半球凹坑表面玻璃基片在薄膜电池中的陷光应用  

Glass Substrate with Hemisphere Pits Surface for Light Trapping in Thin Film Solar Cells

作　　者：钟建平[1] 王庆康[1] 

机构地区：[1]上海交通大学微纳科学技术研究院,上海200240

出　　处：《光学学报》2013年第2期278-283,共6页Acta Optica Sinica

基　　金：国家863计划(2011AA050518);国家973计划(2012CB934302);上海市科委项目(11DZ2290303)资助课题

摘　　要：研究了一种新颖的具有紧密型半球凹坑阵列表面结构的玻璃基片。运用严格耦合波分析(RCWA)方法研究了此玻璃基模型在光垂直入射条件下的透射衍射,数值结果表明此类玻璃基片可以有效地衍射光线。当结构周期在2.6μm附近时,玻璃基片在长波段(0.6～0.8μm)具有较高的雾度。为了改善薄膜电池的陷光效果,考虑将此玻璃基片运用到非晶硅薄膜太阳能电池结构中,数值结果表明与平板结构薄膜太阳能电池相比,当结构周期为2.6μm时,光垂直入射条件下非晶硅薄膜结构在0.3～0.8μm波段平均吸收率提高18.7%,在0.6～0.8μm波段吸收率提高17.9%～77.7%。Glass substrate with novel compact hemisphere pits surface structure is studied. Based on rigorous coupled wave analysis （RCWA）, the diffraction of the structured glass substrate is thematically calculated. It is found that this kind of glass substrate can effectively diffract the normal incident light. It has high haze when the period is around 2.6 μm with long wavelengths of 0.6-0.8μm. This glass substrate is utilized in thin film solar cells for light trapping in our simulation. Compared with flat thin film structure, the average absorption is enhanced by 18.7% within 0.3-0.8 μm and the absorption is enhanced by 17.9 % - 77.7 % within 0.6 - 0.8 μm bandwidth for the structure with a period of 2.6 μm under normal illumination.

关 键 词：薄膜 薄膜太阳能电池 光子晶体 陷光 衍射 

分 类 号：TK513[动力工程及工程热物理—热能工程]