Eu 3+ Activated Red Phosphor Ca 3 YAl 3 B 4 O 15 with Low Thermal Quenching Behavior.

This paper reports a sequence of Ca 3 YAl 3 B 4 O 15 : xEu 3+ red phosphor prepared by a high-temperature solid-state reaction. At the excitation of 396 nm, the samples emit intense red emission centered around 623nm, which can be attributed to the 5 D 0 → 7 F 2 transition of the Eu 3+ ion. The results showed that the optimum Eu 3+ doping concentration of Ca 3 YAl 3 B 4 O 15 : Eu 3+ phosphor is x= 80mol%, and the concentration quenching mechanism of Ca 3 YAl 3 B 4 O 15 : Eu 3+ red phosphor belongs to the exchange coupling between Eu 3+ ions. The CIE coordinate and color purity of Ca 3 Y 0.2 Al 3 B 4 O 15 : 0.8Eu 3+ were calculated as (0.6375, 0.3476) and 95.5%, respectively. Moreover, the red emission of the obtained phosphor Ca 3 YAl 3 B 4 O 15 : 0.8Eu 3+ exhibits low thermal quenching behavior with an intensity retention rate of 92.85% at 150 °C. The above results manifest that the Eu 3+ -activated Ca 3 YAl 3 B 4 O 15 phosphor is predicted to be a promising red luminescent component for the white light-emitting diodes.