Issue 2, 2023

Highly conductive and long-term stable films from liquid-phase exfoliated platinum diselenide

Abstract

Liquid-phase exfoliation (LPE) has been introduced as a versatile and scalable production method for two-dimensional (2D) materials. This method yields dispersions that allow for the fabrication of printable and flexible electronic devices. However, the fabrication of uniform and homogeneous films from LPE dispersions with a performance similar to that of bottom-up grown materials remains a challenge, as the film quality strongly influences the optical and electrical performance of devices. Furthermore, long-term stability remains a major challenge for all 2D material based applications. In this study, we report on highly conductive tiled network films made of platinum diselenide (PtSe2) flakes derived using a scalable LPE method. We characterized the homogeneous films in terms of morphology and electrical behavior. As an example of applicability, we produce a chemiresistive sensor structure with the PtSe2 films and show significant resistance changes upon periodic ammonia gas exposures, revealing a sub-0.1 part per million (ppm) detection limit (DL). More remarkably the devices are fully functional after 15 months, underlining the high stability of PtSe2 based devices.

Graphical abstract: Highly conductive and long-term stable films from liquid-phase exfoliated platinum diselenide

Supplementary files

Article information

Article type
Paper
Submitted
15 9 2022
Accepted
03 11 2022
First published
16 12 2022
This article is Open Access
Creative Commons BY license

J. Mater. Chem. C, 2023,11, 593-599

Highly conductive and long-term stable films from liquid-phase exfoliated platinum diselenide

K. Lee, B. M. Szydłowska, O. Hartwig, K. Synnatschke, B. Tywoniuk, T. Hartman, T. Tomašević-Ilić, C. P. Gabbett, J. N. Coleman, Z. Sofer, M. Spasenović, C. Backes and G. S. Duesberg, J. Mater. Chem. C, 2023, 11, 593 DOI: 10.1039/D2TC03889G

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