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journal article·2024-05Open access

A Cu3BHT‐Graphene van der Waals Heterostructure with Strong Interlayer Coupling for Highly Efficient Photoinduced Charge Separation

Zhiyong Wang, Shuai Fu, Wenjie Zhang, Baokun Liang, Tsai‐Jung Liu, Mike Hambsch, Jonas F. Pöhls, Yufeng Wu, Jianjun Zhang, Tianshu Lan, Xiaodong Li, Haoyuan Qi, Miroslav Polozij, Stefan C. B. Mannsfeld, Ute Kaiser, Mischa Bonn, R. Thomas Weitz, Thomas Heine, Stuart S. P. Parkin, Hai I. Wang, Renhao Dong, Xinliang Feng

Advanced Materials· Volume 36· Issue 21
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Abstract

Abstract Two‐dimensional van der Waals heterostructures (2D vdWhs) are of significant interest due to their intriguing physical properties critically defined by the constituent monolayers and their interlayer coupling. Synthetic access to 2D vdWhs based on chemically tunable monolayer organic 2D materials remains challenging. Herein, the fabrication of a novel organic–inorganic bilayer vdWh by combining π‐conjugated 2D coordination polymer (2DCP, i.e., Cu3BHT, BHT = benzenehexathiol) with graphene is reported. Monolayer Cu3BHT with detectable µm2‐scale uniformity and atomic flatness is synthesized using on‐water surface chemistry. A combination of diffraction and imaging techniques enables the determination of the crystal structure of monolayer Cu3BHT with atomic precision. Leveraging the strong interlayer coupling, Cu3BHT‐graphene vdWh exhibits highly efficient photoinduced interlayer charge separation with a net electron transfer efficiency of up to 34% from Cu3BHT to graphene, superior to those of reported bilayer 2D vdWhs and molecular‐graphene vdWhs. This study unveils the potential for developing novel 2DCP‐based vdWhs with intriguing physical properties.
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Research context

PolymersNanomaterials

OpenAlex topics: 2D Materials and Applications · Graphene research and applications · ZnO doping and properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Synthetic Materials and Functional Devices Max Planck Institute of Microstructure Physics 06120 Halle (Saale) Germany

Center for Advancing Electronics Dresden (cfaed) and Faculty of Chemistry and Food Chemistry Technische Universität Dresden 01062 Dresden Germany

Department of Molecular Spectroscopy Max Planck Institute for Polymer Research 55128 Mainz Germany

Central Facility for Electron Microscopy Electron Microscopy of Materials Science Ulm University 89081 Ulm Germany

Center for Advancing Electronics Dresden (cfaed) and Faculty of Electrical and Computer Engineering Technische Universität Dresden 01069 Dresden Germany

First Institute of Physics Georg August University of Göttingen 37077 Göttingen Germany

Helmholtz‐Zentrum Dresden‐Rossendorf Institute of Resource Ecology 04318 Leipzig Germany

Department of Chemistry Yonsei University 120‐749 Seoul Republic of Korea

Nanophotonics Debye Institute for Nanomaterials Science Utrecht University Utrecht 3584 CC the Netherlands

Key Laboratory of Colloid and Interface Chemistry of the Ministry of Education School of Chemistry and Chemical Engineering Shandong University Jinan 250199 China

Funding

National Natural Science Foundation of China · Natural Science Foundation of Shandong Province

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