Charge transport in phenazine-fused triphenylene discotic mesogens doped with CdS nanowires

Herein, we report the synthesis of oleylamine-capped CdS nanowires (NWs) and the dispersion of a small optimized amount of these NWs in the Col(h)phase of a recently synthesized phenazine-fused-triphenylene discotic liquid crystal (PFT DLC) to understand the temperature-dependent charge transportviathe time-of-flight technique. X-ray diffraction study reveals a reduction in core-core separation; however, upon doping CdS NWs, we observed a trivial decrease in hole mobility. For the PFT-DLC and its composite, the hole mobility was found to be in the range of 0.07-0.43 x 10(-3)cm(2)V(-1)s(-1)following the inverse-power law as a function of temperature. This could be due to the large size of the CdS NWs, which eventually disturb the Col(h)packing and hence the charge carrier mobility. Besides, a nanocomposite device consisting of the heterojunction of ITO-PFTDLC/CdS-Au has been constructed andI-Vcharacteristics were obtained, which obey Ohm's law under a limiting case of the Poole-Frenkel conduction mechanism.