Solar cell with improved printed contact and method of making th

Details Solar cell with improved printed contact and method of making th Solar cell with improved printed contact and method of making th

1978-03-27

1979-08-21

Weisstuch, Aaron

Batteries: thermoelectric and photoelectric

Thermoelectric

Radiation pyrometer

29572, 29589, 357 30, 357 65, 357 67, 357 71, 427 75, 427 88, H01L 3106

Patent

active

041652410

ABSTRACT:
A silicon solar cell having a body of boron doped P-type silicon material with a shallow P/N junction formed therein through diffusion of phosphorous into one surface thereof. A contact pattern of conductive material is formed on the surface of the solar cell in which the P/N junction is formed. The pattern is formed by first depositing a metallic layer upon the entire surface of the body and then applying the contact pattern by printing upon the surface of the metal. The metal has a characteristic such that when heated in the presence of oxygen to an appropriate temperature to fire the conductive material, it oxidizes and forms an anti-reflective layer on the surface of the cell except in those areas where the printed contact pattern is disposed. In the areas of the printed contact pattern the metal forms an ohmic contact between the surface of the silicon and the printed contact pattern and provides a barrier to preclude the conductive contact pattern material from punching through the shallow P/N junction.

REFERENCES:
patent: 3664874 (1972-05-01), Epstein
patent: 3943003 (1976-03-01), Dendall
patent: 3949463 (1976-04-01), Lindmayer et al.

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