Metal working – Method of mechanical manufacture – Assembling or joining
Patent
1978-07-17
1979-09-18
Esposito, Michael F.
Metal working
Method of mechanical manufacture
Assembling or joining
427 74, 427123, 427126, 427399, 427430B, 136 89CD, H01L 3118, H01L 3104
Patent
active
041678052
ABSTRACT:
An improved method for fabrication of a photovoltaic cell preferably of the CdS--Cu.sub.x S type, having a copper electrode adjacent the Cu.sub.x S. A portion of the CdS is converted to Cu.sub.x S through ion exchange wherein the CdS is immersed in a first solution of cuprous ions and a second solution of cupric ions to produce a non-stoichiometric Cu.sub.x S. A layer of metallic copper is applied by conventional techniques, such as vacuum deposition, and the photovoltaic cell heat treated to affect formation of the CdS--Cu.sub.x S heterojunction. Metallic copper diffusing through the CdS and Cu.sub.x S from the electrode is captured by the non-stoichiometric Cu.sub.x S whereby the Cu.sub.x S is substantially stoichiometric in the completed photovoltaic cell.
REFERENCES:
patent: 3374108 (1968-03-01), Keramidas
patent: 3416956 (1968-12-01), Keramidas
patent: 3884779 (1975-05-01), Duy
patent: 3888697 (1975-06-01), Bogus
patent: 3975211 (1976-08-01), Shirland
patent: 4086779 (1978-04-01), Jordan
TeVilde, "Production ... Solid State Reaction", Energy Conversion, vol. 15, pp. 111-115, (7-1975).
Esposito Michael F.
Photon Power, Inc.
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