利用光散射与导模共振的理论，设计了一种薄膜太阳能电池的陷光结构，对硫属化合物薄膜太阳能电池进行了优化设计，选择多孔氧化铝薄膜（PAA）作为散射层，模型结构层厚度为：窗口层（AZO）320 nm，缓冲层（In2S3）65 nm，吸收层（SnS）660 nm。研究结果表明，光散射与导模共振相结合的薄膜太阳能电池结构能够提高自身的光吸收率，其中由光散射结构提高的全光谱吸收率约为3%。本设计可以优化薄膜太阳能电池的吸收光谱，提高其对近红外波段的光吸收能力，在波长950 nm位置的吸收率达到85%，增强了薄膜太阳能电池的光利用率。

A light trapping structure of solar cell is proposed by the theory of light scattering and guided mode resonant. The porous anodic alumina (PAA) is used as a scattering layer. The thicknesses of the model are: window layer (AZO) is 320 nm, buffer layer (In2S3) is 65 nm and absorbing layer (SnS) is 660 nm. The simulated and experimental results show that the absorption of solar cell structure can be enhanced by light scattering and guided mode resonant. The absorption is enhanced by about 3% by the light scattering structure. This design can optimize the absorption spectra of this film solar cell and improve the absorption ability of near-infrared light. The absorption at the wavelength of 950 nm is enhanced to 85%, and the solar energy is better used.