Regensburg 2022 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 42: 2D Materials 6 (joint session HL/CPP/DS)

HL 42.8: Talk

Friday, September 9, 2022, 11:30–11:45, H36

Conductive 2D MOFs in van-der-Waals heterostructures — •Jonas Pöhls¹, Zhiyong Wang², Renhao Dong², and Thomas Weitz¹ — ¹I. Physical Institute University of Göttingen, Göttingen, Germany — ²Technical University of Dresden, Dresden, Germany

In conventional three-dimentional (3D) Metal-Organic Frameworks (MOFs) the electric conductivity is limited by the large separation of the metal centers by the organic ligands. Recent advantages in the synthesis of layered two-dimensional conjugated MOFs (2D c-MOFs) lead to a large improvement of the electronic properties, these materials allow a charge transfer along both interlayer (π-π-stacking) and intralayer (basal plane) directions [1]. In order to elucidate the underlying charge transport mechanisms in the 2D c-MOFs, we perform electronic characterizations of the films implemented in field-effect transistors under varying conditions. In addition to the improved properties of the 2D c-MOFs themselves, their 2D nature make them also a promising candidate for the fabrication of van-der-Waals heterostructures with other 2D materials like graphene, which could give access to a variety of interaction-driven effects. We present first results on the charge transport of 2D c-MOFs down to the size of single crystals as well as implemented in van-der-Waals heterostructures.

[1] Z. Wang et al. "Interfacial Synthesis of Layer-Oriented 2D Conjugated Metal*Organic Framework Films toward Directional Charge Transport", J. Am. Chem. Soc. (2021)