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Ultra Fine Line Frontside Metalisation on Crystalline Silicon Solar Cells by Screen & Stencil Printing
T. Falcon
Screen Printing, Solar Cell-Efficiency, Aspect Ratio, Metallization, Metallisation
Wafer-based Silicon Solar Cells and Materials Technology
Subtopic: Silicon Solar Cell Improvements
Event: 26th European Photovoltaic Solar Energy Conference and Exhibition
Session: 2BV.3.31
1686 - 1690
ISBN: 3-936338-27-2
Paper DOI: 10.4229/26thEUPVSEC2011-2BV.3.31
0,00 EUR
Document(s): paper


Among the drivers for the continuing narrowing of frontside conductors is the trend toward higher emitter sheet resistances. This trend, already emerging in mainstream cell production, is even more prevalent with the growing introduction of selective emitter technologies. High Rsheet emitters make better use of the blue end of the light spectrum, thereby enhancing cell efficiency. However, this benefit comes with the downside that the higher Rsheet emitter impedes the flow of electrons and therefore current collection. Using a greater number of finer conductors with reduced conductor spacing can mitigate these resistance losses with no additional shadowing loss, thereby acting as an enabler for high Rsheet emitter technologies. With 70μm wide screen printed conductors already in high volume production, the sub 50μm printed line becomes the next logical milestone in the continuing miniaturisation of frontside conductor geometries. This paper will describe the path to that milestone by evaluating ultra-fine wire mesh screens and thin metal stencils.