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Proceedings Paper

Spatial mapping of photocurrents in organic solar cells comprising wedge-shaped absorber layers for an efficient material screening
Author(s): Felix Nickel; Christian Sprau; Michael F. G. Klein; Jan Mescher; Uli Lemmer; Alexander Colsmann
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Paper Abstract

We demonstrate a new organic solar cell fabrication and characterization technique that allows for a quick screening of new materials and material combinations (i.e. blends) as active layers for solution processed organic solar cells with respect to the optimization of the active layer thicknesses, thereby saving precious material resources. Therefore we bar coat wedge-shaped layers by “horizontal dipping”. The photocurrent under short circuit conditions, the external quantum efficiency and the absorption of those wedge-shaped layers were then recorded spatially resolved. From the results the device photocurrent vs. the layer thickness can be extracted allowing for conclusions about the optimum absorber layer thickness.

Paper Details

Date Published: 13 September 2012
PDF: 5 pages
Proc. SPIE 8477, Organic Photovoltaics XIII, 84770E (13 September 2012); doi: 10.1117/12.930123
Show Author Affiliations
Felix Nickel, Karlsruhe Institute of Technology (Germany)
Christian Sprau, Karlsruhe Institute of Technology (Germany)
Michael F. G. Klein, Karlsruhe Institute of Technology (Germany)
Jan Mescher, Karlsruhe Institute of Technology (Germany)
Uli Lemmer, Karlsruhe Institute of Technology (Germany)
Alexander Colsmann, Karlsruhe Institute of Technology (Germany)

Published in SPIE Proceedings Vol. 8477:
Organic Photovoltaics XIII
Zakya H. Kafafi; Christoph J. Brabec; Paul A. Lane, Editor(s)

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