掺铕纳米氧化锌的制备及其发光性质

以尿素为沉淀剂，与可溶性硝酸锌、硝酸铕反应制备纳米晶ZnO:Eu3+³⁺，通 过x射线粉末衍射、透射电子显微镜对纳米粒子的组成、结构、形貌及尺寸进行了分析和测定.研究 结果表明，制得的纳米粒子粒度均匀，粒径分布窄，最小粒径为8nm.详细研究了不同制备 方法、不同掺杂浓度及不同粒度等对ZnO:Eu3+³⁺发光性质的影响.为探讨纳米 掺杂材料的制备技术及发光方面的应用提供了可行的方法. 关键词： 光致发光 3+')" href="#">纳米晶ZnO:Eu3+³⁺ 均匀沉淀法

Preparation and luminescence characteristics of Eu-doped nanocrystalline zinc o xide

The urea has been used as a precipitant agent to react with soluble Zn2+^{2+< /sup> salt and Eu3+3+ salt for preparing ZnO:Eu3+3+ nanocrystals. The particle size, the crystal structure and morphology of the nan ocrystalline ZnO:Eu3+3+ were characterized by x-ray diffractio n and transmission electron micrograph. Narrow-sized, finely dispersed nanocrys talline ZnO:Eu3+3+ with a small size about 8nm has been obtained by homogeneous precipitation method. By using different preparation methods, obtai ning different dimensions of crystals with different doping concentrations, the luminescence characteristics of nanocrystalline ZnO:Eu3+3+ were stu died. The results indicate that the homogeneous precipitation method is a kind o f superior preparation technique for nano-size doped materials, and also demons trate the feasibility of nanocrystalline ZnO:Eu3+3+ for luminescent applications.}