Blue emitting fluorophores of phenyleneethynylenes substituted by diphenylethenyl terminal groups for organic light-emitting diodes

Guoliang Mao, Akihiro Orita, Larysa Fenenko, Masayuki Yahiro, Chihaya Adachi, Junzo Otera

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

Phenyleneethynylene motifs substituted by diphenylethenyl groups at both ends were prepared successfully by use of double elimination protocol of β-substituted sulfones for introducing phenyleneethynylene arrays followed by Wittig-Horner reaction for introducing diphenylethenyl moiety. The hybrid blue fluorophores exhibited strong emission even in the solid-state films (ΦF ≧ 0.60) while, in CHCl3 solution, incorporation of substituents on the central phenylene unit significantly enhanced emission efficiency up to ΦF = 0.57. The OLED devices with use of these blue fluorophores as an emitting material provided maximum external quantum efficiency of ηext = 2.4%.

Original languageEnglish
Pages (from-to)378-384
Number of pages7
JournalMaterials Chemistry and Physics
Volume115
Issue number1
DOIs
Publication statusPublished - May 15 2009

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics

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