沉淀法制备ZnO:Eu^(3+)纳米晶及其发光性能的研究  

Preparation and Luminescence Characteristics of Eu-doped Nanocrystalline Zinc Oxide

作　　者：王玲玲[1] 赵世华[1] 刘晃清[1] 张进[1] 高明[1] 

机构地区：[1]湖南大学物理与微电子科学学院,湖南长沙410082

出　　处：《湖南大学学报（自然科学版）》2008年第7期51-54,共4页Journal of Hunan University:Natural Sciences

基　　金：湖南省自然科学基金资助项目(07JJ3114);高等学校博士学科点专项科研基金资助项目(20050532013)

摘　　要：分别以尿素、氨水作为沉淀剂,与Zn(NO3)2和Eu(NO3)3混合物反应,制备出不同尺寸的纳米ZnO:Eu3+晶.用X射线衍射仪(XRD)、扫描电子显微镜及荧光分光光度计对所制备的ZnO:Eu3+进行了分析.结果表明,以尿素为沉淀剂可以得到颗粒均匀、尺寸较小并且发光性能优良的ZnO:Eu3+纳米晶,主发射峰位置在611 nm处;随着Eu3+掺杂浓度的提高,ZnO:Eu3+粒径逐渐减小;利用均匀沉淀法(尿素为沉淀剂)制备的ZnO:Eu3+其发光性能优于直接沉淀法(氨水为沉淀剂)制备的ZnO:Eu3+.By using urea and ammonia as the precipitator, which reacted with zinc nitrate and europium nitrate, with the precipitation through filtration, drying and high temperature annealing, different ZnO： Eu^3＋ nanopowders were obtained. The results have indicated that, by using urea as the precipitator , the nanopowders ZnO： Eu^3＋obtained were quite symmetrical, smaller in size and better in luminescence property than those obtained by using ammonia as the precipitator. The main emission peak in ZnO：Eu^3＋ nanocrystals was 611 nm （the transition）. Meanwhile,with the increase of Eu-doped concentration, the grain size tended to decrease. So the luminescence properties of the sample prepared by using urea as the precipitator（homogeneous precipitation method） was better than that prepared by using ammonia（direct precipitation method）.

关 键 词：光致发光 纳米晶ZnO:Eu^3+ 稀土掺杂 直接沉淀 均匀沉淀 

分 类 号：O482.3[理学—固体物理]