Efficient Regular Perovskite Solar Cells Based on Pristine [70]Fullerene as Electron-Selective Contact
Efficient Regular Perovskite Solar Cells Based on Pristine [70]Fullerene as Electron-Selective Contact
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DOI：
10.1002/cssc.201600051
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发表时间：
2016-06-08
期刊：
影响因子：
8.4
通讯作者：
Luis Delgado, Juan
中科院分区：
文献类型：
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作者：
Collavini, Silvia;Kosta, Ivet;Luis Delgado, Juan
[70]富勒烯被认为是一种用于常规结构钙钛矿太阳能电池（PSC）的有效替代电子选择性接触（ESC）。用于制备基于[70]-和[60]富勒烯的太阳能电池的智能、简单、描述良好的溶液处理方案，即富勒烯饱和方法（FSA），使我们能够获得两种富勒烯材料相似的功率转换效率（即基于[70]-和[60]富勒烯的器件分别为10.4%和11.4%）。重要的是，尽管 [70] 富勒烯的电子迁移率较低且可见光吸收显着，但所提出的方案允许使用 [70] 富勒烯作为有效的 ESC。 [70]富勒烯薄膜厚度及其在钙钛矿加工溶液中的溶解度是关键参数，可以通过使用这种简单的溶液加工方案来控制。通过用[70]富勒烯饱和钙钛矿处理溶液，避免了钙钛矿沉积过程中溶解对[70]富勒烯薄膜的损害。此外，这种富勒烯饱和策略显着提高了钙钛矿薄膜的性能，并提高了基于不同ESC（即[60]富勒烯、[70]富勒烯和TiO2）的太阳能电池的功率转换效率。因此，这种通用解决方案处理协议拓宽了 PSC 进一步发展的机会。
[70]Fullerene is presented as an efficient alternative electron-selective contact (ESC) for regular-architecture perovskite solar cells (PSCs). A smart and simple, well-described solution processing protocol for the preparation of [70]- and [60]fullerene-based solar cells, namely the fullerene saturation approach (FSA), allowed us to obtain similar power conversion efficiencies for both fullerene materials (i.e., 10.4 and 11.4% for [70]- and [60]fullerene-based devices, respectively). Importantly, despite the low electron mobility and significant visible-light absorption of [70]fullerene, the presented protocol allows the employment of [70]fullerene as an efficient ESC. The [70]fullerene film thickness and its solubility in the perovskite processing solutions are crucial parameters, which can be controlled by the use of this simple solution processing protocol. The damage to the [70]fullerene film through dissolution during the perovskite deposition is avoided through the saturation of the perovskite processing solution with [70]fullerene. Additionally, this fullerene-saturation strategy improves the performance of the perovskite film significantly and enhances the power conversion efficiency of solar cells based on different ESCs (i.e., [60]fullerene, [70]fullerene, and TiO2). Therefore, this universal solution processing protocol widens the opportunities for the further development of PSCs.