Double heterojunction solar cells

Details Double heterojunction solar cells Double heterojunction solar cells

1978-09-26

1980-03-04

Weisstuch, Aaron

Batteries: thermoelectric and photoelectric

Thermoelectric

Radiation pyrometer

136 89PC, 136 89GA, 357 16, 357 30, 357 81, H01L 3106

Patent

active

041915933

ABSTRACT:
Photovoltaic cell comprising two heterojunctions between three component semiconductors Ga.sub.1-x AL.sub.x As with x varying from 0 to 0.9, GaAs, and Ge which have respective bandgaps of 0.66, 1.43 and 2.4 eV, lattice constants matching at 0.07% and expansion coefficients matching at 1.7%. The cell is mounted in a cell device comprising a parallelepipedal unit, a Fresnel lens, a tapering cavity within said unit, partially filled up with a lens shaped antireflecting transparent material and a radiator, said device forming a sunlight concentrator.

REFERENCES:
patent: 2640901 (1953-06-01), Kinman
patent: 3229682 (1966-01-01), Perlmutter et al.
patent: 3780722 (1973-12-01), Swet
patent: 4069812 (1978-01-01), O'Neill
patent: 4128733 (1978-12-01), Fraas et al

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