硅纳米颗粒薄膜对硅太阳电池的减反射作用分析

ANALYSIS ON THE ANTIREFLECTION OF SILICON-NANOPARTICLE FILMS AT THE SURFACE OF SILICON SOLAR CELLS

通过光路模拟计算,分析了在硅太阳电池的表面添加一层多孔的硅纳米颗粒薄膜以增加硅太阳电池光吸收的可能性。无论在硅太阳电池封装前还是封装后,硅纳米颗粒的尺寸对光的透过率的影响均很小,孔隙率约为70%的硅纳米颗粒薄膜能最大限度提高光的透过率。在硅太阳电池封装后,硅纳米颗粒薄膜对光的透过率的增强与封装前相比有所削弱。同时考虑了入射光角度变化时硅纳米颗粒薄膜对光的透过率的影响。

We have studied the possibility of enhancing the light absorption of silicon solar cells by forming porous silicon-nanoparticle （Si-NP） films at the solar cell surface. For both unencapsulated and encapsulated silicon solar cells, the size of Si NPs hardly affects the light transmission to the photo-current conversion area. The maximum light absorption enhancement is obtained when the porosity of Si-NP films is about 70%. After solar cell encapsula- tion the light absorption enhancement is weakened. We have also considered the effect of Si-NP films on the light absorption of silicon solar cells as the light incidence angle varies.