Valence states and luminescence of europium in BaFBr:Eu crystals

Eu 2+ and Eu 3+ contents in BaFBr:Eu phosphor were determined by ESR and photoluminescence. In addition to the transitions of Eu 2+ 4f←4f5d and Eu 3+ 4f←f 24, the excitation and emission of Eu 3+ CTS were found. The enhancement of X-ray luminescence of Eu 2+ by the coexisting Eu 3+ ions is explained...

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Bibliographic Details
Published in:Journal of luminescence 1988-02, Vol.40, p.171-172
Main Authors: Sun, Xiao-Ping, Su, Mian-Zeng
Format: Article
Language:English
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Summary:Eu 2+ and Eu 3+ contents in BaFBr:Eu phosphor were determined by ESR and photoluminescence. In addition to the transitions of Eu 2+ 4f←4f5d and Eu 3+ 4f←f 24, the excitation and emission of Eu 3+ CTS were found. The enhancement of X-ray luminescence of Eu 2+ by the coexisting Eu 3+ ions is explained as; Eu 3+ CTS→ Eu 3+ CTS *→ Eu 2+* + hv Eu2+ and Eu 2+ + h +2←Eu 3+.
ISSN:0022-2313
1872-7883
DOI:10.1016/0022-2313(88)90142-1