Leitfaehigkeit eindimensionaler periodischer elektrischer Netze

The Dirichlet's principle and the Thomson's principle have been used to study the asymptotic behaviour of resistance of a 1-dimensional periodic electric network. (orig.)SIGLEAvailable from TIB Hannover: RR 5549(209)+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

A mean field approximation for hopping transport in disordered materials

By a mean field approximation a macroscopic charge transport equation is derived from a hopping model with long range interaction. The transport coefficients are calculated from microscopic hopping characteristics of the disordered medium. (orig.)SIGLEAvailable from TIB Hannover: RR 5549(294)+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

Ladungstransport und Oberflaechenpotentialkinetik in ungeordneten duennen Schichten

Starting from a microscopic model of the solid a macroscopic nonlinear partial differential equation describes the space charge evolution process in dependence of the energetic distribution of the localized states, electric field strenght a.s.o. Using definite boundary and initial conditions the transport equation can be solved numerically and allows the calculation of important observables. A very useful observable both from the scientific and technological point of view is the surface potential and his kinetic. Therefore, the surface potential kinetics is discussed thoroughly in dependence on material parameters, film thickness, and surface charge. Furthermore, it could be calculated the space charge evolution process, the conductivity, transit time, and the concentration of localized states. The interpretation and the numerical solution of the presented transport equation give a new insight in fundamental problems of charge carrier transport in disordered materials. (orig.)SIGLEAvailable from TIB Hannover: RR 5549(44)+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman