A 'twist' brings new possibilities for ultra-thin 2D materials

Twist brings new possibilities for ultra-thin 2D materials
Credit: The Australian National University

A new study from The Australian National University (ANU) shows how the ability of 2D materials to convert sunlight into electricity can be controlled by simply "twisting" the angle between two ultra-thin layers correctly.

The new class of materials (2D) are 100,000 times thinner than a single sheet of paper and could be used in a huge range of technology, including , LED lights and sensing devices.

However, one material alone has limited applications, so they often come in a pair. Two different 2D materials are stacked together to move positive and in , generating electricity.

Lead author of the report Mr Mike Tebyetekerwa says it opens up exciting opportunities.

"This study essentially provides a bit of a how-to guide for engineers," Mr Tebyetekerwa said.

"We're looking at 2D materials that have just two atom-thin layers stacked together.

"This unique structure and make them efficient at transferring and converting energy."

In 2019 Mr Tebyetekerwa and co-author Dr Hieu Nguyen demonstrated the maximum potential of 2D materials to generate electricity using sunlight.

"It's an exciting new field. Simply twisting the two ultrathin layers can dramatically change the way they work," Dr Nguyen said.

"The key is to carefully select the matching pair and stack them in a particular way."

The study has been published inĀ Cell Reports Physical Science.


Explore further

Scientists unlock the potential of ultra-thin 2-D materials

More information: Mike Tebyetekerwa et al, Twist-driven wide freedom of indirect interlayer exciton emission in MoS2/WS2 heterobilayers, Cell Reports Physical Science (2021). DOI: 10.1016/j.xcrp.2021.100509
Journal information: Cell Reports Physical Science

Citation: A 'twist' brings new possibilities for ultra-thin 2D materials (2021, July 29) retrieved 20 September 2021 from https://phys.org/news/2021-07-possibilities-ultra-thin-2d-materials.html
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