Boosting the efficiency of organic solar cells via dual non-fullerene acceptors

• Published in: Dyes and pigments 2023-11, Vol.219, p.111493, Article 111493
• Main Authors: Cao, Ziliang, Liao, Qiaogan, Zhang, Zheling, Huang, Tianhuan, Deng, Zhengqi, Guan, Hao, Geng, Shuang, Wang, Dongjie, Zhang, Jian
• Format: Article
• Language: English
• Subjects: Light-harvesting; Nanofiber structure; Non-fullerene; Small molecule acceptor; Ternary OSCs
• ISSN: 0143-7208; 1873-3743
• DOI: 10.1016/j.dyepig.2023.111493

To prepare high-performance organic solar cells (OSCs), incorporating a third component into the binary blend is a feasible and convenient strategy. Here, IDIC, a non-fullerene small molecule acceptor with medium bandgap and good compatibility, was added to the PM6:BTP-eC9 system to prepare high-performance ternary OSCs. The good absorption, compatibility and energy level of IDIC can contribute to enhance light-harvesting, obtain better nanofiber structures, promote the exciton dissociation and charge transport, and suppress recombination. Finally, the optimized ternary OSCs achieves a high power conversion efficiency (PCE) up to 18.53%, which is higher than that of the binary system (17.09%). Additionally, IDIC was also used as a third component to build efficient OSCs in other binary systems and achieved enhanced photovoltaic performance. This work proves that selecting a third component having appropriate absorption and good compatibility to fabricate high-performance ternary OSCs is an effective and convenient strategy. [Display omitted] •The optimized ternary OSCs achieves a desirable PCE up to 18.53%.•Acceptor with medium bandgap and good compatibility.•Energy transfer and alloy state model existed between IDIC and BTP-eC9.•Exciton dissociation and the charge transport, and suppress recombination.