IUE observations of variable type I Seyfert galaxies. Semi-annual report, 1 July-31 December 1984
Results of hydrogen-passivated, polycrystalline silicon solar cells research are summarized. Most of the studies were 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 aim was 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:
- California Inst. of Tech., Pasadena (USA)
- OSTI ID:
- 6133499
- Report Number(s):
- N-84-31781
- Country of Publication:
- United States
- Language:
- English
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