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18.9 %-Efficient Screen-Printed Solar Cells Applying a Print-on-Print Process
H. Hannebauer, T. Falcon, R. Hesse, T. Dullweber, R. Brendel
Screen Printing, Shading, 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.3.3
1607 - 1610
ISBN: 3-936338-27-2
Paper DOI: 10.4229/26thEUPVSEC2011-2BV.3.3
0,00 EUR
Document(s): paper


We investigate different process conditions of the print-on-print Ag front side metallization such as Ag pastes and screen aperture. The print-on-print process reduces the Ag finger width down to 70 m. The application of the optimized print-on-print process to industrial type large area screen-printed solar cells displays conversion efficiencies up to 18.9 % compared to 18.5 % efficiency with standard single printed 107 m wide Ag fingers. The efficiency improvement is caused by an improved short circuit current of up to 37.4 mA/cm2 which is explained by the reduced shadowing loss. However, we find a strong dependence of the solar cell parameters on the print-on-print process conditions.