ECN publication
Towards industrial application of stencil printing for crystalline silicon solar cells
Published by: Publication date:
ECN Solar Energy 6-9-2010
ECN report number: Document type:
ECN-M--10-020 Conference Paper
Number of pages: Full text:
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Presented at: 25th European Photovoltaic Solar Energy Conference and Exhibition - 5th World Conference on Photovoltaic Energy Conversion, Valencia, Spain, 6-10 september 2010.

A two-step stencil printing concept for front side metallization of crystalline silicon solar cells has been demonstrated in previous work [1] using a stencil to deposit the fingers and a screen for the busbars. In the present work, this concept is further developed and optimized towards industrial application. Line width can be reduced through improved stencil design, lines of 42µm wide and 15µm high after firing have been achieved. Using a rheological test, a paste with appropriate characteristics for stencil printing was identified and resulted in reduction of line width by 10µm. By optimizing the process sequence, paste usage can be reduced by 6% as compared to standard screen printing approach. Finally, to demonstrate the industrial application of the process, a test on 2000 cells in a production environment was successfully conducted and is reported here.

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