Preparation,StructuralAnalysisandLuminescencePropertiesofNanocrystallinePhosphorGd2O3∶Eu

被引：1

作者：

徐美

董宁

孔庆妍

张慰萍

尹民

夏上达

机构：

[1] StructureResearchLaboratory,StructureResearchLaboratory,Departmentofphysics,Departmentofphysics,StructureResearchLaboratory,DepartmentofphysicsUniversityofScienceandTechnologyofChina,ChineseAcademyofSciences,Hefei,China,Departmentofphysics,UniversityofScie

来源：

Journal of Rare Earths | 2004年 / 01期

关键词：

optics; combustion synthesis; nanocrystalline Gd 2O3∶Eu; photoluminescence; concentration quenching; rare earths;

D O I：

暂无

中图分类号：

O482.3 [光学性质];

学科分类号：

070205 ; 0805 ; 080502 ; 0809 ;

摘要：

Nanocrystalline monoclinic and cubic Gd 2O 3∶Eu with different Eu 3+ concentration were prepared using glycine-nitrate combustion synthesis. By changing the ratio of glycine to nitrate and proper heat treatment, pure monoclinic and cubic Gd 2O 3∶Eu with particle size less than 40 nm can be easily formed. Under ultraviolet excitation, main emission of Eu 3+ ( 5D 0→ 7F 2) locates at 624 nm in monoclinic Gd 2O 3∶Eu and 611 nm in cubic sample. In excitation spectrum two broad bands corresponding to the host absorption and charge transfer state (CTS) and f-f transitions of Gd 3+ and Eu 3+ were observed and discussed. The quenching concentration of monoclinic and cubic Gd 2O 3∶Eu is 10% and 15%, respectively, both of which are much higher than that of bulk Gd 2O 3∶Eu.

引用

页码：40 / 44

页数：5