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Structural origin of light emission in germanium quantum dots

Little, W., Karatutlu, A., Bolmatov, D., Trachenko, K., Sapelkin, A. V., Cibin, G., Taylor, R., Mosselmans, F., Dent, A. J., Mountjoy, Gavin and others. (2014) Structural origin of light emission in germanium quantum dots. Scientific Reports, 4 . Article Number 7372. ISSN 2045-2322. (doi:10.1038/srep07372) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:60092)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. (Contact us about this Publication)
Official URL
http://doi.org/10.1038/srep07372

Abstract

We used a combination of optically-detected x-ray absorption spectroscopy with molecular dynamics simulations to explore the origins of light emission in small (5?nm to 9?nm) Ge nanoparticles. Two sets of nanoparticles were studied, with oxygen and hydrogen terminated surfaces. We show that optically-detected x-ray absorption spectroscopy shows sufficient sensitivity to reveal the different origins of light emission in these two sets of samples. We found that in oxygen terminated nanoparticles its the oxide-rich regions that are responsible for the light emission. In hydrogen terminated nanoparticles we established that structurally disordered Ge regions contribute to the luminescence. Using a combination of molecular dynamics simulations and optically-detected x-ray absorption spectroscopy we show that these disordered regions correspond to the disordered layer a few Å thick at the surface of the simulated nanoparticle.

Item Type: Article
DOI/Identification number: 10.1038/srep07372
Divisions: Faculties > Sciences > School of Physical Sciences
Depositing User: Gavin Mountjoy
Date Deposited: 26 Jan 2017 09:43 UTC
Last Modified: 22 Sep 2020 16:30 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/60092 (The current URI for this page, for reference purposes)
Mountjoy, Gavin: https://orcid.org/0000-0002-6495-2006
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