Batteries: thermoelectric and photoelectric – Photoelectric – Panel or array
Patent
1994-06-29
1995-11-14
Weisstuch, Aaron
Batteries: thermoelectric and photoelectric
Photoelectric
Panel or array
136250, 136251, 437 2, 437212, 437216, H01L 31048, H01L 31052, H01L 310384, H01L 3118
Patent
active
054663016
ABSTRACT:
A flexible cover (14) for a flexible solar cell (12) protects the cell from the ambient and increases the cell's efficiency. The cell (12)includes silicon particles (16) held in a flexible aluminum sheet matrix (20,22). The cover (14) is a flexible, protective layer (60) of a light-transparent material such as a fluoropolymer, preferably TEFZEL.RTM. film having a relatively flat upper, free surface (64) and an opposed surface (66) coated with an adhesive, preferably EVA. The surface (66) is applied to the particles (16) so as to include first portions (68) which conform to the poles (31 P) and the polar regions (31R) of the particles (16) and second, projecting convex (72) or concave (90) prism-like portions which define spaces (78) in conjunction with the reflective surface (20T) of one aluminum sheet (20). Without the cover (14), light (50) falling on the surface (20T) between the particles (16) is wasted, that is, it does not fall on a particle (16). The surfaces of the second portions (72,90) are non-parallel to the direction of the otherwise wasted light (50), which, together with a selected relationship between the refractive indices of the cover 14 and the spaces (78), results in sufficient diffraction of the otherwise wasted light (50) so that about 25% of it is reflected from the surface (20T) onto a particle (16).
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Hammerbacher Milfred D.
Schmit Russell R.
Donaldson Richard L.
Kesterson James C.
Klinger Robert C.
Texas Instruments Incorporated
Weisstuch Aaron
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