Dresden 2017 – scientific programme
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DS: Fachverband Dünne Schichten
DS 5: Fundamentals of Perovskite Photovoltaics I (jointly with CPP)
DS 5.4: Talk
Monday, March 20, 2017, 11:15–11:30, ZEU 222
Strong impact of processing parameters on morphology and crystal orientation of hybrid perovskite thin films for photovoltaic application — •Johannes Schlipf1, Lukas Oesinghaus1, Yinghong Hu2, Nadja Giesbrecht2, Sigrid Bernstorff3, Thomas Bein2, Pablo Docampo4, and Peter Müller-Buschbaum1 — 1TU München, Physik-Department, LS Funktionelle Materialien, James-Franck-Str. 1, 85748 Garching — 2Department of Chemistry and CENS, LMU München, 80539 München — 3Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, 34149 Trieste, Italy — 4Newcastle University, School of Electrical and Electronic Engineering, Newcastle upon Tyne NE1 7RU, UK
After five years of rapid research, power conversion efficiencies of hybrid perovskite solar cells (PSC) around 20% have become feasible for solution-processed multicrystalline thin films. However, photovoltaic performance, reproducibility and stability of PSC devices depend on crystal size and orientation which in turn are affected by processing parameters during synthesis. We investigate hybrid perovskite thin films with small and wide angle X-ray scattering (GISAXS, GIWAXS) and thereby identify key crystallization mechanisms that strongly influence film morphology and crystal orientation [1,2]. This not only shows the importance of rigorous control of processing parameters, but also renders film morphologies tunable which allows for a rational development of new synthesis methods for high efficiency PSC. [1] J. Schlipf et al., J. Phys. Chem. Lett. 2015, 6, 1265. [2] L. Oesinghaus et al., Adv. Mater. Interfaces 2016, 1600403.