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Authors
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Niu, W. ; Soltani, P. ; Zheng, W. ; Liu, F. ; Popov, A. A. ; Weigand, J. J. ; Komber, H. ; Poliani, E. ; Cashiraghi, C. ; Droste, J. ; Hanse, M.R. ; Osella, S. ; Beljonne, D. ; Bonn, M. ; Wang, H. ; Feng, X. ; Liu, J. ; Mai, Y.
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Title
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A curved graphene nanoribbon with multi-edge structure and high intrinsic charge carrier mobility
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Date
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20.10.2020
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Number
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58689
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Abstract
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Structurally well-defined graphene nanoribbons (GNRs) have emerged as highly promising materials for the next-generation nanoelectronics. The electronic properties of GNRs critically depend on their edge topologies. Here, we demonstrate the efficient synthesis of a curved GNR (cGNR) with a combined cove, zigzag, and armchair edge structure, through bottom-up synthesis. The curvature of the cGNR is elucidated by the corresponding model compounds tetrabenzo[a,cd,j,lm]perylene (1) and diphenanthrene-fused tetrabenzo[a,cd,j,lm]perylene (2), the structures of which are unambiguously confirmed by the X-ray single-crystal analysis. The resultant multi-edged cGNR exhibits a well-resolved absorption at the near-infrared (NIR) region with a maximum peak at 850 nm, corresponding to a narrow optical energy gap of ~1.22 eV. Employing THz spectroscopy, we disclose a long scattering time of ~60 fs, corresponding to a record intrinsic charge carrier mobility of ~600 cm2 V–1 s–1 for photogenerated charge carriers in cGNR.
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Publisher
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Journal of the American Chemical Society
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Wikidata
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Citation
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Journal of the American Chemical Society 142 (2020) 18293-18298
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DOI
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https://doi.org/10.1021/JACS.0C07013
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