Role of Edge Engineering in Photoconductivity of Graphene Nanoribbons

Journal of the American Chemical Society
Ivan IvanovMischa Bonn

Abstract

The effect of edge engineering of graphene nanoribbons (GNRs) on their ultrafast photoconductivity is investigated. Three different GNRs were fabricated by bottom-up synthesis in the liquid phase, where structure, width, and edge planarity could be controlled chemically at the atomic level. The charge carrier transport in the fabricated GNRs was studied on the ultrafast, sub-picosecond time scale using time-resolved terahertz spectroscopy, giving access to the elementary parameters of carrier conduction. While the variation of the side chains does not alter the photoconductive properties of GNRs, the edge structure has a strong impact on the carrier mobility in GNRs by affecting the carrier momentum scattering rate. Calculations of the ribbon electronic structure and theoretical transport studies show that phonon scattering plays a significant role in microscopic conduction in GNRs with different edge structures. A comparison between theory and experiment indicates that the mean free path of charge carriers in the nanoribbons amounts to typically ∼20 nm.

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Citations

Nov 17, 2017·Nanoscale·Richard DenkAndrea Ferretti
Sep 22, 2020·Chemistry, an Asian Journal·Ashok KeerthiKlaus Müllen
Apr 8, 2021·Journal of the American Chemical Society·Xuelin YaoAkimitsu Narita
May 9, 2021·Photosynthesis Research·Matthew C DrummerKsenija D Glusac
Aug 8, 2018·Journal of the American Chemical Society·Yinjuan HuangYiyong Mai
Nov 4, 2017·Journal of the American Chemical Society·Ashok KeerthiAkimitsu Narita
Mar 13, 2020·Nano Letters·Rebecca MomperAndreas Riedinger
Jul 4, 2019·Journal of the American Chemical Society·Fugui XuYiyong Mai
Oct 7, 2020·Journal of the American Chemical Society·Zhaoyang LiuKlaus Müllen
Mar 26, 2020·Nano Letters·Alexander TriesHai I Wang
Oct 21, 2020·Journal of the American Chemical Society·Wenhui NiuYiyong Mai
Dec 23, 2021·Science Advances·Heng ZhangHai I Wang
Dec 29, 2021·Journal of the American Chemical Society·Xu WangXinliang Feng

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