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Silicon sheet growth development for the large area sheet task of the low cost solar array project. heat exchanger method - ingot casting fixed abrasive method - multi-wire slicing
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Schmid, F. Khattak, C. P. |
| Copyright Year | 1978 |
| Description | Solar cells fabricated from HEM cast silicon yielded up to 15% conversion efficiencies. This was achieved in spite of using unpurified graphite parts in the HEM furnace and without optimization of material or cell processing parameters. Molybdenum retainers prevented SiC formation and reduced carbon content by 50%. The oxygen content of vacuum cast HEM silicon is lower than typical Czochralski grown silicon. Impregnation of 45 micrometers diamonds into 7.5 micrometers copper sheath showed distortion of the copper layer. However, 12.5 micrometers and 15 micrometers copper sheath can be impregnated with 45 micrometers diamonds to a high concentration. Electroless nickel plating of wires impregnated only in the cutting edge showed nickel concentration around the diamonds. This has the possibility of reducing kerf. The high speed slicer fabricated can achieve higher speed and longer stroke with vibration isolation. |
| File Size | 8649857 |
| Page Count | 63 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19790006369 |
| Archival Resource Key | ark:/13960/t4gn30s3p |
| Language | English |
| Publisher Date | 1978-10-15 |
| Access Restriction | Open |
| Subject Keyword | Energy Production And Conversion Solar Cells Crystal Growth Solar Arrays Efficiency Energy Conversion Silicon Manufacturing Heat Exchangers Castings Copper Molybdenum 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 |
