Poly-TPD for charge transport materials and electroluminescence of single layer devices

In order to enhance the thermal stability of TPD (Triphenylamines Derivatives) for hole transport materials and device durability, a series of novel electroluminescent polymers with charge transporting properties were synthesized by condensation polymerization using TPD with di-halide through the Friedel-Crafts reaction, which TPD units were introduced into the main chain of polymers. It was found that all poly-TPD had almost the same structure of energy band as that of TPD itself and had better thermal stability. Some of polymers can transport holes as well as electrons. Their properties for electroluminesence of single layer devices were investigated. The results show that the devices emitted the maximum luminescence of about 36 cd·m^-2 at 17 V and the maximum emission of the device was 460 nm.