为了探索Eu3在晶格位置中占据不同对称中心时的发光性质,采用高温固相法制备了BaM2ZnO5∶Eu3+ (M =La,Gd)系列红色荧光粉,分别用X射线衍射(XRD)、扫描电镜(SEM)、荧光光谱(PL)对其晶体结构、形貌和发光性质进行了表征.结果表明,经1000℃烧结后可得到BaM2ZnO5(M =La,Gd)纯相,荧光粉的颗粒大小分布较均匀,粒径大约为3 μm～5 μm;BaM2ZnO(Eu3+(M=La,Gd)荧光粉可以被395 nm的近紫外光有效激发,Ba-La2 ZnO5∶Eu3在595 nm处的发射峰为最强峰,对应于Eu3的5D0→7F1 (595 nm)磁偶极跃迁.BaGd2ZnO5∶Eu3+在627 nm处的发射峰为最强峰,对应于Eu3+的5D0→7 F2 (615 nm,627 nm)电偶极跃迁.
参考文献
| [1] | Akita K;Nakamura T;Hirayama H .Effects of GaN substrates on InAlGaN quaternary UV LEDs[J].Physica Status Solidi, A. Applied Research,2004(12):2624-2627. |
| [2] | M. George Craford .Visible Light-Emitting Diodes: Past, Present, and Very Bright Future[J].MRS bulletin,2000(10):27-31. |
| [3] | de Bettencourt-Dias A .Lanthanide-based emitting materials in light-emitting diodes[J].Dalton transactions: An international journal of inorganic chemistry,2007(22):2229-2241. |
| [4] | Hemmila I;Laitala V .Progress in lanthanides as luminescent probes[J].Journal of Fluorescence,2005(4):529-542. |
| [5] | Henning A. Hoppe .Recent Developments in the Field of Inorganic Phosphors[J].Angewandte Chemie,2009(20):3572-3582. |
| [6] | Huang, C.-H.;Chen, T.-M.;Cheng, B.-M. .Luminescence investigation on ultraviolet-emitting rare-earth-doped phosphors using synchrotron radiation[J].Inorganic Chemistry: A Research Journal that Includes Bioinorganic, Catalytic, Organometallic, Solid-State, and Synthetic Chemistry and Reaction Dynamics,2011(14):6552-6556. |
| [7] | A. J. Fischer;A. A. Allerman;M. H. Crawford;K. H. A. Bogart;S. R. Lee;R. J. Kaplar;W. W. Chow;S. R. Kurtz;K. W. Fullmer;J. J. Figiel .Room-temperature direct current operation of 290 nm light-emitting diodes with milliwatt power levels[J].Applied physics letters,2004(17):3394-3396. |
| [8] | LUO XiXian,CAO WangHe,SUN Fei.The development of silicate matrix phosphors with broad excitation band for phosphor-convered white LED[J].科学通报（英文版）,2008(19):2923-2930. |
| [9] | 张瑞西,王涛,井艳军,朱月华,王海波.Eu3+激活的红色荧光粉的研究进展[J].材料导报,2008(Z2):286-289. |
| [10] | 谢安,袁曦明.白光LED用稀土红色荧光粉的研究进展[J].化工新型材料,2008(12):14-16,29. |
| [11] | Shi, L.;Seo, H.J. .Investigation of crystallographic sites of Eu~3 in La _2BaZnO_5 by site-selective laser-excitation spectroscopy[J].Journal of Luminescence: An Interdisciplinary Journal of Research on Excited State Processes in Condensed Matter,2011(3):523-525. |
| [12] | Chongfeng Guo;Xu Ding;Yan Xu .Luminescent Properties of Eu~(3+)-Doped BaLn_2ZnO_5 (Ln = La, Gd, and Y) Phosphors by the Sol–Gel Method[J].Journal of the American Ceramic Society,2010(6):1708-1713. |
| [13] | 李晶晶,王喜贵,张岚,王艳鑫,付道彬.BaO-TiO2-3SiO2∶Eu3+发光材料的结构与发光性质的研究[J].稀土,2013(03):20-25. |
| [14] | James A. Dormary;Ju H. Choi;Gregory Kuzmanich .High-Quality White Light Using Core-Shell RE~(3+):LaPO4 (RE = Eu, Tb, Dy, Ce) Phosphors[J].The journal of physical chemistry, C. Nanomaterials and interfaces,2012(23):12854-12860. |
| [15] | Yonghong Hu;XiaoChen;WengeYang;ZiyuLei;CongZhao .SynthesisandluminescencepropertiesofYVO4:Eu3+,Bi3+ phosphor with enhancedphotoluminescencebyBi3+ doping[J].The journal of physics and chemistry of solids,2010(3):175-180. |
| [16] | 张丽霞,梁利芳,黄天梅,易敏,庞起.Gd2-xEuxWO6红色荧光粉的溶胶-凝胶合成及其荧光性能分析[J].稀土,2012(02):40-44. |
| [17] | H. Lai;B. Chen;W. Xu .Photoluminescence characteristics of (Y,Gd)P_(0.5)V_(0.5)O_4:Tm~(3+) phosphor particles prepared by coprecipitation reaction[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2005(1/2):181-184. |
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