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首页> 外文期刊>RSC Advances >Facile preparation of high-quality perovskites for efficient solar cells via a fast conversion of wet PbI2 precursor films
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Facile preparation of high-quality perovskites for efficient solar cells via a fast conversion of wet PbI2 precursor films

机译：通过快速转化湿的PbI 2 前体薄膜快速便捷地制备高效钙钛矿，用于高效太阳能电池

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摘要

High-performance perovskite solar cells are strongly dependent on the quality of the perovskite layer. Here, a high crystallinity, sufficiently smooth and pinhole-free CH3NH3PbI3 film with excellent photovoltaic properties has been successfully prepared by a facile and reproducible approach, in which the CH3NH3I (MAI) was deposited directly onto wet PbI2 (w-PbI2) precursor films. It is found that the outstanding morphology and low crystallization of the w-PbI2 film significantly promotes the conversion of PbI2 to CH3NH3PbI3, improves the morphology and crystallinity of the perovskite, and leads to further reduction of the recombination of photogenerated carriers and increment of the lifetimes of charge carriers in the fabricated devices. Compared with the control devices fabricated using a conventional dry and compact PbI2 film, perovskite solar cells fabricated by using this new method show much higher efficiency and reproducibility. The average power conversion efficiency of the fabricated solar cells is greatly improved from 9.76 ± 0.46% to 15.22 ± 0.17%, which is an increase of nearly 56%. Thus, we demonstrate an effective strategy to prepare high-quality perovskite films with excellent photovoltaic properties.
机译：高性能钙钛矿太阳能电池在很大程度上取决于钙钛矿层的质量。在此，结晶度高，足够光滑且无针孔的CH 3 NH 3 PbI 3 薄膜，其中CH 3 NH < sub> 3 I（MAI）直接沉积在湿的PbI 2 （w-PbI 2 ）前体膜。发现w-PbI 2 薄膜的杰出形态和低结晶度显着促进了PbI 2 的转化small>到CH 3 NH 3 PbI 3 2 薄膜制造的控制装置相比，使用这种新方法制造的钙钛矿太阳能电池具有更高的效率和可重复性。制成的太阳能电池的平均功率转换效率从9.76±0.46％大大提高到15.22±0.17％，提高了近56％。因此，我们展示了一种制备具有优异光伏性能的高质量钙钛矿薄膜的有效策略。

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