Thiophene-Linked Polyphenylquinoxaline: A New Electron Transport Conjugated Polymer for Electroluminescent Devices

Abstract

A new n-type conjugated polymer, poly2,2'-(THIOPHENE-2,5-DIYL)-6,6'-BIS(3-PHENYLQUINOXALINE) (PTQx), was synthesized, characterized, and shown to be an excellent electron transport polymer for electroluminescent devices. PTQx thin films had a reversible electrochemical reduction but an irreversible oxidation, confirming its n-type nature. Electron affinity and ionization potential of PTQx thin films were estimated from cyclic voltammetry to be 3.0 and 5.54 eV, respectively. Poly(phenylene vinylene) (PPV) based light emitting diodes using PTQx as an electron transport layer, ITO/PPV/PTQx/Al, combined low turn-on voltage (3.6 eV) and high brightness (710 cd/sq m) with good efficiency (0.4%). The performance of PTQx as an electron transport material in electroluminescent devices was found to be far superior compared to all previously reported n-type polymers.

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Document Details

Document Type
Technical Report
Publication Date
Aug 16, 1999
Accession Number
ADA367004

Entities

People

  • Samson A. Jenekhe
  • Xuejun Zhang
  • Yuanting Cui

Organizations

  • University of Rochester

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Absorption
  • Abstracts
  • Alcohols
  • Chemical Engineering
  • Chemical Synthesis
  • Chemistry
  • Conjugated Polymers
  • Films
  • Formic Acid
  • Luminance
  • Macromolecules
  • Materials
  • New York
  • Organic Chemistry
  • Phase Transformations
  • Polymers
  • Thin Films

Fields of Study

  • Chemistry
  • Materials science

Readers

  • Electrochemical Surface Science
  • Polymer Science and Technology
  • Thin Film Deposition Science.

Technology Areas

  • Microelectronics