Donor-Substituted 1,3,5-Triazines as Host Materials for Blue Phosphorescent Organic Light-Emitting Diodes

  • Rothmann M
  • Haneder S
  • Da Como E
 et al. 
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Abstract

A series of new donor-substituted 1,3,5-triazines ({TRZ} 1?7) has been prepared by nucleophilic substitution of cyanuric chloride with carbazole, 3-methylcarbazole, phenol, and 3,5-dimethylphenol. These s-triazines have been investigated as host material for blue phosphorescent light-emitting diodes ({OLEDs}). All triazine based hosts were characterized regarding their optical and thermal properties. Different substitution patterns resulted in high glass-transition temperatures (Tg) of up to 170 °C and triplet energies (?E(T1?S0)) of up to 2.96 {eV}. The application as host material for the blue phosphor bis(4,6-difluorophenylpyridinato-N,C2)picolinato-iridium({III}) ({FIrpic}) yielded maximum current efficiencies up to 21 cd/A.

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Authors

  • Michael M Rothmann

  • Stephan Haneder

  • Enrico Da Como

  • Christian Lennartz

  • Christian Schildknecht

  • Peter Strohriegl

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