Process Research of Polycrystalline Silicon Material (PROPSM). Quarterly report No. 1, November 8-December 31, 1983
Recent reported results of hydrogen-passivated polycrystalline silicon solar cells are summarized. Most of the studies have been performed on very small grain or short minority-carrier diffusion length silicon. Hydrogenated solar cells fabricated from this material appear to have effective minority-carrier diffusion lengths that are still not very long, as shown by the open-circuit voltages of passivated cells that are still significantly less than those of single-crystal solar cells. The short-circuit current of solar cells fabricated from large-grain cast polycrystalline silicon is nearly equivalent to that of single-crystal cells, which indicates long bulk minority-carrier diffusion length. However, the open-circuit voltage, which is sensitive to grain boundary recombination, is 20 to 40 mV less. The goal of this program is to minimize the variations in open-circuit voltage and fill-factor that are caused by structural defects by passivating these defects using a hydrogenation process.
- Research Organization:
- Solarex Corp., Rockville, MD (USA)
- DOE Contract Number:
- NAS-7-100-956698
- OSTI ID:
- 5192174
- Report Number(s):
- DOE/JPL/956698-84/1; ON: DE84009314
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
140501* -- Solar Energy Conversion-- Photovoltaic Conversion
36 MATERIALS SCIENCE
360600 -- Other Materials
CRYSTALS
DIFFUSION LENGTH
DIMENSIONS
DIRECT ENERGY CONVERTERS
ELECTRIC POTENTIAL
ELEMENTS
EQUIPMENT
HYDROGEN
LENGTH
NONMETALS
PASSIVATION
PERFORMANCE
PHOTOELECTRIC CELLS
PHOTOVOLTAIC CELLS
POLYCRYSTALS
SILICON SOLAR CELLS
SOLAR CELLS
SOLAR EQUIPMENT