Eu^(3+)掺杂MMoO_4(M=Ca,Sr)荧光粉的表征及发光性质  

Characterization and Photoluminescence Properties of Eu^(3+)-doped MMoO_4(M=Ca,Sr) Phosphors

作　　者：余方以[1,2] 赵智[1] 蒋成颍[3] 杨晴[1,2] 

机构地区：[1]中国科学技术大学合肥微尺度物质科学国家实验室,合肥230026 [2]中国科学技术大学化学系,合肥230026 [3]中国科学技术大学物理系,合肥230026

出　　处：《光散射学报》2011年第3期283-288,共6页The Journal of Light Scattering

基　　金：国家自然科学基金(21071136)

摘　　要：本文采用简易的Pechini方法制备了Eu3+掺杂MMoO4(M=Ca,Sr)红色荧光粉。产物的结构、形貌和性质分别通过X射线衍射(XRD)、扫描电子显微镜(SEM)、光致发光发射谱(PL)和激发谱(PLE)进行表征分析。XRD表明反应得到了纯相目标掺杂产物,SEM照片显示两种体系掺杂产物形貌均匀性不同,Eu3+掺杂CaMoO4尺寸小、比表面积大。光致发光光谱结果显示强的614 nm波长的发射,其源于Eu3+离子的5D0→7F2跃迁。在掺杂浓度范围内我们观察到从基质到Eu3+离子的能量转移及浓度猝灭效应。实验得到掺杂浓度为7.5 mol%的CaMoO4:Eu3+表现出良好的发光性质,它将在荧光粉转换型白光LED中有着潜在的应用。Eu3＋-doped MMoO4（M = Ca,Sr） red phosphors have been prepared by the facile Pechini method.The structures,morphologies,and properties of the obtained samples were characterized by X-ray diffraction（XRD）,scanning electron microscopy（SEM）,photoluminescence emission spectra（PL） and excitation spectra（PLE）,respectively.XRD results imply that we obtain target products with no impurities.SEM images show that two doping system samples perform different morphology uniformities and Eu3＋-doped CaMoO4 samples have small size and high specific surface area.PL results show strong emission at 614 nm originating from the 5D0→7F2 transition of Eu3＋ ions.We observe the energy transfer from the substrate to Eu3＋ ions and concentration quenching effect under the doping range.CaMoO4：Eu3＋ with the doping content as 7.5 mol% performs good photoluminescence properties,which would have potential applications in phosphor-converted white light-emitting diodes（LEDs）.

关 键 词：Eu3+掺杂 钼酸钙 Pechini方法 光致发光 能量转移 

分 类 号：O482.31[理学—固体物理]