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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 22: Electrical, Dielectrical and Optical Properties of Thin Films
CPP 22.2: Vortrag
Montag, 16. März 2020, 15:15–15:30, ZEU 114
Printed colloidal PbS quantum dots solids for optoelectronics — •Wei Chen1, Haodong Tang2, Nian Li1, Manuel Andree Scheel1, Yue Xie2, Volker Körstgens1, Matthias Schwartzkopf3, Stephan Roth3, Kai Wang2, Xiao Wei Sun2, and Peter Müller-Buschbaum1 — 1Lehrstuhl für Funktionelle Materialien, Physik Department, Technische Universität München, 85748 Garching, Germany — 2SUSTech, 518055 Shenzhen, China — 3DESY, 22607 Hamburg, Germany
Colloidal PbS quantum dots (QDs) are attractive in photovoltaics applications due to not only the larger spectral range for the photon-electron response but also the compatibilities with various thin-film deposition methods, including spray and printing depositions. In this work, we use a slot-die coating method for particle deposition integrated with a layer-by-layer method for ligand exchange treatment to fabricate QDs planar structured solar cells with larger effective areas and less waste of QDs than commonly applied deposition methods. The particle kinetics of QDs during the printing deposition for pristine QD films is studied by time-resolved grazing-incidence small-angle X-ray scattering (GISAXS). Further, the surface morphologies and the inner structures of ligand exchanged QDs solid are studied by scanning electron microscope, atomic force microscope, and GIWAXS. Moreover, the time-resolved photoluminescence spectroscopy with spectral mapping is used to compare and discuss the charge carrier dynamics of ligand exchanged QD solids made by printing and regularly spin-coating deposition methods respectively.