中文摘要：

基于频域有限差分法和入射光场在平板型和织构型非晶硅电池内的传输过程,详细分析了Ag背反镜的吸收性质。研究表明：导模振荡吸收和表面等离子体共振吸收是两种电池结构Ag背反镜的主要吸收机制;在长波段,平板型电池结构的导模振荡吸收和表面等离子体共振吸收均较弱,其Ag背反镜的吸收很小（小于3%）,而织构型电池结构可产生较强的导模振荡吸收和表面等离子体共振吸收,其Ag背反镜的吸收较大（某些特殊波长的吸收达50%）;织构型电池结构可有效拓展入射光单程通过有源层被完全吸收的波长范围。

英文摘要：

Based on the frequency finite difference method and the transmission process of the incident light field in the flat and textured amorphous silicon cell,the absorption loss of the Ag back reflector was analyzed in detail.The reseaarch shows：guided mode oscillation absorption and surface plasmon resonance absorption are the main absorption mechanism of Ag back reflector in two kinds of cell structures.In the long wave band,the absorption of guided mode oscillation absorption and the absorption of surface plasmon resonance are weak,and the absorption loss of Ag back reflector is very small（less than 3%）,while the textured soler cell can produce strong guided mode oscillations and absorption of surface plasmon resonance,and the absorption loss of Ag back reflector is relatively large（absorption loss of some special wavelength can reach 50%）;the texture type cell structure can effectively extend absorption of the wavelength range of the incident light one way to through the active layer.