采用高温固相法合成了Sr2Al2SiO7∶Re（Re=Eu2＋,Ce3＋）荧光粉,研究了Eu2＋和Ce3＋在该基质中的发光特性,以及Eu2＋、Ce3＋共掺时的能量传递现象。研究表明Sr2Al2SiO7∶Eu2＋激发光谱呈宽带激发,最大发射峰位于513nm,Eu2＋最佳掺杂浓度为5%（摩尔分数）。Sr2Al2SiO7∶Ce3＋有两个激发峰,分别位于300和337nm,发射峰位于406nm,当Ce3＋浓度达到2%（摩尔分数）时发射强度最大。Eu2＋和Ce3＋在该体系共掺时存在Ce3＋到Eu2＋的有效能量传递,有利于提高体系的发光效率。
The phosphors of Sr2Al2SiO7∶Re（Re=Eu2＋,Ce3＋） were synthesized by high temperature solid state reaction.The luminescence properties of Eu2＋,Ce3＋ and the energy transfer between them were studied.The results indicate that Sr2Al2SiO7∶Eu2＋ phosphors show a broad excitation band and the main emission peak of the sample is located at 513nm.The emission intensity reaches the maximum value when the concentration of Eu2＋ is 5mol%.The excitation spectrum is composed of two peaks which locate at 300 and 337nm,respectively.The strongest emission peak locates at 406nm and the strongest emission intensity is obtained when the concentration of Ce3＋ is 2mol%.Besides,co-doping of Ce3＋ and Eu2＋ enhances the emission intensity by transferring Ce3＋ emission energy to Eu2＋,which contributes to photoluminescence performance.
参考文献
| [1] | Wang YH;Li F .Synthesis of BaAl12O19 : Mn2+ nanophosphors by a reverse microemulsion method and its photoluminescence properties under VUV excitation[J].Journal of Luminescence: An Interdisciplinary Journal of Research on Excited State Processes in Condensed Matter,2007(0):866-868. |
| [2] | 李旭,关丽,杨志平,张玮,闻建伟.蓝色荧光粉Sr_2Al_2SiO_7：Ce~（3+）的制备与发光性能[J].硅酸盐学报,2009(11):1919-1923. |
| [3] | Pan W;Ning GL;Zhang X;Wang J;Lin Y;Ye JW .Enhanced luminescent properties of long-persistent Sr2MgSi2O7:Eu2+, Dy3+ phosphor prepared by the co-precipitation method[J].Journal of Luminescence: An Interdisciplinary Journal of Research on Excited State Processes in Condensed Matter,2008(12):1975-1979. |
| [4] | Ding YL;Zhang YX;Wang ZY;Li W;Mao DL;Han HB;Chang CK .Photoluminescence of Eu single doped and Eu/Dy codoped Sr2Al2SiO7 phosphors with long persistence[J].Journal of Luminescence: An Interdisciplinary Journal of Research on Excited State Processes in Condensed Matter,2009(3):294-299. |
| [5] | 蒙延双,朱福良,王达健.Ba2+离子对Sr2Al2SiO7：Eu2+荧光体微结构及发光性能的影响[J].功能材料,2008(07):1078-1080. |
| [6] | Zhang Q;Wang J;Zhang M;Su Q .Tunable bluish green to yellowish green Ca2(1-x)Sr2xAl2SiO7 : Eu2+ phosphors for potential LED application[J].Applied physics, B. Lasers and optics,2008(2):195-198. |
| [7] | 邱勇,孙海涛.一种Eu2+激活的铝酸锶长余辉结构[J].功能材料,2000(06):632. |
| [8] | Dorenbos P .Energy of the Eu2+ 5d state relative to the conduction band in compounds[J].Journal of Luminescence: An Interdisciplinary Journal of Research on Excited State Processes in Condensed Matter,2008(4):578-582. |
| [9] | 刘春棠,何大伟,李少霞,刘端阳,鲁成祝.稀土离子Ce, Tb掺杂硼磷酸锶荧光粉的发光性质[J].光谱学与光谱分析,2005(08):1203-1206. |
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