883224-27-9Relevant articles and documents
Well defined carbazol-3,9-diyl based oligomers as host materials for organic electro-phosphorescent devices
Grigalevicius, Saulius,Grazulevicius, Juozas V.,Tsai, Ming-Han,Wu, Chung-Chih
, p. 77 - 86 (2007)
Well defined carbazol-3,9-diyl-based derivatives as host materials for electro-phosphorescent devices have been synthesized by the modified Ullmann reaction as a key step. The full characterization of their structure by mass spectrometry, infrared absorption and proton magnetic resonance spectroscopy is presented. The amorphous compounds with glass transition temperatures of 103-154C possess high thermal stability with onset decomposition temperatures exceeding 360C. Conjugation of the 3,9-linked systems is rather confined within one carbazole unit, retaining large triplet energies suitable for green and red electro-phosphorescence. Using the new host material, efficient green phosphorescent organic light emitting diodes was demonstrated.
