Developing high‐performance hole transporting materials (HTMs) is one of the hottest topics to enhance both efficiency and stability in perovskite solar cells (PSCs). One tetraphenylbenzidine (TPB) based HTM, XY1, was designed and synthesized. XY1 exhibits suitable thermal stability, film‐forming property, and hole mobility. Notably, a power conversion efficiency (PCE) of 13.23 % under 100 mW cm⁻² AM 1.5G illumination is obtained from cells by using XY1 as HTM. Moreover, the unsealed device based on XY1 maintains its initial PCE for 600 h when aged under ambient air of 40% relative humidity in the dark and dropped by 30.2% after 480 h under continuous operation at 1‐sun illumination in ambient air, respectively, which is much better than devices based on Spiro‐OMeTAD. The results demonstrate a simple molecular engineering strategy to design TPB based hole‐transporting materials for highly stable perovskite solar cells, which is important for commercial application.

中文翻译：

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通过不含掺杂剂的四苯基联苯胺基空穴传输材料增强钙钛矿太阳能电池的稳定性

研发高性能空穴传输材料（HTM）是提高钙钛矿太阳能电池（PSC）效率和稳定性的最热门话题之一。设计并合成了一种基于四苯基联苯胺（TPB）的HTM，XY1。XY1具有合适的热稳定性，成膜性和空穴迁移率。值得注意的是，在100 mW cm ^-2下，功率转换效率（PCE）为13.23％通过使用XY1作为HTM从单元获得AM 1.5G照明。此外，基于XY1的未密封设备在黑暗中在相对湿度为40％的环境空气中老化时可保持其初始PCE达600小时，而在环境空气中在1太阳光照下连续运行480 h后则分别下降30.2％，这比基于Spiro-OMeTAD的设备要好得多。结果证明了一种简单的分子工程策略，可为高稳定性钙钛矿太阳能电池设计基于TPB的空穴传输材料，这对商业应用至关重要。