Hole transport polymers with improved interfacial contact to the anode material

New hole transport polymers have been prepared through copolymerization of a fluorinated triphenyl diamine derivative and trimethoxyvinylsilane. The m odification with trimethoxy-silane groups has resulted in materials which c an be cross-linked through hydrolysis and are capable of forming covalent c hemical bonds to oxidic surfaces. Organic light-emitting diodes containing these polymers show decreased operating voltages and enhanced operational s tability due to improved interfacial contact between the hole transport lay er and the anode.