A Cu3BHT-Graphene van der Waals Heterostructure with Strong Interlayer Coupling

TL;DR

This paper reports the synthesis and characterization of a Cu3BHT-graphene van der Waals heterostructure exhibiting strong interlayer coupling, enabling efficient charge transfer and opening new avenues for quantum optoelectronic applications.

Contribution

It introduces a novel organic-inorganic 2D heterostructure with strong interlayer coupling, demonstrated through spectroscopic, electrical, and theoretical analyses.

Findings

Significant hole transfer from Cu3 BHT to graphene

Strong interlayer coupling evidenced by spectroscopic and electrical data

Potential for exploring new physical phenomena with 2DCP-based heterostructures

Abstract

Two dimensional van der Waals heterostructures (2D are of significant interest due to their intriguing physical properties that are critically defined by the constituent monolayers and their interlayer coupling . However, typical inorganic 2 D vdWhs fall into the weakly coupled region, limiting efficient interfacial charge flow crucial for developing high performance quantum opto electronics. Here, we demonstrate strong interlayer coupling in Cu3 BHT (BHT = benzenehexathiol) graphene vdWhs an organic inorganic bilayer characterized by prominent interlayer charge transfer Monolayer Cu3 BHT with a Kagome lattice is synthesized on the water surface and then coupled with graphene to produce a cm2 scale 2D vdWh. Spectroscopic and electrical studies, along with theoretical calculation s show significant hole transfer from monolayer Cu3 BHT to graphene upon contact , being characteristic fingerprints for strong interlayer coupling This study unveils the great potential of integrating highly pi-conjugated 2D coordination polymers (2DCPs) into 2D vdWhs to explor e intriguing physical phenomena.