Li+ 掺杂Sr2MgSi2O7∶Eu2+,Dy3+ 长余辉材料的发光性能

肖玲; 周建; 刘桂珍

doi:doi:10.3788/fgxb20173809.1143

发光学报, 2017, 38 (9): 1143, 网络出版: 2017-10-17

Li+ 掺杂Sr₂MgSi₂O₇∶Eu²⁺,Dy³⁺ 长余辉材料的发光性能

Luminescent Properties of Li+ doped Sr₂MgSi₂O₇∶Eu²⁺,Dy³⁺ Phosphors

论文大纲

肖玲周建刘桂珍

作者单位

武汉理工大学材料复合新技术国家重点实验室, 湖北武汉 430070

Li+ 离子发光性能 Sr2MgSi2O7∶Eu2+ Sr2MgSi2O7∶Eu2+ Dy3+ Dy3+ lithium ion luminescent properties

摘要

采用高温固相法制备Li+掺杂Sr2MgSi2O7∶Eu2+,Dy3+ 长余辉材料, 对样品进行X射线衍射、扫描电镜、激发光谱、发射光谱、余辉衰减曲线和热释光曲线表征, 研究了Li+ 掺杂对Sr2MgSi2O7∶Eu2+,Dy3+ 发光性能的影响。实验结果表明: Li+ 掺杂对样品激发光谱和发射光谱的峰形、峰位基本没有影响, 但是能改善样品的余辉性能。与未掺杂Li+的样品比较, Li+ 掺杂摩尔分数为2.5%样品的初始发光强度提高了1.5 倍, 余辉衰减常数提高了1.6 倍。通过热释光曲线表征分析陷阱数量并计算了陷阱深度, 分析表明, 掺杂Li+ 能增加基质中氧空位的数量, 适量增加陷阱深度, 从而提高材料的发光性能。

Abstract

Sr2MgSi2O7∶Eu2+,Dy3+and Sr2MgSi2O7∶Eu2+,Dy3+,Li+ phosphors were prepared by conventional solid state reaction method, and the influence of Li+ doping on the luminescent properties of Sr2MgSi2O7∶Eu2+,Dy3+ phosphors was studied. The samples were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), photoluminescence (PL), decay curves, and thermoluminescence (TL). The results indicate that the incorporation of Li+ions has no influence on the position of the emission peak which is determined by 4f7→4f65d1 of Eu2+, while it has relationships with the intensity of the emission and the afterglow. The highest phosphorescent intensity was observed with 2.5% of Li+, and compared with the undoped sample, the phosphorescent intensity and the decay constant were increased by 1.5 and 1.6 times, respectively. By the characteristic of TL measurement, the number and the depth of trap level were analyzed. The doping of Li+ can increase the number of oxygen vacancies and increase the trap depth, so as to improve the afterglow properties of phosphor.

参考文献

[1] 肖志国, 罗昔贤. 蓄光型发光材料及其制品［M］. 2版. 北京:化学工业出版社, 2005.

XIAO Z G, LUO X X. The Luminescent Materials and Products ［M］. 2nd ed. Beijing: Chemical Industry Press, 2005. (in Chinese)

[2] HAI O, JIANG H Y, XU D, et al.. The effect of grain surface on the long afterglow properties of Sr2MgSi2O7∶Eu2+,Dy3+ ［J］. Mater. Res. Bull., 2016, 76:358-364.

[3] SAHU I P, BISEN D P, BRAHME N, et al.. Luminescence properties of Eu2+,Dy3+-doped Sr2MgSi2O7, and Ca2MgSi2O7 phosphors by solid-state reaction method ［J］. Res. Chem. Intermed., 2015, 41(9):1-16.

[4] HAI O, JIANG H Y, XU D, et al.. Interaction of rare earth ions in Sr2MgSi2O7∶Eu2+,Dy3+ material ［J］. J. Wuhan Univ. Technol. Mater, 2016, 31(2):269-273.

[5] SAHU I P, BISEN D P, BRAHME N, et al.. Enhanced luminescence performance of Sr2MgSi2O7∶Eu2+ blue long persistence phosphor by co-doping with Ce3+ ions ［J］. J. Mater. Sci.: Mater. Electron., 2016, 27(1):554-569.

[6] WU H Y, HU Y H, CHEN L, et al.. Enhancement on the afterglow properties of Sr2MgSi2O7∶Eu2+ by Er3+codoping ［J］. Mater. Lett., 2011, 65(17-18):2676-2679.

[7] LI B H, YANG J, WANG J, et al.. Two-color emitting of Eu2+ and Tb3+ co-doped Sr2MgSi2O7 for UV LEDs ［J］. Opt. Mater., 2014, 36(10):1649-1654.

[8] HASSINEN J, HOLS J, LAAMANEN T, et al.. Electronic structure of defects in Sr2MgSi2O7∶Eu2+, La3+ persistent luminescence material ［J］. J. Non-Cryst. Solids, 2010, 356(37-40):2015-2019.

[9] WANG X M, LI F F, ZUO G F, et al.. Enhanced afterglow properties of Nd3+ co-doped Sr2MgSi2O7∶Eu2+,Dy3+ synthesized by sol-gel method ［J］. Ceram. Int., 2016, 42(16):19441-19444.

