Integrated PV-thermal panel and process for production
A process is described for production of integrated photovoltaic-thermal panels, the preferred process including the following chemical vapor depositions, in air, and the following work stations: (a) copper oxide station, whereby sheet copper, Cu, is cleaned and a layer of copper oxide, CuO, is formed thereon by heating the copper in air or steam, (b) silica station, whereby silicic acid, Si(OH)/sub 4/, and steam, H/sub 2/O, are sprayed on the hot oxidized sheets of copper, and Si(OH)/sub 4/ is reduced by hot carbon atoms to carbon monoxide, CO, which is vented and burned off, and silica, SiO/sub 2/, a layer of which is deposited onto and bonded thermally to the copper oxide layer, (c) silicon station, whereby the silicic acid is further reduced by increased numbers of hot carbon atoms to silicon, Si, a layer of which is deposited on and bonded to the SiO/sub 2/ layer, (d) p-n junction station, whereby boron atoms, then phosphorus atoms, are diffused into the silicon layer, under temperature, timing and number density controls, to establish what is called a p-n junction, (e) crystallization station, whereby heat is applied to the surface of the doped silicon layer, to sinter same and to let silicon atoms form bonds with one another in an orderly and crystalline manner and dominate over unordered, amorphous, bonds of oxide layers below, the results being a crystalline photovoltaic, PV, surface layer bonded to a silica layer and that to CuO and that to Cu, (f) electrode grid station, whereby electrical leadwires are affixed in series and in parallel to the PV surfaces, (g) thermal exchanger station, whereby flat tubes are soldered to the underside of the copper substrate, to carry a heat exchange fluid to and away from the PV layer, to cool the PV layer and to extract thermal heat as well as electrical energy from the integrated PV-thermal panel.
- Assignee:
- NOV; NOV-85-020955; EDB-86-163828
- Patent Number(s):
- US 4607132
- OSTI ID:
- 5258942
- Resource Relation:
- Patent File Date: Filed date 13 Aug 1985
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
PHOTOVOLTAIC POWER SUPPLIES
DESIGN
FABRICATION
BORON
CARBON
CARBON MONOXIDE
CHEMICAL VAPOR DEPOSITION
COPPER OXIDES
CRYSTALLIZATION
ELECTRODES
HEAT EXCHANGERS
HEAT TRANSFER FLUIDS
HEATING
LAYERS
P-N JUNCTIONS
PHOSPHORUS
SILICIC ACID
SILICON
SILICON HYDROXIDES
SILICON OXIDES
SINTERING
STEAM
SUBSTRATES
TEMPERATURE CONTROL
TIME DEPENDENCE
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL COATING
CONTROL
COPPER COMPOUNDS
DEPOSITION
ELECTRONIC EQUIPMENT
ELEMENTS
EQUIPMENT
FLUIDS
HYDROGEN COMPOUNDS
HYDROXIDES
INORGANIC ACIDS
JUNCTIONS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
POWER SUPPLIES
SEMICONDUCTOR JUNCTIONS
SEMIMETALS
SILICON COMPOUNDS
SOLAR EQUIPMENT
SURFACE COATING
TRANSITION ELEMENT COMPOUNDS
140600* - Solar Energy- Photovoltaic Power Systems