As an important approach to commercialize organic solar cells (OSC), research on solution-processable and low-cost interfacial materials with universal applicability has attracted much attention. In this work, three new non-conjugated small-molecules electrolytes (NCSMEs) with silicon as the core atom and sulfonate ion as the terminal group were synthesized, which were further applied as cathode interlayers (CILs) in non-fullerene and fullerene based OSCs. As the result, the power conversion efficiency (PCE) of 15.57% for non-fullerene PM6:Y6-based and 8.96% for fullerene PTB7:PC₇₁BM-based device was obtained, respectively. The improved performance was mostly attributed to the NCSMEs CILs which could mediate the energy barrier to form a better ohmic contact, enhance the charge transmission and collection efficiency, and decrease the charge recombination. It is noteworthy that the synthesized CILs could provide a new strategy for the potential applications of low-cost and highly efficient OSCs.

作为有机太阳能电池（OSC）商业化的重要方法，具有通用性的可溶液加工和低成本界面材料的研究引起了广泛关注。在这项工作中，合成了三种新型的以硅为核心原子和磺酸根离子为末端基团的非共轭小分子电解质（NCSMEs），并将其进一步用作基于非富勒烯和富勒烯的OSC的阴极中间层（CIL）。 。结果，基于非富勒烯PM6：Y6的功率转换效率（PCE）为15.57％，对于富勒烯PTB7：PC ₇₁的功率转换效率为8.96％分别获得了基于BM的设备。性能的提高主要归因于NCSMEs CIL，它们可以介导能垒以形成更好的欧姆接触，提高电荷传输和收集效率并减少电荷重组。值得注意的是，合成的CIL可以为低成本和高效OSC的潜在应用提供新的策略。