Accession Number:

ADA330160

Title:

Spatially and Temporally Resolved Emission from Aggregates in Conjugated Polymers

Descriptive Note:

Technical rept.

Corporate Author:

OHIO STATE UNIV COLUMBUS DEPT OF PHYSICS

Report Date:

1997-09-20

Pagination or Media Count:

16.0

Abstract:

We present results of ew, time-resolved and spatially resolved spectroscopic studies of emission and absorption in a model conjugated polymer, poly p-pyridyl vinylene PPyV. The redshifted film spectra suggest the formation of aggregated regions. The approx. 4x reduction in emission efficiency in films vs. solution is attributed to a longer radiative lifetime for aggregate excitons, as is evidenced by time-resolved fluorescence measurements. We present the first direct optical imaging of aggregates in a conjugated polymer via near-field scanning optical microscopy NSOM. The aggregate emission and absorption are found to be localized to partially aligned regions of the film approx. 200 nm in size.

Subject Categories:

  • Polymer Chemistry
  • Atomic and Molecular Physics and Spectroscopy
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE