Red-emitting EU 3+-activated (Y 0.95-sAl s)VO 4 (0 < × ≤ 0.12) nanophosphors with the particle size of ~30 nm and the high crystallinity have been successfully synthesized by a hydrothermal reaction. In the synthetic process, deionized water as a solvent and ethylene glycol as a capping agent were used. The crystalline phase, particle morphology, and the photoluminescence properties of the excitation spectrum, emission intensity, color coordinates and decay time, of the prepared (Y 0.95-sAl s)VO 4:Eu 3+ nanophosphors were compared with those of the YVO 4:Eu 3+. Under 147 nm excitation, (Y 0.95-sAl s)VO 4 nanophosphors showed strong red luminescence due to the $ transition of Eu 3+ at 619 nm. The luminescence intensity of YVO 4:Eu 3+ enhanced with partial substitution of Al 3+ for Y 3+ and the maximum emission intensity was accomplished at the Al 3+ content of 10 mol%. By the addition of Al 3+, decay time of the (Y 1Al)VO 4:Eu 3+ nanophosphor was decreased in comparison with that of the YVO 4:Eu 3+ nanophosphor. Also, the substitution of Al 3+ for Y 3+ invited the improvement of color coordinates due to the increase of R/O ratio in emission intensity. For the formation of transparent layer, the red nanophosphors were fabricated to the paste with ethyl celluloses, anhydrous terpineol, ethanol and deionized water.By screen printing method, a transparent red phosphor layer was formed onto a glass substrate from the paste. The transparent red phosphor layer exhibited the red emission at 619 nm under 147 nm excitation and the transmittance of ~80% at 600 nm.
- (Y Al)VO :Eu
- Transparent luminescent layer
ASJC Scopus subject areas
- Materials Science(all)