Yang Ling-Jun, Wu Yu, Murugan Pachaiyappan, Liu Peng, Qiu Zhi-Yong, Peng Yu-Long, Li Zai-Fang, Liu Shi-Yong
Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, Department of Chemistry and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China.
China-Australia Institute for Advanced Materials and Manufacturing (IAMM), Jiaxing University, Jiaxing 314001, China.
ACS Appl Mater Interfaces. 2024 May 22;16(20):26348-26359. doi: 10.1021/acsami.4c05564. Epub 2024 May 10.
Organic solar cells (OSCs) could benefit from the ternary bulk heterojunction (BHJ), a method that allows for fine-tuning of light capture, cascade energy levels, and film shape, in order to increase their power conversion efficiency (PCE). In this work, the third components of PM6:Y6 and PM6:BTP-eC9 BHJs are a set of four star-shaped unfused ring electron acceptors (SSUFREAs), i.e., BD-IC, BFD-IC, BD-2FIC, and BFD-2FIC, that are facilely synthesized by direct C-H arylation. The four SSUFREAs all show complete complementary absorption with PM6, Y6, and BTP-eC9, which facilitates light harvesting and exciton collection. When BFD-2FIC is added as a third component, the PCEs of PM6:Y6 and PM6:BTP-eC9 binary BHJs are able to be improved from 15.31% to 16.85%, and from 16.23% to 17.23%, respectively, showing that BFD-2FIC is useful for most effective ternary OSCs in general, and increasing short circuit current () and better film morphology are two additional benefits. The ternary PM6:Y6:BFD-2FIC exhibits a 9.7% percentage of increase in PCE compared to the PM6:Y6 binary BHJ, which is one of the highest percentage increases among the reported ternary BHJs, showing the huge potential of BFD-2FIC for ternary BHJ OSCs.
有机太阳能电池（OSCs）可受益于三元体异质结（BHJ），这种方法能够对光捕获、级联能级和薄膜形状进行微调，以提高其功率转换效率（PCE）。在这项工作中，PM6:Y6和PM6:BTP-eC9 BHJs的第三种组分是一组四个星形非稠合环电子受体（SSUFREAs），即BD-IC、BFD-IC、BD-2FIC和BFD-2FIC，它们通过直接C-H芳基化简便合成。这四种SSUFREAs与PM6、Y6和BTP-eC9均表现出完全互补吸收，有利于光捕获和激子收集。当添加BFD-2FIC作为第三种组分时，PM6:Y6和PM6:BTP-eC9二元BHJs的PCEs分别能够从15.31%提高到16.85%，以及从16.23%提高到17.23%，表明BFD-2FIC总体上对最有效的三元OSCs有用，增加短路电流（）和改善薄膜形态是另外两个好处。与PM6:Y6二元BHJ相比，三元PM6:Y6:BFD-2FIC的PCE提高了9.7%，这是报道的三元BHJs中提高百分比最高的之一，显示出BFD-2FIC用于三元BHJ OSCs的巨大潜力。
