The effect of temperature on carrier transport in molecularly doped polycarbonate

The effect of elevated temperature on the pattern of current transients and the hole mobility in polycarbonate doped with 20 and 30 wt % aromatic hydrazone was studied. With the use of homogeneous carrier generation mode, it was found that the shape of the current transient varies with an increase in the temperature in qualitative agreement with the prediction of the multiple-trapping theory with the exponential trap energy distribution. The apparent activation energy of hole mobility is 0.41 eV in the classical measurement mode and 0.55 eV in the case of homogeneous irradiation.