Journal
CHEMISTRY OF MATERIALS
Volume 22, Issue 7, Pages 2403-2410Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cm9033879
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Funding
- BMBF
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A series of new donor-substituted I,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 (T-g) of up to 170 degrees C and triplet energies (Delta E(T-1-S-0)) of up to 2.96 eV. The application as host material for the blue phosphor bis(4,6-difluorophenylpyridinato-N,C2)picolinato-iridium(M) (FIrpic) yielded maximum current efficiencies up to 21 cd/A.
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