TRAP-CONTROLLED DISPERSIVE TRANSPORT IN SYSTEMS OF RANDOMLY FLUCTUATING LOCALIZED STATES

Trap-controlled dispersive carrier transport and recombination are con sidered in materials with fluctuating localized states. Under these co nditions the distribution of effective activation energies (DEAE) can be different from the momentary energy distribution of localized state s. The former rather than the latter governs kinetics of all processes which are controlled by trapping and release of charge carriers. It i s shown that DEAE and the momentary distribution are rather similar fo r shallow states and can be very different for sufficiently deep traps . As a result, the fluctuations do not affect dispersive transport cha racteristics at short times but either terminate the dispersive transp ort or make its characterisrics temperature independent at longer time s.