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

doi:10.1088/1674-1056/21/12/124102

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.

Keywords: BaMgAl₁₀O₁₇:Eu²⁺ phosphor luminescence irradiation degradation

Received: 07 February 2012
Revised: 06 June 2012
Accepted manuscript online:

PACS:	41.60.-m	(Radiation by moving charges)
	42.40.My	(Applications)

Fund: 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).

Corresponding Authors: Zhang Jia-Chi
E-mail: zhangjch@lzu.edu.cn

Cite this article:

Zhang Jia-Chi (张加驰), Zhou Mei-Jiao (周美娇), Wang Yu-Hua (王育华) Photoluminescence degradation mechanism of BaMgAl₁₀O₁₇:Eu²⁺ phosphor by vacuum ultraviolet irradiation 2012 Chin. Phys. B 21 124102

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

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