Novel pendent thiophene side‐chained benzodithiophene for polymer solar cells |
| |
| Authors: | Manjun Xiao Chunyang Gu Tong Hu Junzhen Ren Mingliang Sun Renqiang Yang |
| |
| Affiliation: | 1. CAS Key Laboratory of Bio‐Based Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, People's Republic of China;2. Institute of Materials Science and Engineering, Ocean University of China, Qingdao, People's Republic of China |
| |
| Abstract: | In this article, pendent thiophene (2‐butyl‐5‐octylthiophene) side chain is used to modify the backbone of the polymers containing benzo[1,2‐b:4,5‐b′]dithiophene (BDT) and thieno[3,4‐c]pyrrole‐4,6‐dione (TPD). Compared with the dodecyloxy side‐chained polymer (P1), pendent thiophene‐based polymers (P2 and P3) show similar number‐average molecular weight (Mn), polydispersity index, thermal stability (Td ～ 334–337 °C), and optical band gaps (  ) (～1.8 eV). Polymer (P2)‐based BDT with pendent thiophene and ethylhexyl‐modified TPD shows relatively low‐lying HOMO energy level (?5.52 eV) and nearly 1 V high open circuit voltage (VOC). The polymer solar cell devices based on three copolymers show power conversion efficiencies from 2.01% to 4.13%. The hole mobility of these polymers tested by space charge limited current method range from 3.4 × 10?4 to 9.2 × 10?4 cm2V?1s?1. © 2015 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2015 , 53, 1558–1566 |
| |
| Keywords: | benzo[1,2‐b:4,5‐b′ ]dithiophene pendent thiophene polymer solar cells thieno[3,4‐c]pyrrole‐4,6‐dione |
|
|
