当前位置: X-MOL 学术Org. Electron. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Improving the performances of all-small-molecule organic solar cells by fine-tuning halogen substituents of donor molecule
Organic Electronics ( IF 3.2 ) Pub Date : 2021-09-09 , DOI: 10.1016/j.orgel.2021.106340
Nailiang Qiu 1 , Zhenyan Xu 1 , Xiaolong Chen 1 , Ziqi Guo 2 , Xiao Wang 1 , Yaoyao Song 1 , Zixuan Xu 1 , Xiangjian Wan 2
Affiliation  

A new acceptor-donor-acceptor (A-D-A) type small molecular donor named as DRTB-CT was designed and synthesized by replacing the fluorine atoms of DRTB-FT with chlorine atoms. Such a small change plays an important role in inhibiting the strong molecular crystallinity and excessive self-aggregation in donor phase due to the larger radius of chlorine atom, which leads to optimized morphology of the active layer. Based on the same nonfullerene acceptor (F–2Cl), the optimal device of DRTB-CT exhibits a higher power conversion efficiency (PCE) of 9.05% compared with that of the fluorinated molecule (7.66%), benefiting from the increased fill factor (FF, 0.568) and short-circuit current density (Jsc, 15.07 mA cm−2). The results indicate that the introduction of chlorine atoms is an effective strategy in developing new small molecular donors with high device performances.



中文翻译:

通过微调供体分子的卤素取代基提高全小分子有机太阳能电池的性能

通过用氯原子取代DRTB-FT的氟原子,设计并合成了一种新型的受体-供体-受体(ADA)型小分子供体DRTB-CT。由于氯原子半径较大,这种小的变化在抑制供体相的强分子结晶度和过度自聚集方面起着重要作用,从而优化了活性层的形貌。基于相同的非富勒烯受体(F-2Cl),与氟化分子(7.66%)相比,DRTB-CT的最佳器件表现出更高的功率转换效率(PCE)为9.05%,这得益于填充因子的增加( FF, 0.568) 和短路电流密度 ( J sc , 15.07 mA cm -2)。结果表明,引入氯原子是开发具有高器件性能的新型小分子供体的有效策略。

更新日期:2021-09-10
down
wechat
bug