The exploration of alternative low-cost molecular hole-transporting materials (HTMs) for both highly efficient and stable perovskite solar cells (PSCs) is a relatively new research area. Two novel HTMs using the thiophene core were designed and synthesized (Z25 and Z26). The perovskite solar cells based on Z26 exhibited a remarkable overall power conversion efficiency (PCE) of 20.1%, which is comparable to 20.6% obtained with spiroOMeTAD. Importantly, the devices based-on Z26 show better stability compared to devices based on Z25 and spiroOMeTAD when aged under ambient air of 30% or 85% relative humidity in the dark and under continuous full sun illumination at maximum power point tracking respectively. The presented results demonstrate a simple strategy by introducing double bonds to design hole-transporting materials for highly efficient and stable perovskite solar cells with low cost, which is important for commercial application.

对于高效和稳定的钙钛矿太阳能电池（PSC）而言，探索低成本低成本分子空穴传输材料（HTM）是一个相对较新的研究领域。设计并合成了两个使用噻吩核的新型HTM（Z25和Z26）。基于Z26的钙钛矿太阳能电池具有20.1％的显着整体功率转换效率（PCE），与使用spiroOMeTAD获得的20.6％相当。重要的是，基于Z26的设备与基于Z25和spiroOMeTAD的设备相比，分别在黑暗中的30％或85％相对湿度的环境空气中以及在最大功率点跟踪下连续不断的阳光照射下老化时，显示出更好的稳定性。