How electron spectroscopy measures exciton ’holes’

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An ultra-short flash of light breaks the bond between the electron (red) and the
An ultra-short flash of light breaks the bond between the electron (red) and the hole (blue), enabling research on charge-transfer processes in atomically thin semiconductors. Photo: Lukas Kroll, Jan Philipp Bange, Marcel Reutzel, Stefan Mathias

Researchers gain insights into charge transfer at atomically thin interfaces between semiconductors.

Semiconductors are ubiquitous in modern technology, working to either enable or prevent the flow of electricity. In order to understand the potential of two-dimensional semiconductors for future computer and photovoltaic technologies, researchers from the Universities of Göttingen, Marburg and Cambridge investigated the bond that builds between the electrons and holes contained in these materials. By using a special method to break up the bond between electrons and holes, they were able to gain a microscopic insight into charge transfer processes across a semiconductor interface. The results were published in Science Advances. ...

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