A New Method of Calculating Trap Depth of Rare Earth Materials  

作　　者：王丽伟 徐征 滕枫 姜薇薇 张福俊 孟立建 

机构地区：[1]Institute of Optoelectronics, Beijing Jiaotong University, Beijing 100044, China [2]Departamento de Fisica, Instituto Superior de Engenharia do Porto, Porto, 4200-072, Portugal [3]Postdoctoral Working Station of Tianjin University, Postdoctoral Working Station of Zhong-huan San-Jin Ltd., Tianjin Economy and Technological Development Area, Tianjin 300457, China [4]Departamento

出　　处：《Journal of Rare Earths》2005年第6期672-675,共4页稀土学报（英文版）

基　　金：ProjectsupportedbytheNationalNaturalScienceFoundationsofChina(10374001;10434030);973(2003CB314707);Chi-naPostdoctoralScienceFoundation(2003034324);andtheNaturalScienceFoundationsofBeijing(2032015)

摘　　要：The mainly characteristic of trapping materials is the trap depth. So it is significant to calculate the trap depth for the trapping materials. A new method of calculating trap depth, which is based on energy band and using rate equations to analyze thermoluminescence, was brought forward. This method which uses the rate equations of the process and the thermoluminescence curve can replace traditional methods such as first order or second order kinetics. The trap depth of SrAl2O4：Eu^2＋ , Dy^3＋ and Sr4Al14O25：Eu^2＋ , Dy^3＋ was estimated from the glow curve. Then the numerical solution of the trap depth can be obtained. From the results of experiments and calculations, this method can accurately indicate the whole process.The mainly characteristic of trapping materials is the trap depth. So it is significant to calculate the trap depth for the trapping materials. A new method of calculating trap depth, which is based on energy band and using rate equations to analyze thermoluminescence, was brought forward. This method which uses the rate equations of the process and the thermoluminescence curve can replace traditional methods such as first order or second order kinetics. The trap depth of SrAl2O4：Eu^2＋ , Dy^3＋ and Sr4Al14O25：Eu^2＋ , Dy^3＋ was estimated from the glow curve. Then the numerical solution of the trap depth can be obtained. From the results of experiments and calculations, this method can accurately indicate the whole process.

关 键 词：luminescence kinetics THERMO-LUMINESCENCE trap depth rare earths 

分 类 号：TG146.45[一般工业技术—材料科学与工程]