Device of the solid-electrolyte electrochemical cell type

摘要

A device comprising an inhomogeneous solid electrolyte of doped materials which are exclusive conductors for a predetermined chemical species. The electrolyte has a first region and a second surface region, the thickness of which is usually less than 400 ANGSTROM . In a first alternative embodiment, the second region is formed by increasing the doping percentage of the material constituting the first region. In a second alternative embodiment, the second region is formed by depositing a thin film of doped material chosen so as to ensure that the work function to be provided by the predetermined chemical species is of lower value than in the case of the doped material constituting the first region.