光学微透镜阵列曲面的精密镜面磨削及其光伏特性研究

发布时间：2018-04-19 05:04

本文选题：微透镜阵列曲面 + 光伏玻璃基板　；参考：《华南理工大学》2015年硕士论文

【摘要】：微透镜阵列结构和宏观曲面的组合可以综合微光学和宏观光学的光学特性。因此,设想在薄膜太阳能电池的光伏玻璃表面加工出微透镜结构曲面,探索新的光伏性能。但是,脆性玻璃的微加工困难,所以提出了一种将精密修整的金刚石砂轮微型尖端复制到光伏玻璃基板上的塑性域去除的微磨削方法。首先,对微透镜阵列曲面的可见光吸收率进行微光学分析,优化微结构尺寸;其次,对光伏玻璃基板的塑性域去除以及微磨削参数对表面粗糙度的影响进行了实验分析;然后,建立了微透镜阵列曲面的检测模型,评价微结构微观尺度误差和宏观曲面误差;最后,对微透镜阵列曲面的光伏特性进行应用研究。实验结果表明,微结构的精密磨削和塑性域镜面磨削工艺依赖于精密修整的砂轮微型尖端及其表面分布的微金刚石磨粒颗粒。在微磨削中,进给速度和零磨削次数分别是影响微透镜阵列曲面的镜面加工和精密加工的主要因素。微结构误差和曲面误差分别达到为6.7?m和10.3?m;其表面粗糙度达到27 nm。在薄膜太阳能电池的光伏玻璃基板的应用中,微透镜阵列曲面可以在散射光条件下提高实验室测试的光电转换效率3.4?10.6%,而且,一个惊人的发现是,在晴天和多云下可以分别提高发电量约260%和419%,另外,阴天的发电能力比晴天的更强,这是因为微透镜阵列曲面吸收周围散射光然后均匀分散到电池薄膜上。
[Abstract]:The combination of microlens array structure and macroscopic surface can integrate the optical properties of micro optics and macro optics.Therefore, it is envisaged that microlens surface can be fabricated on the surface of photovoltaic glass of thin film solar cells to explore new photovoltaic properties.However, the micro-machining of brittle glass is difficult, so a micro-grinding method is proposed to remove the plastic domain of precision dressing diamond grinding wheel by copying the micro-tip of diamond grinding wheel to photovoltaic glass substrate.Firstly, the visible light absorptivity of the surface of the microlens array is analyzed by microoptics to optimize the size of the microstructure; secondly, the plastic domain removal of the photovoltaic glass substrate and the effect of the micro-grinding parameters on the surface roughness are analyzed experimentally.The detection model of micro lens array surface is established to evaluate the micro scale error and macro surface error. Finally, the photovoltaic characteristics of micro lens array surface are studied.The experimental results show that the precision grinding of micro structure and the mirror grinding in plastic domain depend on the fine dressing grinding wheel micro tip and its surface distribution of micro diamond abrasive particles.In micro grinding, feed speed and zero grinding times are the main factors that affect the mirror surface processing and precision machining of micro lens array surface, respectively.The microstructure error and surface error are 6.7 m and 10.3 m, respectively, and the surface roughness is 27 nm.In the application of photovoltaic glass substrates for thin film solar cells, the surface of the microlens array can improve the photovoltaic conversion efficiency of the laboratory tests under the condition of scattering light, and a surprising finding is that,The power generation can be increased by about 260% and 419% under sunny and cloudy conditions respectively. In addition, the generation capacity in cloudy days is stronger than that in sunny days, because the surface of the microlens array absorbs the scattered light around it and distributes it evenly over the thin film of the cell.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ171.6

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