Strain Engineering of Metal–Halide Perovskites toward Efficient Photovoltaics: Advances and Perspectives,Solar RRL

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Strain Engineering of Metal–Halide Perovskites toward Efficient Photovoltaics: Advances and Perspectives
Solar RRL ( IF 6.0 ) Pub Date : 2020-12-16 , DOI: 10.1002/solr.202000672
Lei Gu ₁ , Deli Li ₁ , Lingfeng Chao ₁ , He Dong ₁ , Wei Hui ₁ , Tingting Niu ₁ , Chenxin Ran ₁ , Yingdong Xia ₂ , Lin Song ₁ , Yonghua Chen ₂ , Wei Huang _{1,

2,

3}

Affiliation

Due to the impressive optoelectronic properties, metal–halide perovskites (MHPs) have drawn much attention in the field of next‐generation photovoltaics, and perovskite solar cells (PSCs) based on MHPs as light absorbers have reached a certified power conversion efficiency (PCE) of 25.5% in 2020. Despite the great progress, it is still challenging to fabricate high‐quality MHP films. Due to the “soft” ionic nature of MHPs, their polycrystalline films suffer from inevitable residual strain, which is found to not only be fatal to photovoltaic performance of PSCs, but also seriously accelerate the degradation of MHP film. As a result, understanding of strain in MHPs and the key role of strain engineering in improving the photovoltaic performance of PSCs have recently been extensively investigated. Herein, the recent progress of strain engineering in MHPs and their PSCs is systematically summarized. First, the origin of strain in MHPs and the impact of strain on the optoelectronic characteristics of MHPs are carefully discussed. Thereafter, the up‐to‐date studies focusing on strain engineering in PSCs are comprehensively reviewed. At last, the current challenges and future prospects in this field are highlighted.

中文翻译：

金属卤化物钙钛矿向高效光伏的应变工程：进展与展望

由于其令人印象深刻的光电特性，金属卤化物钙钛矿（MHP）在下一代光伏领域备受关注，基于MHP的钙钛矿太阳能电池（PSC）吸光剂已达到认证的功率转换效率（PCE）到2020年，这一比例将达到25.5％。尽管取得了长足的进步，但制造高质量的MHP膜仍面临挑战。由于MHP的“软”离子性质，它们的多晶膜会不可避免地产生残余应变，这不仅会损害PSC的光伏性能，还会严重加速MHP膜的降解。结果，最近已经广泛地研究了对MHP中的应变的理解以及应变工程在改善PSC的光伏性能中的关键作用。在此处，系统总结了MHP及其PSC中的应变工程技术的最新进展。首先，仔细讨论了MHP中的应变起源以及应变对MHP光电特性的影响。此后，全面审查了针对PSC中的应变工程的最新研究。最后，重点介绍了该领域的当前挑战和未来前景。

更新日期：2020-12-16

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