LAUSR

Abstract The search of efficient and thermal-stable red phosphors for NUV chip-based white light-emitting diodes (WLEDs) remains quite a challenge for phosphor development. Herein, a novel Eu3+-doped Sr3Y(BO3)3 red-emitting phosphor was prepared and the corresponding structural and luminescent properties were systematically studied. XRD results indicate that a complete solid solution of Sr3(Y,Eu)(BO3)3 can be formed. Sr3Y(BO3)3: Eu3+ phosphors show strong and high-purity red emission under UV excitation. Concentration quenching is almost absent in Sr3Y(1-x)Eux(BO3)3 system due to large Stokes shift of Eu3+ emission and effective Eu3+ separation by SrO8 and BO3 polyhedrons. The optimized Sr3Y(BO3)3: 0.9Eu3+ phosphor is found to have good emission stability at high temperature (70% of RT emission intensity at 473 K). The results indicate Sr3Y(BO3)3: Eu3+ is a promising NUV-excited red phosphor for LED application.