SiO₂微孔薄膜耦合ZnO纳米棒的FDTD模拟研究

The Simulation Study of SiO₂ Mesoporous Films Coupled with ZnO Nanorods Using the FDTD Method

摘要: 为了应对能源枯竭和环境污染这一关乎人类生存的重要问题，太阳能电池是利用太阳能这一低廉并且对环境友好的清洁能源的有效手段。但是光伏器件易受灰尘、粉尘等固体微颗粒污染物的影响，从而大大减少光电转化效率，因此在光伏器件表面引入超疏水自清洁薄膜则成为一种潜在有效的清洁手段。基于前人研究并参考“荷叶表面微观结构”，提出了一种具有高透光的SiO₂微孔膜耦合ZnO纳米棒的分级自清洁结构，通过FDTD方法对设计的薄膜结构进行相应的数值模拟，得到了三组透过率、反射率和吸收率等数据曲线，以及膜结构内部不同截面的电场分布。从模拟结果来看，该膜结构在微纳分级复合结构保证超疏水性的同时，具有优异的光学性能和极强的推广可行性。

Abstract: To address the critical issue of energy depletion and environmental pollution that threatens human survival, solar cells represent an effective means of harnessing solar energy, a low-cost and environmentally friendly clean energy source. However, photovoltaic devices are susceptible to the influence of solid particulate pollutants such as dust and powder, which can significantly reduce their photoelectric conversion efficiency. Therefore, introducing a superhydrophobic self-cleaning film on the surface of solar panels has become a potentially effective cleaning solution. Based on previous research and inspired by the microstructure of lotus leaf surfaces, we propose a hierarchical self-cleaning structure composed of a highly transparent silica microporous film coupled with zinc oxide nanorods. The designed film structure was numerically simulated using the FDTD method, yielding three sets of data curves for transmittance, reflectance, and absorptance, as well as the electric field distribution at different cross-sections within the film structure. The simulation results indicate that the film structure maintains super-hydrophobicity through its micro-nano hierarchical composite structure while exhibiting excellent optical properties and strong feasibility for widespread application.