Photoluminescence studies of Eu2+-Yb3+ co-doped BaMgAl10O17 phosphor synthesized by the combustion method

被引：11

作者：

Wu Lingyuan ^{[1
]}

Tian Xiuna ^{[1
]}

Wei Xiantao ^{[1
]}

Chen Yonghu ^{[1
]}

Yin Min ^{[1
]}

机构：

[1] Univ Sci & Technol China, Dept Phys, Hefei 230026, Peoples R China

来源：

JOURNAL OF RARE EARTHS | 2012年 / 30卷 / 12期

基金：

中国国家自然科学基金;

关键词：

BAM; combustion method; downconversion; energy transfer; rare earths; QUANTUM; YB3+; LUMINESCENCE; EU2+; ION;

D O I：

10.1016/S1002-0721(12)60208-7

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

BaMgAl10O17:Eu2+, Yb3+ was investigated as a possible quantum cutting system to enhance solar cells efficiency. Phosphors were synthesized by combustion method and composed of nanorods. Photoluminescence spectra showed that Eu in the sample was reduced to bivalence while Yb remained trivalence. Through a cooperative energy transfer process, the obtained powders exhibited both blue emission of Eu2+ (around 450 nm) and near infrared emission of Yb3+ (around 1020 nm) under broad band excitation (250-410 nm) originating from 4f -> 5d transition of Eu2+. Energy transfer phenomenon between the sensitizer Eu2+ and the activator Yb3+ was investigated via the luminescent spectra and the decay curves of Eu2+ with different Yb3+ concentrations. Results indicated that energy transfer efficiency from Eu2+ to Yb3+ was not high. The poor efficiency can be explained by the long distance between rare earth ions.

引用

页码：1213 / 1216

页数：4

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