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Aromatic polyethers with 1,3,5‐triazine units as hole blocking/electron transport materials in leds
Author(s) -
Fink Ralf,
Frenz Carsten,
Thelakkat Mukundan,
Schmidt HansWerner
Publication year - 1998
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19981250113
Subject(s) - monomer , electroluminescence , materials science , condensation polymer , electron affinity (data page) , triazine , ether , thermal stability , polymer chemistry , homo/lumo , polymer , cyclic voltammetry , glass transition , amorphous solid , light emitting diode , photochemistry , chemistry , organic chemistry , electrochemistry , electrode , layer (electronics) , nanotechnology , composite material , optoelectronics , molecule
Various difluoro functionalized aromatic 1,3,5‐triazine monomers were prepared. A series of poly‐(1,3,5‐triazine‐ether)s was synthesized by polycondensation with 4,4′‐(hexafluoroisopropylidene)diphenol. The polymers have excellent thermal stability and are amorphous with glass transition temperatures in the range of 190–250°C. In order to examine the potential to apply these polymers 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. This opens the possibility to utilize 1,3,5‐triazine containing materials as electron injecting/hole blocking layer in LEDs. First LED results are in accordance to these high electron affinities.