Side-chains Engineering of Conjugated Polymers toward Additive-free Non-fullerene Organic Solar Cells

• 作者: Feng Liu Dan Wang Jun-Yu Li Cheng-Yi Xiao Yong-Gang Wu Wei-Wei Li Guang-Sheng Fu
• 来源期刊: 高分子科学（英文版）
• 年，卷（期）: 2021,（1）
• 所属期刊栏目: ARTICLES
• 页码范围: 43-50
• 页数: 8页
• 语种: 英文

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-1 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.