Highly Efficient Flexible Perovskite Solar Cells with Antireflection and Self-Cleaning Nanostructures
Highly Efficient Flexible Perovskite Solar Cells with Antireflection and Self-Cleaning Nanostructures
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DOI：
10.1021/acsnano.5b04284
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发表时间：
2015-10-01
期刊：
影响因子：
17.1
通讯作者：
Fan, Zhiyong
中科院分区：
文献类型：
--
作者：
Tavakoli, Mohammad Mandi;Tsui, Kwong-Hoi;Fan, Zhiyong
柔性薄膜太阳能电池作为移动的电源和建筑物集成光电池的关键部件已经吸引了大量的关注，这是由于它们的重量轻和柔性特征以及与低成本卷对卷制造工艺的兼容性。在众多的薄膜材料中，有机金属钙钛矿材料正在成为高效率薄膜光电转换的非常有前途的候选者;然而，柔性钙钛矿太阳能电池的性能、可扩展性和可靠性仍有很大的改进空间。在此，我们报告了在可弯曲柔性玻璃上制造的高效柔性钙钛矿太阳能电池。在这种器件结构中，柔性玻璃基板是高度透明和坚固的，具有低的热膨胀系数，并且钙钛矿薄膜是用热蒸发方法沉积的，其显示出大规模的均匀性。此外，将纳米锥阵列反射膜附着到玻璃基板的正面，以提高光学透射率并同时实现防水效果。结果表明，所制备的太阳能电池具有良好的弯曲性能，在200次弯曲循环后，电池的弯曲性能仍保持在初始值的96%，电池的功率转换效率从12.06%提高到13.14%，同时具有良好的超疏水性。
Flexible thin film solar cells have attracted a great deal of attention as mobile power sources and key components for building-integrated photovoltaics, due to their light weight and flexible features in addition to compatibility with low-cost roll-to-roll fabrication processes. Among many thin film materials, organometallic perovskite materials are emerging as highly promising candidates for high efficiency thin film photovoltaics; however, the performance, scalability, and reliability of the flexible perovskite solar cells still have large room to improve. Herein, we report highly efficient, flexible perovskite solar cells fabricated on ultrathin flexible glasses. In such a device structure, the flexible glass substrate is highly transparent and robust, with low thermal expansion coefficient, and perovskite thin film was deposited with a thermal evaporation method that showed large-scale uniformity. In addition, a nanocone array antireflection film was attached to the front side of the glass substrate in order to improve the optical transmittance and to achieve a water-repelling effect at the same time. It was found that the fabricated solar cells have reasonable bendability, with 96% of the initial value remaining after 200 bending cycles, and the power conversion efficiency was improved from 12.06 to 13.14% by using the antireflection film, which also demonstrated excellent superhydrophobicity.