D-A型分子的界面偶极子管理用于高效钙钛矿太阳能电池

Interface Dipole Management of D-A-Type Molecules for Efficient Perovskite Solar Cells, Angew. Chem. Int. Ed. 2024, e202404289

      

钙钛矿薄膜的界面工程一直是提高钙钛矿太阳能电池效率和稳定性的主要策略。鉴于此，2024年5月7日南京工业大学王芳芳于Angew刊发D-A型分子的界面偶极子管理用于高效钙钛矿太阳能电池的研究成果，设计了三种具有空穴传输和不同锚定单元的新型供体-受体（D-A）型界面偶极子（DAID）分子，并将其应用于钙钛矿太阳能电池。DAID分子在钙钛矿薄膜上形成界面偶极子可以有效调节能级排列，提高电荷提取并减少非辐射复合。在三种DAID分子中，带有酰胺基团的TPA-BAM表现出最好的化学和光电性能，由于缺陷密度降低，其效率达到25.29%，开路电压提高到1.174 V，填充因子达到84.34%。并改进了界面空穴的提取。同时，非封装器件的运行稳定性也得到显著提升。该研究为合理筛选高效稳定的钙钛矿太阳能电池界面偶极材料提供了前景。

Interfacial engineering of perovskite films has been the main strategies in improving the efficiency and stability of perovskite solar cells (PSCs). In this study, three new donor-acceptor (D–A)-type interfacial dipole (DAID) molecules with hole-transporting and different anchoring units are designed and employed in PSCs. The formation of interface dipoles by the DAID molecules on the perovskite film can efficiently modulate the energy level alignment, improve charge extraction, and reduce non-radiative recombination. Among the three DAID molecules, TPA-BAM with amide group exhibits the best chemical and optoelectrical properties, achieving a champion PCE of 25.29 % with the enhanced open-circuit voltage of 1.174 V and fill factor of 84.34 %, due to the reduced defect density and improved interfacial hole extraction. Meanwhile, the operational stability of the unencapsulated device has been significantly improved. Our study provides a prospect for rationalized screening of interfacial dipole materials for efficient and stable PSCs.

原文：

https://onlinelibrary.wiley.com/doi/10.1002/anie.202404289