Research on a new Tm3+-doped NaCa3Bi(PO4)3F blue-emitting phosphor for w-LEDs

Abstract

Tm3+ doped NaCa3Bi(PO4)3F blue-emitting phosphors have been synthesized following a conventional high-temperature solid-state reaction. Their phase purity, optical characteristics were systematically studied. The results show that the optimal doping concentration of Tm3+was 0.05. Electric multipole interaction was proposed as the mechanism for concentration quenching in NaCa3Bi(PO4)3F materials. Furthermore, the NaCa3Bi(PO4)3F:0.05Tm3+ fluoresces blue with color coordinates (0.1592, 0.0346). The results indicated that NaCa3Bi(PO4)3F:Tm3+ phosphors could participate in fabricating the w-LEDs as the blue component.