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In Situ Methylammonium Chloride-Assisted Perovskite Crystallization Strategy for High-Performance Solar Cells
ACS Materials Letters ( IF 9.6 ) Pub Date : 2022-02-01 , DOI: 10.1021/acsmaterialslett.1c00830 Wei-Wei Zuo 1, 2 , Ying-Guo Yang 3 , Wei-Fei Fu 4 , Meng Li 5 , Mahdi Malekshahi Byranvand 1, 6 , Diego Di Girolamo 2 , Jorge Pascual 2 , Meng-Qi Li 4 , Li−Na Li 3 , Antonio Abate 2 , Michael Saliba 1, 4, 6 , Zhao-Kui Wang 7
ACS Materials Letters ( IF 9.6 ) Pub Date : 2022-02-01 , DOI: 10.1021/acsmaterialslett.1c00830 Wei-Wei Zuo 1, 2 , Ying-Guo Yang 3 , Wei-Fei Fu 4 , Meng Li 5 , Mahdi Malekshahi Byranvand 1, 6 , Diego Di Girolamo 2 , Jorge Pascual 2 , Meng-Qi Li 4 , Li−Na Li 3 , Antonio Abate 2 , Michael Saliba 1, 4, 6 , Zhao-Kui Wang 7
Affiliation
The optimization of perovskite crystallization is critical to achieving high-performance perovskite solar cells (PSCs). In the standard crystallization methods, the additives play an important role not only in optimizing the crystallization but also passivating the defect states of perovskite films. Methylammonium chloride (MACl) is one of the frequently used additives in this regard. However, the performance mechanism of MACl in the perovskite crystallization process still needs more investigation. This work presents the quality improvement of a perovskite film using MACl vapor as an external chlorine source. The in situ 2D-GIXRD and real-time X-ray diffraction characterizations provide a better understanding the performance mechanism of MACl. Our results demonstrate that exposing the perovskite film to the MACl vapor during the crystallization process can effectively enhance the film quality in addition to enlarging the grain sizes. As a result, the MAPbI3 film optimized by our process leads to highly efficient PSCs with a power conversion efficiency (PCE) of ∼21%.
中文翻译:
用于高性能太阳能电池的原位甲基氯化铵辅助钙钛矿结晶策略
钙钛矿结晶的优化对于实现高性能钙钛矿太阳能电池(PSC)至关重要。在标准结晶方法中,添加剂不仅在优化结晶过程中发挥重要作用,而且在钝化钙钛矿薄膜的缺陷状态方面也发挥着重要作用。在这方面,甲基氯化铵 (MACl) 是常用的添加剂之一。然而,MACl在钙钛矿结晶过程中的性能机制仍需要更多的研究。这项工作展示了使用 MACl 蒸气作为外部氯源的钙钛矿薄膜的质量改进。原位 2D-GIXRD 和实时 X 射线衍射表征提供了更好的理解 MACl 的性能机制。我们的结果表明,在结晶过程中将钙钛矿薄膜暴露于 MACl 蒸气中,除了可以扩大晶粒尺寸外,还可以有效地提高薄膜质量。因此,MAPbI通过我们的工艺优化的3薄膜可产生高效的 PSC,其功率转换效率 (PCE) 约为 21%。
更新日期:2022-02-01
中文翻译:
用于高性能太阳能电池的原位甲基氯化铵辅助钙钛矿结晶策略
钙钛矿结晶的优化对于实现高性能钙钛矿太阳能电池(PSC)至关重要。在标准结晶方法中,添加剂不仅在优化结晶过程中发挥重要作用,而且在钝化钙钛矿薄膜的缺陷状态方面也发挥着重要作用。在这方面,甲基氯化铵 (MACl) 是常用的添加剂之一。然而,MACl在钙钛矿结晶过程中的性能机制仍需要更多的研究。这项工作展示了使用 MACl 蒸气作为外部氯源的钙钛矿薄膜的质量改进。原位 2D-GIXRD 和实时 X 射线衍射表征提供了更好的理解 MACl 的性能机制。我们的结果表明,在结晶过程中将钙钛矿薄膜暴露于 MACl 蒸气中,除了可以扩大晶粒尺寸外,还可以有效地提高薄膜质量。因此,MAPbI通过我们的工艺优化的3薄膜可产生高效的 PSC,其功率转换效率 (PCE) 约为 21%。