Batteries: thermoelectric and photoelectric – Photoelectric – Panel or array
Patent
1992-02-24
1993-09-28
Weisstuch, Aaron
Batteries: thermoelectric and photoelectric
Photoelectric
Panel or array
136249, 136262, 136293, H01L 3105
Patent
active
052483460
ABSTRACT:
A photovoltaic cell (20) with a single pn-junction (46) is disclosed that is capable of functioning as both a current source and a bypass diode. The photovoltaic cell is made of material that has a low bandgap energy, 1.0 eV, or less. One version of the photovoltaic cell is formed of a GaSb wafer doped with Te to form an n-region (22); the Te concentration is between 3 and 15.times.10.sup.17 atoms/cm.sup.3. Multiple photovoltaic cells of this invention can be connected in series and placed in parallel across a like number of photovoltaic cells (76) that do not function as tunnel diodes in order to form a power-generating array (70). The photovoltaic cells are arranged in tandem pairs so that the photovoltaic cells (76), which are transparent to the light absorbed by the photovoltaic cells (20), overlie the photovoltaic cells (20). In the event one of the photovoltaic cell pairs (20, 76) is rendered inactive, current will flow through the inactive photovoltaic cell (20) to minimize the drop in output current from the array.
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Avery James E.
Fraas Louis M.
The Boeing Company
Weisstuch Aaron
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