Thermally stimulated currents in amorphous solids at mixed carrier recombination, Part II: Quasi-equilibrium approximation

Thermally stimulated carriers (TSCs) in amorphous materials are investigated theoretically for the case of ‘mixed carrier recombination’, when the recombination rate is the sum of terms corresponding to monomolecular and bimolecular one. The basic approximations are quasi-equilibrium carrier distribution in the traps and low trap occupancy. The accuracy of the obtained formulas is verified for the case of exponential trap distribution by comparison of TSC curves calculated analytically and numerically. Methods of determining the trap distribution and the carrier recombination kinetics from experimental data are discussed.