A morphologically stable host material for efficient phosphorescent green and red organic light emitting devices

Meng Huan Ho*, Banumathy Balaganesan, Ta Ya Chu, Teng-Ming Chen, Chin H. Chen

*Corresponding author for this work

Research output: Contribution to journalArticle

36 Scopus citations

Abstract

A carbazole-based host material, 4,4′-N,N′-[di(3, 6-di(t-butyl)carbazole]biphenyl (ttbCBP), with four t-butyl steric spacers on peripheral carbazole moieties was effectively synthesized through Friedel-Crafts Alkylation. Owing to the presence of sterically hindered t-butyl groups, ttbCBP exhibits a high glass transition temperature (175 °C) and is morphologically stable. This host material also preserves the characteristics of wide band-gap of 3.2 eV and high triplet energy of 2.64 eV. In addition, ttbCBP has been shown to be effective hosts for green and red phosphorescent emitters in organic electrophosphorescent devices.

Original languageEnglish
Pages (from-to)943-947
Number of pages5
JournalThin Solid Films
Volume517
Issue number2
DOIs
StatePublished - 28 Nov 2008

Keywords

  • Carbazole
  • Host material
  • Organic electroluminescent devices
  • Phosphorescence

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