Photochemistry and kinetics of single organic nanoparticles in the presence of charge carriers

Andre J. Gesquiere, So Jung Park, Paul F. Barbara

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


This paper describes a preliminary experimental study on charge injection in MEH-PPV polymer nanoparticles incorporated in an OLED type device. The nanoparticles have been investigated with single molecule fluorescence spectroscopy recorded simultaneously with charging and discharging of the particles. Structure and dynamics of an anion/MEH-PPV complex, proposed to be responsible for discrete photobleaching in conjugated polymers, have been investigated with this technique. Device physics and kinetics have been elucidated by using the fluorescent conjugated polymer nanoparticles as probes for detecting the presence of hole polarons, and have been related to the electrically induced oxidation and reduction of the anion/MEH-PPV complex.

Original languageEnglish
Pages (from-to)1013-1018
Number of pages6
JournalEuropean Polymer Journal
Issue number5
StatePublished - May 2004

Bibliographical note

Funding Information:
We gratefully acknowledge the National Science Foundation and the Welch Foundation for support of this research.


  • Conjugated polymers
  • Dynamics
  • Energy-transfer
  • Fluorescence
  • Modulation
  • Single molecules
  • Spectroscopy
  • Voltage


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