Phase structure and temperature dependent luminescence properties of Sr_2LiSiO_4F:Eu^(2+) and Sr_2MgSi_2O_7:Eu^(2+) phosphors  

作　　者：夏志国 孙家跃 廖立兵 杜海燕 

机构地区：[1]School of Materials Sciences and Technology, China University of Geosciences [2]College of Chemistry and Environmental Engineering, Beijing Technology and Business University

出　　处：《Journal of Rare Earths》2010年第6期874-877,共4页稀土学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (51002146, 20876002, 20976002);Natural Science Foundation of Beijing (2082009, 2091002);the Ph.D. Programs Foundation of Ministry of Education of China (20090022120002);the Fundamental Research Funds for the Central Universities (2010ZY35)

摘　　要：Green-emitting Sr2LiSiO4F:Eu2+ and blue-emitting Sr2MgSi2O7:Eu2+ phosphors were synthesized by the conventional high temperature solid-state route, respectively. Their structures and photoluminescence properties were comparatively investigated. It was found that the mixture phases of Sr2MgSi2O7 and SrF2 were obtained when a part of Sr2+ in Sr2LiSiO4F was replaced by some amount of Mg2+ in order to design the possible SrMgLiSiO4F:Eu2+ phosphor. Based on the photoluminescence analysis, Sr2LiSiO4F:Eu2+ phosphor exhibited a green broad emission band of main peak at 513 nm under the excitation of 365 nm, while the Sr2MgSi2O7:Eu2+ and SrMgLiSiO4F:Eu2+ phosphor showed blue emission centered at 467 nm. The temperature dependent photoluminescence properties and room temperature decay time for the three kinds of phosphors were also discussed in this paper.Green-emitting Sr2LiSiO4F:Eu2+ and blue-emitting Sr2MgSi2O7:Eu2+ phosphors were synthesized by the conventional high temperature solid-state route, respectively. Their structures and photoluminescence properties were comparatively investigated. It was found that the mixture phases of Sr2MgSi2O7 and SrF2 were obtained when a part of Sr2+ in Sr2LiSiO4F was replaced by some amount of Mg2+ in order to design the possible SrMgLiSiO4F:Eu2+ phosphor. Based on the photoluminescence analysis, Sr2LiSiO4F:Eu2+ phosphor exhibited a green broad emission band of main peak at 513 nm under the excitation of 365 nm, while the Sr2MgSi2O7:Eu2+ and SrMgLiSiO4F:Eu2+ phosphor showed blue emission centered at 467 nm. The temperature dependent photoluminescence properties and room temperature decay time for the three kinds of phosphors were also discussed in this paper.

关 键 词：chlorosilicate white LED PHOSPHOR rare earths 

分 类 号：O614.33[理学—无机化学]