523: Investigations on the stability of polymer/non-fullerene acceptor solar cells

Investigations on the stability of polymer/non-fullerene acceptor solar cells

Gregor Trimmel1, Thomas Rath1, Robert Saf1, Bettina Schlemmer1,  Julia Hönigsberger1, Bernadette Ortner1,2, Georg Haberfehlner2, Elena Zuccala1, Virginia Lafranconi1

1) ICTM - Institute for Chemistry and Technology of Materials, Graz University of Technology, Graz, Austria

2) FELMI - Institute of Electron Microscopy and Nanoanalysis, Graz University of Technology, Graz, Austria

Organic solar cells can be manufactured in efficient and low cost roll-to-roll processes and have reached power conversion efficiencies above 20%. Especially the development of non-fullerene acceptors has led to remarkable improvements of the OPV efficiencies. The last essential issue to be solved before the technology can be commercialized on a GW scale, is the still moderate stability of OPV limiting the lifetime to a few years. Thus, within this work, we summarize our investigations on polymer/non-fullerene acceptor organic solar cells (OSCs)

The stability of OSC is influenced by a multitude of factors :

Due to the various materials and suppliers a complete understanding and generalization is often difficult.

Thus in our study we combine standard solar cell characterisation and lifetime tests under different conditions with a combination of characterisaiton methods including scanning transmission electron microscopy (STEM) with electron dispersion spectroscopy (EDS) and electron energy loss spectroscopy (EELS) or pyrolysis - gas chromatography (GC) - mass spectrometry (MS).