Surface-potential decay of disordered solids

The formulae describing isothermal and thermally stimulated surface-potential decay in disordered solids, characterized by a continuous distribution of trapping states, are derived. The basic simplifying assumption is the quasi-equilibrium distribution of the majority of trapped carriers, The accuracy of the obtained formulae is estimated by comparison with the results of Monte Carlo simulations for the exponential trap distribution. (C) 2001 Elsevier Science B.V. All rights reserved.