Pairing 1D/2D-conjugation donors/acceptors towards high-performance organic solar cells. (19th December 2018)

• Record Type: Journal Article
• Authors: Wang, Jiayu; Xiao, Yiqun; Wang, Wei; Yan, Cenqi; Rech, Jeromy; Zhang, Mingyu; You, Wei; Lu, Xinhui; Zhan, Xiaowei
• Is Part Of: Materials chemistry frontiers. Volume 3:Number 2(2019)
• Page Start: 276
• Page End: 283
• Publication Date: 2018-12-19
• Subjects: Materials science -- Periodicals; Chemistry -- Periodicals; 540
• DOI: 10.1039/c8qm00512e
• Languages: English
• ISSNs: 2052-1529

Abstract

Abstract : 1D conjugated donorFTAZ, 2D conjugated donorJ71, 1D conjugated acceptorITIC1, and 2D conjugated acceptorITIC2 were used to investigate the effects of conjugation dimension on the performance of organic solar cells. Abstract : Two polymer donors, FTAZ andJ71, and two fused-ring electron acceptors, ITIC1 andITIC2, are used to investigate the effects of conjugation dimension on the performance of organic solar cells (OSCs).FTAZ andJ71, andITIC1 andITIC2 share the same molecular backbone, respectively, whileJ71 andITIC2 possess conjugated thienyl side chains. The addition of conjugated side chains slightly red-shifts the absorption spectra and lowers the bandgap due to the extended 2D conjugation. Conjugated side chains on the acceptor induce the self-aggregation of the acceptors, while conjugated side chains on the donor increase the miscibility of the donors and acceptors, thus optimizing the morphology of the active layers. The blends based on mixed combinations, namely 1D donor/2D acceptor and 2D donor/1D acceptor, show better performance relative to 1D donor/1D acceptor and 2D donor/2D acceptor.