材料科學(xué)與工程 材料物理與化學(xué)，外文文獻(xiàn)翻譯及原文

Multiscaled hierarchical nanostructures for enhancing the conversion efficiencyof crystalline silicon solar cells

提高晶體硅太陽能電池轉(zhuǎn)化效率的多尺度多層次納米結(jié)構(gòu)

a b s t r a c tHigh-performance antireflection structure is critical for enhancing the conversion efficiency of solar cells.One of the most effective antireflection techniques for solar cells is the introduction of nanostructuresto the cells. In this work, we prepared multiscaled hierarchical Er-doped ZnO nanostructures on theplasma enhanced chemical vapor deposited silicon nitride-coated texturized single crystalline siliconsolar cells for antireflection. The multiscaled hierarchical Er-doped ZnO nanostructures were needle-likenanotip arrays, and they were grown using the hydrothermal method. The dependence of microstruc-ture and antireflection performance of the multiscaled hierarchical Er-doped ZnO nanostructures on thegrowth time were studied. It was shown that longer growth time resulted in greater length and diameterfor the Er-doped ZnO nanostructures. For longer growth time, the needle-like tips of the multiscaledhierarchical Er-doped ZnO nanostructures were found to transform to flat tops, which greatly degradedtheir antireflection performance. An optimal growth time for the multiscaled hierarchical Er-doped ZnOnanostructures was determined, and a large enhancement in the photovoltaic performance of sc-Si solarcells was resulted.