Process for utilizing low-cost graphite substrates for polycrystalline solar cells
Patent
·
OSTI ID:6791274
Low-cost polycrystalline silicon solar cells supported on substrates are prepared by depositing successive layers of polycrystalline silicon containing appropriate dopants over substrates. Metallurgical-grade polycrystalline silicon, graphite and steel coated with a diffusion barrier of silica, borosilicate, phosphosilicate, or mixtures such that p-n junction devices are formed. These cells effectively convert solar energy to electrical energy. To improve the conversion efficiency of the polycrystalline silicon solar cells, the crystallite size in the silicon is increased by melting and solidifying a base layer of polycrystalline silicon before depositing the layers which form the p-n junction.
- Assignee:
- National Aeronautics and Space Administration
- Patent Number(s):
- US 4077818
- OSTI ID:
- 6791274
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
14 SOLAR ENERGY
140501* -- Solar Energy Conversion-- Photovoltaic Conversion
ALLOYS
BONDING
CARBIDES
CARBON
CARBON COMPOUNDS
COST
CRYSTALS
DIRECT ENERGY CONVERTERS
DOPED MATERIALS
EFFICIENCY
ELEMENTS
FABRICATION
GRAPHITE
IRON ALLOYS
IRON BASE ALLOYS
JOINING
JUNCTIONS
NONMETALS
P-N JUNCTIONS
PHOTOELECTRIC CELLS
PHOTOVOLTAIC CELLS
POLYCRYSTALS
SEMICONDUCTOR JUNCTIONS
SEMIMETALS
SILICON
SILICON CARBIDES
SILICON COMPOUNDS
SILICON SOLAR CELLS
SOLAR CELLS
STEELS
140501* -- Solar Energy Conversion-- Photovoltaic Conversion
ALLOYS
BONDING
CARBIDES
CARBON
CARBON COMPOUNDS
COST
CRYSTALS
DIRECT ENERGY CONVERTERS
DOPED MATERIALS
EFFICIENCY
ELEMENTS
FABRICATION
GRAPHITE
IRON ALLOYS
IRON BASE ALLOYS
JOINING
JUNCTIONS
NONMETALS
P-N JUNCTIONS
PHOTOELECTRIC CELLS
PHOTOVOLTAIC CELLS
POLYCRYSTALS
SEMICONDUCTOR JUNCTIONS
SEMIMETALS
SILICON
SILICON CARBIDES
SILICON COMPOUNDS
SILICON SOLAR CELLS
SOLAR CELLS
STEELS