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Stretchable and colorless freestanding microwire arrays for transparent solar cells with flexibility.
Light: Science & Applications ( IF 20.6 ) Pub Date : 2019-12-12 , DOI: 10.1038/s41377-019-0234-y Sung Bum Kang 1 , Ji-Hwan Kim 2 , Myeong Hoon Jeong 1 , Amit Sanger 1 , Chan Ul Kim 1 , Chil-Min Kim 2 , Kyoung Jin Choi 1
Light: Science & Applications ( IF 20.6 ) Pub Date : 2019-12-12 , DOI: 10.1038/s41377-019-0234-y Sung Bum Kang 1 , Ji-Hwan Kim 2 , Myeong Hoon Jeong 1 , Amit Sanger 1 , Chan Ul Kim 1 , Chil-Min Kim 2 , Kyoung Jin Choi 1
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Transparent solar cells (TSCs) are emerging devices that combine the advantages of visible transparency and light-to-electricity conversion. Currently, existing TSCs are based predominantly on organics, dyes, and perovskites; however, the rigidity and color-tinted transparent nature of those devices strongly limit the utility of the resulting TSCs for real-world applications. Here, we demonstrate a flexible, color-neutral, and high-efficiency TSC based on a freestanding form of n-silicon microwires (SiMWs). Flat-tip SiMWs with controllable spacing are fabricated via deep-reactive ion etching and embedded in a freestanding transparent polymer matrix. The light transmittance can be tuned from ~10 to 55% by adjusting the spacing between the microwires. For TSCs, a heterojunction is formed with a p-type polymer in the top portion of the n-type flat-tip SiMWs. Ohmic contact with an indium-doped ZnO film occurs at the bottom, and the side surface has an Al2O3 passivation layer. Furthermore, slanted-tip SiMWs are developed by a novel solvent-assisted wet etching method to manipulate light absorption. Finite-difference time-domain simulation revealed that the reflected light from slanted-tip SiMWs helps light-matter interactions in adjacent microwires. The TSC based on the slanted-tip SiMWs demonstrates 8% efficiency at a visible transparency of 10% with flexibility. This efficiency is the highest among Si-based TSCs and comparable with that of state-of-the-art neutral-color TSCs based on organic-inorganic hybrid perovskite and organics. Moreover, unlike others, the stretchable and transparent platform in this study is promising for future TSCs.
中文翻译：
可伸展且无色的独立式微线阵列，可灵活地用于透明太阳能电池。
透明太阳能电池（TSC）是新兴的设备，结合了可见透明性和光电转换的优点。当前，现有的TSC主要基于有机物，染料和钙钛矿。但是，这些设备的刚性和色泽透明的特性极大地限制了所得TSC在实际应用中的实用性。在这里，我们展示了一种基于独立形式的n硅微线（SiMWs）的灵活，色中性和高效TSC。通过深度反应离子刻蚀制造间距可控的平头SiMW，并将其嵌入独立的透明聚合物基质中。通过调整微线之间的间距，可以将透光率从〜10调整到55％。对于TSC，在n型平头SiMW的顶部用p型聚合物形成异质结。与铟掺杂的ZnO膜的欧姆接触发生在底部，并且侧面具有Al2O3钝化层。此外，通过一种新型的溶剂辅助湿法蚀刻技术开发了倾斜尖端的SiMW，以控制光吸收。时域有限差分仿真显示，倾斜的SiMW的反射光有助于相邻微线中的光-物质相互作用。基于倾斜式SiMW的TSC展示了8％的效率，可见透明性为10％，并且具有灵活性。该效率是硅基TSC中最高的，可与基于有机-无机杂化钙钛矿和有机物的最新中性色TSC媲美。而且，与其他人不同，
更新日期：2019-12-13
中文翻译：
可伸展且无色的独立式微线阵列，可灵活地用于透明太阳能电池。
透明太阳能电池（TSC）是新兴的设备，结合了可见透明性和光电转换的优点。当前，现有的TSC主要基于有机物，染料和钙钛矿。但是，这些设备的刚性和色泽透明的特性极大地限制了所得TSC在实际应用中的实用性。在这里，我们展示了一种基于独立形式的n硅微线（SiMWs）的灵活，色中性和高效TSC。通过深度反应离子刻蚀制造间距可控的平头SiMW，并将其嵌入独立的透明聚合物基质中。通过调整微线之间的间距，可以将透光率从〜10调整到55％。对于TSC，在n型平头SiMW的顶部用p型聚合物形成异质结。与铟掺杂的ZnO膜的欧姆接触发生在底部，并且侧面具有Al2O3钝化层。此外，通过一种新型的溶剂辅助湿法蚀刻技术开发了倾斜尖端的SiMW，以控制光吸收。时域有限差分仿真显示，倾斜的SiMW的反射光有助于相邻微线中的光-物质相互作用。基于倾斜式SiMW的TSC展示了8％的效率，可见透明性为10％，并且具有灵活性。该效率是硅基TSC中最高的，可与基于有机-无机杂化钙钛矿和有机物的最新中性色TSC媲美。而且，与其他人不同，
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