Photoelectrochemical cell
First Claim
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1. A photoelectrochemical cell comprising a semiconductive intrinsic amorphous silicon hydride cathode.
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Abstract
A photoelectrochemical cell is provided having an amorphous silicon electrode. A system employing a V+3 /V+2 redox system is described which enables the amorphous silicon electrode to function as the cathode, reducing the rate of photo-oxidation during the operation of the photoelectrochemical cell to convert solar energy to electricity.
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15 Claims
- 1. A photoelectrochemical cell comprising a semiconductive intrinsic amorphous silicon hydride cathode.
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10. A method for generating an electric current comprising providing a liquid dispersion or solution of a redox couple selected from V+3 /V+2 and Eu+3 /Eu+2, a semiconductive intrinsic amorphous silicon hydride cathode contacting the liquid dispersion or solution, and a noble metal anode contacting the liquid dispersion or solution;
- providing a complete path for the flow of electrical current from the anode to the cathode; and
exposing the semiconductive intrinsic silicon hydride cathode to light of wavelength less than about 720 nm. - View Dependent Claims (11, 12, 13, 14)
- providing a complete path for the flow of electrical current from the anode to the cathode; and
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15. A photoelectrochemical cell comprising a semiconductive intrinsic amorphous silicon hydride cathode and a redox couple selected from the group consisting of Vn+1 /Vn and Eun+1 /Eun, where n is at least 2.
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