Optimization of orange-emitting electrophosphorescent copolymers for organic light-emitting diodes

Andreas Haldi, Alpay Kimyonok, Benoit Domercq, Lauren E. Hayden, Simon C. Jones, Seth R. Marder, Marcus Weck, Bernard Kippelen

Research output: Contribution to journalArticlepeer-review

Abstract

Orange-emitting phosphorescent copolymers containing iridium complexes and bis(carbazolyl)fluorene groups in their side chains are employed as the emissive layer in multilayer organic light-emitting diodes (OLEDs). The efficiency of the OLED devices is optimized by varying characteristics of the copolymers: the molecular weight, the iridium loading level, and the nature and length of the linker between the side chains and the polymer backbone. A maximum efficiency of 4.9 ± 0.4%, 8.8 ± 0.7 cd A-1 at 100 cd m-2 is achieved with an optimized copolymer.

Original languageEnglish (US)
Pages (from-to)3056-3062
Number of pages7
JournalAdvanced Functional Materials
Volume18
Issue number19
DOIs
StatePublished - Oct 9 2008

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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