Key Laboratory of Flexible Electronics (KLOFE) & Institution of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) , Nanjing Tech University (NanjingTech) , Nanjing 211816 , Jiangsu , China.
Shaanxi Institute of Flexible Electronics (SIFE) , Northwestern Polytechnical University (NPU) , Xi'an 710072 , Shaanxi , China.
ACS Appl Mater Interfaces. 2018 Sep 12;10(36):30607-30613. doi: 10.1021/acsami.8b10332. Epub 2018 Aug 29.
Interfacial engineering is a simple and effective strategy that can improve the photovoltaic performance in organic-inorganic perovskite solar cells (PSCs). Herein, a dopamine (DA) self-assembled monolayer (SAM) was introduced on the top of the SnO electron transporting layer (ETL) to modify the SnO/perovskite interface. The processing temperature of the present devices is around 150 °C, and the power conversion efficiency of the PSCs was significantly improved to 16.65% compared to that of the device without modification (14.05%). Such enhancement in efficiency is mainly attributed to the improved quality of perovskite films by improving the affinity of the SnO ETL, thus leading to better carrier transport and low charge recombination at the SnO/perovskite interface. Moreover, the modified device by the DA SAM exhibited enhanced stability compared to the device without modification. Our results suggest that the introduction of the DA SAM on the ETL/perovskite interface is a promising method for highly efficient and stable PSCs.
界面工程是一种简单而有效的策略，可以提高有机-无机钙钛矿太阳能电池（PSC）的光伏性能。在此，在 SnO 电子传输层（ETL）的顶部引入多巴胺（DA）自组装单层（SAM），以修饰 SnO/钙钛矿界面。本器件的处理温度约为 150°C，与未修饰器件（14.05%）相比，PSC 的功率转换效率显著提高至 16.65%。这种效率的提高主要归因于通过改善 SnO ETL 的亲和力来提高钙钛矿薄膜的质量，从而导致更好的载流子输运和 SnO/钙钛矿界面处的低电荷复合。此外，经 DA SAM 修饰的器件的稳定性也比未修饰的器件有所提高。我们的结果表明，在 ETL/钙钛矿界面上引入 DA SAM 是实现高效稳定 PSC 的一种很有前途的方法。
