Electronic charge carriers, redistribution

Of special interest for thermally stimulated relaxation (TSR) is how to remove the system from equilibrium and physical phenomena that can be measured (monitored) during the relaxation process. We restrict ourselves by considering the physical phenomena, although these can also take place in chemical and biological objects. Further, among physical process, we consider only those that involve redistribution of electronic charge carriers in semiconductors during the relaxation process. 

Equation (13) represents an ordinary differential equation requiring two boundary conditions and a reference point for the potential, commonly set to zero in the bulk. If ionic defects are frozen in place and unable to move, the charge density in Poisson s equation is determined only by redistribution of electronic charge carriers that are ionized from the dopants. This is known as the Mott-Schottky approximation [18], which results in a simplification to Poisson s equation by setting Cj(x) = Cj ... 

An important feature of the electroactive polymer materials is the presence of two different kinds of mobile charge carriers, electronic and ionic. These polymers constitute mixed conductors. As in the case of ionic transfer phenomena in electrolyte solutions, there are generally two reasons for coupling between fluxes of different charge species. First creation in the concentration gradient of a charged species must be compensated by a redistribution of other components to retain the local electroneutrality of the system. Another factor is an electric field inside the polymer phase whose distribution is adjusted to the fluxes of charged species in a self-consistent way. 

Den ENGELSEN Professor Wagner distinguished two mechanisms in explaining the transient phenomena upon jumpbiassing a do polarization cell. These two mechanisms are (dis charging of the double layer capacity and redistribution of electronic carriers. From an experimental point of view, this description is satisfactory. However, in my opinion, these two mechanisms are related each other. The question now is how ... 

When a mixed ionic-electronic conductor (i.e. Lai xSrxB03.5) is subjected to an oxygen chemical potential gradient, there arises a chemical diffusion of oxygen ions down the gradient (or the diffusion of oxygen vacancies in the opposite direction) and redistribution of electronic carriers. At typical values of x (0.1 < x < 0.5), the charge neutrality condition stipulates that... 

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