Wavy Graphene Nanoribbons Containing Periodic Eight‐Membered Rings for Light‐Emitting Electrochemical Cells
Year: 2024
Type: article
Abstract: Precision graphene nanoribbons (GNRs) offer distinctive physicochemical properties that are highly dependent on their geometric topologies, thereby holding great potential for applications in carbon‐based optoelectronics and spintronics. While the edge structure and width control has been a popular strategy for engineering the optoelectronic properties of GNRs, non‐hexagonal‐ring‐containing GNRs remain underexplored due to synthetic challenges, despite offering an equally high potential for tailored properties. Herein, we report the synthesis of a wavy GNR (wGNR) by embedding periodic eight‐membered rings into its carbon skeleton, which is achieved by the A2B2‐type Diels–Alder polymerization between dibenzocyclooctadiyne (6) and dicyclopenta[e,l]pyrene‐5,11‐dione derivative (8), followed by a selective Scholl reaction of the obtained ladder‐type polymer (LTP) precursor. The obtained wGNR, with a length of up to 30 nm, has been thoroughly characterized by solid‐state NMR, FT‐IR, Raman, and UV/Vis spectroscopy with the support of DFT calculations. The non‐planar geometry of wGNR efficiently prevents the inter‐ribbon π–π aggregation, leading to photoluminescence in solution. Consequently, the wGNR can function as an emissive layer for organic light‐emitting electrochemical cells (OLECs), offering a proof‐of‐concept exploration in implementing luminescent GNRs into optoelectronic devices. The fast‐responding OLECs employing wGNR will pave the way for advancements in OLEC technology and other optoelectronic devices.
Authors: Sebastian Obermann, Xin Zhou, L. Andrés Guerrero‐León, Gianluca Serra, Steffen Böckmann, Yubin Fu, Evgenia Dmitrieva, Jin‐Jiang Zhang, Fupin Liu, Alexey A. Popov, Andrea Lucotti, Michael Ryan Hansen, Matteo Tommasini, Yungui Li, Paul W. M. Blom, Ji Ma, Xinliang Feng
Institutions: Center for Advancing Electronics Dresden, Technische Universität Dresden, Max Planck Institute for Polymer Research, Politecnico di Milano, University of Münster, Leibniz Institute for Solid State and Materials Research, Max Planck Institute of Microstructure Physics, University of Chinese Academy of Sciences, Chinese Academy of Sciences
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $5,510
Funders: Graphene Flagship, Deutsche Forschungsgemeinschaft, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Technische Universität Dresden, China Scholarship Council, Horizon 2020 Framework Programme, Helmholtz-Zentrum Berlin für Materialien und Energie, HORIZON EUROPE European Innovation Council
OpenAlex ID: W4402524152