Regensburg 2022 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 18: Poster Session 2
MM 18.42: Poster
Dienstag, 6. September 2022, 17:30–20:00, P2
Electrospun Electroluminescent CsPbBr3 Fibers: Flexible Perovskite Networks for Light-Emitting Application — •Khan Lê1, Florian von Toperczer2, Feray Ünlü1, Thomas Fischer1, Klas Lindfors2, and Sanjay Mathur1 — 1Institute of Inorganic Chemistry, University of Cologne, Greinstr. 6, 50939 Cologne, Germany — 2Institute of Physical Chemistry, University of Cologne, Greinstr. 4-6, 50939 Cologne, Germany
Organic-inorganic and all-inorganic lead halide perovskites (APbX3) have continuously attracted research interest and went through significant improvements towards highly efficient photovoltaic technologies and LEDs. Most lead-halide perovskite devices are based on thin films or quantum dots while reports on alternative morphologies are scarce. We prepared CsPbBr3@polymer composite nanofibers by one-step electrospinning and characterized them by scanning electron microscopy, transmission electron microscopy, X-ray diffractometry, UV/vis and photoluminescence spectroscopy. As a proof-of-concept, we subsequently integrated the fiber mats as active layers in electrically driven light emitting devices. While the synthesis of perovskite nanofibers is not new, to the best of our knowledge we would be the first to report on electroluminescence of such fibers. In addition, all preparations were conducted under ambient atmosphere and the perovskite precursor ink was prepared with low toxicity solvents (H2O/EtOH/ionic liquid). This work could pave the way towards cost effective and flexible optoelectronic fiber- or yarn-based lead-halide perovskite devices by an up-scalable method.