Eu2+ activated NaBa3Si2O7F: A new efficient blue-emitting luminescent material for solid-state lighting and display

Exploring novel efficient phosphors for lighting and display has always been an important and meaningful work for researchers. Herein, a novel efficient blue-emitting phosphor, Eu²⁺ doped barium-containing silicate fluoride NaBa₃Si₂O₇F, was prepared by solid-state method. The phosphor can produce bright blue light peaked at 452 nm with full-width at half-maximum about 57 nm under near-UV light excitation, and it exhibits a high internal quantum yield about 76.23%. The temperature-dependent photoluminescence spectra show that this phosphor owns good thermal stability, and the emission intensity at 425 K is 67% of that at room temperature. The outstanding data of fabricated device demonstrate that the blue phosphor has large possibility of practical application for white light-emitting diode. Furthermore, the phosphor also possesses good cathodoluminescence properties under various accelerating voltage with different probe currents, indicating its potential application in field emission displays.