Double heterojunction solar cells
Patent
·
OSTI ID:5749741
A photovoltaic cell is disclosed comprising two heterojunctions between three component semiconductors Ga/sub 1-x/ Al/sub x/ as with X varying from 0 to 9, GaAs, and Ge which have respective bandgaps of 0.66, 1. 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.
- Assignee:
- Centre National D'etudes Spatiales (France)
- Patent Number(s):
- US 4191593
- OSTI ID:
- 5749741
- Resource Relation:
- Patent Priority Date: Priority date 27 Sep 1977, France; Other Information: PAT-APPL-946084
- Country of Publication:
- United States
- Language:
- English
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