In this work we introduced and constructed two different ternary solar cells based on J101:MeIC host films separately blended with two distinct near-IR non-fullerene acceptors, F-IXIC and Cl-IXIC. The J101:MeIC host devices with a PCE of 11.83% were improved to 14.08% by loading 40 wt% F-IXIC, but reduced to 9.32% by loading Cl-IXIC with the same content. Notably, the J101:F-IXIC and J101:Cl-IXIC binary devices showed the comparable PCEs of 9.44% and 9.45%, respectively. Importantly, the large difference of fill factor values (70.19% for F-IXIC-based device and 50.24% for Cl-IXIC-based device) drives us to carefully analyze the working mechanisms and morphological characteristics of these two ternary systems via the physical and morphological measurements and the surface energy calculations. The investigated results suggest that the interfacial surface energy parameters of the third component and host materials should be rationally and comprehensively considered in the design of ternary systems. More importantly, combining with the investigations of the photo- and thermal-stability issues of the corresponding ternary systems, we further found that localization driving force of sensitizers partially explained in terms of surface energy can rationally control the efficiency-stability gap of ternary solar cells.

在这项工作中，我们基于J101：MeIC主膜引入并构建了两种不同的三元太阳能电池，这些膜分别与两种不同的近红外非富勒烯受体F-IXIC和Cl-IXIC混合。通过加载40 wt％的F-IXIC，PCE为11.83％的J101：MeIC主机设备提高到14.08％，但是通过加载相同含量的Cl-IXIC降低到9.32％。值得注意的是，J101：F-IXIC和J101：Cl-IXIC二元器件的可比PCE分别为9.44％和9.45％。重要的是，填充因子值的大的差异（对于基于F-IXIC装置和用于基于CL-IXIC设备50.24％70.19％）驱动器我们仔细分析工作机制和这两个三元体系的形态特征通过物理和形态测量以及表面能计算。研究结果表明，在三元体系设计中应合理，全面地考虑第三组分与基质材料的界面表面能参数。更重要的是，结合对相应三元体系的光稳定性和热稳定性问题的研究，我们进一步发现，用表面能部分解释的敏化剂的局部驱动力可以合理地控制三元太阳能电池的效率-稳定性差距。 。