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In this work we investigate properties of ultra-narrow photoluminescence lines originating from recombination of excitons trapped by short-range potential fluctuations, caused by alloy disorder in GaAs/GaNAs core/shell nanowires. From power-dependent photoluminescence measurements we show that the emission behavior is consistent with biexciton-exciton cascade recombination in quantum dots. We also...
In this paper we review our recent results on optical properties of coaxial nanowires (NWs) based on dilute nitride alloys, such as GaAsN and GaNP. We show that these structures have a high structural and optical quality, and can potentially be used as polarized nano-scale light sources that emit linearly polarized light with the polarization direction perpendicular to the wire axis even in zinc blende...
We report fabrication of silicon nanohole radial p-n junction solar cells (SCs) using thermal annealing of silver films with metal-catalyzed electroless etching (MCEE). A balanced approach between the cost and controllability of the nanostructure fabrication is used to manufacture the silicon SCs. Based on our experimental results, the size and distribution of the nanoholes can be controlled by varying...
Using hexagonal ordered straight-pore SBA-15 silica as hard template, mesoporous cobalt oxide (Co) nanowires SBA-15 materials are synthesized by a nanoreplication route, and X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), field-emission scanning electron microscopy (FESEM), and physisorption isotherms are used to characterize the microstructure...
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