Patent ID: 7420117

Claim:
A photovoltaic cell comprising: a first substrate having a first electrode layer ( 1 ) on the surface and having a porous metal oxide semiconductor film ( 2 ) which is formed on the first electrode layer ( 1 ) and on which a photosensitizer is adsorbed, a second substrate having a second electrode layer ( 3 ) on the surface, both of said substrates being arranged in such a manner that the first electrode layer ( 1 ) and the second electrode layer ( 3 ) face each other, and an electrolyte layer provided between the porous metal oxide semiconductor film ( 2 ) and the second electrode layer ( 3 ), wherein the semiconductor film ( 2 ) includes metal oxide particles and contains an inhibitor of back current, each of the metal oxide particles for constituting the semiconductor film being coated with a layer of the inhibitor of back current, and at least one pair of substrate and electrode layer thereon have transparency.