Regensburg 2019 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 37: Poster Session III
CPP 37.9: Poster
Mittwoch, 3. April 2019, 11:00–13:00, Poster B1
Mesoporous Titania Backfilled with Heavy Element Containing Small Molecules and High-Efficiency Polymer PTB7-Th for Hybrid Photovoltaics — •Raphael Märkl1, Nuri Hohn1, Emanuel Hupf2, Gaetano Mangiapia3, Matthias Pomm3, Eric Rivard2, and Peter Müller-Buschbaum1 — 1TU München, Physik-Department, LS Funktionelle Materialien, 85748 Garching, Germany — 2University of Alberta, Department of Chemistry, Edmonton, Canada — 3Helmholtz-Zentrum Geesthacht at Heinz Maier-Leibnitz Zentrum, Garching
Hybrid photovoltaic devices have recently attracted significant research attention due to improvements in efficiency by tailoring the organic-inorganic interface. Mesoporous titania films are synthesized utilizing polystyrene-b-polyethyleneoxide diblock copolymer templating in a sol-gel approach. A hybrid photovoltaic active layer is then achieved by infiltrating the organic component into the resulting mesoporous titania scaffold. We investigate the backfilling of organic polymer PTB7-Th and novel tellurophene Phen-Te-BPinPh small molecule into the mesoporous titania films by ToF-GISANS. While the backfilling efficiency of PTB7-Th proves to be sensitive to the polymer concentration, Phen-Te-BPinPh is backfilled easily into the titania matrix due to its small size. Complementary X-ray scattering techniques are used in obtaining the SLD profile required for ToF-GISANS analysis and the crystal structure of respective thin films. Conclusions derived from real space investigation via SEM are found in agreement with these results.