The charge carrier mobility in bulk samples of regioregular poly-3-hexylthi
ophene is determined from -100 to +140 degreesC with the pulse-radiolysis t
ime-resolved microwave conductivity technique. The lower limit to the mobil
ity obtained increases only slightly with temperature in this range from 0.
003 cm(2)/Vs to 0.01 cm(2)/Vs. However, the decay kinetics of the charge ca
rriers is strongly dependent on temperature. This is attributed to changes
in the effective domain size in which the charge carriers are able to move.