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Title:
Evaluation of ink-jet printed current collecting grids and busbars for ITO-free organic solar cells
 
Author(s):
Galagan, Y.; Coenen, E.W.C.; Sabik, S.; Gorter, H.; Barink, M.; Veenstra, S.C.; Kroon, J.M.; Andriessen, R.; Blom, P.
 
Published by: Publication date:
ECN Solar Energy 24-4-2012
 
ECN report number: Document type:
ECN-W--12-011 Article (scientific)
 
Number of pages:
7  

Published in: Solar Energy Materials & Solar Cells (Elsevier), , 2012, Vol.104, p.32-38.

Abstract:
ITO-free organic solar cells with ink-jet printed current collecting grids and high conducting PEDOT:PSS as a composite anode are demonstrated. Inkjet printed current collecting grids with different cross- sectional areas have been investigated. The effect of the width and height of the grid lines and busbars has been measured and modeled by direct current (DC) simulations. The electrical potential in devices with different grid pro?les have been calculated and reveal critical bottlenecks in the grid electrode geometry, as the ability of the busbar to collect all the current. Experimentally, the upper limit of the conductivity of the ink-jet printed current collecting grids is limited by the topology of the grids and shadow losses in the solar cells.

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