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.