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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 28: Poster III
CPP 28.34: Poster
Wednesday, March 20, 2024, 11:30–13:30, Poster C
In situ Grazing-Incidence Small-Angle X-ray Scattering Observation of TiOx Sputter Deposition on SnO2 Layer for Perovskite Solar Cells Application — •Xiongzhuo Jiang1, Zhuijun Xu1, Guangjiu Pan1, Yusuf Bulut2, Kristian Reck3, Thomas Strunskus3, Franz Faupel3, Stephan V. Roth2, and Peter Müller-Buschbaum1,4 — 1TUM School of Natural Science, Chair for Functional Materials, 85748 Garching, Germany — 2Deutsches Elektronen-Synchrotron (DESY), 22607 Hamburg, Germany — 3Lehrstuhl für Materialverbunde, Institut für Materialwissenschaft, Christian Albrechts-Universität zu Kiel, 24143 Kiel, Germany — 4TUM, MLZ, 85748 Garching, Germany
It is crucial to suppress the non-radiation recombination in the hole-blocking layer (HBL) and at the interface between the HBL and active layer for performance improvement. We deposited a TiOx thin layer atop the SnO2 layer via sputter deposition at room temperature as an interface modification layer. The structure evolution of TiOx during sputter deposition is investigated via in situ grazing-incidence small-angle X-ray scattering. The HBL, combined with the TiOx interface modification layer, shows a suitable transmittance, smoother surface roughness, and fewer surface defects, thus resulting in lower trap-assisted recombination at the interface between the HBL and the active layer. With this SnO2/TiOx functional bilayer, the perovskite solar cells exhibit higher power conversion efficiencies than the unmodified SnO2 monolayer devices.
Keywords: perovskite solar cells; photovoltaic; sputter deposition