Thermally Stable Pyrochlore Y2Ti2O7: Eu3+ Orange-Red Emitting Phosphors

被引：40

作者：

Dai, Pengpeng ^{[1
]}

Zhang, Xintong ^{[1
]}

Zhou, Meng ^{[1
]}

Li, Xinghua ^{[1
]}

Yang, Jikai ^{[1
]}

Sun, Panpan ^{[1
]}

Xu, Changshan ^{[1
]}

Liu, Yichun ^{[1
]}

机构：

[1] NE Normal Univ, Ctr Adv Optoelect Funct Mat Res, Key Lab UV Emitting Mat & Technol, Minist Educ, Changchun 130024, Peoples R China

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2012年 / 95卷 / 02期

关键词：

RARE-EARTH; PHOTOLUMINESCENCE; A(2)TI(2)O(7); LUMINESCENCE; SPECTRA; STATES;

D O I：

10.1111/j.1551-2916.2011.04804.x

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Pyrochlore-structured Y2Ti2O7 doped with Eu3+ activators via high-temperature solid-state reaction shows thermally stable orange-red emission under near ultraviolet excitation. The concentration of Eu3+ activators was observed to influence both the intensity and color point of photoluminescence of Y2-xTi2O7:xEu(3+) phosphors. The optimal doping concentration is around x = 0.45 determined by photoluminescence intensity; at this concentration, the luminescence branch ratio R/O = I(D-5(0) - F-7(2))/I(D-5(0) - F-7(1)), named as the luminous intensity ratio of D-5(0)-F-7(2) (R) and D-5(0)-F-7(1) (O) transition is also at maximum, about 0.46. This orange-red emitting phosphor Y1.55Ti2O7:0.45Eu(3+) shows excellent thermal stability in luminescence intensity, retaining 84% of room-temperature luminescence at 250 degrees C. Therefore, Y1.55Ti2O7:0.45Eu(3+) phosphors may have great potential as an orange-red component for white light-emitting diodes, especially for the high-power devices.

引用

页码：658 / 662

页数：5

共 36 条

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