Decrease of the number of the isolated emission center Mn2+ in an aged ZnS: Mn electroluminescent device

Yun-Hi Lee, D. H. Kim, Byeong Kwon Ju, M. H. Song, T. S. Hahn, S. H. Choh, M. H. Oh

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

We observed a decrease of the number of effective emission centers Mn 2+ in the aged ZnS:Mn electroluminescence (EL) devices compared to the fresh EL devices using the electron-paramagnetic-resonance technique. Such phenomena can take place during the operation of the EL device, since the isolated Mn can easily diffuse into another site and forming cluster. Another possible explanation is that Mn2+ changes into Mn1+ or Mn3+ by transferring the electronic charge of the isolated Mn 2+ to the neighboring Mn ions via sulfur and/or sulfur vacancy. As a result, luminance is lowered due to the decrease in the number of efficient emission centers of isolated Mn2+.

Original languageEnglish
Pages (from-to)4253-4257
Number of pages5
JournalJournal of Applied Physics
Volume78
Issue number6
DOIs
Publication statusPublished - 1995 Dec 1
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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