Bioinspired phase-separated disordered nanostructures for thin photovoltaic absorbers.
Bioinspired phase-separated disordered nanostructures for thin photovoltaic absorbers.
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DOI：
10.1126/sciadv.1700232
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发表时间：
2017-10
期刊：
影响因子：
13.6
通讯作者：
Hölscher H
中科院分区：
文献类型：
--
作者：
Siddique RH;Donie YJ;Gomard G;Yalamanchili S;Merdzhanova T;Lemmer U;Hölscher H
受黑色蝴蝶鳞片的启发，自组装的相分离纳米结构形成了高效的光伏吸收器。黑蝴蝶Pachliopta aristolochiae的翅膀上覆盖着微米和纳米结构的鳞片，可以在很宽的光谱和角度范围内收集阳光。考虑到这些属性是特别有吸引力的光伏应用，我们分析了这些微米和纳米结构的贡献，专注于观察到的结构紊乱的翅膀规模。除了显微光谱实验，我们进行三维光学模拟的确切规模的结构。在这些结果的基础上，我们设计了无序纳米孔的纳米结构的薄光伏吸收体，其联合收割机将高效的光耦合和光捕获特性与高角度鲁棒性结合在一起。最后，受自组装生物光子纳米结构相分离机制的启发，我们使用基于二元聚合物混合物相分离的可扩展的自组装图案化技术制造了这些生物激发吸收体。纳米图案化的吸收器在光的法向入射角下实现了90%的相对积分吸收增加，在大入射角下高达200%，证明了黑色蝴蝶结构在薄膜太阳能电池中用于光捕获目的的潜力。
Inspired by black butterfly scales, self-assembled phase-separated nanostructures form efficient photovoltaic absorbers. The wings of the black butterfly, Pachliopta aristolochiae, are covered by micro- and nanostructured scales that harvest sunlight over a wide spectral and angular range. Considering that these properties are particularly attractive for photovoltaic applications, we analyze the contribution of these micro- and nanostructures, focusing on the structural disorder observed in the wing scales. In addition to microspectroscopy experiments, we conduct three-dimensional optical simulations of the exact scale structure. On the basis of these results, we design nanostructured thin photovoltaic absorbers of disordered nanoholes, which combine efficient light in-coupling and light-trapping properties together with a high angular robustness. Finally, inspired by the phase separation mechanism of self-assembled biophotonic nanostructures, we fabricate these bioinspired absorbers using a scalable, self-assembly patterning technique based on the phase separation of binary polymer mixture. The nanopatterned absorbers achieve a relative integrated absorption increase of 90% at a normal incident angle of light to as high as 200% at large incident angles, demonstrating the potential of black butterfly structures for light-harvesting purposes in thin-film solar cells.
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影响因子：
1.9
作者：
GHIRADELLA, H
通讯作者：
GHIRADELLA, H
影响因子：
3.4
作者：
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