Optimization of hybrid antireflection structure integrating surface texturing and multi-layer interference coating
Optimization of hybrid antireflection structure integrating surface texturing and multi-layer interference coating
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DOI：
10.1117/12.2061600
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发表时间：
2014-10
期刊：
影响因子：
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通讯作者：
S. Kubota;K. Kanomata;Takahiko Suzuki;F. Hirose
中科院分区：
文献类型：
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作者：
S. Kubota;K. Kanomata;Takahiko Suzuki;F. Hirose
太阳能电池的增透结构主要分为两种不同的技术，即表面织构和单层或多层增透干涉涂层。在这项研究中，我们提出了一种新型的混合ARS，该ARS集成了蛾眼纹理和多层涂层，用于有机光伏（opv）。利用基于时域有限差分（FDTD）方法的光学模拟，对表征混合ARS的几何参数进行了近全局优化。本文提出的优化算法分为两步：第一步，在没有多层涂层的情况下，优化蛾眼阵列的周期和高度；第二步，将第一步得到的解作为起始搜索点，对混合ARS的整体结构进行优化。全局搜索和局部搜索分别采用简单网格搜索和Hooke and Jeeves模式搜索方法。此外，我们还研究了混合ARS几何参数偏离其最优值的影响。混合ARS的设计理念对opv中的宽带光捕获非常有利。
The antireflection structure (ARS) for solar cells is categorized to mainly two different techniques, i.e., the surface texturing and the single or multi-layer antireflection interference coating. In this study, we propose a novel hybrid ARS, which integrates moth eye texturing and multi-layer coat, for application to organic photovoltaics (OPVs). Using optical simulations based on the finite-difference time-domain (FDTD) method, we conduct nearly global optimization of the geometric parameters characterizing the hybrid ARS. The proposed optimization algorithm consists of two steps: in the first step, we optimize the period and height of moth eye array, in the absence of multi-layer coating. In the second step, we optimize the whole structure of hybrid ARS by using the solution obtained by the first step as the starting search point. The methods of the simple grid search and the Hooke and Jeeves pattern search are used for global and local searches, respectively. In addition, we study the effects of deviations in the geometric parameters of hybrid ARS from their optimized values. The design concept of hybrid ARS is highly beneficial for broadband light trapping in OPVs.