Spatial mapping of photocurrents in organic solar cells comprising wedge-shaped absorber layers for an efficient material screening

Felix Nickel; Christian Sprau; Michael F. G. Klein; Jan Mescher; Uli Lemmer; Alexander Colsmann

doi:10.1117/12.930123

13 September 2012 Spatial mapping of photocurrents in organic solar cells comprising wedge-shaped absorber layers for an efficient material screening

Felix Nickel, Christian Sprau, Michael F. G. Klein, Jan Mescher, Uli Lemmer, Alexander Colsmann

Author Affiliations +

Proceedings Volume 8477, Organic Photovoltaics XIII; 84770E (2012) https://doi.org/10.1117/12.930123
Event: SPIE Organic Photonics + Electronics, 2012, San Diego, California, United States

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.

Citation Download Citation

Felix Nickel, Christian Sprau, Michael F. G. Klein, Jan Mescher, Uli Lemmer, and Alexander Colsmann "Spatial mapping of photocurrents in organic solar cells comprising wedge-shaped absorber layers for an efficient material screening", Proc. SPIE 8477, Organic Photovoltaics XIII, 84770E (13 September 2012); https://doi.org/10.1117/12.930123

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