A distorted lactam unit with intramolecular hydrogen bonds as the electron donor of polymer solar cells
作者:Hua-Chun Wang、Minrun Ren、Jian Cao、Hong-Bo Yin、Guichuan Zhang、Jingyang Xiao、Xiancheng Ren、Hin-Lap Yip、Yun-Xiang Xu
DOI:10.1039/c9tc04014e
日期:——
A novel distorted lactam motif, namely 4,4′-dialkyl-[6,6′-bithieno[3,2-b]pyridine]-5,5′(4H,4′H)-dione (BTP), could lock itself by intramolecular hydrogen bonds. In view of the potential of the motif, two D–A conjugated polymers, PBDT-BTP-HD and PBDT-BTP-OD, with two different long side chains consisting of 4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-b:4,5-b′]dithiophene (BDT) as a donor unit and
一种新颖的扭曲内酰胺基序,即4,4'-二烷基[6,6'- bithieno并[3,2- b ]吡啶] -5,5'(4 ħ,4' ħ) -二酮(BTP),能通过分子内氢键锁定自身。考虑到图案的潜力,两种D–A共轭聚合物PBDT-BTP-HD和PBDT-BTP-OD,具有两个不同的长侧链,分别由4,8-双(5-(2-乙基己基)噻吩组成-2-基)苯并[1,2- b:4,5- b设计合成了']二噻吩(BDT)作为供体单元和BTP作为受体单元。此外,还研究了两种聚合物的光物理,电化学和光伏性质。还研究了纯聚合物和共混膜的形态和分子有序性,以将侧链结构与聚集态和器件参数相关联。基于PBDT-BTP-OD和IT-M的设备,由于构建模块和侧链工程的协同作用,其功率转换效率高达9.54%。结果,成功地证明了新型扭曲的内酰胺BTP是有机太阳能电池中有希望的组成部分。