一种增加光吸收的非晶硅薄膜太阳能电池的设计-发光学报.PDF

第34卷摇 第6期 发摇 光摇 学摇 报 Vol郾34 No郾6 2013年6月 CHINESEJOURNAL OF LUMINESCENCE June,2013 文章编号:1000鄄7032(2013)06鄄0753鄄05 一种增加光吸收的非晶硅薄膜太阳能电池的设计 * 沈宏君 ,张摇 瑞,卢辉东 (宁夏大学 物理电气信息学院,宁夏 银川摇 750021) 摘要:分别设计与优化了非晶薄膜太阳能电池的上表层和电池底部结构,采用严格耦合波方法(RCWA)数 值计算了电池的光吸收。 计算结果表明:在仅考虑TM偏振的情况下,优化后的增透膜与无增透膜相比, 300~840 nm波长范围内的吸收平均提高了35%左右;优化后的背反射器与无背反射器相比,700~840 nm波 长范围内的吸收平均提高了23%左右。 该非晶硅薄膜太阳能电池结构在全角宽频范围内有较高吸收,可以 提高太阳能电池的转化效率。 关摇 键摇 词:增透膜;衍射光栅;光子晶体;吸收;太阳能电池 中图分类号:O431摇 摇 摇 文献标识码:A摇 摇 摇 DOI:10.3788/ fgx0753 Design of An Amorphous Silicon Thin鄄film Sloar Cell with Absorption Enhancement * SHEN Hong鄄jun ,ZHANG Rui,LU Hui鄄dong ( School of Physics and Electrical Information,Ningxia University,Yinchuan750021,China ) *Corresponding Author,E鄄mail:shenhongj2004@126.com Abstract:The front鄄surface and the bottom of amorphous silicon(a鄄Si) thin鄄film solar cell are de鄄 signed respectively. Light absorption is calculated by using the rigorous coupledwave analysis(RC鄄 WA) . InTMpolarization,the absorption of solar cellswith optimizedARcoating can be increased by an average of 35% compared with that without AR coating in the range of 300 ~840 nm. Fur鄄 thermore,the absorption of solar cellswith optimized back reflector can be increased by an average of23% comparedwiththatwithoutbackreflectorintherangeof700~840 nm. Theamorphoussili鄄 con(a鄄Si) thin鄄film solar cell that we design hasbroadband and omnidirectional absorption,so that it can improve the conversion efficiency of solar cells. Key words:antireflection coatings;diffraction gratings;photonic crystals;absorption;solar