NDLI: Large area silicon sheet by efg (Document No: 19820012790)

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Large area silicon sheet by efg (Document No: 19820012790)

Content Provider	NASA Technical Reports Server (NTRS)
Copyright Year	1981
Description	Progress was made in improving ribbon flatness and reducing stress, and in raising cell performance for 10 cm wide ribbon grown in single cartridge EFG furnaces. Optimization of growth conditions resulted in improved ribbon thickness uniformity at a thickness of 200 micron, grown at 4 cm/minute, and growth at this target speed is routinely achieved over periods of the order of one hour or more. With the improved ribbon flatness, fabrication of large area (50 cm2) cells is now possible, and 10 to 11% efficiencies were demonstrated on ribbon grown at 3.5 to 4 cm/minute. Factors limiting performance of the existing multiple ribbon furnace were identified, and growth system improvements implemented to help raise throughput rates and the time percentage of simultaneous three-ribbon growth. However, it is evident that major redesign of this furnace would be needed to overcome shortfalls in its ability to achieve the Technical Features Demonstration goals of 1980. It was decided to start construction of a new multiple ribbon furnace and to incorporate the desired improvements into its design. The construction of this furnace is completed.
File Size	4200394
Page Count	72
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19820012790
Archival Resource Key	ark:/13960/t9g49ht3t
Language	English
Publisher Date	1981-09-30
Access Restriction	Open
Subject Keyword	Energy Production And Conversion Solar Cells Crystal Growth Thickness Ribbons Solar Arrays Furnaces Silicon Electric Fields Photovoltaic Conversion Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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