Influence of the deposition temperature on the structure and performance of tris(8-hydroxyquinoline) aluminum based flexible organic light-emitting devices

Guang Feng Wang, Xiaoming Tao, Hong Min Huang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

16 Citations (Scopus)

Abstract

Based on indium tin oxide (ITO)/N,N′diphenyl-N-N′-di(m-tdyl) benzidine (TPD)/Alq3/Al structure, flexible OLEDs on polyethylene terephthalate (PET) substrates were fabricated by physical vapor deposition (PVD) method. Tris(8-hydroxyquinoline)aluminum (Alq3) films were deposited at 90, 120 and 150 °C to examine the influence of the deposition temperature on the structure and performance of OLEDs. Electroluminescence (EL) spectra and current-voltage-luminance (I-V-L) characteristics of the OLEDs were examined. It was found that the device fabricated at a high temperature had a higher external efficiency and longer lifetime. Atomic force microscope (AFM) was adopted to characterize the surface morphology of ITO/TPD/Alq3. The higher uniform morphology of the Alq3formed at high temperature might contribute to the performance improvement of the OLEDs.
Original languageEnglish
Pages (from-to)4463-4466
Number of pages4
JournalApplied Surface Science
Volume253
Issue number10
DOIs
Publication statusPublished - 15 Mar 2007

Keywords

  • AFM
  • Alq 3
  • Organic light-emitting device
  • PVD

ASJC Scopus subject areas

  • Surfaces, Coatings and Films

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