PROCEEDINGS ARTICLE | March 15, 2016
Proc. SPIE. 9758, Quantum Dots and Nanostructures: Growth, Characterization, and Modeling XIII
KEYWORDS: Photovoltaics, Visible radiation, Solar cells, Luminescence, Crystals, Silicon, Zinc, Scanning electron microscopy, Transmission electron microscopy, Structural design, Chemical elements, Gallium, Arsenic, Molecular beam epitaxy, Thin film growth, Water splitting, Nanowires
Self-catalyzed GaAsP nanowires (NWs) have a band gap that is capable of covering the working wavelengths from green to infrared. However, the difficulties in controlling P and the complexities of the growth of ternary NWs make it challenging to fabricate them. In this work, self-catalyzed GaAsP NWs were successfully grown on Si substrates by solid-source molecular beam epitaxy and demonstrated almost stacking fault free zinc blend crystal structure, Growth of high-quality shell has been realized on the core NWs. In the shell, a quasi-3-fold composition symmetry has been observed for the first time. Moreover, these growth techniques have been successfully applied for growth on patterned Si substrates after some creative modifications such as high-temperature substrate cleaning and Ga pre-deposition. These results open up new perspectives for integrating III−V nanowire photovoltaics and visible light emitters on the silicon platform using self-catalyzed GaAsP core−shell nanowires.
