Energy Transfer from Eu^<2+> to Mn^<2+> in MgS:Eu^<2+>, Mn^<2+>
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概要
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Photoluminescence and excitation spectra are observed for MgS:EuF_3 (0.01 mol%) and MgS:EuF_3 (0-0.05 mol%),MnF_2 (1 mol%) powder phosphors at 10, 80 and 300 K. At 300 K, the emission spectra of the doubly activated phosphors of MgS:Eu^<2+>, Mn^<2+> consist of three bands at 592nm (attributed to Eu^<2+>), 700nm (attributed to Mn^<2+>) and 820 nm. Their shapes depend on the Eu^<2+> concentration and the excitation wavelength. We can see direct evidence of the energy transfer from Eu^<2+> to Mn^<2+> in the emission and excitation spectra of MgS:Eu^<2+>, Mn^<2+>. The new emission band observed at 820nm is attributed to the center associated with both Eu^<2+> and Mn^<2+> , e.g. the paired-ion center of the Eu^<2+> and Mn^<2+> ions.
- 社団法人応用物理学会の論文
- 1997-09-15
著者
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Yamashita Nobuhiko
Department Of Physics Faculty Of Education Okayama University
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Takagoshi Atsumi
Department Of Physics Faculty Of Education Okayama University
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