The use of hydrophobic dopant is paramount for the success of organic semiconductors. Here we demonstrate the use of an N-heterocyclic hydrophobic ionic liquid, 1-butyl-3-methylpyridinium bis(trifluoromethylsulfonyl)imide (BMPyTFSI), to induce dual functionality: as p-type dopant and as additive for state-of-the-art Spiro-OMeTAD hole-transporting material (HTM). This ionic liquid doped HTM was then implemented for perovskite solar cell fabrication and delivered competitive results. The dopant has the ability to substitute state-of-the-art ultra-hygroscopic lithium salt (LiTFSI) and problematic 4-tert-butylpyridine (t-BP) additive. BMPyTFSI was found to increase the conductivity of Spiro-OMeTAD and its use as dopant in HTM reduces charge recombination, improves the film formation by reducing the pinholes on the HTM surface, and allows fabrication of efficient devices. Competitive air stability of solar cells in comparison with their state-of-the-art dopant was found, and these findings open up a broad range of organic semiconductors for hydrophobic ionic liquid-based doping.

疏水掺杂剂的使用对于有机半导体的成功至关重要。在这里，我们证明了使用N杂环疏水离子液体双（三氟甲基磺酰基）亚胺1-丁基-3-甲基吡啶鎓（BMPyTFSI）来诱导双重功能：作为p型掺杂剂和作为状态添加剂的用途先进的Spiro-OMeTAD空穴传输材料（HTM）。然后将这种离子液体掺杂的HTM用于钙钛矿型太阳能电池的制造，并提供了具有竞争力的结果。掺杂剂具有替代最新的超吸湿锂盐（LiTFSI）和有问题的4-叔丁基吡啶（t-BP）添加剂。发现BMPyTFSI可以提高Spiro-OMeTAD的电导率，其在HTM中用作掺杂剂可减少电荷复合，通过减少HTM表面的针孔来改善成膜，并允许制造高效的器件。与最先进的掺杂剂相比，发现了太阳能电池具有竞争性的空气稳定性，这些发现为疏水性离子液体基掺杂开辟了广泛的有机半导体。