Photoluminescence characteristics of organic host materials with wide energy gaps for organic electrophosphorescent devices

Ayataka Endo, Chihaya Adachi

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The photoluminescence, i.e., fluorescence and phosphorescence, characteristics of host materials with wide energy gaps suitable for phosphorescence-based organic light-emitting diodes (OLEDs) are summarized. In the vacuum deposited films, the host materials show phosphorescent emission in the blue to green region and triplet energy levels of ET = 2.6-3.1 eV because of the presence of steric hindrance. An OLED containing 1,2,3,4-tetraphenyl-5-(3-pyridyl)benzene as a host and iridium(III) bis[(4,6-difluorophenyl)-pyridinato-N,C2]picolinate as a blue emissive phosphorescent dopant exhibits an external electroluminescence efficiency of ∼12%.

Original languageEnglish
Pages (from-to)502051-502053
Number of pages3
JournalJapanese journal of applied physics
Volume49
Issue number5 PART 1
DOIs
Publication statusPublished - May 1 2010

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Phosphorescence
Organic light emitting diodes (OLED)
phosphorescence
organic materials
Photoluminescence
Energy gap
light emitting diodes
photoluminescence
Iridium
Electroluminescence
iridium
electroluminescence
Electron energy levels
Benzene
energy levels
Fluorescence
benzene
Doping (additives)
Vacuum
fluorescence

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Photoluminescence characteristics of organic host materials with wide energy gaps for organic electrophosphorescent devices. / Endo, Ayataka; Adachi, Chihaya.

In: Japanese journal of applied physics, Vol. 49, No. 5 PART 1, 01.05.2010, p. 502051-502053.

Research output: Contribution to journalArticle

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