物理化学学报 >> 2012, Vol. 28 >> Issue (03): 699-705.doi: 10.3866/PKU.WHXB201201121

光化学和辐射化学 上一篇    下一篇

紫外激发Sr1-x-yMgP2O7:xCe3+,yTb3+荧光粉的发光特性及能量传递

豆喜华1, 赵韦人1, 宋恩海1, 闵华初2   

  1. 1. 广东工业大学物理与光电工程学院, 广州 510006;
    2. 东莞欣光源电子有限公司, 广东东莞 523500
  • 收稿日期:2011-09-08 修回日期:2011-12-21 发布日期:2012-02-23
  • 通讯作者: 赵韦人 E-mail:zwren123@126.com
  • 基金资助:

    广东省教育部产学研结合项目(2010B090400021)资助

Optical Properties and Energy Transfer of Sr1-x-yMgP2O7:xCe3+,yTb3+ Phosphor under Ultraviolet Excitation

DOU Xi-Hua1, ZHAO Wei-Ren1, SONG En-Hai1, MIN Hua-Chu2   

  1. 1. School of Physics & Optoelectronic Engineering, Guangdong University of Technology, Guangzhou 510006, P. R. China;
    2. Dongguan Xinguangyuan Electronics Co. Ltd., Dongguan 523500, Guangdong Province, P. R. China
  • Received:2011-09-08 Revised:2011-12-21 Published:2012-02-23
  • Contact: ZHAO Wei-Ren E-mail:zwren123@126.com
  • Supported by:

    The project was supported by the Cooperation Project in Industry, Education and Research of Guangdong Province and Ministry of Education of China (2010B090400021).

摘要: 采用高温固相法合成了Sr1-x-yMgP2O7:xCe3+,yTb3+荧光粉. 研究了荧光粉的晶体结构、发光特性、荧光寿命、能量传递机理和荧光粉的热稳定性. 研究结果表明: 在SrMgP2O7基质中, Ce3+的发射峰值为398 nm, Tb3+的主发射峰值为545 nm, 它们分别属于5d-4f 跃迁和5D47F5跃迁. Ce3+和Tb3+共掺时, Ce3+和Tb3+通过电偶极子-电偶极子相互作用发生能量传递, 能量传递的临界距离为0.614 nm. 通过计算得到单掺杂Ce3+、Tb3+时热猝灭过程的激活能分别为0.122和0.111 eV, Tb3+离子的发光热稳定性比Ce3+离子的好.

关键词: 发光特性, 荧光寿命, 能量传递, 热稳定性

Abstract: Sr1-x-yMgP2O7:xCe3+,yTb3+ phosphors were successfully synthesized by a solid-state reaction method. The crystal structure, optical properties, luminescence decay, energy transfer, and thermal stability properties were investigated. The results showed that the emission peaks of the co-doped Ce3+ and Tb3+ ions in the SrMgP2O7 host were located at 398 and 545 nm, respectively. The peaks were attributed to 5d-4f and 5D47F5 transitions, respectively. An efficient energy transfer from the Ce3+ to Tb3+ ions by means of dipole-dipole interactions was observed and the critical distance of the energy transfer was 0.614 nm. The thermal activation energies of 0.122 and 0.111 eV for SrMgP2O7:Ce3+ and SrMgP2O7:Tb3+, respectively, were obtained from the temperature dependent (313-453 K) luminescence intensities. The Tb3+ ion was found to be superior to Ce3+ ion in the thermal stability of light-emitting diodes.

Key words: Optical property, Luminescence decay, Energy transfer, Thermal stability

MSC2000: 

  • O644