Vol. 64 | nr. 1 | Ianuarie - Martie 2016 Articolul 5

Heterostructure nanowires/amorphous thin-film for solar cells
(Full text in English)

Improving the efficiency of photovoltaic conversation is one of the major problems and most important for solar cells. Although silicon is the dominant material used in the photovoltaic industry today, alternative materials, novel concepts and characterization techniques are needed to meet longterm cleanenergy goals. Another way to emerge is that of the thinfilm and nanostructure, wherein the silicon is added or replaced by other more absorptive materials. These cells reduce the massive amount of silicon used and improve their conversion efficiency by the testimony of the effective amount by the introduction of new materials and technologies. Research on implementation of silicon nanowires solar cell was conducted in order to increase the efficiency of this cell. Their integration in solar cells meets the physical miniaturization’s exigencies, quantum confinement and helps improve the theoretical efficiency conversion. They have significant regarding relaxation problem properties, transmission and electronic optical confinement. In this paper, a heterojunction design is produced; it is based on amorphous silicon/silicon nanowires/microcrystalline silicon. This was achieved through modelling and simulation using TcadSilvaco Athena, advanced virtual waferfabrication tool. A model SilvacoTcad Athena silicon nanowires solar cell was created using actual solar cell parameters (such as layer thicknesses, doping levels and material properties) documented in various papers to optimize parameters in order to make a compromise between amelioration conversion efficiency and lowest cost of manufacture.   
Keywords: silicon, nanowires, nanotechnology, simulation, synthesis, solar cell