Comparative studies on EL performances of the OLEDS prepared by PVD, NCBD and ICBD methods

E. S. Kim, K. Kim, J. I. Jin, J. H. Choi

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Organic light emitting diodes (OLEDs) with the structure of indium-tin-oxide glass/spin-coated poly[2-(N-carbazolyl)-5-(2-ethylhexyloxy)-1, 4-phenylenevinylene]/8-hydroxyquinoline aluminum/Li:Al [ITO-glass/CzEH-PPV/Alq3/Li:Al] have been fabricated by applying three deposition methods: physical vapor deposition (PVD), neutral and ionized cluster beam depositions (NCBD and ICBD). Atomic force microscopy (AFM) measurements show that the weakly bound and highly directional cluster beam is effective in producing uniform flat film surfaces. Photo- and electro-luminescence (PL, EL) spectra demonstrate that the NCBD and PVD methods produce more efficient EL devices and the introduction of neutral buffer layer to the ICBD devices enhances the performances. DCM-doped devices show color-tuning capability and higher external quantum efficiency (EQE) compared to undoped devices.

Original languageEnglish
Pages (from-to)1677-1678
Number of pages2
JournalSynthetic Metals
Volume121
Issue number1-3
DOIs
Publication statusPublished - 2001 Mar 15

Keywords

  • Alq
  • Atomic force microscopy
  • DCM
  • Optical spectroscopy
  • Poly(phenylene vinylene) derivative
  • Vapor and cluster depositions

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Comparative studies on EL performances of the OLEDS prepared by PVD, NCBD and ICBD methods'. Together they form a unique fingerprint.

  • Cite this