Two-dimensional photonic crystal for absorption enhancement in hydrogenated amorphous silicon thin film solar cells
Two-dimensional photonic crystal for absorption enhancement in hydrogenated amorphous silicon thin film solar cells
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DOI：
10.1063/1.3506702
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发表时间：
2010-12-15
影响因子：
3.2
通讯作者：
Seassal, Christian
中科院分区：
文献类型：
--
作者：
Gomard, Guillaume;Drouard, Emmanuel;Seassal, Christian
我们提出了一种基于100 nm厚的吸收层的光伏太阳能电池设计，该吸收层由氢化非晶硅制成，图案化为二维平面光子晶体(PPC)。在扫描了图案化单元内的PPC的参数之后，对所获得的最佳配置进行的光学模拟显示，与正常入射下的同等但未图案化的单元相比，在300至720 nm之间，可预期有源层内的积分吸收相对增加28%。此外，这种积分吸收对于入射角也是很强的。只要适当地调节PPC的参数，入射光就可以有效地耦合到PPC的漏模共振。文中还讨论了与导电性光学隔离体耦合的背接触的反射率对吸收的影响。(C)2010年美国物理研究所。[DOI：10.1063/1.3506702]
We propose a photovoltaic solar cell design based on a 100 nm thick absorbing layer made of hydrogenated amorphous silicon and patterned as a two-dimensional planar photonic crystal (PPC). After scanning the parameters of the PPC within the patterned cell, optical simulations performed on the best configuration obtained reveal that a relative increase in the integrated absorption inside the active layer of 28% can be expected between 300 and 720 nm compared to an equivalent but nonpatterned cell under normal incidence. Besides, this integrated absorption is found to be robust toward the angle of incidence. Incident light is efficiently coupled to leaky mode resonances of the PPC provided an appropriated tuning of its parameters. The effects of the reflectance of the back contact coupled to a conductive optical spacer on the absorption are also discussed. (c) 2010 American Institute of Physics. [doi: 10.1063/1.3506702]