Transient and steady state currents of γ-irradiated 70/30 (wt/wt.%) polyvinyl alcohol/glycogen blend samples undoped and doped with eosin

The transient currents, I-V characteristics and dc electrical conductivity of 70/30 (wt/wt.%) polyvinyl alcohol (PVA)/glycogen undoped and doped with eosin films have been studied under different conditions before and after irradiation by γ-doses in the range 5-100 kGy. The conduction mechanisms operative in the films at different temperature and γ-irradiation ranges are estimated from the behaviour of Log I versus V1/2 plots. The results show that both temperature and γ-irradiation affects the type of electronic transport mechanism for undoped blend sample. On doping with eosin, there is only considerable influence on the type of conduction with varying temperature but γ-doses have no significant effect. The dc conductivity for blend sample doped with eosin is found to increase by 1-2 orders of magnitude compared to the undoped sample at both different temperatures and γ-doses. The values of mobility and charge carrier concentration for all samples under investigation were found to vary from (0.26-2.22) × 10− 4m2V− 1 s− 1 and (0.52-76.20) × 1024 m− 3 respectively.