Mn2+ EPR characterization of thin film electroluminescent devices

Tae Ho Yeom, Soo Hyung Lee, Yun Hi Lee, Myung Hwan Oh, Sung Ho Choh

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The manganese luminescenct center in ZnS:Mn powder and thin films have been investigated as a function of Mn concentration using EPR spectrometer. While the concentration of the isolated Mn2+ ions decreases with increasing Mn concentration, the concentration of the Mn clusters increases. It is turned out that the proper Mn concentration for a good ZnS:Mn ELD is about 0.5 mole%. At high Mn concentrations, where the ZnS powder has a dominant hexagonal phase, the Mn ion still prefers to substitute for Zn in ZnS:Mn at the cubic site rather than at the hexagonal site. The isolated Mn2+ ions seem to be changed to monovalent Mn1+ after aging of ZnS:Mn ELD.

Original languageEnglish
Pages (from-to)S577-S581
JournalJournal of the Korean Physical Society
Issue numberSUPPL. 3
Publication statusPublished - 1996

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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