氧化锌纳米线耦合硅金字塔微纳复合结构的制备及其自清洁特性研究

发布时间：2018-03-06 07:48

本文选题：硅金字塔　切入点：氧化锌纳米线　出处：《物理学报》2017年09期 　论文类型：期刊论文

【摘要】：光伏器件粉尘堆积伴随的遮光效应极其严重,可导致太阳能电池的光电转换效率降低一半以上,这是任何其他提高光伏器件性能的高新技术所不能弥补的.本文根据Cassie-Baxter理论构建出一种基于光伏器件应用的超疏水自清洁微纳复合结构,即氧化锌纳米线耦合硅金字塔.通过调控硅金字塔的尺寸和均匀性,使其尺寸效应不被遮盖以符合存在微米构型的疏水要求,同时尽量不破坏硅光伏器件绒面的减反性能.本文采用水热法在金字塔表面生长氧化锌纳米线的方案,通过系统的实验设计,首次成功地制备了符合光伏器件应用的接触角高达154?,且接触角滞后小于10?的超疏水自清洁微纳复合结构.此外,我们不仅发现硅金字塔的刻蚀存在"高温促进硅金字塔刻蚀"的温度效应和硅金字塔顶部有"圆润-方正-圆润"的时间效应,还从物理上对高温促进刻蚀、晶体的各向异性刻蚀导致的硅金字塔和我们所制备的氧化锌纳米线耦合硅金字塔复合结构的陷光效应等进行了比较充分的分析.
[Abstract]:The photovoltaic device dust accumulation is accompanied by the extremely serious shading effect, which can reduce the photovoltaic conversion efficiency of solar cells by more than half. In this paper, based on the Cassie-Baxter theory, a super-hydrophobic self-cleaning micro-nano composite structure based on photovoltaic device application is constructed, which can not be compensated by any other new technology that can improve the performance of photovoltaic devices. That is, zinc oxide nanowires are coupled to silicon pyramids. By controlling the size and uniformity of silicon pyramids, the size effect is not covered to meet the hydrophobic requirements of micron configurations. At the same time, the anti-reflection performance of silicon photovoltaic devices is not destroyed. In this paper, zinc oxide nanowires are grown on the pyramidal surface by hydrothermal method. For the first time, the contact angle of photovoltaic devices is as high as 154? And the contact angle lag is less than 10? In addition, we not only found that there is a temperature effect of "high temperature promoting silicon pyramid etching" and the time effect of "round square square regular round" on the top of silicon pyramid is not only found in the etching of silicon pyramid, but also in the structure of superhydrophobic self-cleaning micro-nano composite structure. The effect of the silicon pyramid induced by the high temperature etching, the anisotropic etching of the crystal and the ZnO nanowire coupled silicon pyramid composite structure prepared by us are also analyzed.
【作者单位】：天津工业大学理学院;中国科学技术大学物理学院;
【基金】：国家自然科学基金(批准号:11504264)资助的课题~~
【分类号】：TB383.1;TM914.4

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