Preparation and luminescence properties of Eu^(2+)-doped CASN-sinoite multiphase system for LED  

作　　者：申颖 庄卫东 刘元红 何华强 何涛 

机构地区：[1]National Engineering Research Center for Rare Earth Materials,Grirem Advanced Materials Co.Ltd.,General Research Institute for Nonferrous Metals

出　　处：《Journal of Rare Earths》2010年第S1期289-291,共3页稀土学报（英文版）

基　　金：Project supported by the Ministry of Science and Technology of China (2006AA03A133,2006CB601104);the Ministry of Industry and Information Technology of China ([2009]453);the Natural Science Foundation of Beijing (2102022)

摘　　要：A series of Eu2+-doped CASN-sinoite multiphase system with a formula of(CaAlSiN3)(1-x)-(Si2N2O)x were successfully synthesized by the high temperature solid-state method.The crystal structure and morphology of the phosphors and their photoluminescence(PL) were investigated.For the Eu2+-doped samples the PL intensity approached its maximum when the molar ratio of Si2N2O in the samples was about 0.15.With increase of the concentration of Si2N2O,the emission peak shifted from 645 to 605 nm.It was because the spectroscopic polarizability(αsp) became smaller with the increase of Si/Al ratio or the adding of O atoms,which caused the change of crystal field strength.In addition,the full width at half maximum(FWHM) widened with the increase of x value,which was favor of the improvement of the color rendering index.A series of Eu2+-doped CASN-sinoite multiphase system with a formula of(CaAlSiN3)(1-x)-(Si2N2O)x were successfully synthesized by the high temperature solid-state method.The crystal structure and morphology of the phosphors and their photoluminescence(PL) were investigated.For the Eu2+-doped samples the PL intensity approached its maximum when the molar ratio of Si2N2O in the samples was about 0.15.With increase of the concentration of Si2N2O,the emission peak shifted from 645 to 605 nm.It was because the spectroscopic polarizability(αsp) became smaller with the increase of Si/Al ratio or the adding of O atoms,which caused the change of crystal field strength.In addition,the full width at half maximum(FWHM) widened with the increase of x value,which was favor of the improvement of the color rendering index.

关 键 词：LED CASN-sinoite multiphase system luminescence properties structure rare earths 

分 类 号：TQ422[化学工程]