Pyridine-Based Conjugated Polymers: Photophysical Properties and Light- Emitting Diodes

Abstract

We study the photophysical properties of the pyridine-based polymers poly (p-pyridyl vinylene) (PPyV) and poly (p-pyridine) (PPy). The primary photoexcitations in the pyridine-based polymers are singlet excitons. We observe direct intersystem crossing (ISC) on picosecond timescales with the volume density of triplet excitons varying with the sample morphology (film or powder). These effects are demonstrated clearly by examining the millisecond photoinduced absorption characteristics of powder and film forms of PPyV. The pyridine-based polymers have been shown to be promising candidates for polymer light-emitting devices both the 'conventional ' diode device and symmetrically configured ac light-emitting (SCALE) device. Here we examine the role of 'insulating' layers and their interfaces with the emitting layer and electrodes in the SCALE device operation with emphasis on the central role of the polymer-polymer interfaces.

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Document Details

Document Type
Technical Report
Publication Date
Sep 20, 1997
Accession Number
ADA330192

Entities

People

  • Arthur J. Epstein
  • Darren D. Gebler
  • J. W. Blatchford
  • S. W. Jessen
  • Yuanyuan Wang

Organizations

  • Ohio State University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Absorption
  • Absorption Spectra
  • Band Gaps
  • Charge Carriers
  • Conjugated Polymers
  • Crossings
  • Electrodes
  • Electrons
  • Energy Bands
  • Excitons
  • Films
  • Materials
  • Military Research
  • Picosecond Time
  • Polymers
  • Pyridines
  • Spectra

Readers

  • Chemistry (specifically Chemical Fluorescence)
  • Polymer Science and Technology
  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.

Technology Areas

  • Microelectronics