NOVELTY - A monolithic photovoltaic dye cell assembly having reduced ion migration through intercell junction(s), comprises electrically insulating transparent substrate (1) having first surface; photovoltaic units arranged as parallel strips on surface; sealant layer (7) partially disposed between adjacent units of photovoltaic units to electrically insulate between adjacent units; and ion-migration reduction system including first electrode and second electrode (6), electrically connected to current source and forming electrode pair.    USE - A monolithic photovoltaic dye cell assembly having reduced ion migration through at least one intercell junction for producing electricity from sunlight.    ADVANTAGE - The monolithic photovoltaic dye cell assembly provides high voltage field and high negative potential at intercell junctions close to tin oxide surface and prevents or retards iodine (iodide and tri-iodide ions) or redox ion migration across interfaces.    DETAILED DESCRIPTION - A monolithic photovoltaic dye cell assembly having reduced ion migration through intercell junction(s), comprises electrically insulating transparent substrate (1) having first surface; photovoltaic units arranged as parallel strips on surface; sealant layer (7) partially disposed between adjacent units of photovoltaic units to electrically insulate between adjacent units; and ion-migration reduction system including first electrode and second electrode (6), electrically connected to current source and forming electrode pair, and disposed within electrically-insulating sealant layer. Each photovoltaic unit includes partially transparent conductive coating (30) disposed on surface; photoanode including porous layer of polycrystalline semiconductor disposed on conductive coating, and dye which is absorbed on surface of porous layer; cathode disposed opposite the photoanode, and including conductive carbon layer; porous separator layer interdisposed between porous layer of photoanode and cathode; and electrolyte disposed within each of photovoltaic units. The porous separator layer physically separates and electrically insulates between porous layer of photoanode and cathode. The dye and porous layer convert photons to electrons. The electrolyte contains redox species. The coating is discontinuous with respect to adjacent units of photovoltaic units. The conductive carbon layer is disposed in electrolytic communication with porous layer of polycrystalline semiconductor via electrolyte. The photovoltaic units and transparent substrate form monolithic assembly. The ion-migration reduction system delivers potential from first electrode to second electrode. The first electrode is disposed between adjacent units of photovoltaic units. An INDEPENDENT CLAIM is included for reduction of ion migration through at least one intercell junction of monolithic photovoltaic dye cell assembly.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic expanded cross-sectional view of a junction between two adjacent cells of a monolithic multiple dye cell assembly.    Substrate (1)    Insulating layer (5)    Electrode (6)    Sealant layer (7)    Partially transparent conductive coating (30)