Continuous process for fabricating solar cells and the product p

Details Continuous process for fabricating solar cells and the product p Continuous process for fabricating solar cells and the product p

1976-07-06

1979-05-01

Tupman, W.

Batteries: thermoelectric and photoelectric

Thermoelectric

Radiation pyrometer

29572, 148 15, B08B 300

Patent

active

041525353

ABSTRACT:
The process comprises the following steps: (1) forming a glass sheet which defines a substrate layer for the solar cell product; (2) forming a diffusion barrier layer on at least one surface of the substrate; (3) forming a first electrically-conductive layer on the diffusion barrier, the first electrically-conductive layer being a first electrode in the solar cell product; (4) depositing small-grain polycrystalline silicon in a thin film, i.e., 10-100 micrometers, on the first electrode layer; (5) recrystallizing, typically by heating, the deposited polycrystalline silicon until it reforms into large-grain polycrystalline or single-crystal silicon; (6) forming a PN junction in the recrystallized silicon layer; and (7) forming a second electrically-conductive layer on the recrystallized silicon layer, the second electrically-conductive layer being a second electrode in the solar cell product. The solar cell product produced by the above-process may be fabricated in large surface area configurations, suitable for terrestrial as well as extra-terrestrial use, at relatively low cost.

REFERENCES:
patent: 3571915 (1971-03-01), Shirland
patent: 3585088 (1971-06-01), Schwuttke
Conf. Record, 11th IEEE Photospecialist Conf., May 6-8, 1975, "Polycrystalline Silicon Solar Cells . . . " by Chu et al., pp. 303-305.

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