A readily-accessible, random perylene diimide copolymer acceptor for all-polymer solar cells. (November 2017)

• Record Type: Journal Article
• Authors: Deng, Ping; Wu, Bo; Lei, Yanlian; Zhou, Dagang; Hoi Yi Ho, Carr; Zhu, Furong; Ong, Beng S.
• Is Part Of: Dyes and pigments. Volume 146(2017)
• Page Start: 20
• Page End: 26
• Publication Date: 2017-11
• Subjects: Perylene diimide -- Copolymer acceptor -- Readily-accessible -- Random copolymer -- Regioisomeric -- All-polymer solar cells; Dyes and dyeing -- Periodicals; Pigments -- Periodicals; 667.2
• DOI: 10.1016/j.dyepig.2017.06.058
• Languages: English
• ISSNs: 0143-7208

Abstract

Abstract: A new, structurally random perylene diimide (PDI) copolymer acceptor, PPDI, has been readily synthesized from Stille cross-coupling polycondensation of two pairs of regioisomeric dibromo-PDIs with 2, 5-bis(trimethylstannyl)thiophene.PPDI possesses a complex structural configuration with a greatly twisted conformation, and thus exhibits weak intermolecular interactions. A solution ofPPDI and a polymer donor such as PBT7-Th affords a smooth homogenous film without large crystalline domain formation. This composite film absorbs strongly throughout the visible spectrum, and when used as an active layer in all-polymer solar cells, provides a power conversion efficiency of over 5%. Graphical abstract: Highlights: A new, structurally random perylene diimide copolymer acceptor, PPDI, has been readily synthesized. PPDI possesses a greatly twisted conformation and exhibits weak intermolecular interactions. The all-polymer solar cells based onPPDI/ PTB7-Th active layer provide the PCE of 5.35%.