High performance thin film solar cells on plastic substrates with nanostructure-enhanced flexibility
High performance thin film solar cells on plastic substrates with nanostructure-enhanced flexibility
复制标题
塑料基板上的高性能薄膜太阳能电池具有纳米结构增强的灵活性
DOI：
10.1016/j.nanoen.2016.02.042
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发表时间：
2016-04-01
期刊：
影响因子：
17.6
通讯作者：
Fan, Zhiyong
中科院分区：
文献类型：
--
作者：
Lin, Qingfeng;Lu, Linfeng;Fan, Zhiyong
塑料基板由于其上级柔性和重量轻的特性而在柔性薄膜太阳能电池应用中具有显著的优势。然而，将塑料基板用于高性能薄膜太阳能电池存在若干挑战，因为它们通常具有低熔融/软化温度和高热膨胀系数（CTE）。在这项工作中，我们展示了一种低成本的工艺，以实现聚酰亚胺（PI）基板上的规则的纳米锥阵列，具有独特的光子管理性能和优异的机械灵活性。为了利用纳米锥衬底的这些益处，在该结构上制造柔性非晶硅太阳能电池。有趣的是，人们发现，适当设计的纳米锥可以通过光管理显着提高太阳能电池器件的性能。设计合理的纳米锥太阳能电池的制作良率比平面器件高得多。此外，通过实验和力学模型验证，纳米锥塑料太阳能电池具有显著改善的弯曲能力和鲁棒性，显示出源自三维纳米结构设计的独特应力释放机制。这一特性对于柔性电子产品具有实际意义，而不仅限于太阳能电池。(C)2016爱思唯尔有限公司版权所有
Plastic substrates possess conspicuous advantages for flexible thin film solar cell applications due to their superior flexibility and light weight characteristics. However, there are several challenges of using plastic substrates for high performance thin film solar cells since they usually have low melting/softening temperature and high coefficient of thermal expansion (CTE). In this work, we demonstrated a low cost process to achieve regular nanocone arrays on polyimide (PI) substrates which have unique photon management property and excellent mechanical flexibility. To leverage these benefits of the nanocone substrates, flexible amorphous Si solar cells were fabricated on the structures. Intriguingly, it was discovered that properly designed nanocones can significantly improve solar cell device performance via light management. And the fabrication yield of properly designed nanocone solar cells is much higher than that of planar devices. In addition, the nanocone plastic solar cells possess much improved bend ability and robustness verified by both experiment and mechanical modeling, showing unique stress release mechanism originated from three-dimensional nanostructure design. This property is of practical significance for flexible electronics not limited to solar cells. (C) 2016 Elsevier Ltd. All rights reserved.