Low cost silicon solar array project silicon materials task: establishment of the feasibility of a process capable of low-cost, high volume production of silane (step 1) and the pyrolysis of silane to semiconductor-grade silicon (step 2). Quarterly progress report, Oct--Dec 1977
A quartz fluid bed reactor capable of operating at temperatures of up to 1000 C was designed, constructed, and successfully operated. During a 30 minute experiment, silane was decomposed within the reactor with no pyrolysis occurring on the reactor wall or on the gas injection system. A hammer mill/roller-crusher system appeared to be the most practical method for producing seed material from bulk silicon. No measurable impurities were detected in the silicon powder produced by the free space reactor, using the cathode layer emission spectroscopic technique. Impurity concentration followed by emission spectroscopic examination of the residue indicated a total impurity level of 2 micrograms/gram. A pellet cast from this powder had an electrical resistivity of 35 to 45 ohm-cm and P-type conductivity.
- Research Organization:
- Union Carbide Corp., New York (USA)
- DOE Contract Number:
- NAS7-100; JPL-954334
- OSTI ID:
- 6498185
- Report Number(s):
- N-78-24624; NASA-CR-157101; QPR-9
- Country of Publication:
- United States
- Language:
- English
Similar Records
Low cost silicon solar array project silicon materials task: establishment of the feasibility of a process capable of low-cost, high volume production of silane (step 1) and the pyrolysis of silane to semiconductor-grade silicon (step 2). Quarterly progress report, Jul--Sep 1977
Low cost silicon solar array project, silicon materials task. Establishment of the feasibility of a process capable of low-cost, high-volume production of silane (Step I) and the pyrolysis of silane to semiconductor-grade silicon (Step II). Quarterly progress report, October--December 1977. [Silicon tetrachlorides]
Related Subjects
36 MATERIALS SCIENCE
SILANES
PRODUCTION
SILICON
CHEMICAL REACTORS
ELECTRIC CONDUCTIVITY
FLUIDIZED BED
IMPURITIES
PELLETS
PYROLYSIS
SILICON SOLAR CELLS
SOLAR CELL ARRAYS
CHEMICAL REACTIONS
DECOMPOSITION
DIRECT ENERGY CONVERTERS
ELECTRICAL PROPERTIES
ELEMENTS
HYDRIDES
HYDROGEN COMPOUNDS
PHOTOELECTRIC CELLS
PHOTOVOLTAIC CELLS
PHOTOVOLTAIC POWER PLANTS
PHYSICAL PROPERTIES
POWER PLANTS
SEMIMETALS
SILICON COMPOUNDS
SOLAR CELLS
SOLAR POWER PLANTS
THERMOCHEMICAL PROCESSES
140501* - Solar Energy Conversion- Photovoltaic Conversion
360601 - Other Materials- Preparation & Manufacture