Batteries: thermoelectric and photoelectric – Thermoelectric – Radiation pyrometer
Patent
1976-02-09
1978-04-04
Weisstuch, Aaron
Batteries: thermoelectric and photoelectric
Thermoelectric
Radiation pyrometer
29572, 136 89CC, 136 89PC, 357 30, 357 88, 357 90, 148188, H01L 3106
Patent
active
040825701
ABSTRACT:
A photovoltaic energy converter for converting incident radiant energy, such as solar energy, to electrical energy. The converter comprises a cell formed from a plurality of integrally interconnected p-n junction-containing semiconductor wafers. The wafers are stacked end-to-end in the cell so that the respective junctions in each wafer are parallel to each other. The efficiency and performance of the cell is improved, particularly upon exposure to concentrated sunlight, by imposing various conditions on the cell fabrication and design. Improvements result, for example, by selecting a high resistivity semiconductor as the starting material in the fabrication of the cell, controlling the diffusion process to optimize the junction gradient and minimize the thickness of the base region in each wafer, orienting the wafers in the cell so that they are illuminated at a small angle relative to the plane of the respective junctions therein, and treating the exposed surfaces of the wafer to reduce reflectivity and surface recombination velocities.
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House Robert E.
Irvin Robert A.
Kane Daniel F.
Semicon, Inc.
Weisstuch Aaron
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