A New Electron‐Rich Unit for Polymer Electron Acceptors: 4,4‐Difluoro‐4
<i>H</i>
‐cyclopenta[2,1‐b:3,4‐b′]dithiophene
作者:Ruyan Zhao、Yang Min、Chuandong Dou、Jun Liu、Lixiang Wang
DOI:10.1002/chem.201702303
日期:2017.7.18
4‐b′]dithiophene (fCDT) as a new electron‐rich unit to design polymer electron acceptors. Owing to the fluoro substitutes, fCDT unit exhibits downshifted LUMO energy level, diminished steric hindrance effect and strong intermolecular interaction. The resulting polymer electron acceptor exhibits low‐lying LUMO energy level and high electron mobility, as well as good all‐polymer solar cell device performance
我们报告了4,4-二氟-4 H-环戊[2,1-b:3,4-b']二噻吩(fCDT)作为设计聚合物电子受体的新型富电子单元。由于有氟代用品,fCDT单元的LUMO能级降低,位阻效应减弱,分子间相互作用强。所得的聚合物电子受体表现出较低的LUMO能级和高电子迁移率,以及良好的全聚合物太阳能电池器件性能。