基于等效介质理论的光伏电池亚波长光栅减反结构设计  

DESIGN OF ANTIREFLECTION STRUCTURE OF PHOTOVOLTAIC CELLS WITH SUB-WAVELENGTH GRATING BASED ON EMT

作　　者：马佑桥[1] 周骏[1] 孙铁囤 邸明东[3] 丁海芳[1] 

机构地区：[1]宁波大学理学院光电子技术研究所,宁波315211 [2]常州亿晶光电科技有限公司,金坛213223 [3]江苏大学机械工程学院光信息科学与技术系,镇江212013

出　　处：《太阳能学报》2010年第10期1353-1358,共6页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(60977048);宁波市自然科学基金(2008A610001);江苏大学-常州亿晶光电科技有限公司联合研发项目

摘　　要：根据等效介质理论(EMT),利用薄膜特性矩阵方法提出了等效介质膜模型,用以研究亚波长光栅减反特性。运用遗传算法分析入射光偏振态和光栅结构参数对亚波长光栅反射率的影响,获得了特定波段下复周期亚波长光栅较低的平均反射率。此外,以TCO/a-Si:H(n)/a-Si:H(i)/c-Si:H(p)/Ag光伏电池为例,将其表面透明导电层(TCO)设计为复周期亚波长光栅结构,利用AFORS_HET软件模拟分析光伏电池的光谱响应,结果表明,复周期亚波长光栅的减反特性可以显著提高光伏电池的量子效率。According to the equivalent medium theory, and using thin-film characteristic Matrix, the model of equivalent dielectric film has been put forward to study the anti-reflection features of sub-wavelength grating. The retlectivity of sub- wavelength grating is analyzed in detail by means of genetic algorithm for different polarized states of incident light and grating structural parameters, and the lower average reflectivity of complex-cycle sub-wavelength grating is gotten in a specific wavelength band. Furthermore, for the photovoltaic cells structure of TCO/a-Si： H（n）/a-Si ： H（i）/c-Si： H（p）/ Ag, its surface transparent conductive Oxide layer （TCO） is designed into the complex-cycle sub-wavelength grating structure. The optical response of photovoltaic cells has been analyzed with the software AFORS HET. And the simulation analysis show that anti-reflection features of complex-cycle sub-wavelength grating can significantly improve the quantum efficiency of photovohaic cells.

关 键 词：等效介质理论 亚波长光栅 介电常数 遗传算法 光伏电池 

分 类 号：TM615[电气工程—电力系统及自动化]