Abstract
In this work, two different benzotriazole derivatives (BTAZT and BTAZF) have been chosen as co-acceptors with a BDTT donor to build a new random D-A copolymer (PBTAZT-F) for polymer solar cells. Compared with two mono-acceptor (BTAZT or BTAZF) based homogeneous copolymers (PBTAZT and PBTAZF) as well as their physical-blend polymer (PBTAZT/PBTAZF), PBTAZT-F shows much broader absorption band with a larger full-width half-maxima (FWHM) in 400–750 nm due to good complementary of the intramolecular charge transfer absorption from two kinds of D-A structures in single unit, indicating that it can exhibit more efficient light-capturing ability in the visible region. PBTAZT-F based device shows the highest Jsc among all the polymers, which is attributed to its broad absorption as well as relatively large and balanced charge transport. Thus, it gives the best PCE of 5.58% with a Jsc of 11.28 mA cm−2, a Voc of 0.84 V and a FF of 58.60%.
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.
