基于二维光子晶体的宽带高吸收太阳能吸收器  

High Absorption Broadband Solar Energy Absorber Based on Two-Dimensional Photonic Crystal

作　　者：孙大伟[1] 李长红[1] 易凌俊 王再鹏 Sun Dawei;Li Changhong;Yi Lingjun;Wang Zaipeng(The College of Electronic Information,Qingdao University,Qingdao,Shandong 266071,China)

机构地区：[1]青岛大学电子信息学院,山东青岛266071

出　　处：《光学学报》2021年第5期109-116,共8页Acta Optica Sinica

基　　金：国家自然科学基金(61307050,61701271);山东省自然科学基金(ZR2016AM27)。

摘　　要：具有宽带高吸收特性的吸收器是太阳能利用的关键。设计了一种含有抗反射层的基于二维光子晶体结构的太阳能吸收器,其中砷化镓(GaAs)作为吸收介质,被填充到具有四方晶格结构的二维光子晶体的钨(W)基底圆形空腔中。采用有限元法进行了模拟计算分析,结果表明,在300~2500 nm的波长范围内,吸收器的平均吸收率为92.5%,有效吸收率高达94.9%,入射仰角为50°时,有效吸收率仍有90.13%。该结构具有全太阳光谱高吸收、偏振不敏感和广角吸收等特点。研究结果为高性能太阳能吸收器的设计提供了参考。The absorber with broadband and high absorption is the key for the utilization of solar energy.We designed a solar absorber based on a two-dimensional photonic crystal structure including an antireflective layer,in which Gallium arsenide(GaAs)is used as the absorbing medium and filled in the tungsten(W)-based circular empty cavity of two-dimensional photonic crystal with tetragonal lattice.The finite element method is used for the simulation and calculation,and the results show that in the wavelength range of 300--2500 nm,the average absorptivity of the absorber is 92.5%and the effective absorptivity is up to 94.9%.Moreover,the effective absorptivity of the absorber is 90.13%when the incident angle is 50°.The proposed structure has the characteristics of high absorption in the full solar spectrum,polarization-insensitivity and wide-angle absorption.These research results can provide a certain reference for the high-performance solar absorber.

关 键 词：材料 太阳能吸收器 二维光子晶体 抗反射膜 吸收谱 全太阳光谱 

分 类 号：O436[机械工程—光学工程]