Abstract
The working horses for the drastically improved power conversion efficiency (PCE) of organic solar cells (OSCs) were the small-band-gap molecular non-fullerene acceptors. This development not only removed the low performance obstacle for OSCs but also raised needs for wide-band-gap polymers for donor/acceptor mix with complimentary absorptions. Benzodithiophene (BDT) is one of the mostly used unit for constructing donor polymers. Here, we introduced one type of donor polymer with two BDT units placed perpendicularly. This exploration is aimed to reduce the complexity of molecule design, potentially to reduce the cost of donor materials. We also explored the halogenation of BDT side group to optimize the performances of the copolymers. The chlorinated donor polymer PvBDT-Cl delivered a decent PCE of 8.23% with Y6-T. This work explored the possibility of using only BDT unit to construct high performance donor polymers, which is a crucial insight for future low-cost donor polymer design.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: 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.
