Dual-interface gratings for broadband absorption enhancement in thin-film solar cells
Dual-interface gratings for broadband absorption enhancement in thin-film solar cells
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DOI：
10.1103/physrevb.85.115449
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发表时间：
2012-03-30
影响因子：
3.7
通讯作者：
Maes, Bjorn
中科院分区：
文献类型：
--
作者：
Abass, Aimi;Le, Khai Q.;Maes, Bjorn
我们数值研究了复杂的双界面光栅系统，以提高薄膜硅太阳能电池的吸收效率。我们联合收割机将太阳能电池背面的等离子体光栅与电池正面的介电光栅相结合。我们证明了一个原则，一维光栅，光栅的明显不同的性质可以提供互补的增强机制，我们进一步利用定制的特定周期，并通过引入闪耀。在特定界面处具有不同的周期允许更有效地衍射到等离子体激元和介电导模两者中。此外，光栅特有的闪耀通过对称性破缺将额外的模式暴露给法向入射光。根据光子现象的选择，多种优化路线是可能的。
We numerically study complex dual-interface grating systems to enhance absorption efficiency in thin-film silicon solar cells. We combine a plasmonic grating at the back side of the solar cell with a dielectric grating at the front side of the cell. We show a proof of principle, with one-dimensional gratings, that the distinctly different nature of the gratings can provide complementary enhancement mechanisms, which we further exploit by tailoring the specific periodicities, and by introducing blazing. Having different periods at specific interfaces allows for more efficient diffraction into both plasmonic and dielectric guided modes. In addition, grating specific blazing exposes extra modes to normal incident light through symmetry breaking. Multiple optimization routes are possible depending on the choice of photonic phenomena.