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Application of Titanium-Carbide MXene-Based Transparent Conducting Electrodes in Flexible Smart Windows
Sunil Kumar1,2, Dongwoon Kang1, Van Huy Nguyen1
1Department of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul 05006, South Korea.
ACS Applied Materials & Interfaces
|August 19, 2021
Summary
Titanium carbide MXene (Ti3C2Tx) shows promise for flexible transparent conducting electrodes (TCEs). Annealing improves adhesion, and these TCEs enable high-performance flexible smart windows with excellent optical and electrical properties.
Area of Science:
- Materials Science
- Nanotechnology
- Optoelectronics
Background:
- MXenes, particularly Ti3C2Tx, are emerging as promising materials for transparent and flexible electronic devices due to their unique properties.
- Transparent conducting electrodes (TCEs) are crucial components in various optoelectronic applications, but traditional materials often lack flexibility or are costly.
Purpose of the Study:
- To investigate the potential of Ti3C2Tx MXene as a flexible transparent conducting electrode (TCE).
- To fabricate and characterize flexible smart windows using MXene-based TCEs.
Main Methods:
- Ti3C2Tx MXene films were prepared by spin-coating on PET substrates and annealed at moderate temperatures.
- The electrical, optical, stability, and flexibility properties of the MXene TCEs were evaluated.
- Polymer dispersed liquid crystal (PDLC) smart windows were fabricated using the developed MXene TCEs.
Main Results:
- Annealing significantly improved MXene adhesion to PET substrates.
- The fabricated TCEs demonstrated a sheet resistance of ~424 Ω/sq. and ~87% transmittance.
- The MXene TCEs exhibited good aging stability (~30% resistance change over 28 days) and excellent flexibility (1.5% resistance change after 1000 bending cycles).
- MXene-based flexible smart windows showed low threshold voltage (<10 V), high transmittance (~80% at 60 V), and maintained functionality under bending.
Conclusions:
- Ti3C2Tx MXene is a viable material for creating high-performance, flexible transparent conducting electrodes.
- The developed MXene-based flexible smart windows offer excellent optical switching and mechanical durability, paving the way for advanced flexible display technologies.
