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Molybdenum-tin as a solar cell metallization systemThe operations of solar cell manufacture are briefly examined. The formation of reliable, ohmic, low-loss, and low-cost metal contacts on solar cells is a critical process step in cell manufacturing. In a commonly used process, low-cost metallization is achieved by screen printing a metal powder-glass frit ink on the surface of the Si surface and the conductive metal powder. A technique utilizing a molybdenum-tin alloy for the metal contacts appears to lower the cost of materials and to reduce process complexity. The ink used in this system is formulated from MoO3 with Sn powder and a trace amount of titanium resonate. Resistive losses of the resulting contacts are low because the ink contains no frit. The MoO3 is finally melted and reduced in forming gas (N2+H2) to Mo metal. The resulting Mo is highly reactive which facilitates the Mo-Si bonding.
Document ID
19810059931
Document Type
Conference Proceedings
Authors
Boyd, D. W. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Radics, C. (California Institute of Technology, Jet Propulsion Laboratory, Pasadena CA, United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1981
Subject Category
ENERGY PRODUCTION AND CONVERSION
Meeting Information
National Symposium and Exhibition Material and process applications - Land, sea, air, space(Los Angeles, CA)
Distribution Limits
Public
Copyright
Other