Berlin 2024 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 10: Electrical, Dielectrical and Optical Properties of Thin Films
CPP 10.3: Vortrag
Montag, 18. März 2024, 15:30–15:45, H 0111
In-situ GISAXS study on the correlation of strain and photoluminescence in PbS quantum dot superlattice films on flexible substrates — •Julian E. Heger1, Wei Chen1,2, Huaying Zhong1, Tianxiao Xiao1, Constantin Harder1,3, Fabian A. C. Apfelbeck1, Alexander F. Weinzierl1, Regine Boldt4, Lucas Schraa4, Eric Euchler4, Anna K. Sambale4, Konrad Schneider4, Matthias Schwartzkopf3, Stephan V. Roth3,5, and Peter Müller-Buschbaum1,6 — 1TUM School for Natural Sciences, Chair for Functional Materials, Garching, Germany — 2SZTU, Shenzhen, China — 3DESY, Hamburg, Germany — 4IPF, Dresden, Germany — 5KTH, Stockholm, Sweden — 6MLZ, TUM, Garching, Germany
PbS quantum dots (QDs) show high potential as active materials in diverse optoelectronic devices, such as solar cells and photodetectors. When organized into thin films, ligand-capped PbS QDs form a superlattice structure, greatly impacting their optoelectronic properties, since the interaction among adjacent PbS QDs relies significantly on their proximity. This study examines how the superlattice arrangement of PbS QDs alters when subjected to external strain. To conduct this exploration, PbS QD thin films are fabricated on flexible PDMS substrates. In-situ grazing-incidence small-angle X-ray scattering (GISAXS) alongside photoluminescence (PL) examines how these samples deform under different levels of strain. The primary objective of this study is to correlate the structural modifications induced by strain and the consequent alterations in optoelectronic performance.
Keywords: superlattice deformation; flexible substrates; GISAXS; PL