Chen Li, Zhang Jiahua, Zhang Xianmin, Liu Feng, Wang Xiaojun
Key Laboratory of Excited State Processes, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China.
Opt Express. 2008 Aug 4;16(16):11795-801. doi: 10.1364/oe.16.011795.
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.
在还原条件下合成了Eu3+、Li+共掺杂的ZnO:Zn荧光粉，该荧光粉在近紫外光间接激发下具有强烈的Eu3+发射。测量了稳态和时间分辨光致发光以及漫反射光谱，以研究发光特性。结果表明，存在从ZnO主体到Eu3+离子的显著能量转移。一系列作为激发能量临时存储的能级在该能量转移过程中起关键作用。与纯Eu2O3相比，根据发射光谱和激发光谱区分了Eu3+、Li+共掺杂的ZnO:Zn中的两种Eu3+位点。
