Defects and passivation in perovskite solar cells
Defects and passivation in perovskite solar cells
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钙钛矿太阳能电池的缺陷和钝化
DOI：
10.1680/jsuin.21.00058
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发表时间：
2021-12
影响因子：
3.5
通讯作者：
Jing Wei
中科院分区：
文献类型：
--
作者：
Yaobo Li;Zhaohan Li;Fangze Liu;Jing Wei
这种有机-无机杂化钙钛矿材料以其高吸收系数、低成本和简单的成膜工艺而受到人们的广泛关注。基于这些优点，钙钛矿太阳能电池的功率转换效率达到了令人印象深刻的25%以上。然而，低温工艺不可避免地导致钙钛矿薄膜中存在大量缺陷。这些缺陷会加剧载流子复合，导致晶体退化、相变，严重影响器件性能。研究钙钛矿薄膜中的缺陷对开发高性能钙钛矿太阳能电池具有重要意义。本文综述了钙钛矿太阳能电池中缺陷产生的原因、分布、特征及其对电池性能的影响。此外，还分别讨论了钙钛矿薄膜或器件的缺陷钝化策略，包括晶界钝化、表面钝化、覆盖层改性和电荷传输层钝化。最后，提出了钙钛矿太阳能电池商业化中存在的一些挑战。
This organic-inorganic hybrid perovskite materials have attracted great attention by virtue of their high absorption coefficient, low cost and simple film deposition technique. Based on these advantages, perovskite solar cells have reached an impressive power conversion efficiency over 25%. However, the low-temperature process inevitably leads to a large number of defects in the perovskite film. These defects would exacerbate the carrier recombination, induce crystal degradation, phase transformation and seriously affect the performance of devices. Studying the defects in perovskite film is of great significance for the development of high-performance perovskite solar cells. Herein, the authors summarise the causes, distribution and features of defects, as well as their effects on the performance of perovskite solar cells. Furthermore, some defect-passivation strategies on perovskite film or the device, including grain boundary passivation, surface passivation, capping layer modification and charge transport layer passivation, are discussed, respectively. Lastly, some remaining challenges in the commercialisation of perovskite solar cells are proposed.
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