中文摘要：

在还原气氛下利用高温固相反应法制备了Eu^3＋，Li^＋共掺杂的ZnO：Zn荧光粉。在近紫外光激发基质条件下，该荧光粉材料具有强的来自Eu^3＋的4f组态内跃迁线状发射及来自基质缺陷相关的绿色可见宽带发射。测量了稳态光谱，漫反射及时间分辨光谱以研究该材料的发光性质及基质向稀土离子的能量传递过程。在还原气氛下因在导带下形成了一系列浅施主能级，暂时储存激发能，施主中心浓度增加使得基质向稀土离子的能量传递效率增强。通过与纯Eu2O3粉末的光谱对比分析，确定了在此材料体系中存在处于两种局域环境的Eu^3＋。由于在近紫外区的强且有效的吸收，此材料有望成为应用于近紫外激发发光二极管的新型荧光粉。

英文摘要：

Eu^3＋ -Li^＋ -codoped ZnO：Zn phosphor with intense sharp line emissions from Eu^3＋ 4f intra-configurational transitions and broad green emission band from defect-related luminescent centers upon indirect exaltation 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 is a prominent energy transfer from ZnO host to Eu^3＋ ions. A series of shallow donor energy levds as temporary storage of excitation energy play a crudal role on this energy transfer process. The energy transfer effidency can be enhanced by these additional shallow donors. Two kinds of local environments for Eu^3＋ in Eu^3＋ -Li^＋ -codoped ZnO：Zn are distinguished based on the emission and excitation spectra in comparison with pure Eu2 O3. Such phosphor will be a promising candidate employed in the white light-emitting diodes based on the near-UV pumping.