Thin film polycrystalline silicon solar cells: first technical progress report, April 15, 1980-July 15, 1980
The objectives of this contract are to fabricate large area thin film silicon solar cells with AM1 efficiency of 10% or greater with good reproducibility and good yield and to assess the feasibility of implementing this process for manufacturing solar cells at a cost of $300/kWe. Efforts during the past quarter have been directed to the purification of metallurgical silicon, the preparation of substrates, and the fabrication and characterization of solar cells. The partial purification of metallurgical silicon by extraction with aqua regia has been investigated in detail, and the resulting silicon was analyzed by the atomic absorption technique. The unidirectional solidification of aqua regia-extracted metallurgical silicon on graphite was used for the preparation of substrates, and the impurity distribution in the substrate was also determined. Large area (> 30 cm/sup 2/) solar cells have been prepared from aqua regia-extracted metallurgical silicon substrates by the thermal reduction of trichlorosilane containing appropriate dopants. Chemically deposited tin-dioxide films were used as antireflection coatings. Solar cells with AM1 efficiencies of about 8.5% have been obtained. Their spectral response, minority carrier diffusion length, and I/sub sc/-V/sub oc/ relation have been measured.
- Research Organization:
- Poly Solar, Inc., Garland, TX (USA)
- DOE Contract Number:
- AC02-77CH00178
- OSTI ID:
- 5167385
- Report Number(s):
- SERI/PR-9192-1-T1
- Country of Publication:
- United States
- Language:
- English
Similar Records
Low cost thin film polycrystalline silicon solar cells. Final report, March 15, 1979-July 31, 1980
Thin films of silicon on metallurgical silicon substrates: Phase II. Quarterly project report No. 2, December 1, 1977--28 February 1978
Related Subjects
140501* -- Solar Energy Conversion-- Photovoltaic Conversion
36 MATERIALS SCIENCE
360601 -- Other Materials-- Preparation & Manufacture
ANTIREFLECTION COATINGS
AQUA REGIA
CHALCOGENIDES
CHEMICAL COATING
CHEMICAL VAPOR DEPOSITION
COATINGS
CRYSTALS
DEPOSITION
DIFFUSION LENGTH
DIRECT ENERGY CONVERTERS
EFFICIENCY
ELECTRICAL PROPERTIES
ELEMENTS
EQUIPMENT
FABRICATION
FILMS
HYDRIDES
HYDROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE
PHOTOELECTRIC CELLS
PHOTOVOLTAIC CELLS
PHYSICAL PROPERTIES
POLYCRYSTALS
PURIFICATION
SEMIMETALS
SILANES
SILICON
SILICON COMPOUNDS
SILICON SOLAR CELLS
SOLAR CELLS
SOLAR EQUIPMENT
SPECTRAL RESPONSE
SUBSTRATES
SURFACE COATING
TIN COMPOUNDS
TIN OXIDES