A Curved Graphene Nanoribbon with Multi-Edge Structure and High Intrinsic Charge Carrier Mobility,Journal of the American Chemical Society

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A Curved Graphene Nanoribbon with Multi-Edge Structure and High Intrinsic Charge Carrier Mobility
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2020-10-20 , DOI: 10.1021/jacs.0c07013
Wenhui Niu _{1,

2} , Ji Ma ₂ , Paniz Soltani ₃ , Wenhao Zheng ₃ , Fupin Liu ₄ , Alexey A. Popov ₄ , Jan J. Weigand ₅ , Hartmut Komber ₆ , Emanuele Poliani ₇ , Cinzia Casiraghi ₇ , Jörn Droste ₈ , Michael Ryan Hansen ₈ , Silvio Osella ₉ , David Beljonne ₁₀ , Mischa Bonn ₃ , Hai I. Wang ₃ , Xinliang Feng ₂ , Junzhi Liu _{2,

11} , Yiyong Mai ₁

Affiliation

School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
Center for Advancing Electronics Dresden (cfaed), Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, D-01062 Dresden, Germany
Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany
Leibniz Institute for Solid State and Materials Research, D-01069 Dresden, Germany
Department of Inorganic Molecular Chemistry, Technische Universität Dresden, D-01062 Dresden, Germany
Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Straße 6, D-01069 Dresden, Germany
Department of Chemistry, Manchester University, Oxford Road, Manchester M13 9PL, United Kingdom
Institute of Physical Chemistry, Westfälische Wilhelms-Universität (WWU) Münster, Corrensstraße 28/30, D-48149 Münster, Germany
Biological Systems Simulation Lab, Center of New Technologies, University of Warsaw, Banacha 2C, 02-097 Warsaw, Poland
Laboratory for Chemistry of Novel Materials, Université de Mons, Place du Parc, 20, B-7000 Mons, Belgium
Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong 999077, China

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.

中文翻译：

具有多边缘结构和高内在载流子迁移率的弯曲石墨烯纳米带

结构明确的石墨烯纳米带（GNRs）已成为下一代纳米电子学非常有前途的材料。GNR 的电子特性严重依赖于它们的边缘拓扑结构。在这里，我们通过自下而上的合成展示了具有组合的凹形、锯齿形和扶手椅边缘结构的弯曲 GNR (cGNR) 的有效合成。cGNR 的曲率由相应的模型化合物四苯并 [a,cd,j,lm] 苝 (1) 和二菲稠合的四苯并 [a,cd,j,lm] 苝 (2) 阐明，其结构为X 射线单晶分析明确证实。所得的多边 cGNR 在近红外 (NIR) 区域表现出良好的吸收，最大峰值在 850 nm，对应于 ~1.22 eV 的窄光能隙。采用太赫兹光谱，

更新日期：2020-10-20

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