钝化
钙钛矿(结构)
图层(电子)
材料科学
电荷(物理)
传输层
载流子
光电子学
纳米技术
工程物理
化学
物理
结晶学
量子力学
作者
Zihan Qu,Yang Zhao,Fei Ma,Le Mei,Xiankai Chen,Haitao Zhou,Xinbo Chu,Yingguo Yang,Qi Jiang,Xingwang Zhang,Jingbi You
标识
DOI:10.1038/s41467-024-52925-y
摘要
Surface passivation has been developed as an effective strategy to reduce trap-state density and suppress non-radiation recombination process in perovskite solar cells. However, passivation agents usually own poor conductivity and hold negative impact on the charge carrier transport in device. Here, we report a binary and synergistical post-treatment method by blending 4-tert-butyl-benzylammonium iodide with phenylpropylammonium iodide and spin-coating on perovskite surface to form passivation layer. The binary and synergistical post-treated films show enhanced crystallinity and improved molecular packing as well as better energy band alignment, benefiting for the hole extraction and transfer. Moreover, the surface defects are further passivated compared with unary passivation. Based on the strategy, a record-certified quasi-steady power conversion efficiency of 26.0% perovskite solar cells is achieved. The devices could maintain 81% of initial efficiency after 450 h maximum power point tracking.
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