• Balos, Vasileios
• Sporrer, Lukas
• Petkov, Petko
• Revuelta, Sergio
• Cánovas, Enrique
• Löffler, Markus
• Wang, Mingchao
• Feng, Xinliang
• Huang, Zhehao
• Kuc, Angieszka
• Dong, Renhao
• Jastrzembski, Kamil
• Zhou, Guojun
• Heine, Thomas

Abstract

<jats:title>Abstract</jats:title><jats:p>Two‐dimensional conjugated metal–organic frameworks (2D <jats:italic>c‐</jats:italic>MOFs) are emerging as a unique class of electronic materials. However, 2D <jats:italic>c</jats:italic>‐MOFs with band gaps in the Vis‐NIR and high charge carrier mobility are rare. Most of the reported conducting 2D <jats:italic>c‐</jats:italic>MOFs are metallic (i.e. gapless), which largely limits their use in logic devices. Herein, we design a phenanthrotriphenylene‐based, D<jats:sub>2h</jats:sub>‐symmetric π‐extended ligand (<jats:bold>OHPTP</jats:bold>), and synthesize the first rhombic 2D <jats:italic>c‐</jats:italic>MOF single crystals (<jats:bold>Cu<jats:sub>2</jats:sub>(OHPTP)</jats:bold>). The continuous rotation electron diffraction (cRED) analysis unveils the orthorhombic crystal structure at the atomic level with a unique slipped AA stacking. The <jats:bold>Cu<jats:sub>2</jats:sub>(OHPTP)</jats:bold> is a <jats:italic>p</jats:italic>‐type semiconductor with an indirect band gap of ≈0.50 eV and exhibits high electrical conductivity of 0.10 S cm<jats:sup>−1</jats:sup> and high charge carrier mobility of ≈10.0 cm<jats:sup>2</jats:sup> V<jats:sup>−1</jats:sup> s<jats:sup>−1</jats:sup>. Theoretical calculations underline the predominant role of the out‐of‐plane charge transport in this semiquinone‐based 2D <jats:italic>c‐</jats:italic>MOF.</jats:p>

Topics

• impedance spectroscopy
• single crystal
• mobility
• electron diffraction
• semiconductor
• electrical conductivity