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Luminescence Properties of a Novel Blue-Emitting Phosphor NaBaBO 3 :Tm 3+ ,K +

2015; Trans Tech Publications; Volume: 833; Linguagem: Inglês

10.4028/www.scientific.net/msf.833.39

1662-9760

Jianghui Zheng, Qi Cheng, Li Li Ying, Li Cai, Chao Chen,

Radiation Detection and Scintillator Technologies

A novel blue-emitting phosphor NaBaBO 3 doped with Tm 3+ was prepared using a conventional high temperature solid-state reaction method. Its crystal structure and luminescence properties were studied. Photoluminescence measurements indicate that the phosphor features a satisfactory blue performance due to the 1 D 2 → 3 F 4 transition of Tm 3+ with the highest photoluminescence intensity located at 460 nm excited by 359 nm near-ultraviolet (NUV) light. In addition, the concentration of Tm 3+ was adjusted in order to obtain the optimum emission intensity. When the Tm 3+ concentration in NaBaBO 3 is 6.0 mol% the maximum intensity can be obtained. The concentration quenching occurs when Tm 3+ concentration is beyond 6.0 mol% and the concentration quenching mechanism can be explained by the dipole–dipole interaction. The measured chromaticity coordinate for the NaBaBO 3 :Tm 3+ phosphor under 359 nm excitation is determined to be (0.1470, 0.1090). The present work suggests that the NaBaBO 3 :Tm 3+ ,K + phosphor is a promising blue-emitting material for NUV white light-emitting diodes.