摘要
Side-chain engineering plays a significant role in the design of conjugated materials. In this work, a series of conjugated polymers PBDB-T-R with functionalized groups at the end of side units were developed as electron donor for organic solar cells(OSCs). The donor polymers PBDB-T-I and PBDB-T-OAc with iodine and acetate end groups exhibited similar absorption and energy levels, but showed much improved PCEs in OSCs compared to the polymer PBDB-T-H without substitutions at the end groups. Additionally, we found that PBDB-T-I and PBDB-T-OAc based cells exhibited optimized performance when using chloroform as solution-processed solvent without any additives. These results indicate that these conjugated polymers can act as self-additive to fabricate photoactive layers via solution process in OSCs.
基金
financially supported by the Ministry of Science and Technology(Nos.2018YFA0208504 and 2017YFA0204702)
the National Natural Science Foundation of China(Nos.51773207,21574138,and 21905018)of China
further supported by Fundamental Research Funds for the Central Universities(No.XK1802-2)
Jiangxi Provincial Department of Science and Technology(No.20192ACB20009)。
作者简介
Corresponding authors:Wei-Wei Li,E-mail:liweiwei@iccas.ac.cn;Corresponding authors:Guang-Sheng Fu,E-mail:fugs@hbu.edu.cn。
