Using interface modification is an effective method to improve the crystallinity and stability of perovskite solar cells (PSCs). P-type poly(9-vinylcarbazole) (PVK) inserted the interface of perovskite and electron transport layer (ETL), which can improve the crystallinity and stability of PSCs. However, pure PVK-modified interface of perovskite/ETL is sensitive to the modified thickness and UV exposure, which can only improve limited PCE and anti-UV durability compared to the reference PSCs. The anti-oxidant (1,2-dioxoethylene)bis(iminoethylene) bis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate) (MD-697) doped into poly (9-vinyl carbazole) (PVK) was firstly introduced to modify the interface of perovskite and phenyl-C₆₁-butyric acid methyl (PCBM). MD-697:PVK-modified PSCs got the champion PCEs of 20.75% with less hysteresis effect, which is far higher than PCE (19.03%) of PVK-modified PSCs, (17.58%) MD-687-modified PSCs and (17.1%) of reference PSCs. MD-697:PVK-modified PSCs remained 89% of the original PCEs aged for 2800 h at room temperature and RH 85% under encapsulating condition and still remained 94% of the original PCE value aged for 6 h UV irradiation, which show best moisture resistance and UV durability. The joint coordination of C=O, NH and OH groups of MD-697 and carbazole groups of PVK can contribute to best crystallization of the perovskite layer, improving passivation effect and superior interface contact at perovskite/PCBM layers. The quasi-continuous two-dimension layer was formed on the surface of 3D perovskite film, which can further inhibit moisture invasion along grain boundaries. Therefore, MD-697:PVK jointly modified the perovskite film is an effective method to obtain efficient and stable PSCs.

使用界面改性是提高钙钛矿太阳能电池（PSC）结晶度和稳定性的有效方法。P型聚（9-乙烯基咔唑）（PVK）插入钙钛矿和电子传输层（ETL）的界面，可以提高PSC的结晶度和稳定性。然而，钙钛矿/ETL 的纯 PVK 改性界面对改性厚度和紫外线照射敏感，与参考 PSC 相比，它只能提高有限的 PCE 和抗紫外线耐久性。抗氧剂(1,2-二氧乙烯)双(亚氨基乙烯)双(3-(3,5-二叔丁基-4-羟基苯基)丙酸酯)(MD-697)掺入聚(9-乙烯基咔唑)中(PVK) 首次被引入修饰钙钛矿和苯基-C ₆₁的界面-丁酸甲基 (PCBM)。MD-697：PVK 修饰的 PSCs 获得了 20.75% 的冠军 PCE，滞后效应较小，远高于 PVK 修饰的 PSCs 的 PCE (19.03%)、MD-687 修饰的 PSCs (17.58%) 和 (17.1%) ) 的参考 PSC。MD-697：PVK修饰的PSCs在室温和RH 85%的封装条件下老化2800 h后仍保持原始PCE值的89%，在紫外光照射下老化6 h仍保持原始PCE值的94%，表现出最好的水分耐性和紫外线耐久性。MD-697 的 C=O、NH 和 OH 基团与 PVK 的咔唑基团的联合配位有助于钙钛矿层的最佳结晶，提高钙钛矿/PCBM 层的钝化效果和优异的界面接触。在3D钙钛矿薄膜表面形成了准连续的二维层，这可以进一步抑制沿晶界的水分侵入。因此，MD-697:PVK联合修饰钙钛矿薄膜是获得高效稳定PSCs的有效方法。