Fast transient photoconductivity in polydiacetylene: carrier photogeneration, carrier mobility and carrier recombination

The authors present a critical examination of the generation, recombination, and transport properties of the prototype one-dimensional photoconductor, PDA-TS. New sweepout measurements provide greater details of the temporal evolution of the photocurrent waveform. The data demonstrate that the carrier drift velocity is proportional to the external applied field in the time regime of less than 100 ns; the results yield a drift mobility of approximately 5 cm 2 (V s) -1 . They critically examine the previous studies of Donovan and Wilson (1989), and demonstrate by direct comparison with the experimental observations that the assumptions underlying their analysis of the data are not valid.