5H-dithieno[3,2-b∶2',3'-d]pyran-5-one unit yields efficient wide-bandgap polymer donors

• 来源期刊: 科学通报（英文版）
• 年，卷（期）: 2019,（22）
• 页码范围: 1655-1657
• 页数: 3页
• 语种: 英文

摘要

Recently,great progress has been made in organic solar cells due to the emergence of high-performance nonfullerene acceptors [1-6].Over 16％ and 17％ power conversion efficiencies (PCEs) were achieved for nonfullerene-acceptor-based single-junction and tandem cells,respectively [7,8].Owing to complementary light absorption,wide-bandgap donor-acceptor (D-A) copolymers are ideal electron-donating partners for nonfullerene acceptors.