Superlattice photoelectrodes for photoelectrochemical cells

Details Superlattice photoelectrodes for photoelectrochemical cells Superlattice photoelectrodes for photoelectrochemical cells

1985-07-03

1987-01-06

Weisstuch, Aaron

Chemistry: electrical current producing apparatus, product, and

Deferred action type

Responsive to light

204290R, 204DIG3, H01M 636

Patent

active

046346414

ABSTRACT:
A superlattice or multiple-quantum-well semiconductor is used as a photoelectrode in a photoelectrochemical process for converting solar energy into useful fuels or chemicals. The quantum minibands of the superlattice or multiple-quantum-well semiconductor effectively capture hot-charge carriers at or near their discrete quantum energies and deliver them to drive a chemical reaction in an electrolyte. The hot-charge carries can be injected into the electrolyte at or near the various discrete multiple energy levels quantum minibands, or they can be equilibrated among themselves to a hot-carrier pool and then injected into the electrolyte at one average energy that is higher than the lowest quantum band gap in the semiconductor.

REFERENCES:
A. J. Nozik et al, Nature, vol. 316, Jul. 4, 1985, pp. 51-53.
M. Archer, Nature, vol. 316, Jul. 4, 1985, pp. 15-16.

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