Regensburg 2016 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 45: Hybrid and Perovskite Photovoltaics III (Joint session of CPP, DS and HL, organized by CPP)
HL 45.8: Vortrag
Mittwoch, 9. März 2016, 11:30–11:45, H11
A low temperature route towards hierarchically structured titania films for thin hybrid solar cells — •Lin Song1, Amr Abdelsamie1, Christoph J. Schaffer1, Volker Körstgens1, Weijia Wang1, Nicola Hüsing2, Paolo Lugli3, and Peter Müller-Buschbaum1 — 1TU München, Physik-Department, LS Funktionelle Materialien, 85748 Garching, Germany — 2Materialchemie, FB Chemie und Physik der Materialien, Universität Salzburg, Hellbrunnerstr. 34, 5020 Salzburg, Austria — 3TU München, Department of Electrical Engineering and Information Technology, Institute for Nanoelectronics, 80333 München, Germany
Fabricating titania based solar cells at low temperature has a high significance regarding energy efficacy , since most of photovoltaic devices with titania require high-temperature calcination. Moreover, a low-temperature process offers the potential for flexible solar cells. However, this kind of solar cells has a low efficiency. In order to improve the device performance, we make superimposed structural order on titania films from nanometer to submicrometer length scales. Hierarchical structural order enhances light harvesting in solar cells, thereby enhancing the photovoltaic performance. Titania nanostructures are obtained via PS-b-PEO template assisted sol-gel processing. Nano-imprint lithography (NIL) provides ordered submicrometer patterns as a superstructure over nanostructured titania films. SEM and AFM measurements map the film surface morphology, and GISAXS measurements yield information about the bulk film morphology. The optoelectronic properties are examined by UV/Vis spectroscopy.