Preparation and fluorescence properties of Eu3+-doped CaLaGaO4 red-emitting phosphors
A series of Eu3+-doped CaLaGaO4 red-emitting phosphors with different concentrations were prepared via the high-temperature solid phase method.The results indicate that the obtained phosphors can be effectively pumped by a 392 nm near-ultraviolet light.The Eu3+-doped CaLaGaO4 phosphor displayed the characteristic transi-tions of Eu3+with the strongest emission at 609 nm,originating from 5D0→7F2 transition and the luminescence inten-sity reached its maximum when the concentration of Eu3+reached 0.3.In addition,the phosphor demonstrated a remarkable color purity value of 96.3％with CIE coordinates(0.613,0.359)lying closer to the ideal red color CIE coordinates(0.670,0.330).Furthermore,the photoluminescence emission intensity maintained 75％at 498 K com-pared to 298 K due to the thermal quenching effect,showcasing excellent thermal stability with an activation energy of 0.151 3 eV.
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