Abstract
For sustainable energy technologies, MXenes offer unique properties such as high electrical conductivity, hydrophilicity, excellent thermal stability, large interlayer spacing, easily tunable structure, high surface area, and microporous structure that facilitate faster ion transfer. To address limitations of aqueous MXene suspension, Ti3C2-type MXene thin films are prepared from non-aqueous suspensions in N,N-dimethyl formamide (DMF) and N-methyl-2-pyrrolidone (NMP) using solvent exchange method followed by spin coating or drop casting on gold interdigitated electrodes (IDE) and ceramic substrates and their electrical properties are compared. Electrical properties investigated by impedance spectroscopy (4 Hz to 8 MHz) and four-point probe (FPP) measurements show that DMF-MXene layers exhibit higher electrical conductivity than MXene deposited from NMP. The material technology and electrical properties of MXene thin films prepared from non-aqueous solvents may thus be promising for possible use of MXenes in hybrid photovoltaic devices as charge-transporting layers.
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Acknowledgments
The work was financially supported by the MSMT/EU project CZ.02.1.01/0.0/0.0/15_003/0000464 (CAP). This work used the large research infrastructure CzechNanoLab supported by the LM2023051 project. The authors thank Polymer Institute, Slovak Academy of Sciences and Drexel University for MXenes. Technical assistance of Rajisa Jackivova is gratefully appreciated.
Funding
Funding was provided by MSMT/EU (Grant No. CZ.02.1.01/0.0/0.0/15_003/0000464) and by MSMT (Grant No. LM2023051).
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Gutsul, O., Szabo, O., Kumar, N. et al. Electrical properties of MXene thin films prepared from non-aqueous polar aprotic solvents. Journal of Materials Research 38, 3227–3237 (2023). https://doi.org/10.1557/s43578-023-01033-6
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DOI: https://doi.org/10.1557/s43578-023-01033-6