发光学报2011，Vol.32Issue(4)：332-336,5.DOI:10.3788/fgxb20113204.0332
新型红色荧光粉Na2Ca4(PO4)2SiO4:Eu3+,Bi3+的制备及发光特性
Synthesis and Luminescent Properties of Na2 Ca4 ( PO4 ) 2SiO4: Eu3 +, Bi3 + Red-emitting Phosphor
摘要
Abstract
Novel red-emit phosphors, Na2Ca4( 1 - x - y ( PO4 ) 2 SiO4: xEu3 +,yBi3 + were synthesized for WLED by conventional solid-state reaction at 1 200 ℃. Effects of the H3 BO3 flux, the re-calcination time and doping concentrations of Eu3 +, Bi3 + on the luminescence properties were investigated. It was found that a higher Eu3+emission intensity can be obtained if 30％ H3 BO3 was added as flux. No apparently structure transformation of the Na2Ca4( PO4)2SiO4 matrix was observed after doping Eu3+,Bi3+. The phosphors give the characteristic emission of Eu3+ at 615 nm under the excitation of 395 nm. Samples re-calcined at 1 200 ℃ for 1.5 h gives a strongest emission. The red emission of Eu3 + can be significantly enhanced by co-doping of Bi3 + via an energy transfer process which involves the charge transfer (CT) transition of Eu3+ -O2- →Bi3＋ →Eu3+. The optimized doping mole fractions of Eu3＋ and Bi3+ are x =0.04 and y ＝0.01, respectively. It shows that the Na2Ca4-(PO4) 2 SiO4: Eu3 +, Bi3+ is a promising red phosphor for NUV-chips based WLED.关键词
Na2Ca4(PO4)2SiO4:Eu3+,Bi3+/高温固相法/白光LED/红粉Key words
Na2Ca4( PO4 ) 2 SiO4: Eu3 + , Bi3 +/ solid-state reaction method/ white-LED/ red-emit phosphor分类
数理科学引用本文复制引用
肖全兰,刘关喜,邹少瑜,彭文芳,杨创涛,张蕤,谢丽娟,孟建新..新型红色荧光粉Na2Ca4(PO4)2SiO4:Eu3+,Bi3+的制备及发光特性[J].发光学报,2011,32(4):332-336,5.基金项目
国家自然科学基金(30670523) （30670523）
中央高校基本科研业务费专项资金资助项目 （）
