Optical properties of trivalent europium doped ZnO:Zn phosphor under indirect excitation of near-UV light.
Optical properties of trivalent europium doped ZnO:Zn phosphor under indirect excitation of near-UV light.
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DOI：
10.1364/oe.16.011795
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发表时间：
2008-08
期刊：
影响因子：
3.8
通讯作者：
Li Chen;Jiahua Zhang;Xianmin Zhang;Feng Liu;Xiaojun Wang
中科院分区：
文献类型：
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作者：
Li Chen;Jiahua Zhang;Xianmin Zhang;Feng Liu;Xiaojun Wang
在还原条件下合成了 Eu3+、Li+ 共掺杂 ZnO:Zn 荧光粉，在近紫外光间接激发下具有强烈的 Eu3+ 发射。测量稳态和时间分辨光致发光和漫反射光谱以研究发光特性。结果表明，存在从 ZnO 主体到 Eu3+ 离子的显着能量转移。一系列能级作为激发能量的临时存储在这个能量传递过程中发挥着至关重要的作用。与纯 Eu2O3 相比，根据发射光谱和激发光谱区分了 Eu3+、Li+ 共掺杂 ZnO:Zn 中的两种 Eu3+ 位点。
Eu3+, Li+-codoped ZnO:Zn phosphor with intense Eu3+ emissions upon indirect excitation of near-UV light has been synthesized under reducing condition. Steady-state and time-resolved photoluminescence and diffuse reflectance spectra are measured to investigate properties of the luminescence. The results suggest that there exists prominent energy transfer from ZnO host to Eu3+ ions. A series of energy levels as temporary storage of excitation energy play a crucial role on this energy transfer process. Two kinds of Eu3+ sites in Eu3+, Li+-codoped ZnO:Zn are distinguished based on the emission and excitation spectra in comparison with pure Eu2O3.