Eu3+-activated R3GaO6 (R = Y, Gd) phosphors were prepared in a conventional solid-state reaction and their optical properties were investigated. These compounds exhibit strong red emission under light excitation at 254 nm. The emission spectra are dominated by peaks appearing around 610-630 nm that are induced by the electric dipole transition of 5Do→ 7F2 of Eu3+. In addition, the appropriate CIE (Commission Internationale de l'Eclairage) chromaticity coordinates, (x = 0.656, y = 0.336) for Y3GaO6 and (x = 0.655, y = 0.334) for Gd3GaO6, become closer to the NTSC (National Television System Committee) values. With the optimized activator concentrations, the maximum emission brightness is approximately 80% Of Y2O3: Eu3+ typical red-emitting phosphor under Hg glow discharge conditions.
ASJC Scopus subject areas
- Materials Science(all)