Fluorescence quenchers in mixed phase polyfluorene films

Bansal, Ashu K., Ruseckas, Arvydas, Shaw, Paul E. and Samuel, Ifor D. W. (2010) Fluorescence quenchers in mixed phase polyfluorene films. Journal of Physical Chemistry C, 114 41: 17864-17867. doi:10.1021/jp105545r

Author Bansal, Ashu K.
Ruseckas, Arvydas
Shaw, Paul E.
Samuel, Ifor D. W.
Title Fluorescence quenchers in mixed phase polyfluorene films
Journal name Journal of Physical Chemistry C   Check publisher's open access policy
ISSN 1932-7447
Publication date 2010-10
Sub-type Article (original research)
DOI 10.1021/jp105545r
Volume 114
Issue 41
Start page 17864
End page 17867
Total pages 4
Place of publication Washington, DC, United States
Publisher American Chemical Society
Language eng
Abstract Fluorescence quenching dynamics were studied in poly(9,9-dioctylfluorene) films with a wide range of β-phase concentrations. Measurements of time-resolved fluorescence and fluorescence quantum yield showed that the radiative decay rate was independent of the β phase content, whereas the nonradiative decay rate was found to be higher in β-phase rich films. The trend was analyzed in terms of diffusion-mediated excitation energy transfer to quenchers. The concentration of fluorescence quenchers is found to be less than 0.01% of the number of fluorene repeat units and independent of the fraction of the film in the β phase. The results suggest that fluorescence quenching is predominantly by chemical defects rather than by excimer formation.
Keyword Beta-Phase
Conjugated Polymers
Defect Emission
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Chemistry and Molecular Biosciences
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