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Near IR Bandgap Semiconducting 2D Conjugated Metal-Organic Framework with Rhombic Lattice and High Mobility |
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| Authors: | Lukas Sporrer Dr. Guojun Zhou Dr. Mingchao Wang Dr. Vasileios Balos Sergio Revuelta Kamil Jastrzembski Dr. Markus Löffler Prof. Dr. Petko Petkov Prof. Thomas Heine Dr. Angieszka Kuc Prof. Dr. Enrique Cánovas Dr. Zhehao Huang Prof. Dr. Xinliang Feng Prof. Dr. Renhao Dong |
| Affiliation: | 1. Chair of Molecular Functional Materials, Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, Mommsenstrasse 4, 01062 Dresden, Germany These authors contributed equally to this work.;2. Department of Materials and Environmental Chemistry, Stockholm University, 10691 Stockholm, Sweden These authors contributed equally to this work.;3. Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA Nanociencia), 28049 Madrid, Spain;4. Chair of Molecular Functional Materials, Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, Mommsenstrasse 4, 01062 Dresden, Germany;5. Dresden Centre for Nanoanalysis, Technische Universität Dresden, Helmholtzstr. 18, 01062 Dresden, Germany;6. University of Sofia, Faculty of Chemistry and Pharmacy, 1164 Sofia, Bulgaria;7. Helmholtz-Zentrum Dresden-Rossendorf, Abteilung Ressourcenökologie, Forschungsstelle Leipzig, 04318 Leipzig, Germany;8. Department of Materials and Environmental Chemistry, Stockholm University, 10691 Stockholm, Sweden |
| Abstract: | Two-dimensional conjugated metal–organic frameworks (2D c-MOFs) are emerging as a unique class of electronic materials. However, 2D c-MOFs with band gaps in the Vis-NIR and high charge carrier mobility are rare. Most of the reported conducting 2D c-MOFs are metallic (i.e. gapless), which largely limits their use in logic devices. Herein, we design a phenanthrotriphenylene-based, D2h-symmetric π-extended ligand ( OHPTP ), and synthesize the first rhombic 2D c-MOF single crystals ( Cu2(OHPTP) ). The continuous rotation electron diffraction (cRED) analysis unveils the orthorhombic crystal structure at the atomic level with a unique slipped AA stacking. The Cu2(OHPTP) is a p-type semiconductor with an indirect band gap of ≈0.50 eV and exhibits high electrical conductivity of 0.10 S cm−1 and high charge carrier mobility of ≈10.0 cm2 V−1 s−1. Theoretical calculations underline the predominant role of the out-of-plane charge transport in this semiquinone-based 2D c-MOF. |
| Keywords: | 2D Conjugated MOFs Coordination Polymers High Mobility Semiconductors Single Crystals |