为了在理想的光频范围内扩展硅太阳能电池的低反射特性，设计了一种由球型微纳米颗粒周期排列构成的光学微结构。利用球型微纳米颗粒结构表面良好的抗反射特性，扩展硅基太阳能电池的超低反射特性。首先采用Mie散射理论研究了单个球型硅颗粒的散射特性；进而使用MEEP仿真软件通过控制变量法分析了多个颗粒构成的周期性二维光学微结构的光反射特性，分析了球型微纳米颗粒的周期数、半径、间距对反射率的影响。结果表明：合理选择球形颗粒的半径、间距以及周期数构成合适的周期性二维光学微结构，可以在理想的光频范围内获得超低反射特性。

In order to expand the low reflective properties of silicon solar cells in a perfect frequency range, a kind of optical microstructures composed of period arranged spherical silica particle was designed. The excellent anti-reflective property of optical micro/nano-structure was used to expand the ultra-low reflective property of silicon solar cells. First, the scattering property of a single spherical silica particle was studied using Mie scattering theory. Then, the reflective property of periodic two-dimensional optical micro-structures composed of multiple particles was analyzed by simulation software "MEEP". The results of the simulation demonstrate that when the radius, spacing and periodic number of spherical particles are reasonably selected, the ultra-low reflection will occur in a perfect frequency range.