Singlet-triplet and triplet-triplet interactions in conjugated polymer single molecules

Article Abstract:

Single molecule fluorescence correlation spectroscopy is used to investigate the photodynamics of isolated single multichromophoric polymer chains of the conjugated polymers MEH-PPV and F8BT on the microsecond to millisecond time scale. Correlation spectroscopy of MEH-PPV molecules in a multilayer device environment reveals that triplet excitons are efficiently quenched by hole polarons.

Usage, Fluorescence, Optical properties

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Single molecule modulation spectroscopy of conjugated polymers

Article Abstract:

A new single molecule spectroscopy approach for the investigation of triplet-triplet and single-triplet interactions in conjugated polymers is described. The technique involves the irradiation of isolated single, mulitchromophoric, conjugated polymer molecules by a repetitive sequence of variable-intensity microsecond time scale excitation pulses.

Analysis, Irradiation, Molecular spectroscopy, Irradiation (Radiation exposure)

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Structural and electronic characterization of chemical and conformational defects in conjugated polymers

Article Abstract:

Quantum chemical analyses of poly (p-phenylenevinylene) (PPV)-based polymers with conformational and chemical defects are presented. It is shown that defects leading to tetrahedral kinks in the polymerization direction that were proposed to explain the optical anisotropy of polymer films are energetically stable.

Quantum chemistry, Structure, Phenyl group

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