Incorporation of Si-Ninducing white light of SrAl_2Si_2O_8:Eu^(2+),Mn^(2+) phosphor for white light emitting diodes  

作　　者：郑玺 费沁妮 毛智勇 刘艳花 蔡毅 陆启飞 田华 王达健 

机构地区：[1]School of Materials Science and Engineering, Tianjin University of Technology [2]Key Laboratory of Display Materials and Photoelectric Devices of Ministry of Education, Tianjin University of Technology [3]Tianjin Key Laboratory for Photoelectronic Materials and Devices

出　　处：《Journal of Rare Earths》2011年第6期522-526,共5页稀土学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (50802062, 21076161, 50872091);Key Discipline of Materials Physics and Chemistry (Tianjin, China) (2006ZD30)

摘　　要：Photoluminescence （PL） and colorimetric properties of white-light emission SrAl2Si2O8：Eu2＋,Mn2＋ phosphor were tuned effectively through incorporating Si–N bond to the host in the form of Si3N4. A maximum solubility of Si–N bond in SrAl2–xSi2＋xO8–xNx was estimated theoretically to be in a value of x=1.0. Under 365 nm irradiation, a distinct red-shift of blue band emission from 406 to 473 nm for Eu2＋ and an enhancement of yellow band emission peaked at ~565 nm for Mn2＋ were observed with the increase of Si–N content. These effects resulted from partial substitution of Si–N for Al1–O1 and Al4–O2 sites in SrAl2Si2O8 lattice. Eventually, a white emission with CIE chromaticity coordinates （0.287, 0.337） and color rendering index （CRI） 78.3 for SrAl2Si2O8：Eu2＋,Mn2＋ phosphor were achieved upon optimization to a suitable amount of Si–N.Photoluminescence （PL） and colorimetric properties of white-light emission SrAl2Si2O8：Eu2＋,Mn2＋ phosphor were tuned effectively through incorporating Si–N bond to the host in the form of Si3N4. A maximum solubility of Si–N bond in SrAl2–xSi2＋xO8–xNx was estimated theoretically to be in a value of x=1.0. Under 365 nm irradiation, a distinct red-shift of blue band emission from 406 to 473 nm for Eu2＋ and an enhancement of yellow band emission peaked at ~565 nm for Mn2＋ were observed with the increase of Si–N content. These effects resulted from partial substitution of Si–N for Al1–O1 and Al4–O2 sites in SrAl2Si2O8 lattice. Eventually, a white emission with CIE chromaticity coordinates （0.287, 0.337） and color rendering index （CRI） 78.3 for SrAl2Si2O8：Eu2＋,Mn2＋ phosphor were achieved upon optimization to a suitable amount of Si–N.

关 键 词：PHOSPHORS PHOTOLUMINESCENCE red shift white-light-emitting diode rare earths 

分 类 号：TN104.3[电子电信—物理电子学]