A Study on the Luminescence and Energy Transfer of Single-Phase and Color-Tunable KCaY(PO4)2:Eu2+,Mn2+ Phosphor for Application in White-Light LEDs

被引：272

作者：

Liu, Wei-Ren ^{[1
]}

Huang, Chien-Hao ^{[2
]}

Yeh, Chiao-Wen ^{[3
]}

Tsai, Jen-Ching ^{[4
]}

Chiu, Yi-Chen ^{[2
]}

Yeh, Yao-Tsung ^{[2
]}

Liu, Ru-Shi ^{[3
]}

机构：

[1] Chung Yuan Christian Univ, Dept Chem Engn, R&D Ctr Membrane Technol, Chungli 32023, Taiwan

[2] Ind Technol Res Inst, Mat & Chem Res Labs, Hsinchu 300, Taiwan

[3] Natl Taiwan Univ, Dept Chem, Taipei 106, Taiwan

[4] Natl Tsing Hua Univ, Dept Mat Sci & Engn, Hsinchu, Taiwan

来源：

INORGANIC CHEMISTRY | 2012年 / 51卷 / 18期

关键词：

CE3+;

D O I：

10.1021/ic3007102

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Novel single-phased white light-emitting KCaY(PO4)(2):Eu2+,Mn2+ phosphors for light-emitting diode (LED) applications were synthesized by conventional solid-state reaction. The emission hue could be controlled by tuning the Eu2+/Mn2+ ratio via the energy transfer; the the emission hue of KCaY(PO4)(2):Eu2+,Mn2+ varied from blue (0.1853, 0.2627) to white-light (0.3350, 0.3203) and eventually to purple (0.3919, 0.2867). The mechanism of energy transfer from a sensitizer Eu2+ to an activator Mn2+ in KCaY(PO4)(2):Eu2+,Mn2+ phosphors was demonstrated to be an electric dipole-quadrupole interaction. Combining a NUV 405-nm chip and a white-emitting KCaY(PO4)(2):1%Eu2+,4%Mn2+ phosphor produced a white-light NUV LED, demonstrating CIE chromaticity coordinates of (0.314, 0.329) and a color temperature of 6507 K.

引用

页码：9636 / 9641

页数：6

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