Tandem cell for water cleavage by visible light

Details Tandem cell for water cleavage by visible light Tandem cell for water cleavage by visible light

2005-08-30

2005-08-30

Valentine, Donald R. (Department: 1742)

Chemistry: electrical and wave energy

Apparatus

Electrolytic

C204S265000, C204S278000, C204S270000, C204S258000, C204S290010

Reexamination Certificate

active

06936143

ABSTRACT:
A tandem cell or photoelectrochemical system for the cleavage of water to hydrogen and oxygen by visible light has two superimposed photocells, both cells being connected electrically. The photoactive material in the top cell is a semiconducting oxide placed in contact with an aqueous solution. This semiconducting oxide absorbs the blue and green part of the solar emission spectrum of a light source or light sources and generates with the energy collected oxygen and protons from water. The not absorbed yellow and red light transmits the top cell and enters a second photocell, the bottom cell, which is mounted, in the direction of the light behind, preferably directly behind the top cell. The bottom cell includes a dye-sensitized mesoporous photovoltaic film. The bottom cell converts the yellow, red and near infrared portion of the sunlight to drive the reduction of the protons, which are produced in the top cell during the photo catalytic water oxidation process, to hydrogen.

REFERENCES:
patent: 3925212 (1975-12-01), Tcherner
patent: 4090933 (1978-05-01), Nozik
patent: 4381978 (1983-05-01), Gratzel et al.
patent: 4466869 (1984-08-01), Ayers
patent: 4643817 (1987-02-01), Appleby
patent: 4793910 (1988-12-01), Smotkin et al.
M. Gratzel, “Photoelectrochemical solar energy conversion by dye sensitization” Abstract; Future Generation Photovoltaic Technologies. First NREL Conference, Denver, Co. Mar. 24-26, 1997; No. 404, pp. 119-127,AIP Proceedings, 1997.
S. Borman “Hydrogen from water and light”Chemical and Engineering News, US, American Chemical Society, Coloumbus, vol. 76(18), pp. 11-12.

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