3C–SiC nanowires luminescence enhancement by coating with a conformal oxides layer

In this work, we report the light emission properties of different classes of 3C–SiC nanowires. We compare the luminescence of core/shell nanowires where the 3C–SiC core is covered by a SiOx shell of different thickness, or coated with different conformal oxide layers (aluminium oxide and gallium oxide), grown by atomic layer deposition. The main result is the enhancement of the 3C–SiC near-band-edge emission at room temperature with the nanowires surface coating, due to carrier's diffusion from the shell to the core, promoted by the alignment between the oxides and SiC bands in a type I quantum-well.