Abstract
In this work, we elucidate exciton structure, dynamics, and charge generation in the solution phase aggregates of a low-bandgap donor-acceptor polymer, poly(4,8-bis-alkyloxybenzo[1,2-b:4,5-b']dithiophene-2,6-diyl-alt-(alkylthieno[3,4-b]thiophene-2carboxylate)-2,6-diyl (PBDTTT). The polymer aggregates in the solution phase serve as precursors for thin film morphologies. We have identified intrachain and interchain exciton transitions and resolved their relaxation pathways by comparing excitons in solution aggregates to those in isolated polymer chains. Hot intrachain excitons have led to the generation of stabilized interchain charge-separated states in solution aggregates, which could serve as the intermediate state to the hot exciton charge separation in bulk heterojunctions (BHJs). These results have important implications for controlling morphology dependent exciton dynamics in solution processed BHJs.
Published Version
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.
