Cathodoluminescent Properties and Energy Transfer in Red Calcium Sulfide Phosphors (CaS:Eu, Mn)

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概要

• 論文の詳細を見る

• Red and orange calcium sulfide phosphors (CaS:Eu and CaS:Mn) were prepared by the flux method. Eu^<2+> and Mn^<2+> show strong concentration quenching at 0.1 and 0.8% respectively. Use of the potassium polysulfide flux leads to efficient phosphors; their efficiency reaches 60 and 100% of Y_2O_2S:Eu, respectively. Calcium sulfide codoped with Eu and Mn shows a strong increase of Eu^<2+> in addition to Mn^<2+> emission.The colour obtained varies between red and orange depending on the concentration rates of Mn and Eu. A luminous efficiency of about 86% was reached for CaS:Eu(0.08%), Mn(0.3%). The decay characteristics of Mn^<2+> in CaS:Mn, Eu show that the fast part depends on the Eu^<2+> content. On the other hand, the Eu^<2+> decay became slower in the presence of Mn^<2+>. These observations support the resonant mechanism of the energy transfer from Mn^<2+> to Eu^<2+>.

• 社団法人応用物理学会の論文
• 1992-09-15

著者

• Pham‐thi M

  Thomson‐csf Orsay Fra

• Pham-thi Mai

  Thomson-csf Laboratoire Central De Recherches Domaine De Corbeville

• RUELLE Nathalie

  Thomson-CSF, Laboratoire Central de Recherches, Domaine de Corbeville

• FOUASSIER Claude

  Laboratoire de Chimie du Solide du C.N.R.S., Universite de Bordeaux I

• Ruelle N

  Thomson‐csf Orsay Fra

• Ruelle Nathalie

  Thomson-csf Laboratoire Central De Recherches Domaine De Corbeville

• Fouassier Claude

  Laboratoire De Chimie Du Solide Du C.n.r.s. Universite De Bordeaux I

関連論文

• Valence State of Europium in CaS Prepared Using Alkaline Polysulfide Flux
• Electron Spin Resonance and Mossbauer Studies of CaS:Eu Synthesized Using the Flux Method
• Cathodoluminescent Properties and Energy Transfer in Red Calcium Sulfide Phosphors (CaS:Eu, Mn)

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