Correlated optical and structural analyses of individual GaAsP/GaP core-shell nanowires.

08:00 EDT 9th April 2019 | BioPortfolio

Summary of "Correlated optical and structural analyses of individual GaAsP/GaP core-shell nanowires."

We report on the structural and optical properties of GaAs<sub>0.7</sub>P<sub>0.3</sub>/GaP core-shell nanowires (NWs) for future photovoltaic applications. The NWs are grown by self-catalyzed molecular beam epitaxy. Scanning transmission electron microscopy (STEM) analyses demonstrate that the GaAsP NW core develops an inverse-tapered shape with a formation of an unintentional GaAsP shell having a lower P content. Without surface passivation, this unintentional shell produces no luminescence because of strong surface recombination. However, passivation of the surface with a GaP shell leads to the appearance of a secondary peak in the luminescence spectrum arising from this unintentional shell. The attribution of the luminescence peaks is confirmed by correlated cathodoluminescence and STEM analyses of the same NW.


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Name: Nanotechnology
ISSN: 1361-6528


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