宽光谱太阳能电池减反表面光谱特性研究

Spectral Features of Broadband Anti-Reflection Structured Surface for Si Solar Cell

本文利用时域有限差分方法,计算了三种不同的渐变折射率的单晶硅太阳能电池减反表面的光谱特性,对三种表面的减反性能进行了对比。讨论了结构参数对结构表面减反特性的影响,研究发现,蛾眼结构的单晶硅太阳能电池在整个太阳辐射光谱范围内具有最低的反射率,随着微结构高度的增加和周期的减小,有效折射率的梯度降低,减反效果更加明显。

This paper calculates the spectral features of three different structured surfaces with graded refractive index for the anti-reflection of Si solar cell with FDTD method.The spectral features of three structured surface are compared.The effects of the structural parameters on the spectral reflection are discussed.It is found that the reflection of moth-eye structured surface is lowest in the full solar spectrum among three structured surfaces.With the increase of height and reduce of period of micro-structure,the gradient of the effective refractive index in z-direction is reduced and the reflection is suppressed more effectively.