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Flexible crystalline silicon radial junction photovoltaics with vertically aligned tapered microwires†
Energy & Environmental Science ( IF 32.5 ) Pub Date : 2018-01-17 00:00:00 , DOI: 10.1039/c7ee03340k
Inchan Hwang 1, 2, 3, 4 , Han-Don Um 1, 2, 3, 4 , Byeong-Su Kim 1, 2, 3, 4, 5 , Munib Wober 6, 7, 8, 9 , Kwanyong Seo 1, 2, 3, 4
Affiliation  

Much attention has been paid to thin crystalline silicon (c-Si) photovoltaic devices due to their excellent flexibility characteristics, stable efficiency, and possibility of use as highly efficient next-generation flexible photovoltaic devices (FPVs). To fabricate thin c-Si FPVs, it is important to improve their light-absorption properties while maintaining the flexible characteristics. In this study, vertically aligned microwires (MWs) on a 50 μm-thick thin c-Si substrate are designed for novel FPVs. Increasing the length of the MWs enhances the optical properties of the thin c-Si without affecting its flexibility. To maximize the efficiency of the thin c-Si FPVs with MWs, tapered MWs and a localized back-contact structure are devised. This device shows a maximum efficiency of 18.9%. In addition, the proposed thin c-Si FPV with MWs shows high stability without any change in efficiency, even with 1000 bending cycles with a bending radius of 12 mm. Thus, we successfully demonstrate battery-free flexible electronic devices integrated with our thin c-Si FPVs with MWs.

中文翻译:

具有垂直对齐的锥形微线的柔性晶体硅径向结光伏电池

由于薄晶硅(c-Si)光电器件出色的柔韧性,稳定的效率以及用作高效的下一代柔性光电器件(FPV)的可能性,已经引起了人们的广泛关注。为了制造薄的c-Si FPV,重要的是在保持柔韧性的同时提高其光吸收性能。在这项研究中,将厚度为50μm的薄c-Si衬底上的垂直排列的微线(MWs)设计用于新型FPV。MW长度的增加会增强薄c-Si的光学性能,而不会影响其柔韧性。为了最大化具有MW的薄c-Si FPV的效率,设计了锥形MW和局部背接触结构。该设备的最高效率为18.9%。此外,所提出的具有MWs的薄c-Si FPV表现出很高的稳定性,而效率没有任何变化,即使在12次弯曲半径为12 mm的弯曲循环中也是如此。因此,我们成功地展示了集成有薄型c-Si FPV且具有MW的无电池柔性电子设备。
更新日期:2018-01-17
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