Size-dependent spectroscopic properties of conjugated polymer nanoparticles

John K. Grey, Doo Young Kim, Brent C. Norris, William L. Miller, Paul F. Barbara

Research output: Contribution to journalArticlepeer-review

119 Scopus citations


This paper is focused on how the spectroscopic properties of conjugated polymers evolve in the size range between single polymer chains and the bulk material. The measurements used single-particle spectroscopy techniques and include both static and dynamic measurements. The main observation of this work is that the spectroscopic properties of MEH-PPV evolve rapidly as a function of nanoparticle size and achieve bulk-like properties for nanoparticles greater than 10 nm in size. Nanoparticles were assembled by a reprecipitation technique and characterized by fluorescence emission spectroscopy. The physical origin of the size-dependent spectroscopic properties is assigned to the distance dependence of four main processes: electronic energy transfer between blue and red sites, triplet-triplet annihilation, singlet exciton quenching by triplets, and singlet exciton quenching by hole polarons.

Original languageEnglish
Pages (from-to)25568-25572
Number of pages5
JournalJournal of Physical Chemistry B
Issue number51
StatePublished - Dec 28 2006

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry


Dive into the research topics of 'Size-dependent spectroscopic properties of conjugated polymer nanoparticles'. Together they form a unique fingerprint.

Cite this