Photoluminescence Spectra of Eu^<2+> Centers in Ca(S, Se):Eu and Sr(S, Se):Eu
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概要
- 論文の詳細を見る
Photoluminescence and excitation spectra are observed for Ca(S, Se):Eu^<2+> and Sr(S, Se):Eu^<2+> powder phosphors at various temperatures between 4.2 and 300 K. The emission band of Ca(S_<1-x>Se_x):Eu^<2+>, at 300 K shifts almost linearly with an increase in x, from 652 nm (r=0) to 597 nm (x=1). In Sr(S_<1-x>Se_x):Eu^<2+>, the emission band shifts also linearly from 620 nm (x=0) to 571 nm (x=1). At low temperatures, vibronic structures on emission bands are observed for CaS:Eu^<2+>, CaSe:Eu^<2+>, SrS:Eu^<2+> and SrSe:Eu^<2+>. The excitation processes are attributed to two transitions; the intraionic 4f^7→4f^65d transition within Eu^<2+> and the fundamental absorption by host crystal, followed by the transfer of the excitation energy to an unexcited Eu^<2+> ion.
- 社団法人応用物理学会の論文
- 1995-10-15
著者
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Nakamura Kaizo
Department Of Physics Faci4ty Of Science Kyoto University
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Harada O
Hyogo Prefectural Inst. Industrial Res. Himeji
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Harada Osamu
Department Of Product Innovation Hyogo Prefectural Institute Of Technology
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Yamashita Nobuhiko
Department Of Physics Faculty Of Education Okayama University
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Yamashita Nobuhiko
Department Of Physics Faculty Of Science Okayama University:(present Address)department Of Physics F
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Harada Osamu
Department Of Clinical Laboratory Kanto Central Hospital
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