Thiophene π bridge effect on bulky side‐chained benzodithiophene‐based photovoltaic polymers |
| |
| Authors: | Weiye Chen Mingliang Sun Huilin Zheng Jing Ren Renqiang Yang |
| |
| Affiliation: | 1. Institute of Materials Science and Engineering, Ocean University of China, Qingdao, People's Republic of China;2. CAS Key Laboratory of Bio‐Based Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, People's Republic of China |
| |
| Abstract: | Recently, we have used terthiophene side chain to modify benzo1,2‐b:4,5‐b′]dithiophene (BDT) to form novel building block for BDT polymers. In this paper, this building block is used to copolymerized with thieno3,4‐c]pyrrole‐4,6‐dione (TPD) and thieno3,4‐b]thiophene (TT). This building block and TPD‐ or TT‐based polymers (P1 and P3) show high open circuit voltage (VOC) (ca. 0.9–0.95 V) and low energy loss (Eg–eVOC) in solar cells devices compared with similar polymers without bulky side chain. We further introduce thiophene π bridge into these polymers backbone to form two other polymers (P2 and P4). We find this thiophene π bridge does contribute to this bulky side chained benzodithiophene polymer photovoltaic performances, especially for power conversion efficiencies (PCEs). The polymer solar cells (PSCs) performances are moderate in this article due to the serious aggregation in the PSCs active layer. © 2015 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2016 , 54, 1615–1622 |
| |
| Keywords: | bulky side chain copolymerization energy loss high performance polymers morphology polymer solar cells renewable resources thin films thiophene π bridge |
|
|
