Luminescent properties of blue emitting phosphor SrZn_2(PO_4)_2:Eu^(2+) for white LEDs  

作　　者：陆伟 刘宇飞 王颖 王志军 庞立斌 

机构地区：[1]Tangshan Vocational & Technical College [2]Library, Hebei University [3]College of Physics Science & Technology, Hebei University [4]Department of Foreign Language Teaching and Research, Hebei University

出　　处：《Optoelectronics Letters》2015年第6期426-429,共4页光电子快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.50902042);the Natural Science Foundation of Hebei Province of China(Nos.A2014201035 and E2014201037);the Education Office Research Foundation of Hebei Province of China(Nos.ZD2014036 and QN2014085)

摘　　要：Blue emitting phosphor SrZn_2(PO_4)_2:Eu^(2+) is synthesized by a high temperature solid state method,and the luminescent properties are investigated.At the 330 nm radiation excitation,SrZn_2(PO_4)_2:Eu^(2+) presents an emission band at 416 nm,which is assigned to the 4f^65d^1→4f^7 transition of Eu^(2+) ion.The concentration quenching effect of Eu^(2+) in SrZn_2(PO_4)_2has been validated and proved to be a resonant type via a dipole-dipole interaction.The critical distance(R_c) of Eu^(2+) in SrZn_2(PO_4)_2 is calculated to be 3.244 nm.The Commission International de I'Eclairage(CIE) chromaticity coordinates of SrZn_2(PO_4)_2:Eu^(2+) locate at the blue region,such as(0.150,0.072).The results indicate that the SrZn_2(PO_4)_2:Eu^(2+)phosphor may have potential applications in white light emitting diodes(LEDs).Blue emitting phosphor SrZn2（PO4）2：Eu2＋ is synthesized by a high temperature solid state method, and the luminescent properties are investigated. At the 330 nm radiation excitation, SrZn2（PO4）E：EU2＋ presents an emission band at 416 nm, which is assigned to the 4f65d1→4f7 transition of Eu2＋ ion. The concentration quenching effect of Eu2＋ in SrZnE（PO4）2 has been validated and proved to be a resonant type via a dipole-dipole interaction. The critical distance （Re） of Eu2＋ in SrZnE（PO4）2 is calculated to be 3.244 nm. The Commission International de I＇Eclairage （CIE） chromaticity coordinates of SrZn2（PO4）E：EU2＋ locate at the blue region, such as （0.150, 0.072）： The results indicate that the SrZn2（PO4）2：Eu2＋ phosphor may have potential applications in white light emitting diodes （LEDs）.

关 键 词：白光LED 蓝色发光 发光特性 偶极-偶极相互作用 白色发光二极管 高温固相法 发光性能 猝灭效应 

分 类 号：TN312.8[电子电信—物理电子学] TN383.1