Switching between H- and J-type electronic coupling in single conjugated polymer aggregates

• DOI: 10.1038/s41467-017-01773-0
• Publication Date: 2017-11-15T14:59:08Z
• Authors: Theresa Eder; Thomas Stangl; Max Gmelch; Klaas Remmerssen; Dirk Laux; Sigurd Höger; John M. Lupton; Jan Vogelsang
• Keywords: Chromophore

The aggregation of conjugated polymers and electronic coupling chromophores play a central role in the fundamental understanding light charge generation processes. Here we report that predominant isolated aggregates can be switched reversibly between H-type J-type by partially swelling drying aggregates. Aggregation is identified shifts photoluminescence energy, changes vibronic peak ratio, lifetime. This experiment unravels internal structure aggregate highlights importance process final spectroscopic properties. after tuned changing side chains polymer, but also entirely suppressed. types correlate with chain morphology, which quantified excitation polarization spectroscopy efficiency interchromophoric energy transfer revealed degree single-photon emission.