[10] LI Y Q, WANG Y H. Enhancement of long-persistence by Ce3+ co-doping in Sr2MgSi2O7∶Eu2+,Dy3+ blue phosphor ［J］. J. Phys.: Conf. Ser., 2009, 152(1):012090-1-6.

[11] SAHU I P, BISEN D P, BRAHME N, et al.. Luminescent properties of R+ doped Sr2MgSi2O7∶Eu3+ (R+ = Li+, Na+ and K+) orange-red emitting phosphors ［J］. J. Mater. Sci.: Mater. Electron., 2016, 27(7):6721-6734.

[12] 万英, 何久洋, 马媛媛, 等. 蓝色长余辉材料CaAl2O4∶Eu2+, Li+的发光性质［J］. 发光学报, 2016, 37(2):181-186.

WAN Y, HE J Y, MA Y Y, et al.. Luminescent properties of blue emitting long afterglow phosphors CaAl2O4∶Eu2+, Li+ ［J］. Chin. J. Lumin., 2016, 37(2):181-186. (in Chinese)

[13] LIU Z W, LIU Y L, ZHANG J X, et al.. Long afterglow in Pr3+ and Li+ co-doped CaZrO3 ［J］. Opt. Commun., 2015, 251(4-6):388-392.

[14] ATABAEV T S, VU H H T, KIM M, et al.. Effects of Li+ codoping on the optical properties of SrAl2O4 long afterglow ceramic phosphors ［J］. Adv. Opt., 2014, 2014:459065-1-4.

[15] 李斌, 孟小康, 冯珊, 等. 助熔剂对Sr0.97Si2N2O2∶0.03Eu2+荧光粉制备及发光性能的影响［J］. 发光学报, 2014, 35(4):425-430.

LI B, MENG X K, FENG S, et al.. Effects of fluxes on preparation and luminescent properties of Sr0.97Si2N2O2∶0.03Eu2+ phosphor ［J］. Chin. J. Lumin., 2014, 35(4):425-430. (in Chinese)

[16] BALAKRISHNAIAH R, YI S S, JANG K, et al.. Enhanced luminescence properties of YBO3∶Eu3+ phosphors by Li-doping ［J］. Mater. Res. Bull., 2011, 46(4):621-626.

[17] 李雪静, 梁玉军, 杨帆, 等. 助熔剂对绿色荧光粉Ba2SiO4∶Eu2+颗粒形貌及发光性能的影响［J］. 发光学报, 2012, 33(8):817-823.

LI X J, LIANG Y J, YANG F, et al.. Effect of fluxes on morphology and luminescent properties of Ba2SiO4∶Eu2+ green phosphor ［J］. Chin. J. Lumin., 2012, 33(8):817-823. (in Chinese)

[18] ZHANG Q H, RONG M Z, TAN H Y, et al.. Luminescent properties of the white long afterglow phosphors: Sr3Al2O5Cl2∶　Eu2+,Dy3+ ［J］. J. Mater. Sci. Mater. Electron., 2016, 27(12):13093-13098.

[19] COOKE D W, BENNETT B L, FARNUM E H, et al.. Thermally stimulated luminescence from x-irradiated porous silicon ［J］. Appl. Phys. Lett., 1997, 70(26):3594-3596.

[20] MATSUZAWA T, AOKI Y, TAKEUCHI N, et al.. A new long phosphorescent phosphor with high brightness, SrAl2O4∶Eu2+,Dy3+ ［J］. J. Electrochem. Soc., 1996, 143(8):2670-2673.

[21] WAN M H, WANG Y H, WANG X S, et al.. Long afterglow properties of Eu2+/Mn2+ doped Zn2GeO4 ［J］. J. Lumin., 2014, 145:914-918.

[22] WAN M H, WANG Y H, WANG X S, et al.. The properties of a novel green long afterglow phosphor Zn2GeO4∶Mn2+0.01, Pr3+0.01 ［J］. Adv. Mater. Res., 2014, 936(3):552-561.

[23] DU Q Q, ZHOU G J, ZHOU J, et al.. Enhanced luminescence of novel Y2Zr2O7∶Dy3+ phosphors by Li+ co-doping ［J］. J. Alloys Compd., 2013, 552:152-156.

[24] YU C C, LIU X M, YU M, et al.. Enhanced photoluminescence of Ba2GdNbO6∶Eu3+/Dy3+ phosphors by Li+ doping ［J］. J. Solid State Chem., 2007, 180(11):3058-3065.

肖玲, 周建, 刘桂珍. Li+ 掺杂Sr₂MgSi₂O₇∶Eu²⁺,Dy³⁺ 长余辉材料的发光性能[J]. 发光学报, 2017, 38(9): 1143. Xiao Leng, Zhou Jian, Liu Gui-zheng. Luminescent Properties of Li+ doped Sr₂MgSi₂O₇∶Eu²⁺,Dy³⁺ Phosphors[J]. Chinese Journal of Luminescence, 2017, 38(9): 1143.

Li+ 掺杂Sr₂MgSi₂O₇∶Eu²⁺,Dy³⁺ 长余辉材料的发光性能

关于本站 Cookie 的使用提示

全站搜索