针对应用于薄膜太阳能电池的一种混合陷光结构进行了分析研究，该结构由位于电池正面的电介质颗粒和位于电池背面的金属颗粒构成.运用有限时域差分法模拟分析了正面电介质颗粒与背面金属颗粒对光吸收增强的不同作用范围.运用电场图分析了其对光吸收增强的机制，包括两种颗粒的散射作用和金属纳米颗粒的表面等离子体近场增强作用.分别优化了正面电介质颗粒和背面金属颗粒的材料、大小等参量，获得了一种优化后的混合陷光结构.实验表明带有这种混合陷光结构的电池短路电流密度相对于参考电池提高了30.3%，该方法为提高薄膜太阳能电池效率提供了新思路.

In this paper, a kind of hybrid light trapping structures in thin film crystalline silicon solar cells, combined of dielectric nanoparticles on the front and metal nanoparticles on the rear, was reported. Numerical simulations were performed based on the finite-difference time-domain solutions, and the wavelength ranges that the dielectric nanoparticles and metal nanoparticles had impact on, were systematically analyzed. The absorption enhancement mechanisms were shown through the electric filed figures, including the scattering of these two kinds of nanoparticles, and the near field enhancement of surface plasmons excited by the metal nanoparticles. Simulation-based optimizations of the periods and sizes of Ag, TiO2 etc nanoparticles were given. Furthermore, a 30.3% increase in the short circuit current density was obtained in a solar cell with the optimized hybrid light trapping structure. This structure, combined of the different nanoparticles with different locations, is a new way to improve the conversion efficiency of thin film solar cells.