【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。更多还原

【Abstract】 ZnO:Eu3+ nanopowder was prepared by solid state reaction. The photoluminescence was detected and energy transfer from host to Eu3+ions was observed. With increasing of doping concentration of Eu3+ from 0.1 mol% to 1 mol%, the luminescence intensity from Eu3+ becomes strong no matter whether UV excitation or the high-energy state excitation of Eu3+ was adopted. Under the UV excitation, Eu3+-doped ZnO nanopowder induced the strong red luminescence from the Eu3+ 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:Eu3+ nanopowder and the difference of the exciton spectra of ZnO:Eu3+ and pure Eu2O3 and XRD patterns, it is showed that Eu3+ ions insert into the crystal lattice of ZnO in the as-synthesized samples.更多还原