Flash-photolysis time-resolved microwave conductivity of a poly(3-hexylthiophene) thin film

The transient conductivity of a spincoated poly(3-hexylthiophene) film upon laser excitation is probed using an electrodeless microwave conductivity technique which circumvents the drawbacks of electrode contacts, space charge and polarization in conventional DC methods. The dependence of the kinetics and the peak values of the conductivity transients is investigated as a function of excitation wavelength and intensity. From these results, insight into the mechanism of charge carrier generation, mobility and decay can be obtained.