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Aggregation and permeation of 4-(dicyanomethylene)-2-methyl-6-(p- dimethylaminostyryl)-4H-pyran molecules in Alq

  • G. Y. Zhong
  • , Z. Xu
  • , J. He
  • , S. T. Zhang
  • , Y. Q. Zhan
  • , X. J. Wang
  • , Z. H. Xiong
  • , H. Z. Shi
  • , X. M. Ding
  • , W. Huang
  • , X. Y. Hou
  • Fudan University

Research output: Contribution to journalArticlepeer-review

40 Scopus citations

Abstract

The morphologic and luminescent behaviors of various 4-(dicyanomethylene)- 2methyl-6-(p-dimethylaminostyryl)-4H-pyran (DCM) containing films have been investigated. This involves pure DCM layers deposited on top of a tris-(8-hydroxyquinoline) aluminum (Alq) layer or positioned between two Alq layer, DCM-doped Alq films, and periodically arranged Alq/DCM multilayer structures. The occurrence over a period of time of aggregation and permeation of DCM molecules at room temperature and at temperatures as low as ∼260K is found in all the cases studied. Such a phenomenon will result in degradation of related organic light-emitting devices and is closely related to the electric polarity of the DCM molecule.

Original languageEnglish
Pages (from-to)1122-1124
Number of pages3
JournalApplied Physics Letters
Volume81
Issue number6
DOIs
StatePublished - 5 Aug 2002
Externally publishedYes

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