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Proceedings Paper

Aromatic ethers with 1,3,5-triazine units as hole-blocking/electron-transport materials in LEDs
Author(s): Ralf Fink; Carsten Frenz; Mukundan Thelakkat; Hans-Werner Schmidt
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Paper Abstract

Various fluoro-functionalized aromatic 1,3,5-triazine monomers were prepared. A series low molar mass and poly- (1,3,5-triazine)-ethers were synthesized by a condensation reaction. The polymers as well as the low molar mass compounds have excellent thermal stability and are amorphous. In order to examine the potential to apply these compounds in organic electroluminescent devices, the redox properties were studied by cyclic voltammetry. It was found that the monomers have high electron affinity and reach LUMO values in the range of -2.7 to -3.1 eV. Additionally high oxidation stability with HOMO values lower than -6.4 eV follows hole blocking capabilities. This opens the possibility to utilize 1,3,5-triazine containing materials as electron injection/hole blocking layer in LEDs. First LED results are in agreement to these high electron affinities.

Paper Details

Date Published: 1 December 1997
PDF: 7 pages
Proc. SPIE 3148, Organic Light-Emitting Materials and Devices, (1 December 1997); doi: 10.1117/12.279341
Show Author Affiliations
Ralf Fink, Univ. Bayreuth (Germany)
Carsten Frenz, Univ. Bayreuth (Germany)
Mukundan Thelakkat, Univ. Bayreuth (Germany)
Hans-Werner Schmidt, Univ. Bayreuth (Germany)

Published in SPIE Proceedings Vol. 3148:
Organic Light-Emitting Materials and Devices
Zakya H. Kafafi, Editor(s)

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