Carbazole-based aromatic amines having oxetanyl groups as materials for hole transporting layers

Abstract

Several oxetane-functionalized aromatic amines have been synthesized by the multi-step synthetic rout. Full characterization of their structure by nuclear magnetic resonance and mass spectroscopy as well as IR spectrometry is presented. The synthesized materials were examined by various techniques including differential scanning calorimetry, thermogravimetry, UV spectrometry, electron photoemission and time of flight techniques. The electron photoemission spectra of the layers showed the ionisation potentials of 5.24–5.67 eV. Time-of-flight hole drift mobility in amorphous layers of bisphenol Z polycarbonate containing 33 wt. % of the electroactive materials ranges from 10−8 to 10−6 cm2/Vs at high electric fields.