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

• Ruelle Nathalie

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

• Pham-Thi Mai

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

• Fouassier Claude

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

抄録

Red and orange calcium sulfide phosphors (CaS:Eu and CaS:Mn) were prepared by the flux method. Eu²⁺ and Mn²⁺ 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 Y₂O₂S:Eu, respectively. Calcium sulfide codoped with Eu and Mn shows a strong increase of Eu²⁺ in addition to Mn²⁺ 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 Mn²⁺ in CaS:Mn, Eu show that the fast part depends on the Eu²⁺ content. On the other hand, the Eu²⁺ decay became slower in the presence of Mn²⁺. These observations support the resonant mechanism of the energy transfer from Mn²⁺ to Eu²⁺.

収録刊行物

• Japanese Journal of Applied Physics

  Japanese Journal of Applied Physics 31 (9), 2786-2790, 1992

  社団法人応用物理学会

キーワード

• luminescence
• cathodoluminescence
• CaS
• Eu<SUP>2+</SUP>
• Mn<SUP>2+</SUP>
• phosphor
• energy transfer

詳細情報

• CRID: 1570854177386700672
• NII論文ID: 110003900979
• NII書誌ID: AA10457675
• ISSN: 00214922
• Web Site: https://jlc.jst.go.jp/DN/JALC/00337572232?from=CiNii
• 本文言語コード: en
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