Correlating Nanocrystalline Structure with Electronic Properties in 2D Platinum Diselenide

RWTH Publications (RWTH Aachen)

Abstract

Platinum diselenide (PtSe${_2}$) is a two-dimensional (2D) material with outstanding electronic and piezoresistive properties. The material can be grown at low temperatures in a scalable manner which makes it extremely appealing for many potential electronics, photonics, and sensing applications. Here, we investigate the nanocrystalline structure of different PtSe${_2}$ thin films grown by thermally assisted conversion (TAC) and correlate them with their electronic and piezoresistive properties. We use scanning transmission electron microscopy for structural analysis, X-ray photoelectron spectroscopy (XPS) for chemical analysis, and Raman spectroscopy for phase identification. Electronic devices are fabricated using transferred PtSe${_2}$ films for electrical characterization and piezoresistive gauge factor measurements. The variations of crystallite size and their orientations are found to have a strong correlation with the electronic and piezoresistive properties of the films, especially the sheet resistivity and the effective charge carrier mobility. Our findings may pave the way for tuning and optimizing the properties of TAC-grown PtSe${_2}$ towards numerous applications.

Authors 11

1. Sebastian Lukas Aachen Chair of Electronic Devices

   RWTH Aachen University

   Affiliation as printed

   Chair of Electronic Devices, RWTH Aachen University, Otto-Blumenthal-Str. 2, 52074 Aachen, Germany

2. Oliver Hartwig

   Universität der Bundeswehr München

   Affiliation as printed

   Institute of Physics Faculty of Electrical Engineering and Information Technology (EIT 2) Universität der Bundeswehr München Werner‐Heisenberg‐Weg 39 85577 Neubiberg Germany

3. Max C. Lemme

   Universität der Bundeswehr München

   Affiliation as printed

   Institute of Physics Faculty of Electrical Engineering and Information Technology (EIT 2) Universität der Bundeswehr München Werner‐Heisenberg‐Weg 39 85577 Neubiberg Germany

4. Maximilian Prechtl Aachen AMO GmbH Advanced Microelectronic Center Aachen Chair of Electronic Devices

   AMO (Germany) · RWTH Aachen University

   Affiliation as printed

   AMO GmbH, Advanced Microelectronic Center Aachen, Otto-Blumenthal-Str. 25, 52074 Aachen, Germany

   Chair of Electronic Devices, RWTH Aachen University, Otto-Blumenthal-Str. 2, 52074 Aachen, Germany

5. Giovanna Capraro Aachen AMO GmbH Advanced Microelectronic Center Aachen

   AMO (Germany)

   Affiliation as printed

   AMO GmbH, Advanced Microelectronic Center Aachen, Otto-Blumenthal-Str. 25, 52074 Aachen, Germany

6. Jens Bolten Aachen Central Facility for Electron Microscopy

   Forschungszentrum Jülich · Ernst Ruska Centre · RWTH Aachen University

   Affiliation as printed

   Central Facility for Electron Microscopy, RWTH Aachen University, Ahornstr. 55, 52074 Aachen, Germany

   Ernst Ruska‐Centre for Microscopy and Spectroscopy with Electrons (ER‐C) Forschungszentrum Jülich GmbH 52425 Jülich Germany

7. Alexander Meledin Aachen Central Facility for Electron Microscopy

   Forschungszentrum Jülich · Ernst Ruska Centre · RWTH Aachen University

   Affiliation as printed

   Central Facility for Electron Microscopy, RWTH Aachen University, Ahornstr. 55, 52074 Aachen, Germany

   Ernst Ruska‐Centre for Microscopy and Spectroscopy with Electrons (ER‐C) Forschungszentrum Jülich GmbH 52425 Jülich Germany

8. Joachim Mayer Aachen AMO GmbH Advanced Microelectronic Center Aachen

   University of Wuppertal · AMO (Germany)

   Affiliation as printed

   AMO GmbH, Advanced Microelectronic Center Aachen, Otto-Blumenthal-Str. 25, 52074 Aachen, Germany

   Chair of Smart Sensor Systems Bergische Universität Wuppertal Lise‐Meitner‐Str. 13 42119 Wuppertal Germany

9. Daniel Neumaier Aachen Chair of Electronic Devices

   RWTH Aachen University

   Affiliation as printed

   Chair of Electronic Devices, RWTH Aachen University, Otto-Blumenthal-Str. 2, 52074 Aachen, Germany

10. Satender Kataria

    Universität der Bundeswehr München

    Affiliation as printed

    Institute of Physics Faculty of Electrical Engineering and Information Technology (EIT 2) Universität der Bundeswehr München Werner‐Heisenberg‐Weg 39 85577 Neubiberg Germany

11. Georg Stefan Duesberg corresponding Aachen AMO GmbH Advanced Microelectronic Center Aachen Chair of Electronic Devices

    AMO (Germany) · RWTH Aachen University

    Affiliation as printed

    AMO GmbH, Advanced Microelectronic Center Aachen, Otto-Blumenthal-Str. 25, 52074 Aachen, Germany

    Chair of Electronic Devices, RWTH Aachen University, Otto-Blumenthal-Str. 2, 52074 Aachen, Germany