Spatially and Temporally Resolved Emission from Aggregates in Conjugated Polymers

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.

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Document Details

Document Type
Technical Report
Publication Date
Sep 20, 1997
Accession Number
ADA330160

Entities

People

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

Organizations

  • Ohio State University

Tags

DTIC Thesaurus Topics

  • Absorption
  • Chemistry
  • Conjugated Polymers
  • Diffraction
  • Dye Lasers
  • Efficiency
  • Emission
  • Fluorescence
  • Light Emitting Diodes
  • Luminescence
  • Materials
  • Measurement
  • Near Field
  • Optical Properties
  • Polymers
  • Quantum Yields
  • Spectra

Fields of Study

  • Physics

Readers

  • Nanoscale Plasmonic Nanotechnology
  • Polymer Science and Technology
  • Spectroscopy.

Technology Areas

  • Microelectronics