Inverted perovskite solar cells (PSCs) with a p‐i‐n structure have attracted great attention. Normally, inorganic p‐type metal oxides or polymers are used as the hole‐transport material (HTM), a vital component in the inverted PSCs. However, this type of HTM often requires high processing temperatures and/or high costs. On the other hand, a commonly used organic HTM, poly(3,4‐ethylenedioxythiophene polystyrene sulfonate (PEDOT:PSS), is sensitive to humidity and thus affects the stability of the PSCs. Herein, we employ a small molecule, 4,4′,4′′‐tris(N‐3‐methylphenyl‐N‐phenylamino) triphenylamine (m‐MTDATA) to replace PEDOT:PSS as a new HTM for inverted PSCs. Compared to a PEDOT:PSS‐based device, m‐MTDATA‐based PSCs exhibit enhanced performance. The highest power conversion efficiency (PCE) was notably improved from 13.44 % (PEDOT:PSS) to 18.12 % (m‐MTDATA), suggesting that m‐MTDATA could be an efficient HTM to achieve high performance inverted PSCs. Furthermore, the m‐MTDATA‐based device demonstrated improved stability (retaining 90 % PCE) under ambient conditions over 1000 h compared with the PEDOT:PSS‐based devices (retaining 40 % PCE).

中文翻译：

---

使用三苯胺空穴传输材料的高效，稳定的倒置平面钙钛矿太阳能电池

ap-i-n结构的倒钙钛矿太阳能电池（PSC）引起了极大的关注。通常，无机p型金属氧化物或聚合物用作空穴传输材料（HTM），这是倒置PSC中的重要成分。但是，这种类型的HTM通常需要较高的处理温度和/或较高的成本。另一方面，常用的有机HTM聚（3,4-亚乙基二氧噻吩聚苯乙烯磺酸盐（PEDOT：PSS））对湿度敏感，因此会影响PSC的稳定性，在这里，我们使用一个小分子4,4 '，4''-三（N -3-甲基苯基-N-苯基氨基）三苯胺（m- MTDATA）代替PEDOT：PSS作为用于倒置PSC的新HTM。与基于PEDOT：PSS的设备相比，m基于MTDATA的PSC具有增强的性能。最高功率转换效率（PCE）从13.44％（PEDOT：PSS）显着提高到18.12％（m- MTDATA），这表明m- MTDATA可能是实现高性能反向PSC的有效HTM。此外，与基于PEDOT：PSS的设备（保持40％的PCE）相比，基于m MTDATA的设备在1000小时的环境条件下具有更高的稳定性（保持90％的PCE）。