Batteries: thermoelectric and photoelectric – Thermoelectric – Radiation pyrometer
Patent
1977-04-14
1978-10-24
Weisstuch, Aaron
Batteries: thermoelectric and photoelectric
Thermoelectric
Radiation pyrometer
136 89CD, 136 89CC, 29572, 427 74, 427110, 357 16, 357 30, 357 59, H01L 3106
Patent
active
RE0298123
ABSTRACT:
A large area photovoltaic cell comprising a layer of multicrystalline cadmium sulfide, about 1 to 2 microns thick, formed by simultaneously spraying two suitably selected compounds on a uniformly heated plate of Nesa glass, thereafter forming a coating of Cu.sub.2 S by spraying two suitable compounds over the cadmium sulfide layer while the latter is heated, to form a photovoltaic heterojunction, applying thereover a layer of CuSO4, and applying electrodes of Cu and Zn, respectively, to separated areas of the layer of CuSO.sub.4, and heating the cell to form a cuprous oxide rectifying junction under the copper electrode by reaction of the Cu electrode with the CuSO.sub.4, while diffusing the zinc through the body of the cell. The diffusion of the zinc provides a negative electrode coplanar with the positive copper electrode, eliminating any need for introducing mechanically complex provision for making a connection to the Nesa glass, while the use of a rectifying positive electrode enables use of a layer of CdS only 1 to 2 microns thick, rather than the usual 20 microns, despite the fact that such thin layers tend to have pinholes, which in the prior art render the cells inoperative but in the present teaching do not.
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Jordan John F.
Lampkin Curtis M.
Photon Power, Inc.
Weisstuch Aaron
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