Heat-exchanger method, ingot casting. Fixed-abrasive method, multi-wire slicing. Phase II. Silicon-sheet-growth development for the Large-Area Sheet Task of the Low-Cost Solar-Array Project. Final report, November 21, 1977 to November 20, 1978
Ingot casting by the Heat Exchanger Method (HEM) and ingot slicing by the Fixed Abrasive Slicing Technique (FAST) was developed to demonstrate technical feasibility. It has been shown that approximately square crystals can be grown by HEM. The quality of single-crystal regions of the HEM silicon has been demonstrated by solar cells with 15% conversion efficiency. High purity crucibles have been fabricated according to semiconductor standards to help prevent ingot cracking. Theoretical and experimental analyses have established conditions for vacuum processing of silicon. The use of molybdenum retainers and low cost graphite heat conducting pipes is reported. The FAST has been used to slice large workpieces with a high-speed slicer. Electroplated and impregnated blades have been developed. (LEW)
- Research Organization:
- Crystal Systems, Inc., Salem, MA (USA)
- DOE Contract Number:
- NAS-7-100-954373
- OSTI ID:
- 6055624
- Report Number(s):
- DOE/JPL/954373-79/9; ON: DE82004147
- Country of Publication:
- United States
- Language:
- English
Similar Records
Silicon ingot casting: heat exchanger method (HEM). Multi-wire slicing: fixed abrasive slicing technique (FAST). Phase IV. Silicon sheet growth development for the large area sheet task of the low-cost solar array project. Quarterly progress report No. 3, July 1, 1980-September 30, 1980
Silicon ingot casting: Heat Exchanger Method (HEM)/multi-wire slicing: Fixed Abrasive Slicing Technique (FAST), Phase IV. Quarterly progress report No. 2, April 1, 1980-June 30, 1980
Related Subjects
SILICON
CASTING
CUTTING
CRUCIBLES
CUTTING TOOLS
ECONOMIC ANALYSIS
EFFICIENCY
ELECTRIC CONDUCTIVITY
ELECTROPLATING
GRAPHITE
HEAT EXCHANGER METHOD
IMPREGNATION
IMPURITIES
MICROSTRUCTURE
SILICON SOLAR CELLS
TESTING
THERMAL CONDUCTION
CARBON
CRYSTAL GROWTH METHODS
CRYSTAL STRUCTURE
DEPOSITION
DIRECT ENERGY CONVERTERS
ECONOMICS
ELECTRICAL PROPERTIES
ELECTRODEPOSITION
ELECTROLYSIS
ELEMENTS
ENERGY TRANSFER
EQUIPMENT
FABRICATION
HEAT TRANSFER
LYSIS
MACHINING
NONMETALS
PHOTOELECTRIC CELLS
PHOTOVOLTAIC CELLS
PHYSICAL PROPERTIES
PLATING
SEMIMETALS
SOLAR CELLS
SOLAR EQUIPMENT
SURFACE COATING
TOOLS
140501* - Solar Energy Conversion- Photovoltaic Conversion