Acta Phys. -Chim. Sin. ›› 2012, Vol. 28 ›› Issue (03): 699-705.doi: 10.3866/PKU.WHXB201201121

• PHOTOCHEMISTRY AND RADIATION CHEMISTRY • Previous Articles     Next Articles

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
  • 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).

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


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