Anthracene derivatives as efficient emitting hosts for blue organic light-emitting diodes utilizing triplet-triplet annihilation

Hirohiko Fukagawa, Takahisa Shimizu, Noriyuki Ohbe, Shizuo Tokito, Katsumi Tokumaru, Hideo Fujikake

Research output: Contribution to journalArticlepeer-review

80 Citations (Scopus)

Abstract

The molecular design strategies for the host materials suitable for highly efficient, blue fluorescent organic light-emitting diodes (OLEDs) are demonstrated. The device characteristics of blue fluorescent OLEDs are compared with different host materials. Some devices exhibit a highly efficient blue electroluminescence with a high external quantum efficiency of more than 7%. The correlation between OLED efficiency and triplet-triplet annihilation is characterized by measuring the up-conversion of triplet excited states into singlet ones. The host materials require an anthracene unit and a bulky molecular structure to prevent the overlap of anthracene units between adjacent molecules in the film.

Original languageEnglish
Pages (from-to)1197-1203
Number of pages7
JournalOrganic Electronics
Volume13
Issue number7
DOIs
Publication statusPublished - 2012 Jan 1
Externally publishedYes

Keywords

  • Anthracene
  • Blue organic light-emitting diode
  • Triplet-triplet annihilation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry
  • Electrical and Electronic Engineering

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