Eu3+ Activated Red Phosphor Ca3 YAl3 B4 O15 with Low Thermal Quenching Behavior.

Abstract

This paper reports a sequence of Ca3 YAl3 B4 O15 : xEu3+ 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 D0 →7 F2 transition of the Eu3+ ion. The results showed that the optimum Eu3+ doping concentration of Ca3 YAl3 B4 O15 : Eu3+ phosphor is x= 80mol%, and the concentration quenching mechanism of Ca3 YAl3 B4 O15 : Eu3+ red phosphor belongs to the exchange coupling between Eu3+ ions. The CIE coordinate and color purity of Ca3 Y0.2 Al3 B4 O15 : 0.8Eu3+ were calculated as (0.6375, 0.3476) and 95.5%, respectively. Moreover, the red emission of the obtained phosphor Ca3 YAl3 B4 O15 : 0.8Eu3+ exhibits low thermal quenching behavior with an intensity retention rate of 92.85% at 150 °C. The above results manifest that the Eu3+ -activated Ca3 YAl3 B4 O15 phosphor is predicted to be a promising red luminescent component for the white light-emitting diodes.