Dresden 2017 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 88: Organic Electronics and Photovoltaics V: OPV

HL 88.9: Vortrag

Freitag, 24. März 2017, 12:45–13:00, ZEU 255

Following the Formation of Metal Electrodes for Organic Photovoltaics — •Franziska Löhrer¹, Volker Körstgens¹, Matthias Schwartzkopf², Alexander Hinz³, Oleksandr Polonskyi³, Thomas Strunskus³, Franz Faupel³, Stephan Roth^2,4, and Peter Müller-Buschbaum¹ — ¹TU München, Physik-Department, D-85748 Garching — ²Deutsches Elektronensynchrotron DESY, D-22607 Hamburg — ³CAU zu Kiel, Institut für Materialwissenschaft, D-24143 Kiel — ⁴KTH, Teknikringen 56-58, SE-100 44 Stockholm

With their easy processability, high flexibility and tunable optical properties, organic photovoltaics offer a wide range of potential applications. Although based on organic materials, photovoltaic devices typically contain metal contacts due to their unrivaled electronic conductivity. These contacts have a major influence on the solar cell performance. Our work focuses on the nanostructure evolution of metal-polymer interfaces inherent in organic solar cells. We follow the morphological changes during the sputter deposition of metal electrodes onto photoactive layers using in-situ GISAXS and GIWAXS. This technique allows us to investigate the deposition process with a high spatial as well as temporal resolution. Comparing the deposition behavior of typical electrode materials (such as Au or Al) on thin films of photoactive organic materials (e.g. PTB7) helps to understand their influence on the respective photovoltaic performance.