Low reflectivity surface formed by particle track etching

Details Low reflectivity surface formed by particle track etching Low reflectivity surface formed by particle track etching

1979-01-26

1981-05-19

Powell, William A.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

156643, 156654, 156663, 156668, B44C 122, C03C 1500, C03C 2506, B29C 1708

Patent

active

042683475

ABSTRACT:
Low reflectivity surfaces are formed by particle track etching of a dielectric material such that the horizontal scale of surface texture is less than the wavelength of incident radiation and the depth of texture is equal to or greater than said wavelength. As a consequence, the reflection coefficient is thereby reduced by a factor of at least two, and light is more efficiently transmitted into the material. For solar cells encapsulated in transparent material, efficiency of absorption of solar radiation may be improved by at least about two times per etched surface, or to less than about 2% for the air/transparent material interface and to less than about 15% for the transparent material/solar cell interface.

REFERENCES:
patent: 3808068 (1974-04-01), Johnson et al.
patent: 3811999 (1974-05-01), Fleischer et al.
patent: 3852134 (1974-12-01), Bean
patent: 4147564 (1979-04-01), Magee et al.
Endeavor, vol. 26, pp. 79-84 (1967), Structural and Functional Adaptation in a Visual System, by C. G. Bernhard.
Nuclear Tracks in Solids, Principles and Application by R. L. Fleischer et al., 1975, pp. 16, 18-20, 65-72 and 75.
Nature, vol. 244, Aug. 3, 1973, pp. 281-282.
J. Voc. Sci. Technol., vol. 12, No. 5, Sep./Oct. 1975, Solar-Energy Materials Preparation, Techniques by D. M. Mattox, pp. 1023-1031.
J. Opt. Soc. Am., vol. 66, No. 6, Jun. 1976, Single-Layer, Gradient Refractive Index Antireflection Films effective from 0.35-2.5u, by M. J. Minot, pp. 515-519.

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