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

Ayataka Endo, Chihaya Adachi

Research output: Contribution to journalArticlepeer-review

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

All Science Journal Classification (ASJC) codes

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

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