Modifying the surface of poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] (PTAA) with toluene during the high-speed spin-coating process of dimethylformamide considerably improves the wettability and morphology of PTAA and results in improvement of the crystallinity and absorption of perovskite film. The hole mobility and ohm contact have also been improved accordingly. Combined with these improved parameters, inverted perovskite solar cells with high efficiency of 19.13% and long-term stability could be achieved, which are much better than those with untreated PTAA. Importantly, our devices can keep 88.4% of the initial power conversion efficiency after 30 days of storage in ambient air.

中文翻译：

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用甲苯对 PTAA 进行表面改性，用于高效稳定的倒置钙钛矿太阳能电池

在二甲基甲酰胺的高速旋涂过程中用甲苯对聚[双（4-苯基）（2,4,6-三甲基苯基）胺]（PTAA）的表面进行改性，显着改善了 PTAA 的润湿性和形貌，并导致提高钙钛矿薄膜的结晶度和吸收率。空穴迁移率和欧姆接触也相应得到改善。结合这些改进的参数，可以实现19.13%的高效率和长期稳定性的倒置钙钛矿太阳能电池，这比未经处理的PTAA要好得多。重要的是，我们的设备在环境空气中存放 30 天后仍能保持 88.4% 的初始功率转换效率。