A comparison of para, meta, and ortho-carborane centred non-fullerene acceptors for organic solar cells. Issue 12 (1st March 2023)

• Record Type: Journal Article
• Authors: Aniés, Filip; Furlan, Francesco; Qiao, Zhuoran; Pirela, Valentina; Bidwell, Matthew; Rimmele, Martina; Martín, Jaime; Gasparini, Nicola; Heeney, Martin
• Is Part Of: Journal of materials chemistry. Volume 11:Issue 12(2023)
• Page Start: 3989
• Page End: 3996
• Publication Date: 2023-03-01
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d2tc05018h
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : Unveiling the impact of different structural isomers of carborane-containing non-fullerene acceptors on optoelectronic properties and organic photovoltaic performance. Abstract : We report the first examples of carborane-containing non-fullerene acceptors (NFAs), and their use in organic photovoltaic (OPV) devices. NFAs employing an A–D–A′–D–A type design centred around a central electron withdrawing carborane unit (A′), using either para, meta, or ortho -carborane isomers are reported. We demonstrate that the nature of the isomer has a major impact on device performance, despite minor differences in optoelectronic and morphological properties, with the use of ortho -carborane resulting in the highest device efficiencies. We further show that end-group fluorination is an efficient strategy to modulate energy levels and improve device performance of such NFAs.