CeO_x与ZnO纳米复合粉体的制备及其发光性能  

Preparation and Luminescence of CeO_x/ZnO Nanocomposite Powders

作　　者：郭书霞[1] 张兴堂[1] 赵慧玲[1] 李蕴才[1] 黄亚彬[1] 杜祖亮[1] 

机构地区：[1]河南大学特种功能材料重点实验室,河南开封475001

出　　处：《光谱学与光谱分析》2005年第6期840-843,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金(90306010;20371015);"973"前期专项(2002CCC02700)资助课题

摘　　要：通过溶胶凝胶法制备CeOx ZnO纳米复合粉体,并对其结构和光致发光特性进行了研究。发现5 0 0℃烧结出的复合粉体在5 0 2nm处的绿光发射同纯ZnO的相比有显著的增强;6 0 0℃烧结的样品在6 0 3nm出现新的发光峰。通过XRD和XPS分析认为荧光增强的主要原因同粉体中铈主要以Ce3+ 形式存在有关,新的发光峰可能来源于ZnO CeO2 界面处形成的新的能级跃迁。CeOx/ZnO nanocomposite powders were prepared by sol-gel process. The powder samples were examined by XRD, TEM, XPS and photoluminescence (PL). PL enhancement of nanocomposite powder at 502 nm compared to pure ZnO was observed when Ce3+ were present in samples. New peak at 603 nm was observed when Ce4+ were present PL enhancement of nanocomposite powder was correlated with more oxygen vacancies which were caused by Ce3+. The new peak at 603 nm is attributed to new energy transition in the interface of CeO2/ZnO.

关 键 词：ZRO 复合粉体 发光 

分 类 号：O612[理学—无机化学]