Zhang Jiakang, Li Zhipeng, Guo Fengjuan, Jiang Haokun, Yan Wenjian, Peng Cheng, Liu Ruixin, Wang Li, Gao Hongtao, Pang Shuping, Zhou Zhongmin
College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, 266042, Qingdao, P. R. China.
Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, 266101, Qingdao, P. R. China.
Angew Chem Int Ed Engl. 2023 Aug 1;62(31):e202305221. doi: 10.1002/anie.202305221. Epub 2023 Jun 27.
High-performance perovskite solar cells have demonstrated commercial viability, but still face the risk of contamination from lead leakage and long-term stability problems caused by defects. Here, an organic small molecule (octafluoro-1,6-hexanediol diacrylate) is introduced into the perovskite film to form a polymer through in situ thermal crosslinking, of which the carbonyl group anchors the uncoordinated Pb of perovskite and reduces the leakage of lead, along with the -CF - hydrophobic group protecting the Pb from water invasion. Additionally, the polymer passivates varieties of Pb-related and I-related defects through coordination and hydrogen bonding interactions, regulating the crystallization of perovskite film with reduced trap density, releasing lattice strain, and promoting carrier transport and extraction. The optimal efficiencies of polymer-incorporated devices are 24.76 % (0.09 cm ) and 20.66 % (14 cm ). More importantly, the storage stability, thermal stability, and operational stability have been significantly improved.
高性能钙钛矿太阳能电池已展现出商业可行性，但仍面临铅泄漏污染风险以及由缺陷导致的长期稳定性问题。在此，一种有机小分子（八氟-1,6-己二醇二丙烯酸酯）被引入钙钛矿薄膜中，通过原位热交联形成聚合物，其中羰基锚定钙钛矿中未配位的铅并减少铅的泄漏，同时-CF-疏水基团保护铅免受水的侵入。此外，该聚合物通过配位和氢键相互作用钝化各种与铅相关和与碘相关的缺陷，调节钙钛矿薄膜的结晶，降低陷阱密度，释放晶格应变，并促进载流子传输和提取。掺入聚合物的器件的最佳效率分别为24.76%（0.09平方厘米）和20.66%（14平方厘米）。更重要的是，存储稳定性、热稳定性和操作稳定性都得到了显著提高。
