The present invention is generally directed to a hole transport polymer comprising a polymeric backbone having linked thereto a plurality of substituents comprising fused aromatic ring groups, with the proviso that the polymer does not contain groups selected from triarylamines and carbazole groups....http://www.google.fr/patents/US7402342?utm_source=gb-gplus-shareBrevet US7402342 - Hole transport polymers and devices made with such polymers
Hole transport polymers and devices made with such polymers
