ABSTRACT
In some models, developed in a previous paper [5], it turns out that the theoretical analysis of asymptotic behavior under electroneutrality is not in total adequacy with numerical results. This observation has initialized a new analysis of the electrical part of the model which shows that another phenomenon, very similar to what happens for reverse-bias semiconductors, must be taken into account. Roughly speaking it is necessary to introduce another small parameter in the boundary conditions for potential to take into account the large value of the applied potential. The main scope of the paper is to analyze this question by providing some results which, in some aspects, are related to those obtained by [3] and to present the corresponding numerical results.
