Emission color variation of (Ba,Sr)3BP3O12:Eu2+ phosphors for white light LEDs

被引:65
作者
Kuo, Te-Wen [1 ,2 ]
Liu, Wei-Ren [3 ]
Chen, Teng-Ming [1 ,2 ]
机构
[1] Natl Chiao Tung Univ, Phosphors Res Lab, Hsinchu 30010, Taiwan
[2] Natl Chiao Tung Univ, Dept Appl Chem, Hsinchu 30010, Taiwan
[3] Ind Technol Res Inst, Mat & Chem Res Labs, Hsinchu 31014, Taiwan
来源
OPTICS EXPRESS | 2010年 / 18卷 / 03期
关键词
RARE-EARTH IONS; EMITTING DIODES; ENERGY TRANSFER; BOROPHOSPHATE; ILLUMINATION; LUMINESCENCE; EU2+; 1ST;
D O I
10.1364/OE.18.001888
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
A series of alkaline earth borophosphate phosphors, (Ba,Sr)(3)BP3O12 doped with Eu2+ ions, were synthesized by a solid state reaction. Two emission bands at 465 nm and 520 nm were attributed to the f-d transitions of doped Eu2+ ions occupying in two different cation sites in host lattices and emission color variation was observed by substituting the M2+ sites, which was rationalized in terms of two competing factors of the crystal field strength and bond covalence. Green and bluish-white pc-LEDs were fabricated by combination of a 370 nm near-UV chip and composition-optimized Ba3BP3O12:Eu2+ and (Ba,Sr)(3)BP3O12:Eu2+ phosphors, respectively. The series of phosphors may serve as a promising green and bluish-white luminescent materials used in fabrication of near UV-based white pc-LEDs. (C) 2010 Optical Society of America
引用
收藏
页码:1888 / 1897
页数:10
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