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ECN publication
Current collecting grids for ITO-free solar cells
Galagan, Y.; Zimmermann, B.; Coenen, E.W.C.; Jorgensen, M.; Tanenbaum, D.M.; Krebs, F.C.; Gorter, H.; Sabik, S.; Slooff, L.H.; Veenstra, S.C.; Kroon, J.M.; Andriessen, R.
Published by: Publication date:
ECN Solar Energy 11-1-2012
ECN report number: Document type:
ECN-W--11-069 Article (scientific)
Number of pages:

Published in: Advanced Energy Materials (Wiley-VCH), , 2012, Vol.Vol.2, issue 1, p.169-.

Indium-tin-oxide (ITO) free polymer solar cells prepared by ink jet printing a composite front electrode comprising silver grid lines and a semitransparent PEDOT:PSS conductor are demonstrated. The effect of grid line density is explored for a large series of devices and a careful modeling study enabling the identifi cation of the most rational grid structure is presented. Both optical and light beam induced current (LBIC) mapping of the devices are used to support the power loss model and to follow the evolution of the performance over time. Current generation is found to be evenly distributed over the active area initially progressing to a larger graduation in areas with different performance. Over time coating defects also become much more apparent in the LBIC images.

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