Silicon solar cells from transition metal doped Czochralski and web crystalsThe influence of metallic impurities on solar cell characteristics has been examined to establish the cost sensitive purity versus performance trade-offs. Solar cells were fabricated on 2 to 4 ohm-cm p-type substrates obtained by Czochralski and dendritic web growth processes. Controlled amounts of metallic impurities were introduced into the melt during growth and included Fe, Cr, Mn, Ni, Cu, Ti, V, Zr, Mg, Zn, and Al. Impurity concentrations in the crystals were determined using emission and mass spectrographic techniques and in some cases by neutron activation analysis. The solar cells were characterized by means of a computer program to curve-fit measured voltage-current data. The principal effect of the added impurities is a degradation of lifetime and diffusion length.
Document ID
19780027013
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Davis, J. R. (Westinghouse Research Labs. Pittsburgh, PA, United States)
Rai-Choudhury, P. (Westinghouse Research Labs. Pittsburgh, PA, United States)
Blais, P. D. (Westinghouse Research Labs. Pittsburgh, PA, United States)
Hopkins, R. H. (Westinghouse Research Laboratories Pittsburgh, Pa., United States)
Mccormick, J. R. (Dow Corning Corp. Hemlock, Mich., United States)