钝化
钙钛矿(结构)
卤化物
材料科学
碘化物
光伏系统
热稳定性
三卤化物
化学工程
能量转换效率
化学
光电子学
纳米技术
无机化学
图层(电子)
生态学
工程类
生物
作者
Cheng Liu,Yi Yang,Kasparas Rakštys,Arup Mahata,Marius Franckevičius,Edoardo Mosconi,Raminta Skackauskaite,Bin Ding,Keith G. Brooks,Onovbaramwen Jennifer Usiobo,Jean-Nicolas Audinot,Hiroyuki Kanda,Simonas Driukas,Gabrielė Kavaliauskaitė,Vidmantas Gulbinas,Marc Dessimoz,Vytautas Getautis,Filippo De Angelis,Yong Ding,Paul J. Dyson,Mohammad Khaja Nazeeruddin
标识
DOI:10.1038/s41467-021-26754-2
摘要
Organic halide salt passivation is considered to be an essential strategy to reduce defects in state-of-the-art perovskite solar cells (PSCs). This strategy, however, suffers from the inevitable formation of in-plane favored two-dimensional (2D) perovskite layers with impaired charge transport, especially under thermal conditions, impeding photovoltaic performance and device scale-up. To overcome this limitation, we studied the energy barrier of 2D perovskite formation from ortho-, meta- and para-isomers of (phenylene)di(ethylammonium) iodide (PDEAI2) that were designed for tailored defect passivation. Treatment with the most sterically hindered ortho-isomer not only prevents the formation of surficial 2D perovskite film, even at elevated temperatures, but also maximizes the passivation effect on both shallow- and deep-level defects. The ensuing PSCs achieve an efficiency of 23.9% with long-term operational stability (over 1000 h). Importantly, a record efficiency of 21.4% for the perovskite module with an active area of 26 cm2 was achieved.
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