Photocarrier generation quantum efficiencies of columnar discotic liquid crystals are determined using DC photoconduction. Photoaction spectra, of single triphenylene and binary systems comprising 50:50 stoichmetric mixtures of triphenylene with a larger triphenylene based macrocycle, demonstrate that the main, generation process is due to the excitation of the smaller triphenylene molecule. Other transient photoconduction experiments have shown that carriers trap in the crystalline phase of the single systems while time of flight signals are obtained in the mesophase. Temperature dependence experiments allow carrier range to be determined in the crystalline phase for the single material and demonstrate that charge transits the binary system in both the mesophase and glassy phase.