Photoluminescence of Eu^<2+> and Eu^<3+> Centers in CaS:Eu,Na Phosphors

概要

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Photoluminescence and excitation spectra, luminescence decay curves, and time-resolved photoluminescence spectra are observed for CaS:Eu,Na powder phosphors at various temperatures between 10 and 297 K. The detailed spectra of the Eu^<3+> center in CaS are observed for the first time. The emission lines due to the Eu^<3+> center are classified into two groups originating from centers A and B. The A center is attributed to the isolated Eu^<3+> center, whereas the B center, to the paired Eu<3+>-Eu^<2+> center.
社団法人応用物理学会の論文
1993-07-15