Twisting The Angle Brings New Possibilities For Ultra-Thin 2D Materials

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Researchers discovered how twisting the angle between ultra-thin layers correctly can convert the photoelectric effect in materials.

There have been a lot of advancements in solar cell technologies. Solar cells consist of ultra-thin layers cascaded that convert sunlight to electricity. This new class of ultra-thin 2D materials are 100,000 times thinner than a single sheet of paper and could be used in a huge range of technology, including solar cells, LED lights and sensing devices.

Researchers from the Australian National University have demonstrated how 2D materials that convert sunlight into electricity can be controlled via simply twisting the angle between two ultra-thin layers correctly.

These 2D materials often come in pairs. In this study, two different 2D materials are stacked together to move positive and negative charges in opposite directions, generating electricity. 

Lead author of the report Mr Mike Tebyetekerwa says, “This study essentially provides a bit of a how-to guide for engineers. We’re looking at 2D materials that have just two atom-thin layers stacked together. This unique structure and large surface area make them efficient at transferring and converting energy.”

Co-author Dr Hieu Nguyen says, “”It’s an exciting new field. Simply twisting the two ultrathin layers can dramatically change the way they work. The key is to carefully select the matching pair and stack them in a particular way.”

The study has been published in the journal Cell Reports Physical Science.


 

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