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EFFECT OF SPIN COATING ON ELECTRICAL PROPERTIES OF MXENE FILMS DEPOSITED FROM NON-AQUEOUS SOLVENTS

1,2 GUTSUL Oksana
Co-authors:
3 SZABO Ondrej 1 PFEIFER Rene 1 SASITHARAN Kezia 3 JACKIVOVA Rajisa 4 SLOBODYAN Vsevolod 3 KROMKA Alexander 1 REZEK Bohuslav
Institutions:
1 Faculty of Electrical Engineering, Czech Technical University, Prague, Czech Republic, EU
2 Bukovinian State Medical University, Chernivtsi, Ukraine, gutsul@bsmu.edu.ua
3 Institute of Physics of the Czech Academy of Sciences, Prague, Czech Republic, EU
4 Yuriy Fedkovych Chernivtsi National University, Chernivtsi, Ukraine
Conference:
14th International Conference on Nanomaterials - Research & Application, OREA Congress Hotel Brno, Czech Republic, EU, October 19 - 21, 2022
Proceedings:
Proceedings 14th International Conference on Nanomaterials - Research & Application
Pages:
84-89
ISBN:
978-80-88365-09-9
ISSN:
2694-930X
DOI:
https://doi.org/10.37904/nanocon.2022.4590
Published:
23rd November 2022
Proceedings of the conference have already been published in Scopus and we are waiting for evaluation and potential indexing in Web of Science.
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Abstract

We investigated the effect of spin coating parameters on the electrical properties of Ti3C2 MXene thin films deposited from non-aqueous suspensions in N,N-dimethyl formamide (DMF) and N-methyl-2-pyrrolidone (NMP) on gold interdigitated electrodes (IDE). The electrical properties of DMF-MXenes and NMP-MXenes films are characterized by impedance spectroscopy (4 Hz - 8 MHz at 1 V) using gold IDE with 25 µm gap. The electrical conductivity of MXene films decreases with increasing spin coating speed from 300 to 900 rpm. The series resistance (Rs) and double layer capacitance remain similar (Cdl). In all cases, MXenes deposited from DMF have five orders of magnitude higher electrical conductivity (lower Rct) than MXene films deposited from NMP. It is correlated with the thin film morphology obtained by scanning electron microscopy (SEM). These findings can be useful for possible application of MXenes as charge transport layers in hybrid photovoltaic devices.

Keywords: MXene, thin films, impedance spectroscopy, electrical conductivity, spin coating

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