Dual electrically insulated solar cells

Batteries: thermoelectric and photoelectric – Thermoelectric – Radiation pyrometer

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136 89SJ, 148174, 357 30, 357 59, H01L 3106

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active

040947041

ABSTRACT:
Composite solar cells of improved efficiency comprise two cells of different characteristics arranged in optical series but electrically insulated from each other. Preferably, each cell is of larger crystal grain size than its substrate, which grain size is achieved by growing the cell semi-conductor on a molten intermediate rheotaxy layer of a suitable semi-conductor which solidifies at a temperature below the melting temperature of the solar cell semi-conductor. The substrate and the intermediate rheotaxy layer of the overlying cell are transparent to that fraction of sunlight which is utilized by the underlying cell. Various configurations of overlying and underlying cells are disclosed.

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patent: 4053326 (1977-10-01), Forrht
patent: 4058418 (1977-11-01), Lindmayer
patent: 4064522 (1977-12-01), Shaw et al.
A. G. Milnes, et al., "Rheotaxy for Large Grain Thin Film Solar Cell Fabrication", Conf. Record, 12th IEEE Photovoltaic Specialist's Conference, Nov. 15-18, 1976, pp. 997-999.
P. Vohl, et al., "GaAs Thin-Film Solar Cells", IEEE Trans. Electron Devices, vol. Ed.-14, pp. 26-30, (1967).
H. J. Hovel, et al., "Minority Carrier Confinement Thin Film Solar Cell", IBM Tech. Disc. Bull., vol. 18, pp. 544-545, (1975).
J. J. Cusomo, et al., "Fabrication of Large Grain Columnar Polycrystalline Thin Films", IBM Tech. Disc. Bull., vol. 18, pp. 3063-3064, (1976).

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