Wang Peng, Menon Rajesh
Department of Electrical and Computer Engineering, University of Utah, Salt Lake City, Utah 84112, USA.
Opt Express. 2012 Jul 2;20 Suppl 4:A545-53. doi: 10.1364/OE.20.00A545.
Nanophotonics can guide the design of novel structures for light-trapping in ultra-thin photovoltaic cells. Here, we report on the systematic study of the effect of the angle of incidence of sunlight on the performance of such structures. We also conduct a parametric study of a sinusoidal grating and demonstrate that light intensity in the active region averaged over a range of input angles from 0° to 80° can be enhanced by more than 3 times compared to the bare device. Such a broadband light-trapping nanostructure can increase the total daily energy production of a fixed (non-tracking) device by over 60%, compared to a reference device with an anti-reflection coating.
纳米光子学可为超薄光伏电池中的光捕获设计新型结构。在此，我们报告了关于太阳光入射角对这类结构性能影响的系统研究。我们还对正弦光栅进行了参数研究，并证明与裸器件相比，在0°至80°的输入角度范围内平均的有源区光强可提高3倍以上。与具有抗反射涂层的参考器件相比，这种宽带光捕获纳米结构可使固定（非跟踪）器件的每日总能量产量提高60%以上。
