Abstract：A promising candidate red fluorescence CaAl12O19∶Mn4+was developed, which was prepared by the solid- state reaction method at 1 500 ℃ for 4 h The influence of Mn4+ concentration and the co- doped ions, R(R=Na+, Li+, K+, and Mg2+) ions on the luminescent properties of CaAl12O19∶Mn4+ were investigated, respectively The results indicated that the phosphor was able to be excited by both UV and blue band light The emission band of CaAl12O19∶Mn4+ was in the deep- red region with the maximum at 652 nm, the shoulders on both sides of the peak (640,666 nm) were attributed to the phonon sideband transition It was observed that optimal concentration of Mn4+ in CaAl12O19 was 005 mol% The co- doped Na+, Li+, Mg2+and K+ could dramatically improve the luminous performance of CaAl12O19∶Mn4+ When the concentration of Na+ and Mg2+ was 5 mol %, the maximum emission intensity of CaAl12O19∶Mn4+ could be increased by more than 2 times So CaAl12O19∶Mn4+, Na+ was expected to be a potential candidate as a red phosphor in warm white LEDs
李迪 王雷 许育东 屈冰雁 石敏. 电荷补偿剂对红色发光材料CaAl12O19∶Mn4+发光性能的影响[J]. , 2016, 23(2): 20-25.
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