太阳能分光发电系统的光学薄膜滤波片设计与仿真  

Optical Thin Film Filters Design and Simulation for Spectral Separation of Solar Power System

作　　者：聂晶[1] 刘文[1] 王双保[1] 

机构地区：[1]武汉光电国家实验室华中科技大学光电子科学与工程学院,湖北武汉430074

出　　处：《光学与光电技术》2011年第5期12-15,共4页Optics & Optoelectronic Technology

摘　　要：由于不同材料的禁带宽度不同,对太阳光谱的吸收曲线也各不相同,探讨了用等效折射概念设计滤光片的原理和计算方法。针对非晶硅、单晶硅和砷化镓的吸收谱线设计了一组短波通滤光片,滤波片A在波长380～800nm处,平均透射率T〉90%;在波长880～1100nm处截止,平均透射率T〈1%;滤波片B在380～500nm处T〉90%,在波长580～800nm处T〈1%。根据短波通滤光片设计原理,采用TiO_2和SiO_2作为高折射率材料和低折射率材料,基础膜系为（0.5LH0.5L）~s。从理论上计算出这两种材料所需要的周期数以及主膜系,并用镀膜设计软件TFCALC对该膜系进行优化。Materials absorb different specific solar spectrum owing to different band gaps. In this paper, the principle and calculation method with a concept of equivalent refractive index are discussed. We design two short-wavelength pass filters according to the absorption curve of amorphous silicon, Monocrystalline Silicon and GaAs. Filter A shows an average trans- mittance ratio is more than 90~~ at wavelength region 380-800 nm and less than 1.00% at 880--1100 nrrL Filter B shows an average transmittance ratio is more than 90% at wavelength region 380--500 nm and less than 1.00 % at 580-800 nm. Then TiO2 is chosen as the material of high refractive index and SiO2 as the material of low refractive index based on this principle, the basic film system is （0.5LH0.5L）. Periodicity and the main film system of the two materials are theoretically calculated and optimized with coating design software TFCALC.

关 键 词：太阳能发电 单晶硅 砷化镓 非晶硅 吸收谱线 短波通滤光片 周期膜系 

分 类 号：O484[理学—固体物理]