PDF下载

[1]李红娜,田莲花*.Li6(La2Ca)Nb2O12基质中掺杂Dy3+离子的发光性质研究[J].延边大学学报(自然科学版),2019,45(01):36-39.
　LI Hongna,TIAN Lianhua*.Luminescence properties of Dy3+ ion doped Li6(La2Ca)Nb2O12 phosphor[J].Journal of Yanbian University,2019,45(01):36-39.

点击复制

Li6(La2Ca)Nb2O12基质中掺杂Dy3+离子的发光性质研究

《延边大学学报(自然科学版)》[ISSN:1004-4353/CN:22-1191/N] 卷: 第45卷期数: 2019年01期页码: 36-39 栏目: 基础科学研究出版日期: 2019-02-20

Title:: Luminescence properties of Dy³⁺ ion doped Li₆(La₂Ca)Nb₂O₁₂ phosphor

文章编号:: 1004-4353(2019)01-0036-04

作者:: 李红娜; 田莲花^*; ( 延边大学理学院, 吉林延吉 133002 )

Author(s):: LI Hongna; TIAN Lianhua^*; ( College of Science, Yanbian University, Yanji 133002, China )

关键词:: 黄色荧光粉; Dy³⁺; 发光

Keywords:: yellow phosphor; Dy³⁺; luminescence

分类号:: O482.31

文献标志码:: A

摘要:: 采用高温固相法制备了Li₆(La₂Ca)Nb₂O₁₂:Dy³⁺荧光粉样品,通过X射线衍射分析了样品的晶体结构,并利用光谱技术研究了样品的光致荧光光谱.光谱分析结果表明,Li₆(La₂Ca)Nb₂O₁₂:Dy³⁺的激发光谱由两部分组成:一是位于200～290 nm的一个宽带,峰值位于269 nm,属于Nb—O、Dy—O的电荷迁移带的叠加; 二是位于310～500 nm之间的系列尖锐的吸收峰,这些激发峰属于Dy³⁺的f →f跃迁.样品可被近紫外或蓝光LED有效激发.在269 nm激发下,样品在580 nm处有很强的黄光发射,色坐标为(0.470 3,0.492 7).随着Dy³⁺掺杂浓度的增加,样品的发光强度增强,当Dy³⁺浓度为10 mol%时出现浓度猝灭.

Abstract:: A novel phosphor Li₆(La₂Ca)Nb₂O₁₂:Dy³⁺ was successfully prepared by high temperature solid phase method. The XRD patterns and photoluminescence spectra of the samples were studied by X-ray diffractometer and fluorescence spectrophotometer. Spectral analysis results show that the excitation spectrum of Li₆(La₂Ca)Nb₂O₁₂:Dy³⁺ exhibits two parts: one is a broad absorbtion band at 200-290 nm centered at 269 nm, which is assigned the charge transfer band(CTB)of Nb—O and Dy—O; the second is a series of sharp absorption peaks between 310 nm and 500 nm. These excitation peaks belong to the f →f transition of Dy³⁺ ion, which could be excited with the nUV or blue LEDs. Under the excitation of 269 nm, the color coordinates of the emission spectrum are(0.470 3,0.492 7), which is located in the yellow region at 580 nm. The luminescence intensities of the samples increased with the increase of content of Dy³⁺ till x=10 mol%. When the concentration of Dy³⁺ is over 10 mol%, the luminescence intensities decreased due to the concentration quenching mechanism.

参考文献/References:

[1] IM W B, KIM Y I, FELLOWS N N, et al. A yellow-emitting Ce³⁺ phosphor, La_1-xCe_xSr₂AlO₅,for white light-emitting diodes[J]. Appl Phys Lett, 2008,93(9):1687.
[2] LI X, GUAN L, SUN M, et al. Luminescent properties of Dy³⁺ doped SrMoO₄ phosphor[J]. J Lumin, 2011,131(5):1022-1025.
[3] BLASSE G, BRIL A. A new phosphor for flying-spot cathode-ray tubes for color television: yellow-emitting Y₃Al₅O₁₂:Ce³⁺[J]. Appl Phys Lett, 1967,11(2):53-55.
[4] XIA Z G, SUN J F, DU H Y, et al. Luminescence properties of double-perovskite Sr₂Ca_1-2xEu_xNa_xMoO₆ red-emitting phosphors prepared by the citric acid-assisted solgel method[J]. J Mater Sci, 2010,45:1553-1559.
[5] YE S, WANG C H, LIU Z S, et al.Photoluminescence and energy transfer of phosphor series Ba_2-z Sr_zCaMo_1-yW_yO₆: Eu³⁺,Li⁺ for white light UVLED applications[J]. Appl Phys B -Lasers Opt, 2008,91:551-557.
[6] CASTELLANOS M, MARTINEZ M C, WEST A R. New family of phases, Li₂MXO₄:X=Zr,Hf; M=Mg,Mn,Fe,Co,Ni,Cu,Zn with α -LiFeO₂ and related structures[J]. Z Krist, 1990,190:161-169.
[7] BLASSE G. Structure and Bonding 42[M]. Berlin: Springer -Verlag Press, 1980:25.
[8] XIAO X Z, YAN B. Synthesis and luminescent properties of novel RENbO₄:Ln³⁺(RE=Y,Gd,Lu; Ln=Eu,Tb)[J]. J Non-cryst Solids, 2005,351(46/48):3634-3639.
[9] 姜永章,夏海平,张加忠,等.单晶体α -NaYF₄:Dy³⁺的制备及光谱特性[J].光子学报, 2015,44(8):0816001.
[10] SU Q, PEI Z W, CHI L S, et al. The yellow-to-blue intensity(Y/B)of Dy³⁺ emission[J]. J Alloys Compd, 1993,192(1/2):25-27.
[11] SU Q, LIN J, LI B. A study on the luminescence properties of Eu³⁺ and Dy³⁺ in M₂RE₈(SiO₄)₆O₂(M=Mg,Ca; RE=Y,Gd,La)[J]. J Alloys Compd, 1995,225(1/2):120-123.
[12] SOMMERDIJK J L, BRIL A. Efficiency of Dy³⁺-activated phosphors[J]. Chem Inform, 1975,6(39):1024-1030.
[13] HAN G C, WANG Y H, WU C F, et al. A novel Dy³⁺-doped GdPO₄ white-light phosphors under vacuum ultraviolet excitation for Hg-free lamps application[J]. Chin Phys Soc, 2009,18(10):4532-4535.
[14] 裴治武,苏锵.Dy³⁺,Sm³⁺和Ce³⁺离子在M₃La₂(BO₃)₄(M=Ca,Sr,Ba)中光谱性质的研究[J].发光学报,1989,10(3):213-218.
[15] PERCIVAL J, APPERLEY D, SLATER P R. Synthesis and structural characterisation of the Li ion conducting garnet-related systems, Li₆ALa₂Nb₂O₁₂(A=Ca,Sr)[J]. Solid State Ionics, 2008,179:1693-1696.
[16] VENKATARAMAN T, WERNER W. Li₆ALa₂Nb₂O₁₂(A=Ca,Sr,Ba): a new class of fast lithium ion conductors with garnet-like structure[J]. J Am Ceram Soc, 2005,88(2):411-418.

备注/Memo

收稿日期: 2018-12-26
*通信作者: 田莲花(1972—),女,博士,教授,研究方向为发光学.
基金项目: 国家自然科学基金资助项目(51362028); 吉林省科技发展计划项目(20130101035JC); 吉林省教育厅“十三五”科学技术项目(JJKH20180893KJ)

更新日期/Last Update: 2019-05-20