余弦光栅硅薄膜太阳能电池光吸收分析

发布时间：2018-04-25 00:28

本文选题：光电子学 + 光吸收　；参考：《光子学报》2017年04期

【摘要】：设计了一维双层余弦共形光栅结构的单晶硅薄膜太阳能电池.利用时域有限差分法模拟计算了双层余弦共形光栅结构和对照组结构的吸收光谱;利用归一化光吸收密度的概念,定量分析了300~700nm和700~1 100nm两个波段的光吸收效率.结果表明双层共形光栅结构具有更好的全波段吸收效率,且在长波段余弦光栅比矩形光栅具有更好的光捕获和吸收作用.利用光吸收增强谱和电磁场强度分布图,分析了余弦光栅在长波段的吸收增强机理.通过计算短路电流密度,发现双层余弦共形光栅结构比平板结构太阳能电池的短路电流密度提高了79.5%,余弦光栅结构比矩形光栅结构的短路电流密度提高了8.5%.
[Abstract]:A single crystal silicon thin film solar cell with one-dimensional double-layer cosine conformal grating structure is designed. The absorption spectra of the double CoSine conformal grating and the control structure are simulated by using the finite-difference time-domain method, and the optical absorption efficiencies of the 300~700nm and 700-1 100nm bands are quantitatively analyzed by using the concept of normalized optical absorption density. The results show that the double-layer conformal grating structure has better absorption efficiency and has better optical capture and absorption than rectangular grating in long wavelength cosine grating. The absorption enhancement mechanism of cosine grating in long wavelength band is analyzed by means of optical absorption enhancement spectrum and electric magnetic field intensity distribution. By calculating the short circuit current density, it is found that the short circuit current density of the double CoSine conformal grating is 79.5 higher than that of the flat panel solar cell, and the short circuit current density of the CoSine grating is 8.5% higher than that of the rectangular grating.
【作者单位】：合肥工业大学机械工程学院安徽省数字化设计与制造重点实验室;
【基金】：国家自然科学基金重点项目(No.51435003)资助~~
【分类号】：TM914.4

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