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Exfoliation and Analysis of Large-area, Air-Sensitive Two-Dimensional Materials
Published on: January 5, 2019
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Liquid-Exfoliated 2D Materials for Optoelectronic Applications.
Fuad Indra Alzakia1, Swee Ching Tan1
1Department of Materials Science and Engineering, National University of Singapore, 9 Engineering drive 1, Singapore, 117574, Singapore.
Summary
Liquid exfoliation produces two-dimensional (2D) materials for low-cost, flexible photodetectors. This review covers 2D material photodetector fabrication, mechanisms, and future improvements for wearable electronics.
Area of Science:
- Materials Science
- Nanotechnology
- Optoelectronics
Background:
- Two-dimensional (2D) materials possess unique properties making them suitable for electronics and optoelectronics.
- Liquid exfoliation is a cost-effective method for large-scale production of 2D nanosheets.
- 2D material-based photodetectors offer advantages like flexibility and low cost for wearable devices.
Purpose of the Study:
- To review recent advancements in metal-semiconductor-metal (MSM) photodetectors using liquid-exfoliated 2D materials.
- To discuss hybrids and mixtures of 2D materials with other photosensitive nanomaterials.
- To explore strategies for enhancing photodetector performance.
Main Methods:
- Review of liquid exfoliation techniques for 2D materials.
- Analysis of size selection methods for 2D nanosheets.
- Examination of photodetection mechanisms in 2D nanosheet networks.
Main Results:
- Liquid-exfoliated 2D materials enable fabrication of high-performance photodetectors.
- Hybrids with quantum dots, nanowires, and nanorods show promising results.
- Percolating networks of 2D nanosheets are key for device functionality.
Conclusions:
- Liquid exfoliation offers a viable route for scalable 2D material production for photodetectors.
- Further research into material combinations and device optimization can significantly improve performance.
- These advancements pave the way for next-generation flexible and wearable optoelectronic devices.
