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US 4,927,721 AGranted
Photo-electrochemical cell
OwnerMichael Gratzel, Paul Liskainventors
Life of this patent
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Abstract
The regenerative photo-electrochemical cell comprises a polycrystalline metal oxide semiconductor layer having a substantially monomolecular chromophore layer in a surface zone. The surface of the metal oxide semiconductor layer has a roughness factor of more than 20, preferably more than 200. Photo-electrochemical cells having such metal oxide semiconductors have good monochromatic efficiency using redox systems with iodides or bromides.
Claims15
A regenerative photo-electrochemical cell comprising
- a polycrystalline metal oxide semi-conductor having a surface with a roughness factor of more than 20;
- and
- a monomolecular chromophore layer on said surface of said semi-conductor.
A regenerative photo-electrochemical cell for converting sunlight to electrical energy comprising
- a polycrystalline metal oxide semi-conductor layer having a photo-electrochemically active surface with a roughness factor of more than 20;
- and
- a monomolecular chromophore layer on said surface.
A solar cell comprising
- a polycrystalline metal oxide semi-conductor layer having a photo-electrochemically active surface with a roughness factor of more than 20;
- a monomolecular chromophore layer on said surface;
- an electrolyte layer on said chromophore layer;
- an electrode on said electrolyte layer;
- and
- a support having said semi-conductor layer thereon.
3 more elements
Dependencies are inferred from the claim text.