In this study we prepared four benzodithiophene (BDT)-based small organic molecules presenting bithiophene (TT), thiophene (FT), carbazole (CB), and triphenylamine (TPA) units, respectively, as termini, and used them as hole transporting materials for perovskite solar cells (PSCs). The high degrees of planarity of these BDT-based small molecules imparted them with high degrees of stacking and charge transport. These small molecules had suitable optical properties and energy level alignments for use in PSCs based on MAPbI₃, with compact-TiO₂ as the electron transporting layer and a BDT-based material as the hole transporting layer, in a n–i–p structure. Among our tested BDT-based materials, the PSC incorporating BDT-TT had the best performance, with an average power conversion efficiency of 13.63%.

在这项研究中，我们制备了四个基于苯并二噻吩（BDT）的有机小分子，分别以噻吩（TT），噻吩（FT），咔唑（CB）和三苯胺（TPA）单元作为末端，并将其用作空穴传输材料用于钙钛矿太阳能电池（PSC）。这些基于BDT的小分子的高度平面性赋予了它们高度的堆叠和电荷传输能力。这些小分子具有适合的光学性质和能级排列，可用于基于MAPbI _3的PSC中，其中紧密的TiO ₂作为电子传输层，而BDT基材料作为空穴传输层，处于an-i-p结构。在我们经过测试的基于BDT的材料中，包含BDT-TT的PSC 性能最佳，平均功率转换效率为13.63％。