Chin. Phys. B ›› 2012, Vol. 21 ›› Issue (12): 124102-124102.doi: 10.1088/1674-1056/21/12/124102

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Photoluminescence degradation mechanism of BaMgAl10O17:Eu2+ phosphor by vacuum ultraviolet irradiation

张加驰, 周美娇, 王育华   

  1. Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000, China
  • 收稿日期:2012-02-07 修回日期:2012-06-06 出版日期:2012-11-01 发布日期:2012-11-01
  • 基金资助:
    Project supported by the National Natural Science Young Foundation of China (Grant No. 10904057) and the Fundamental Research Funds for Central Universities, China (Grant No. Lzjbky-2011-125).

Photoluminescence degradation mechanism of BaMgAl10O17:Eu2+ phosphor by vacuum ultraviolet irradiation

Zhang Jia-Chi (张加驰), Zhou Mei-Jiao (周美娇), Wang Yu-Hua (王育华)   

  1. Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000, China
  • Received:2012-02-07 Revised:2012-06-06 Online:2012-11-01 Published:2012-11-01
  • Contact: Zhang Jia-Chi E-mail:zhangjch@lzu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Young Foundation of China (Grant No. 10904057) and the Fundamental Research Funds for Central Universities, China (Grant No. Lzjbky-2011-125).

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摘要： A real high power vacuum ultraviolet light source is applied to the investigation on the vacuum ultraviolet irradiation degradation of BaMgAl10O17:Eu2+ phosphor. The degradations of emission intensity and colour quality of sample are clearly observed after irradiation. It reveals that the oxidation of Eu2+ during irradiation is partly responsible for the degradations. The excitation and absorption spectra show that some traps generated during irradiation have negative influence on the luminescence of sample and these traps have been identified as positively charged oxygen vacancies by positron annihilation. The investigations on host emission and decay curve further confirm that these oxygen vacancies are involved in the perturbation of energy transfer from host to Eu2+ and finally result in the degradation.

关键词: BaMgAl10O17:Eu2+, phosphor, luminescence, irradiation degradation

Abstract: A real high power vacuum ultraviolet light source is applied to the investigation on the vacuum ultraviolet irradiation degradation of BaMgAl10O17:Eu2+ phosphor. The degradations of emission intensity and colour quality of sample are clearly observed after irradiation. It reveals that the oxidation of Eu2+ during irradiation is partly responsible for the degradations. The excitation and absorption spectra show that some traps generated during irradiation have negative influence on the luminescence of sample and these traps have been identified as positively charged oxygen vacancies by positron annihilation. The investigations on host emission and decay curve further confirm that these oxygen vacancies are involved in the perturbation of energy transfer from host to Eu2+ and finally result in the degradation.

Key words: BaMgAl10O17:Eu2+, phosphor, luminescence, irradiation degradation

中图分类号:  (Radiation by moving charges)

  • 41.60.-m
42.40.My (Applications)