Photoelectrochemical cells having gelled electrolyte

Details Photoelectrochemical cells having gelled electrolyte Photoelectrochemical cells having gelled electrolyte

1979-02-05

1980-08-12

Weisstuch, Aaron

Chemistry: electrical current producing apparatus, product, and

Deferred action type

Responsive to light

H01M 630, H01M 636

Patent

active

042174023

ABSTRACT:
Schottky and p-n type photo-electrochemical cells are disclosed. These cells are suitable for sunlight and use gelled electrolytes based either on aqueous or solvent substances. The gel is a light-transparent, inert substance. These cells have at least one electrode of a semiconductor. The second electrode may be a metal or a semiconductor of the opposite conductivity type. These gelled electrolyte cells display performance advantages over their corresponding liquid electrolyte cell structures. Higher photovoltages and photocurrents are obtained along with a reduction in the rate of undesired photo-decomposition of one of the electrodes. Furthermore, gelled electrolytes may be contained between two closely spaced electrodes. This type of cell reduces both ohmic losses and light attenuation.

REFERENCES:
patent: 4064326 (1977-12-01), Manassen et al.
patent: 4084043 (1978-04-01), Witzke et al.
patent: 4152490 (1979-05-01), Witzke
K. Nakatani et al., "Photoanodic Behavior of n-type CdS in Acetonitrile Solutions Containing Iodide Ions", J. Electrochem. Soc., vol. 125, pp. 406-409 (1978).
H. Gerischer, "Semiconductor Electrodes for Conversion & Storage of Solar Energy", Electrochemical Society Proceedings, vol. 77--6, pp. 8-29 (1977).
A. J. Nozik, "Energetics of Photoelectrolysis", Electrochemical Society Proceedings, vol. 77--3, pp. 272-289 (1977).

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