Berlin 2018 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

CPP: Fachverband Chemische Physik und Polymerphysik

CPP 46: Poster Session IV

CPP 46.39: Poster

Mittwoch, 14. März 2018, 11:00–13:00, Poster A

Printed films of conjugated polymers and small acceptor molecules — •Kerstin Wienhold and Peter Müller-Buschbaum — TU München, Physik Department, LS Funktionelle Materialien, 85748 Garching

Organic photovoltaics are a promising alternative to conventional silicon solar cells as they offer several potential advantages e.g. low weight, high mechanical flexibility and low-cost production. Resent research focuses on identifying new high-efficiency polymers and acceptor molecules to reach high power conversion efficiencies (PCEs). To date, a PCE of 13% could be obtained with a PBDB-T-SF: IT-4F based organic solar cell devices. The fluorinated conjugated polymer PBDB-T-SF acts as a donor whereas the fluorinated small molecule IT-4F acts as an electron acceptor. Both molecules are promising for photovoltaic applications as they show higher absorption coefficients, higher efficiency in exciton separation and charge transport as well as enhanced chemical stability as compared with their non-fluorinated counterparts. However, before commercialization, the solar cell performance must be optimized and an up-scale of the thin layer deposition is necessary. Printing of the individual layers of the solar cells can overcome the up-scale challenge. We print thin PBDB-T-SF: IT-4F films. Characterization techniques such as UV/Vis spectroscopy, photoluminescence and scattering methods such as GISAXS and GIWAXS are applied to get a deeper insight into the composition and morphology of the active layer of the printed films with the aim to further improve the solar cell efficiencies.