Dresden 2017 – wissenschaftliches Programm
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.