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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 41: Organic Electronics and Photovoltaics IV: OPV (joint session CPP/DS/HL, organized by CPP)

CPP 41.8: Vortrag

Mittwoch, 22. März 2017, 17:15–17:30, ZEU 260

Manipulating the morphology in printed organic solar cells — •Stephan Pröller¹, Daniel Moseguí Gonzáles², Chenhui Zhu³, Alexander Hexemer³, Peter Müller-Buschbaum², and Eva M. Herzig¹ — ¹TU München, Munich School of Engineering, Herzig Group, 85748 Garching, Germany — ²TU München, Physik-Department, LS Funktionelle Materialien, 85748 Garching, Germany — ³Lawrence Berkeley National Laboratory, Advanced Light Source, Berkeley, USA

The nanomorphology can strongly influence the physical properties of organic thin films. For example, polymer:fullerene blends used in organic photovoltaics vary significantly in performance depending on the inner film morphology. To allow large-scale production of these devices, control of the nanostructure during the processing of the active layer is important. This firstly needs an understanding of the processes involved during the drying of the film. Using an industrial slot-die coater implemented into a synchrotron beamline we have successfully characterized the solidification process of an active layer using grazing incidence small and wide angle X-ray scattering (GISAXS/GIWAXS). We use the gained knowledge to further manipulate the structure of printed organic thin films by external intervention while printing. With this manipulation, we are able to positively influence the morphological evolution and thus the performance of the produced devices.