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Silicon web process development. Low Cost Solar Array Project, Large Area Silicon Sheet Task. Quarterly report, October 1, 1978-December 31, 1978

Technical Report ·
OSTI ID:5598876
; ; ; ; ; ;
Silicon dendritic web is a ribbon form of single crystal silicon produced directly from the melt without the use of dies or shapers. Solar cells fabricated on web have exhibited conversion efficiencies of 15.5% - the highest yet for a ribbon form of silicon. The primary objectives of this program are to develop techniques to grow silicon web at 25 cm/sup 2//min output rate and demonstrate the feasibility of web growth with simultaneous melt replenishment. The methods developed are to be compatible with efficient solar cell performance. During this quarter the focal points of the effort have been: (1) tests of aftertrimmers to improve web width; (2) evaluation of growth lid designs to raise speed and output rate; (3) tests of melt replenishment hardware; and (4) investigation of directed gas flow systems to control unwanted oxide deposition in the system and to improve convective cooling of the web. Technical progress is reported in detail. (WHK)
Research Organization:
Westinghouse Research and Development Center, Pittsburgh, PA (USA)
DOE Contract Number:
NAS-7-100-954654
OSTI ID:
5598876
Report Number(s):
DOE/JPL/954654-6
Country of Publication:
United States
Language:
English

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Related Subjects

14 SOLAR ENERGY
140501* -- Solar Energy Conversion-- Photovoltaic Conversion
36 MATERIALS SCIENCE
360601 -- Other Materials-- Preparation & Manufacture
COMPUTERIZED SIMULATION
CRUCIBLES
CRYSTAL GROWTH
CRYSTAL GROWTH METHODS
CRYSTAL STRUCTURE
CRYSTALS
DENDRITIC WEB GROWTH METHOD
DESIGN
DIRECT ENERGY CONVERTERS
EFFICIENCY
ELEMENTS
EQUIPMENT
ETCHING
FABRICATION
FEASIBILITY STUDIES
HEATERS
MICROSTRUCTURE
MONOCRYSTALS
PHOTOELECTRIC CELLS
PHOTOVOLTAIC CELLS
RESEARCH PROGRAMS
SEMIMETALS
SILICON
SILICON SOLAR CELLS
SIMULATION
SOLAR CELLS
SURFACE FINISHING
TRAPS