Luminescence and Energy Levels of Mn^<2+> in LnMB_5O_<10> (Ln=La, Gd and Y; M=Mg, Zn and Cd)

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概要

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• Luminescence of Bi^<3+> or/and Mn^<2+> in LnMB_5O_<10> system of phosphor has been studied. Bi^<3+> in LnMB_5O_<10> leads to two types of emissions, viz. emission due to (i) Bi^<3+> isolated centres and (ii) Bi^<3+> clusters. In LaMB_5O_<10>, Bi^<3+> emission can cover longer distances (25 Å) for resonant transfer. In LaMgB_5O_<10>, replacement of Mg by Cd or Zn leads to considerable enhancement in Mn^<2+> emission intensity. In the case of GdMB_5O_<10> system, this substitution leads to significant increase in the Gd^<3+>→Mn^<2+> energy transfer rate. Energy levels of Mn^<2+> in LaMB_5O_<10> and crystal field parameters (for the case of cubic field) have been calculated and the results based on these are discussed.

• 社団法人応用物理学会の論文
• 1990-10-20

著者

• Manoharan S.

  Central Electrochemical Research Institute

• Jagannathan R

  Central Electrochemical Research Inst. Karaikudi Ind

• Jagannathan R.

  Central Electrochemical Research Institute

• Kutty T

  Indian Inst. Sci. Bangalore Ind

• RAO R.

  Central Electrochemical Research Institute

• KUTTY T.

  Indian Institute of Science

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