Eu^3＋掺杂纳米ZnO的制备和发光特性研究  

Synthesis and Photoluminescence of Eu-Doped ZnO Nanopowder

作　　者：张琳丽[1] 凌亚文[1] 张玲[1] 史彭[1] 

机构地区：[1]西安建筑科技大学

出　　处：《稀有金属材料与工程》2008年第2期370-373,共4页Rare Metal Materials and Engineering

摘　　要：用固相反应法制备ZnO:Eu3+纳米粉末,研究其发光特性。观察到从基质ZnO到Eu3+的能量传递现象。研究表明,不论是ZnO基质的激子激发还是Eu3+的高能态激发,随着Eu3+浓度从0.1mol%增加到1mol%,Eu3+的发射增强。在基质激子的激发下,ZnO:Eu3+纳米粉末产生了很强的Eu3+红色特征发射而没有ZnO的宽带发光。结果表明,ZnO:Eu3+纳米粉末的XRD谱中不存在可观测到的Eu2O3杂相,激发光谱中出现ZnO的带间激发与纯Eu2O3的激发光谱不同,这几方面说明了Eu3+进入了ZnO的晶格中。ZnO：Eu^3＋ nanopowder was prepared by solid state reaction. The photoluminescence was detected and energy transfer from host to Eu^3＋ions was observed. With increasing of doping concentration of Eu^3＋ from 0.1 mol% to 1 mol%, the luminescence intensity from Eu^3＋ becomes strong no matter whether UV excitation or the high-energy state excitation of Eu^3＋ was adopted. Under the UV excitation, Eu^3＋-doped ZnO nanopowder induced the strong red luminescence from the Eu^3＋ ions with the complete quenching broad emission. XRD patterns show that there is no observeable Eu2O3 hybrid phases. From the ZnO interband excitation in excitation spectrum of ZnO：Eu^3＋ nanopowder and the difference of the exciton spectra of ZnO：Eu^3＋ and pure Eu2O3 and XRD patterns, it is showed that Eu^3＋ ions insert into the crystal lattice of ZnO in the as-synthesized samples.

关 键 词：ZNO EU^3+ 光致发光 能量传递 

分 类 号：O482.31[理学—固体物理]