钝化
材料科学
钙钛矿(结构)
纳米技术
退火(玻璃)
兴奋剂
光电子学
原位
化学工程
化学
图层(电子)
冶金
工程类
有机化学
作者
Guan‐E Wang,Guo‐Bin Xiao,C. Li,Zhihua Fu,Jing Cao,Gang Xu
标识
DOI:10.1002/anie.202313833
摘要
Abstract Directional defects management in polycrystalline perovskite film with inorganic passivator is highly demanded while yet realized for fabricating efficient and stable perovskite solar cells (PSCs). Here, we develop a directional passivation strategy employing a two‐dimensional (2D) material, Cu‐(4‐mercaptophenol) (Cu‐HBT), as a passivator precursor. Cu‐HBT combines the merits of the targeted modification from organic passivator and excellent stability offered by inorganic passivator. Featuring with dense organic functional motifs on its surfaces, Cu‐HBT has the capability to “find” and fasten to the Pb defect sites in perovskites through coordination interactions during a spin‐coating process. During subsequent annealing treatment, the organic functional motifs cleave from Cu‐HBT and convert in situ into p ‐type semiconductors, Cu 2 S and PbS. The resultant Cu 2 S and PbS not only serve as stable inorganic passivators on the perovskite surface, significantly enhancing cell stability, but also facilitate efficient charge extraction and transport, resulting in an impressive efficiency of up to 23.5 %. This work contributes a new defect management strategy by directionally yielding the stable inorganic passivators for highly efficient and stable PSCs.
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