Charge transport generated by electron beam in molecularly doped polymers

Charge carrier transport in a typical molecularly doped polymer has been st udied by the time-of-flight and radiation induced conductivity methods. In the time range bracketing the conventional transit time a strong disagreeme nt between two sets of data has been found. Unlike time-of-flight signal th at rather closely reproduces all salient features reported in literature, t he radiation induced conductivity transient lacks the plateau. In fact, it exhibits a strict power law decay t(-0-5) changing at long times to t(-1) o r t(-1.5) patterns due to bimolecular recombination or true transit time ef fects, respectively. At short times, both transients are described by the s ame t(-0.5) dependence. These facts suggest the dispersive rather than the Gaussian charge transport.