Enhanced White Luminescence in Mixed-Valence Eu-Doped BaAl2Si2O8 Glass Ceramics for W-LEDs
Enhanced White Luminescence in Mixed-Valence Eu-Doped BaAl2Si2O8 Glass Ceramics for W-LEDs
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用于 W-LED 的混合价 Eu 掺杂 BaAl2Si2O8 玻璃陶瓷的增强白光发光
DOI：
10.1149/2.jes113286
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发表时间：
2012
影响因子：
3.9
通讯作者：
Ma, ChongGeng
中科院分区：
文献类型：
--
作者：
Guo, Hai;Liu, XueYun;Li, Fang;Wei, RongFei;Wei, YunLe;Ma, ChongGeng
采用空气熔融淬冷法制备了Eu3+和Eu2+共掺杂的BaAl2Si2O8铝硅酸盐玻璃和微晶玻璃，通过激发光谱、发射光谱和寿命测试研究了它们的发光性能。玻璃陶瓷中Eu3+和Eu2+的发光强度分别比前驱体玻璃中的增强了约9倍和20倍。在380 nm激发下，Eu3+的红光发射和Eu2+的蓝绿光发射结合在一起，得到了色坐标为X= 0.333，Y = 0.307的白色光。结果表明，混合价态Eu掺杂BaAl2Si2O8微晶玻璃是一种很有潜力的白光LED荧光粉。
Eu 3+ and Eu 2+ co-doped aluminosilicate glass and glass ceramics containing BaAl 2 Si 2 O 8 were prepared by melt-quenching technique in air and their luminescent properties were investigated by excitation, emission spectra and lifetime measurement. Intensities of Eu 3+ and Eu 2+ emissions in glass ceramics were enhanced by about 9 and 20 times compared to that in precursor glass, respectively. More interesting, under 380 nm excitation, a perfect white light with chromaticity coordinates (X= 0.333, Y= 0.307) was achieved for glass ceramics by combining intense red emission of Eu 3+ with broad blue-green emission of Eu 2+. Our results indicate that mixed-valence Eu-doped BaAl 2 Si 2 O 8 glass ceramics may be used as potential phosphors for W-LEDs.
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