一类新的红色荧光粉MY_2S_4:Er^(3+)(M=Sr^(2+),Ba^(2+))的合成与表征  

Synthesis and Characterization of A Novel Red Phosphor MY_2S_4:Er^(3+)(M=Sr^(2+),Ba^(2+))

作　　者：廉世勋[1] 田科明[1] 尹笃林[1] 朱爱玲[1] 刘利民[1] 

机构地区：[1]湖南师范大学化学化工学院,长沙410081

出　　处：《高等学校化学学报》2007年第6期1024-1026,共3页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:20371017);湖南省科技厅基金(批准号:06FJ3095)资助

摘　　要：Carbonate coprecipitate precursors were prepared by mixed nitrate solutions containing M2+(M2+=Sr2+,Ba2+),Y3+ and Er3+ as the cation sources and(NH4)2CO3 as the precipitator.MY2S4:Er3+ phosphors were synthesized by calcining the carbonate precursors with CS2 as the sulfurization reagent at 1050 ℃ for 4 h.XRD patterns show that the synthesized SrY2S4 and BaY2S4 crystalline powders possess the orthorhombic [CaFe2O4]-type structure.Photoluminescent measurements indicate that there were mainly red emitting(4F9/2→4I15/2) and green emitting(2H11/2→4I15/2 and 4S3/2→4I15/2) of Er3+ in the SrY2S4 while there was only red emitting(4F9/2→4I15/2) in BaY2S4:Er3+.BaY2S4:Er3+ is considered as a novel red phosphor candidate with a high monochromaticity.Carbonate coprecipitate precursors were prepared by mixed nitrate solutions containing M^2＋（ M^2＋ = Sr^2＋, Ba^2＋） , y^3＋ and Er^3＋ as the cation sources and （ NH4 ）2CO3 as the precipitator. MY2S4： Er^3＋ phosphors were synthesized by calcining the carbonate precursors with CS2 as the sulfurization reagent at 1050 °C for 4 h. XRD patterns show that the synthesized SrY2S4 and BaY2S4 crystalline powders possess the ortho-rhombic [CaFe204]-type structure. Photoluminescent measurements indicate that there were mainly red emit-ting （ ^4F9/2→^4I15/2 ） and green emitting（^2H11/2→^4I15/2 and ^4S3/2→^4I15/2 ） of Er^3＋ in the SrY2S4 while there was only red emitting（^4F9/2→^4I15/2 ） in BaY2S4： Er^3＋.BaY2S4： Er^3＋ is considered as a novel red phosphor candi-date with a high monochromaticity.

关 键 词：碱土-稀土硫化物 铒离子 红色荧光粉 单色性 

分 类 号：O614[理学—无机化学]