Abstract
The yellow Sr0.96La0.01MoO4: 0.02Dy3+phosphors for white LEDs were synthesized by the high-temperature solid-state process, and the samples were analyzed using an X-ray diffractometer and fluorescence spectroscopy. The results indicate that Sr0.96La0.01MoO4: 0.02Dy3+phosphor can be effectively excited by a 352 nm laser and emission by a 573 nm laser. The CIE chromaticity coordinates of Sr0.96La0.01MoO4: 0.02Dy3+phosphor were found in the yellow region with a CCT of 4192 K. The temperature dependency of Sr0.96La0.01MoO4: 0.02Dy3+phosphor under the excitation of 352 nm and the temperature quenching in the emission were detected. The phosphor intensity of the sample reaching the highest level at 573 nm when the x of La3+ equals 0.02. With the increase of the doping concentration of La3+, the color coordinate of the sample excited by UV light moves to the yellow light area. Then we conducted theoretical calculations on the band structure, density of states, and optical properties by the first principle method.
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