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Liu, Yamei [Author]; Heng, [Author]; Yu, Hongde [Author]; Liao, Zhongquan [Author]; Paasch, Silvia [Author]; Xu, Shunqi [Author]; Zhao, Ruyan [Author]; Brunner, Eike [Author]; Bonn, Mischa [Author]; Wang, Hai I. [Author]; Heine, Thomas [Author]; Wang, Mingchao [Author]; Mai, Yiyong [Author]; Feng, Xinliang [Author]

A thiophene backbone enables two‐dimensional poly(arylene vinylene)s with high charge carrier mobility

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  • Media type: E-Article
  • Title: A thiophene backbone enables two‐dimensional poly(arylene vinylene)s with high charge carrier mobility
  • Contributor: Liu, Yamei [Author]; Heng, [Author]; Yu, Hongde [Author]; Liao, Zhongquan [Author]; Paasch, Silvia [Author]; Xu, Shunqi [Author]; Zhao, Ruyan [Author]; Brunner, Eike [Author]; Bonn, Mischa [Author]; Wang, Hai I. [Author]; Heine, Thomas [Author]; Wang, Mingchao [Author]; Mai, Yiyong [Author]; Feng, Xinliang [Author]
  • imprint: Weinheim : Wiley-VCH, [2024]
  • Language: English
  • DOI: 10.1002/anie.202305978
  • ISSN: 1433-7851
  • Keywords: 2D Poly (AryleneVinylene)s ; Chemie und Pharmazie ; Charge Mobility ; science-chemistry ; Band-Like Transport ; Thiophene Backbone ; 2D Conjugated COFs
  • Origination:
  • Footnote: Hinweis: Link zum Artikel, der zuerst in der Zeitschrift „Angewandte Chemie : a journal of the Gesellschaft Deutscher Chemiker ; International edition” erschienen ist. DOI: 10.1002/anie.202305978
  • Description: Linear conjugated polymers have attracted significant attention in organic electronics in recent decades. However, despite intrachain π-delocalization, interchain hopping is their transport bottleneck. In contrast, two-dimensional (2D) conjugated polymers, as represented by 2D π-conjugated covalent organic frameworks (2D c-COFs), can provide multiple conjugated strands to enhance the delocalization of charge carriers in space. Herein, we demonstrate the first example of thiophene-based 2D poly(arylene vinylene)s (PAVs, 2DPAV-BDT-BT and 2DPAV-BDT-BP, BDT=benzodithiophene, BT=bithiophene, BP=biphenyl) via Knoevenagel polycondensation. Compared with 2DPAV-BDT-BP, the fully thiophene-based 2DPAV-BDT-BT exhibits enhanced planarity and π-delocalization with a small band gap (1.62 eV) and large electronic band dispersion, as revealed by the optical absorption and density functional calculations. Remarkably, temperature-dependent terahertz spectroscopy discloses a unique band-like transport and outstanding room-temperature charge mobility for 2DPAV-BDT-BT (65 cm2 V−1 s−1), which far exceeds that of the linear PAVs, 2DPAV-BDT-BP, and the reported 2D c-COFs in the powder form. This work highlights the great potential of thiophene-based 2D PAVs as candidates for high-performance opto-electronics.
  • Access State: Open Access
  • Rights information: Attribution (CC BY)