Journal
NANO LETTERS
Volume 12, Issue 3, Pages 1300-1306Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl203784m
Keywords
Nanoscale tracking; conjugated polymer; carrier dynamics; hole polaron
Categories
Funding
- NSF [CHE-1058885]
- NIH [1R01GM081040]
- Division Of Chemistry
- Direct For Mathematical & Physical Scien [1058885] Funding Source: National Science Foundation
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The motion of individual charge carriers in organic nanostructures was tracked by fluorescence microscopy. A twinkling effect is observed in fluorescence microscopy of single conjugated polymer nanoparticles, that is, small displacements in the fluorescence spot of single nanoparticles of the conjugated polymer PFBT are observed over time. There is evidence that superquenching by the charge carrier induces a dark spot in the nanoparticle, which moves with the carrier, resulting in the observed displacements in the fluorescence. Zero-field mobilities of individual charge carriers consistent with highly trapped polarons were obtained from tracking experiments.
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