Abstract
Abstract Two novel asymmetric organic small molecules of IT(2FBT-T3Cz)2 and IT(2FBT-TT3Cz)2 with an indenothiophene (IT) central donor core, fluorinated benzothiadiazole (2FBT) as acceptor and 3-carbazole (Cz) unit as terminal group were designed and synthesized as the donor materials in organic solar cells (OSCs). The thermal, optical absorption, electrochemical property, hole–electron mobility, film morphology were thoroughly studied. Using PC71BM as an electron acceptor, without any additive and thermal annealing (TA) treatment, the IT(2FBT-T3Cz)2-based cells showed a promising power conversion efficiency (PCE) of 5.81% and the IT(2FBT-TT3Cz)2-based cells exhibited a PCE of 4.39%. Our results demonstrate that the IT-based asymmetric small molecules can be developed as a promising class of donor materials for high-performance OSCs.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.