NOVELTY - A photovoltaic cell (600) for converting light source into electricity comprises housing with partially transparent cell wall; electrolyte with iodine-based redox species; partially transparent conductive coating (32); anode with porous film for making intimate contact with species, where film has chemically bonded titanium dioxide nanoparticles and dye; and cathode having conductive carbon layer (185) and catalytic component (190) for catalyzing redox reaction. The carbon layer has carbon black particles; graphite powder; expanded graphite particles; and titanium dioxide particles.    USE - As photovoltaic cell for converting a light source into electricity (claimed); as solar cell.    ADVANTAGE - The photovoltaic cell is improved iodine-based dye cell having sintered cathode layer.    DETAILED DESCRIPTION - A photovoltaic cell (600) for converting a light source into electricity comprises a housing adapted to enclose the cell and including at least partially transparent cell wall, where wall has interior surface; an electrolyte disposed within the wall and containing an iodine-based redox species; at least partially transparent conductive coating (32) disposed on the interior surface of wall, within the cell; an anode disposed on the conductive coating and including a porous film adapted to make intimate contact with the redox species, where film includes chemically bonded titanium dioxide nanoparticles, and a dye, absorbed on a surface of the porous film, where dye and film are adapted to convert photons to electrons; and a cathode disposed within an interior surface of housing and disposed opposite the anode, where the cathode includes a conductive carbon layer (185), and a catalytic component (190), associated with the layer and adapted to catalyze a redox reaction of the redox species, where the carbon layer is adapted to transfer electrons from the catalytic component to a current collection component of cathode, where the carbon layer and catalytic component are disposed in electrolytic communication, via the electrolyte, with the porous film, where the conductive carbon layer includes carbon black particles; graphite powder; expanded graphite particles; and titanium dioxide particles, where the titanium dioxide particles of the conductive carbon layer are chemically bonded to the expanded graphite particles. The conductive carbon layer is a sintered conductive carbon layer. The porous film is sintered to the conductive coating. The cell further comprises a porous separator layer (125) interdisposed between the porous film of the anode and the catalytic component of the cathode, where the porous separator layer includes a spacing element that is physically distinct with respect to the porous film of the anode and the spacing element is structural elements consisting of glass fiber and microporous polymer; at least one metal strip or wire (110), electrically associated with the anode and with the conductive coating. An INDEPENDENT CLAIM is included for producing a photovoltaic cell for converting a light source into electricity involving providing housing adapted to enclose the photovoltaic cell and including at least partially transparent cell wall, where the cell wall has an interior surface; at least partially transparent conductive coating disposed on the interior surface of the cell wall, within the photovoltaic cell; an anode disposed on the conductive coating; and providing a cathode generally opposite the anode, where the cathode includes a sintered conductive carbon layer and the conductive carbon layer includes carbon black particles, graphite powder, expanded graphite particles, and titanium dioxide particles, where the carbon black particles, the graphite powder, the expanded graphite particles, and the titanium dioxide particles are intimately dispersed, and the titanium dioxide particles of the conductive carbon layer are chemically bonded to the expanded graphite particles.    DESCRIPTION OF DRAWING(S) - The figure shows schematic cross-sectional view of photovoltaic cell having biplate construction and a sintered cathode layer.    Photoanode support glass (30)    Transparent conductor layer (32)    Parallel wires or strips such as wire (110)    Inert conducting ceramic adhesive (115)    Porous, laid-on separator (125)    Sintered nanoporous titania layer (138)    Polymer sealing layer (165)    Epoxy sealing layer (170)    Conducting carbon layer (185)    Catalytic carbon layer (190)    Counter electrode (192)    Collector sheet (310)    Photovoltaic cell (600)