Computer modeling of dendritic web growth processes and characterization of the materialHigh area throughput rate will be required for the economical production of silicon dendritic web for solar cells. Web width depends largely on the temperature distribution on the melt surface while growth speed is controlled by the dissipation of the latent heat of fusion. Thermal models were developed to investigate each of these aspects, and were used to engineer the design of laboratory equipment capable of producing crystals over 4 cm wide; growth speeds up to 10 cm/min were achieved. The web crystals were characterized by resistivity, lifetime and etch pit density data as well as by detailed solar cell I-V data. Solar cells ranged in efficiency from about 10 to 14.5% (AM-1) depending on growth conditions. Cells with lower efficiency displayed lowered bulk lifetime believed to be due to surface contamination.
Document ID
19790056927
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Seidensticker, R. G. (Westinghouse Electric Corp. Pittsburgh, PA, United States)
Kothmann, R. E. (Westinghouse Electric Corp. Pittsburgh, PA, United States)
Mchugh, J. P. (Westinghouse Electric Corp. Pittsburgh, PA, United States)
Duncan, C. S. (Westinghouse Electric Corp. Pittsburgh, PA, United States)
Hopkins, R. H. (Westinghouse Electric Corp. Pittsburgh, PA, United States)
Blais, P. D. (Westinghouse Electric Corp. Pittsburgh, PA, United States)
Davis, J. R. (Westinghouse Electric Corp. Pittsburgh, PA, United States)
Rohatgi, A. (Westinghouse Electric Corp. Pittsburgh, Pa., United States)