A layer configuration on a support, the layer configuration comprising a non-photoactive element exclusive of poly(3,4-alkylenedioxythiophene)s, poly(3,4-dialkoxythiophene)s, polyanilines and polypyrroles, said element containing at least one polymer selected from the group consisting of polysulphato-polymers and polysulpho-polymers, the surface of one side of the element being contiguous with a positive electrode and the surface on the opposite side of the element being contiguous with a material capable of transporting holes.