Article with thin film coating having an enhanced emissivity and

Details Article with thin film coating having an enhanced emissivity and Article with thin film coating having an enhanced emissivity and

1986-04-18

1988-11-08

Kittle, John E.

Stock material or miscellaneous articles

Composite

Of silicon containing

425428, 425432, 425696, 425697, 425701, 425702, 350 16, 136256, B32B 904, B32B 1706, G02B 522, H01L 3100

Patent

active

047833734

ABSTRACT:
A coating useful for a solar cell is formed by concurrent deposition of two materials, such as silicon dioxide and magnesium fluoride, on a substrate within a single vacuum chamber. The deposition is monitored to enable control of the ratio of the materials and the thickness of the coating. An alternative embodiment of a coating employs alternating layers of different materials which form pairs or periods, each having a very small optical thickness. By virtue of the coatings, emissivity is enhanced by suppression of the reststrahlen reflectance and solar absorption is reduced by external reflection of the ultraviolet portion of the solar spectrum.

REFERENCES:
patent: 4293732 (1981-10-01), Rancourt et al.
patent: 4372987 (1983-02-01), Ganner et al.
patent: 4578527 (1986-03-01), Rancourt et al.
patent: 4599272 (1986-07-01), Ichikawa

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