Highly efficient single-layer dendrimer light-emitting diodes with balanced charge transport

TD Anthopoulos, JP Markham, EB Namdas, Ifor David William Samuel, SC Lo, PL Burn

Research output: Contribution to journalArticlepeer-review

130 Citations (Scopus)

Abstract

High-efficiency single-layer-solution-processed green light-emitting diodes based on a phosphorescent dendrimer are demonstrated. A peak external quantum efficiency of 10.4% (35 cd/A) was measured for a first generation fac-tris(2-phenylpyridine) iridium cored dendrimer when blended with 4,4(')-bis(N-carbazolyl)biphenyl and electron transporting 1,3,5-tris(2-N-phenylbenzimidazolyl)benzene at 8.1 V. A maximum power efficiency of 12.8 lm/W was measured also at 8.1 V and 550 cd/m2. These results indicate that, by simple blending of bipolar and electron-transporting molecules, highly efficient light-emitting diodes can be made employing a very simple device structure. (C) 2003 American Institute of Physics.

Original languageEnglish
Pages (from-to)4824-4826
Number of pages3
JournalApplied Physics Letters
Volume82
Issue number26
DOIs
Publication statusPublished - 30 Jun 2003

Keywords

  • PHOSPHORESCENT EMISSION
  • CONJUGATED POLYMERS
  • DEVICES
  • GENERATION

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