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)
- 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 I) and the pyrolysis of silane to semiconductor-grade silicon (Step II). Quarterly progress report, October--December 1977. [Silicon tetrachlorides]
Establishment of the feasibility of a process capable of low cost, high volume production of silane (Phase I), and the pyrolysis of silane to semiconductor-grade silicon (Phase II). Low Cost Silicon Solar Array Project, Task I. Quarterly progress report, April--June 1977
Related Subjects
140501* -- Solar Energy Conversion-- Photovoltaic Conversion
36 MATERIALS SCIENCE
360601 -- Other Materials-- Preparation & Manufacture
CHEMICAL REACTIONS
CHEMICAL REACTORS
DECOMPOSITION
DIRECT ENERGY CONVERTERS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
FLUIDIZED BED
HYDRIDES
HYDROGEN COMPOUNDS
IMPURITIES
PELLETS
PHOTOELECTRIC CELLS
PHOTOVOLTAIC CELLS
PHOTOVOLTAIC POWER PLANTS
PHYSICAL PROPERTIES
POWER PLANTS
PRODUCTION
PYROLYSIS
SEMIMETALS
SILANES
SILICON
SILICON COMPOUNDS
SILICON SOLAR CELLS
SOLAR CELL ARRAYS
SOLAR CELLS
SOLAR POWER PLANTS
THERMOCHEMICAL PROCESSES