Effect of Molecular Structures of Donor Monomers of Polymers on Photovoltaic Properties.

ABSTRACT: This work investigates the photovoltaic properties of polymers that include different carbazole blocks as electron donors (D) but the same benzothiadiazole derivative as the electron acceptor (A). Five D-A copolymers are studied with ultrafast intramolecular exciton splitting and recombination dynamics to acquire the single-molecule structure and their photovoltaic performance relationship. The photovoltaic parameters such as energy level, optical band gap, and light-harvesting ability are highly dependent on the molecular structure of the donor monomer (including their appended flexible alkyl chain). Branched or linear alkyl groups on the same D block obviously vary the polymer steady-state absorption spectra and film morphology. For organic solar cells, this work allows tuning and contro

SUBMITTER: Qin R 

PROVIDER: S-EPMC6868602 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature