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

Personal Author(s):

• Blatchford, J. W.
• Gustafson, T. L.
• Epstein, A. J.
• Vanden Bout, D. A.
• Kerimo, J.

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.

Descriptors:

• *EMISSION
• *FLUORESCENCE
• *SPECTROSCOPY
• *POLYMERS
• MEASUREMENT
• RADIATION
• MODELS
• FILMS
• OPTICAL IMAGES
• MICROSCOPY
• SPECTRA
• AGGREGATES(MATERIALS)
• OPTICAL ANALYSIS
• ABSORPTION
• OPTICAL SCANNING
• NEAR FIELD
• EXCITONS

Subject Categories:

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

Distribution Statement:

APPROVED FOR PUBLIC RELEASE