 nm excitation. From the Eu³⁺-doped YVO₄ nanophosphors, the transparent layers were formed onto a glass substrate by a screen printing technique. All the phosphor layers formed with multiple coating exhibited an outstanding visible transparency. The mini-sized transparent plasma-discharge panels were fabricated using the nanophosphor layers deposited by screen printing and their luminance characteristics investigated.