Population dynamics of multiple triplet excitons revealed from time-dependent fluorescence quenching of single conjugated polymer chains.

ABSTRACT: The advent of multiple exciton harvesting schemes and prolonging exciton lifetimes to improve performance attributes of solar cells based on conjugated organic materials presents some interesting challenges that must be overcome in order to realize the full potential of these strategies. This is especially important for applications involving multi-chromophoric conjugated polymers where interactions between multiple spin-forbidden triplet excitons can be significant and are mediated by chain conformation. We use single molecule spectroscopic techniques to investigate interactions between multiple triplet excitons and emissive singlets by monitoring time-dependent fluorescence quenching on time scales commensurate with the triplet lifetime. Structurally related conjugated polymers differing

SUBMITTER: Datko BD 

PROVIDER: S-EPMC6349865 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature