Surface Recombination Velocity Measurements of Efficiently Passivated Gold-Catalyzed Silicon Nanowires by a New Optical Method

摘要: The past decade has seen the explosion of experimental results on nanowires grown by catalyzed mechanisms. However, few are known their electronic properties especially influence surfaces and catalysts. We demonstrate an optical method how a curious electron−hole thermodynamic phase can help to characterize volume surface recombination rates silicon (SiNWs). By studying liquid dynamics as function spatial confinement, we directly measured these two key parameters. velocity passivated SiNWs 20 cm s−1, 100 times lower than previous values reported. Furthermore, rate gold-catalyzed is found be similar that high-quality three-dimensional crystal; catalyst negligible. These advance knowledge SiNW passivation provide essential guidance development efficient nanowire-based devices.