Efficient near-infrared quantum cutting by Ce3+-Yb3+ couple in GdBO3 phosphors

被引：39

作者：

Zhang Hao ^{[1
]}

Chen Jindeng ^{[1
]}

Guo Hai ^{[1
]}

机构：

[1] Zhejiang Normal Univ, Dept Phys, Jinhua 321004, Peoples R China

来源：

JOURNAL OF RARE EARTHS | 2011年 / 29卷 / 09期

基金：

中国国家自然科学基金;

关键词：

GdBO3:Ce3+; Yb3+; quantum cutting; cooperative energy transfer; downconversion; rare earths; UV EXCITATION; CE3+; DOWNCONVERSION; CONVERSION; YB3+; VUV;

D O I：

10.1016/S1002-0721(10)60549-2

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Ce3+ and Yb3+ co-activated GdBO3 phosphors were prepared by a conventional solid-state reaction method. X-ray powder diffraction, photoluminescent spectra and decay curves were used to characterize their structural and luminescent properties. An efficient near-infrared (NIR) quantum cutting (QC) from the phosphors was observed, which involved the emission of two low-energy NIR photons (around 971 nm) from an absorbed ultra-violet (UV) photon at 358 nm via a cooperative energy transfer (CET) from Ce3+ to Yb3+ ions. The theoretical quantum efficiency was calculated and the maximum efficiency approached up to 164% before reaching the critical concentration quenching threshold. Our results demonstrated that these phosphors might find potential application in improving the efficiency of silicon based solar cells.

引用

页码：822 / 825

页数：4

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