非晶硅太阳电池用Ag背反镜的吸收损耗  

Absorption Losses of Ag Back Reflector Using in a-Si Solar Cells

作　　者：陆晓东[1] 王泽来[1] 宋扬[1] 赵洋[1] 张金晶[1] 

机构地区：[1]渤海大学新能源学院,锦州121000

出　　处：《人工晶体学报》2016年第3期661-666,共6页Journal of Synthetic Crystals

基　　金：国家重点基础研究发展计划(973计划)(2010CB933804);国家自然科学基金(11304020);辽宁省教育厅一般项目(L2012401)

摘　　要：利用频域有限差分法,分析了两种典型非晶硅电池结构的Ag背反镜的吸收损耗。研究表明:平板型非晶硅电池Ag背反镜的损耗主要是由银材料的本征吸收和非晶硅有源层导模共振效应引起,而表面等离子体共振吸收使TM模的吸收峰峰值大于TE模的吸收峰峰值;织构型的非晶硅电池内部光场分布复杂,可在光垂直入射情况下,使TE模和TM模均在有源层中出现较强的导模共振效应,且TM模还可在Ag背反镜中激励起等离子体共振效应,从而使织构型非晶硅电池Ag背反镜的吸收谱表现为多峰值特性,且其吸收峰的峰值大于平板型非晶硅电池的吸收峰峰值。The absorption losses of Ag back reflector mirrors using in two typical a-Si cell structures were analyzed by using the frequency domain finite difference method. Results show that the absorption losses of Ag back refelctors in flat a-Si solar cells are mainly caused by the intrinsic absorption of Ag material and the resonance effects of guided modes in a-Si active layers and the absorption peaks of TM-polarized light generated by the resonance absorption of surface plasma will be larger than those of TE-polarized light; the distributions of light in a-Si cells by textured surface structures are very complex and the strong resonance effects of guided modes for both TE- and TM-polarized light can be created in a-Si active layers under the condition that light is normally incident on a-Si cells; the resonance effects of surface plasma in the Ag back reflectors of textured a-Si solar cells,which can be excited by TM-polarized light,will make the absorption spectrum emerge many absorption peaks and these absorption peaks are larger than those in flat a-Si solar cells.

关 键 词：非晶硅太阳电池 背反射镜 吸收损耗 频域有限差分法 

分 类 号：TM914.4[电气工程—电力电子与电力传动]