Step-by-step improvement in photovoltaic properties of fluorinated quinoxaline-based low-band-gap polymers
作者:Sella Kurnia Putri、Yun Hwan Kim、Dong Ryeol Whang、Min Seok Lee、Joo Hyun Kim、Dong Wook Chang
DOI:10.1016/j.orgel.2017.04.025
日期:2017.8
3-positions, and both locations to afford PBDT-QxF, PBDT-FQx, and PBDT-FQxF, respectively. Because of significant contributions from the fluorine atoms, these polymers display quite differentiated optical and electrochemical properties in comparison with those of their non-fluorinated counterpart, PBDT-Qx. In addition, a gradual improvement in power conversion efficiencies (PCEs) is observed in the order of
通过Stille偶联反应合成了一系列具有典型供体-π-受体构型的氟化喹喔啉类聚合物。供电子的二烷氧基取代的苯并二噻吩(BDT)通过噻吩桥与吸电子的2,3-二苯基喹喔啉(DPQ)受体连接。为了研究强吸电子基团的效果,氟原子已经被系统地在上DPQ单元的各种位置,如6,7-位置时,结合对位上的2,3-位上的苯基取代基的位上,和两个地方都可以买到PBDT-QxF,PBDT-FQx和PBDT-FQxF, 分别。由于氟原子的显着贡献,与它们的非氟化对应物PBDT-Qx相比,这些聚合物显示出截然不同的光学和电化学性质。此外,当采用以下配置的倒置型聚合物太阳能电池(PSC)时,功率转换效率(PCE)逐渐以PBDT-Qx,PBDT-QxF,PBDT-FQx和PBDT-FQxF的顺序改善。制备了ITO / ZnO /聚合物:PC 71 BM / MoO 3 / Al。特别是PBDT-FQxF,在6,7位和对位上有四个氟原子在DPQ的2