Suppressing Defects-Induced Nonradiative Recombination for Efficient Perovskite Solar Cells through Green Antisolvent Engineering.,Advanced Materials

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Suppressing Defects-Induced Nonradiative Recombination for Efficient Perovskite Solar Cells through Green Antisolvent Engineering.
Advanced Materials ( IF 27.4 ) Pub Date : 2020-08-07 , DOI: 10.1002/adma.202003965
Wenzhan Xu _{1,

2} , Yu Gao _{1,

2} , Wenjie Ming _{3,

4} , Fang He _{1,

2} , Jingzhou Li _{1,

2} , Xu-Hui Zhu ₅ , Feiyu Kang _{1,

2} , Jiangyu Li ₃ , Guodan Wei _{1,

2}

Affiliation

Organic–inorganic hybrid perovskites have attracted considerable attention due to their superior optoelectronic properties. Traditional one‐step solution‐processed perovskites often suffer from defects‐induced nonradiative recombination, which significantly hinders the improvement of device performance. Herein, treatment with green antisolvents for achieving high‐quality perovskite films is reported. Compared to defects‐filled ones, perovskite films by antisolvent treatment using methylamine bromide (MABr) in ethanol (MABr‐Eth) not only enhances the resultant perovskite crystallinity with large grain size, but also passivates the surface defects. In this case, the engineering of MABr‐Eth‐treated perovskites suppressing defects‐induced nonradiative recombination in perovskite solar cells (PSCs) is demonstrated. As a result, the fabricated inverted planar heterojunction device of ITO/PTAA/Cs_0.15FA_0.85PbI₃/PC₆₁BM/Phen‐NADPO/Ag exhibits the best power conversion efficiency of 21.53%. Furthermore, the corresponding PSCs possess a better storage and light‐soaking stability.

中文翻译：

通过绿色反溶剂工程技术抑制缺陷引起的高效钙钛矿太阳能电池的非辐射复合。

有机-无机杂化钙钛矿因其优异的光电性能而备受关注。传统的一步法加工钙钛矿通常会因缺陷引起的非辐射重组，从而大大阻碍了器件性能的提高。本文报道了用绿色抗溶剂处理以获得高质量钙钛矿薄膜的方法。与填充缺陷的钙钛矿相比，在乙醇（MABr-Eth）中使用甲胺溴化物（MABr）进行反溶剂处理的钙钛矿膜不仅可以增强晶粒尺寸较大的钙钛矿的结晶度，而且可以钝化表面缺陷。在这种情况下，展示了经过MABr-Eth处理的钙钛矿可抑制钙钛矿型太阳能电池（PSC）中的缺陷诱导的非辐射复合的工程设计。结果是，_0.15 FA _0.85 PbI ₃ / PC ₆₁ BM / Phen‐NADPO / Ag具有21.53％的最佳功率转换效率。此外，相应的PSC具有更好的存储和透光稳定性。

更新日期：2020-09-21

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