An organoboron compound with a wide absorption spectrum for solar cell applications. Issue 90 (27th October 2017)

• Record Type: Journal Article
• Authors: Liu, Fangbin; Ding, Zicheng; Liu, Jun; Wang, Lixiang
• Is Part Of: Chemical communications. Volume 53:Issue 90(2017)
• Page Start: 12213
• Page End: 12216
• Publication Date: 2017-10-27
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1039/c7cc07494h
• Languages: English
• ISSNs: 1359-7345

Abstract

Abstract : An organoboron compound shows two strong light absorption bands and achieves a power conversion efficiency of 7.06% as molecular acceptor. Abstract : Organoboron compounds offer new approaches to tune the electronic structures of π-conjugated molecules. In this work, an electron acceptor (M-BNBP4P-1 ) is developed by endcapping an organoboron core unit with two strong electron-withdrawing groups.M-BNBP4P-1 exhibits a unique wide absorption spectrum with two strong absorption bands in the long wavelength region ( λ max = 771 nm) and the short wavelength region ( λ max = 502 nm), which indicate superior sunlight harvesting capability. This is due to its special electronic structure, i.e. a delocalized LUMO and a localized HOMO. Prototype solution-processed organic solar cells based onM-BNBP4P-1 show a power conversion efficiency of 7.06% and a wide photoresponse from 350 nm to 880 nm.