Ag掺杂ZnO纳米晶的发光特性  

Photoluminescent Properties of Ag-Doped ZnO Nanocrystalline

作　　者：谢友海[1,2] 汪应灵[3] 刘海津[1,2] 刘国光[1,2] 

机构地区：[1]河南师范大学化学与环境科学学院 [2]黄淮水环境与污染防治省部共建教育部重点实验室,河南新乡453007 [3]新乡医学院化学教研室,河南新乡453003

出　　处：《河南师范大学学报（自然科学版）》2010年第3期105-107,共3页Journal of Henan Normal University(Natural Science Edition)

基　　金：河南省基础与前沿技术研究计划项目(092300410105;102300410101);河南省教育厅自然科学研究计划项目(2008A610007;2009A610008);新乡市科技计划项目(09S070)

摘　　要：以Zn(NO3)3.6 H2O,AgNO3为原料,明胶为模板分散剂,采用凝胶模板燃烧法制备纯ZnO和ZnO∶Ag纳米晶,利用XRD,SEM,TEM和PL谱对样品的结构和性能进行了研究.结果表明∶掺杂前后产物粒子形状均为球形,结晶良好,属六方晶系结构且无杂相;Ag占据部分Zn格位或填隙位进入ZnO晶格,掺入量约为1%(摩尔分数);纯ZnO平均粒径约为40 nm,掺杂样品的平均粒径约为45 nm,Ag掺杂轻微地影响ZnO晶粒生长.PL谱显示Ag掺杂能够调整ZnO纳米晶的能带结构?提高表面态含量,进而使得ZnO:Ag纳米晶的可见发光能力显著增强.Pure and Ag-doped ZnO nanocrystalline have been successfully synthesized by means of gel-template combustion process using Zn（NO3）2·6H2O and AgNO3 as raw material and gelatin as a based template dispersant.The structure and properties of the as-synthesized samples were characterized by using XRD,SEM,TEM and PL techniques.The results show that the hexagonal products appear to be regularly spherical and the crystallinities are good.Ag＋ substituted Zn or gap positions to incorporate into nanocrystalline,the dopant content is about 1%（mole fraction）.The average particle sizes of pure ZnO nanocrystalline are about 40 nm,whereas the corresponding parameters of doped ZnO are respectively about 45 nm.This indicates that Ag doping could influence the growth of ZnO nanocrystalline.In addition,the Ag doping could tune the energy level structure and enrich the surface states of ZnO nanocrystalline,which leads to a stronger green emission peak at around 484 nm and 495 nm.

关 键 词：ZNO纳米晶 AG掺杂 凝胶模板燃烧法 光致发光 

分 类 号：O614[理学—无机化学]