Optical Properties and Energy Transfer of NaCaPO4:Ce3+,Tb3+ Phosphors for Potential Application in Light-Emitting Diodes

被引：164

作者：

Guo, Ning ^{[1
,2
]}

Song, Yanhua ^{[1
,2
]}

You, Hongpeng ^{[1
]}

Jia, Guang ^{[1
,2
]}

Yang, Mei ^{[1
,2
]}

Liu, Kai ^{[1
,2
]}

Zheng, Yuhua ^{[1
,2
]}

Huang, Yeju ^{[1
,2
]}

Zhang, Hongjie ^{[1
]}

机构：

[1] Chinese Acad Sci, State Key Lab Rare Earth Resource Utilizat, Changchun Inst Appl Chem, Changchun 130022, Peoples R China

[2] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

来源：

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY | 2010年 / 29期

基金：

中国国家自然科学基金;

关键词：

Terbium; Cerium; Phosphors; Luminescence; Energy transfer; LUMINESCENCE PROPERTIES; HIGHLY EFFICIENT; CE3+; TB3+; SYSTEM;

D O I：

10.1002/ejic.201000392

中图分类号：

O61 [无机化学];

学科分类号：

070301 [无机化学];

摘要：

NaCaPO4:Ce3+,Tb3+ phosphors were prepared by a solid-state reaction. Their luminescence properties reveal that an efficient energy transfer from the Ce3+ to Tb3+ ions occurs, and its mechanism is a resonant type by means of a dipole-quadrupole reaction. The critical distance of the energy transfer has been calculated by concentration-quenching and spectral-overlap methods. The varied emitted color of the phosphors from blue to yellow-greenish can be achieved by properly tuning the relative ratio of Ce3+ and Tb3+ through the energy transfer from the Ce3+ to Tb3+ ions. These results indicate that NaCaPO4:Ce3+,Tb3+ is potentially useful as a highly efficient, green-emitting, UV-convertible phosphor for white-light-emitting diodes. Moreover, the accurate oscillator strength ratio of the electric quadrupole-to-dipole transitions for the Tb3+ ion was obtained to be about 10(-3), which may be of much significance in the estimate of the critical distance of the dipole-quadrupole interaction between Ce3+ and Tb3+ ions through Dexter's energy-transfer theory.

引用

页码：4636 / 4642

页数：7

共 32 条

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