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Defects and device performance
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Yoo, K. C. Regnault, W. Lin, H. C. Armstrong, R. Storti, G. Johnson, S. |
| Copyright Year | 1985 |
| Description | The necessity for a low-cost crystalline silicon sheet material for photovoltaics has generated a number of alternative crystal growth techniques that would replace Czochralski (Cz) and float-zone (FZ) technologies. Efficiencies of devices fabricated from low resistivity FZ silicon are approaching 20%, and it is highly likely that this value will be superseded in the near future. However, FZ silicon is expensive, and is unlikely ever to be used for photovoltaics. Cz silicon has many of the desirable qualities of FZ except that minority-carrier lifetimes at lower resistivities are significantly less than those of FZ silicon. Even with Cz silicon, it is unlikely that cost goals can be met because of the poor-material yield that results from sawing and other aspects of the crystal rowth. Although other silicon sheet technologies have been investigated, almost all have characteristics that limit efficiency to approx. 16%. In summary, 20% efficient solar cells can likely be fabricated from both FZ and Cz silicon, but costs are likely to be ultimately unacceptable. Alternate silicon technologies are not likely to achieve this goal, but cost per watt figures may be eventually better than either of the single crystal technologies and may rival any thin-film technology. |
| File Size | 402874 |
| Page Count | 12 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19860010267 |
| Archival Resource Key | ark:/13960/t45q9t14d |
| Language | English |
| Publisher Date | 1985-08-15 |
| Access Restriction | Open |
| Subject Keyword | Solid-state Physics Thin Films Crystal Growth Single Crystals Photovoltaic Cells Cost Effectiveness Electrical Resistivity Efficiency Carrier Lifetime Float Zones Czochralski Method Minority Carriers Silicon Films Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
