Regensburg 2022 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 37: Interfaces and Thin Films and Responsive and Adaptive Systems
CPP 37.6: Vortrag
Donnerstag, 8. September 2022, 12:15–12:30, H39
Superlatice deformation via uniaxial strain and its impact on photoluminescence in PbS quantum dot thin films — •Julian E. Heger1, Wei Chen1, Huaying Zhong1, Tianxiao Xiao1, Constantin Harder1,2, Fabian A. C. Apfelbeck1, Alexander Weinzierl1, Regine Boldt3, Lucas Schraa3, Eric Euchler3, Anna K. Sambale3, Konrad Schneider3, Matthias Schwartzkopf2, Stephan V. Roth2,4, and Peter Müller-Buschbaum1,5 — 1TU München, Physik-Department, LS Funktionelle Materialien, 85748 Garching — 2DESY, 22607 Hamburg — 3Leibniz-Institut für Polymerforschung IPFDD, 01069 Dresden — 4Royal Institute of Technology KTH, 100 44 Stockholm — 5MLZ, TU München, 85748 Garching
Colloidal lead sulfide quantum dots (PbS CQDs) show high potential for the application in flexible electronics, as they are solution processible with tunable optoelectronic properties. In thin films, PbS CQDs form a superlattice morphology that tailors these optoelectronic properties. For instance, electronic coupling between adjacent PbS CQDs is dependent on the inter-dot distance in the superlattice. In this work, we investigate the superlattice deformation during applied external strain. For this, PbS CQDs thin films are prepared on flexible PDMS substrates. The samples are investigated with in situ GISAXS and photoluminescence measurements at different levels of strain to correlate the deformation-induced morphological changes to the optoelectronic performance.