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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 17: Poster Session I
CPP 17.35: Poster
Monday, March 27, 2023, 18:00–20:00, P3
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, Yusuf Bulut1,2, Stephan V. Roth2,3, and Peter Müller-Buschbaum1,4 — 1TUM School of Natural Science, Chair for Functional Materials, 85748 Garching, Germany — 2Deutsches Elektronen-Synchrotron (DESY), 22607 Hamburg, Germany — 3Department of Fibre and Polymer Technology, KTH, Stockholm, Sweden — 4MLZ, TUM, 85748 Garching, Germany
It is crucial for the efficiency perovskite solar cells to promote the charge transport and suppress the non-radiation recombination in the hole blocking layer (HBL) and at the interface between the HBL and the active layer. Here, TiOx layers are deposited onto a SnO2 layer via sputter deposition at room temperature, forming a bilayer HBL. The structure evolution of TiOx during sputter deposition is investigated via in situ grazing-incidence small-angle X-ray scattering. After sputter deposition of TiOx with suitable thickness on the SnO2 layer, the bilayer HBL shows a suitable transmittance, smoother surface roughness, fewer surface defects and more suitable energy arrangement with active layer, and thus resulting in a 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.