Strong luminescence and efficient energy transfer in Eu~(3+)/Tb~(3+)-codoped ZnO nanocrystals

L. Luo; F.Y. Huang; G.S. Dong; H.H. Fan; K.F. Li; K.W. Cheah; J. Chen

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Strong luminescence and efficient energy transfer in Eu~(3+)/Tb~(3+)-codoped ZnO nanocrystals

机译：Eu〜（3 +）/ Tb〜（3+）掺杂的ZnO纳米晶体中的强发光和有效的能量转移

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Single crystalline Eu~(3+)/Tb~(3+)-codoped ZnO nanocrystals have been synthesized by using a simple co-precipitation method. Successful doping is realized so that strong green and red luminescence can be efficiently excited by ultraviolet and near ultraviolet radiation, demonstrating an efficient energy transfer from ZnO host to rare earth ions. The energy transfer from the ZnO host to Tb~(3+) in ZnO: Tb~(3+) samples and ZnO host to Eu~(3+) in the ZnO: Eu~(3+) samples under UV excitation are investigated. It is found that the red ~5D_0 → ~7F_2 emission of Eu~(3+) ions decreases with increasing temperature but the green ~5D_4 → ~7F_5 emission of Tb~(3+) ions increases with increasing temperature, implying a different energy transfer processes in the two samples. Moreover, energy transfer from Tb~(3+) ions to Eu~(3+) ions in ZnO nanocrystals is also observed by analyzing luminescence spectra and the decay curves. By adjusting the doping concentration, the Eu~(3+)/Tb~(3+)-codoped ZnO phosphors emit green and red luminescence with chromaticity coordinates near white light region, high color purity and high intensity, indicating that they are promising light-conversion materials and have potential in field emission display devices and liquid crystal display backlights.

机译：采用简单的共沉淀法合成了Eu〜（3 +）/ Tb〜（3+）共掺杂ZnO纳米晶。实现了成功的掺杂，从而可以通过紫外线和近紫外线辐射有效激发强烈的绿色和红色发光，这表明从ZnO主体到稀土离子的有效能量转移。研究了在紫外激发下ZnO：Tb〜（3+）样品中ZnO主体向Tb〜（3+）的能量转移以及ZnO：Eu〜（3+）样品中ZnO主体向Eu〜（3+）的能量转移。。发现Eu〜（3+）离子的红色〜5D_0→〜7F_2发射随温度升高而降低，而Tb〜（3+）离子的绿色〜5D_4→〜7F_5发射随温度升高而升高，表明能量不同。两个样品中的转移过程。此外，通过分析发光光谱和衰变曲线，还观察到了ZnO纳米晶体中从Tb〜（3+）离子向Eu〜（3+）离子的能量转移。通过调整掺杂浓度，掺有Eu〜（3 +）/ Tb〜（3+）的ZnO荧光粉发出绿色和红色发光，其色度坐标接近白光区域，高色纯度和高强度，表明它们是有前途的光-转换材料，并且在场发射显示设备和液晶显示器背光源中具有潜力。

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来源
《Optical Materials》 |2014年第11期|470-475|共6页
作者
L. Luo; F.Y. Huang; G.S. Dong; H.H. Fan; K.F. Li; K.W. Cheah; J. Chen;
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作者单位

School of Physics and Optoelectronic Engineering Guangdong University of Technology Guangzhou 510006 China;

Center for Advanced Luminescence Materials Department of Physics Hong Kong Baptist University Kowloon Tang Hong Kong;

Instrumental Analysis & Research Center Sun Yat-sen University Guangzhou 510275 China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
中图分类
关键词
Rare earth; ZnO; Efficient doping; Energy transfer;

机译：稀土;氧化锌;高效掺杂;能量转移;

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1. Strong luminescence and efficient energy transfer in Eu~(3+)/Tb~(3+)-codoped ZnO nanocrystals [J] . L. Luo, F.Y. Huang, G.S. Dong, Optical Materials . 2014,第nova期

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2. Ce~(3+),Tb~(3+),Eu~(3+),Mn~(2+)-doped and Codoped NaY_9(SiO_4)_6O_2 Phosphors: Luminescence, Energy Transfer, Tunable Color Properties [J] . Wenzhen Lv, Yongchao Jia, Wei Lu ECS Journal of Solid State Science and Technology . 2014,第2期

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3. Efficient Doping and Energy Transfer from ZnO to Eu~(3+) Ions in Eu~(3+)-Doped ZnO Nanocrystals [J] . L. Luo, F. Y. Huang, G. J. Guo, Journal of nanoscience and nanotechnology . 2012,第3期

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Strong luminescence and efficient energy transfer in Eu~(3+)/Tb~(3+)-codoped ZnO nanocrystals

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