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Scalable Solution-processed Fabrication Strategy for High-performance, Flexible, Transparent Electrodes with Embedded Metal Mesh
Published on: June 23, 2017
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Large-Area Highly Conductive Transparent Two-Dimensional Ti2CTx Film
Yajie Yang1, Sima Umrao1, Shen Lai1
1SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University (SKKU) , Suwon 440-746, Korea.
The Journal of Physical Chemistry Letters
|February 4, 2017
Summary
We developed a scalable dip-coating method for fabricating transparent conductive thin films using titanium carbide (Ti2CTx) MXene flakes. This method achieves excellent conductivity and transmittance, showing promise for transparent electrode applications.
Area of Science:
- Materials Science
- Nanotechnology
- Condensed Matter Physics
Background:
- Transparent conductive films (TCFs) are crucial for optoelectronic devices.
- MXenes, particularly Ti2CTx, offer potential as TCF materials due to their unique properties.
- Scalable and cost-effective fabrication methods for high-performance TCFs are needed.
Purpose of the Study:
- To develop a simple and scalable method for fabricating homogeneous transparent conductive thin films of Ti2CTx.
- To characterize the structural and electrical properties of the fabricated films.
- To enhance the performance of Ti2CTx films through post-fabrication treatment.
Main Methods:
- Dip coating of Al2O3 substrates in a colloidal solution of large-area Ti2CTx thin flakes.
- Characterization using scanning electron microscopy (SEM) and atomic force microscopy (AFM).
- Thickness tuning and property enhancement via SF6+Ar plasma treatment.
Main Results:
- Wafer-scale homogeneous Ti2CTx thin films (approx. 5 nm) were successfully fabricated.
- The films exhibited a sheet resistance of 70 Ω/sq with 86% transmittance (FOM of 40.7).
- Plasma treatment reduced resistivity to 63 Ω/sq, improved transmittance to 89%, and increased FOM to 51.3.
Conclusions:
- The dip-coating method provides a scalable route to high-quality Ti2CTx transparent conductive films.
- Plasma treatment is an effective method for optimizing the performance of Ti2CTx films.
- Ti2CTx films show significant potential for application as transparent conductive electrodes.
