摘要
通过频域叠加设计具有可见光至红外波段全角度禁带的复合结构一维光子晶体背反射板,有效增加了太阳能电池对长波波段光子的吸收.利用平面波展开法和传输矩阵法,分别研究介质填充比对该反射板晶体能带分布的影响,以及光线斜入射时光子禁带边缘平移随介质填充比、晶格常数及周期的变化关系.结果发现,当入射角从0°变化到89°,禁带边缘的波长越大平移越大,周期增加可减弱晶体对角度变化的敏感性,晶格常数是影响完全禁带宽度变化的主要因素.
Since the absorption ratio of the thin-film silicon solar cells is quite low in the range of wavelength 500-1 100 nm, a photonic crystal reflector with omnidirectional forbidden band located in the visible and infrared region was designed by using the frequency domain overlapping. The plane wave expansion method and the transmission matrix method were used to analyze the influence of the medium filling ratio on the photonic bandgap distribution of the reflector and the translation of the bandgap edge as functions of the filling ratio, lattice constants and period num-bers at oblique incidence. The results show that, when the incidence angle is changing from 0° to 89°, the wave-length of the bandgap edge becomes larger in the results of a wider translation range and the increase of the period numbers. It can reduce the reflector’s sensitivity to the angles. The lattice constant is the main factor influencing the＆amp;nbsp;change of the bandwidth.
出处
《深圳大学学报（理工版）》
EI
CAS
北大核心
2014年第5期498-503,共6页
Journal of Shenzhen University(Science and Engineering)
基金
国家自然科学基金资助项目(61274089)
山西省自然科学基金资助项目(2011011003-1)~~
关键词
太阳能电池
光子晶体
全角度反射
传输矩阵法
平面波展开法
完全光子禁带
solar cells
photonic crystal
omnidirectional total reflection
transfer matrix method
plane wave expansion method
complete photonic bandgap
