级联式宽谱域高反射一维光子多晶体(1D PMC)研究设计  

DESIGN OF ONE DIMENSION CASCADE PHOTONIC MULTI-CRYSTAL(1D PMC)WITH BROADBAND HIGH-REFLECTIVITY

作　　者：陈培专[1] 侯国付[1] 索松 倪牮[1] 张建军[1] 张晓丹[1] 赵颖[1] 

机构地区：[1]南开大学光电子薄膜器件与技术研究所,光电子薄膜器件与技术天津市重点实验室,光电信息技术科学教育部重点实验室,天津300071

出　　处：《太阳能学报》2015年第10期2319-2324,共6页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(61176060;61377031);天津市自然科学基金重点项目(12JCZDJC28300);国家高技术研究发展(863)计划(2011AA050503);国家重点基础研究发展(973)计划(2011CBA00705;2011CBA00706;2011CBA00707);天津市重大科技支撑计划(11TXSYGX22100)

摘　　要：研究并制备一种可用作硅基薄膜太阳电池背反射器的新型一维光子多晶体（1DPMC）。该1DPMC由两种不同周期厚度的一维子光子晶体（Pc）级联形成，其在500—1200nm波段内的平均反射率达到98．6％，适用于非晶硅单结、非晶硅／微晶硅双结、非晶硅月E晶硅锗，微晶硅三结等各种类型硅基薄膜太阳电池的背反射器。两种不同周期厚度的子Pc均由高折射率的a-si层和低折射率的SiOx层周期性交叠构成。通过a-si层厚度的调控，可方便地调整不同周期厚度光子晶体的高反射区域和带宽。研究表明：为了获得宽谱域高反射1DPMC，应将在禁带范围内存在吸收的子PC置于无吸收子PC上面。A novel one dimension photonic multi-crystal （1D PMC） for back reflector of silicon film solar cell was investigated and fabricated, which was consisted of two one dimension photonic crystal （1D PC） with differing periodic thicknesses in cascade. The average reflectance over 98.6% could be achieved in a broad wavelength range from 500 to 1200 nm for such a configuration, thus could be used as high-performance back reflector for various silicon thin film solar ceils no matter a-Si, a-Si/μe-Si or a-Si/a-SiGe/μe-Si. Two sub-lD PCs with differing periodic thicknesses in 1D PMC were made of overlap bilayers of a-Si （high refractive index） and SiO~ （low refractive index）. The a-Si layer thickness was adjusted to regulate high reflective region and bandgap of each photonic crystal with differing periodic thicknesses. In order to realize broadband highly reflective 1D PMC, it is necessary to place the sub-PC with higher absorption within the forbidden band on top of the other one with lower or without absorption.

关 键 词：硅基薄膜太阳电池 一维光子多晶体 一维光子晶体 宽谱域高反射 

分 类 号：TM914.4[电气工程—电力电子与电力传动]