材料科学
钙钛矿(结构)
能量转换效率
异质结
离子键合
磁滞
纳米技术
光电子学
化学工程
化学物理
离子
凝聚态物理
物理
量子力学
工程类
作者
Weili Fan,Ying Shen,Kaiming Deng,Qinghua Chen,Yang Bai,Liang Li
出处
期刊:Nano Energy
[Elsevier]
日期:2022-09-01
卷期号:100: 107518-107518
被引量:18
标识
DOI:10.1016/j.nanoen.2022.107518
摘要
Planar-type perovskite solar cells have attracted extensive attentions due to their simple architecture and manufacturing. However, an imperfect heterojunction at the electron-selective contact side with abundant detrimental defects and weak binding strength induces severe charge recombination and device instability during long-term operation, which seriously hinders the further development and application prospect. Herein, we demonstrate π-conjugated oxysalt as an efficient interfacial binder and defect passivator for the stabilization of SnO2/perovskite interface. Theoretical modeling and experimental studies confirm the synergistic effect of ionic bonding and π-cation interaction in reducing defect density and mitigating charge recombination. An impressive power conversion efficiency up to 24.05%, a fill factor as high as 84.52%, and negligible hysteresis can be achieved in optimized solar cell. π-conjugated oxysalt interlayer can also improve device stability by offering a robust interface. Our work highlights the significance of chemical bonding engineering in constructing a high-quality heterojunction for efficient and stable perovskite solar cells.
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