Tunable Multicolor Electroluminescent Polymer Devices for Full Color Displays

Abstract

Efficient light emitting diodes (LEDs) of various colors and suitable methods of their pixelation are essential to incorporating polymer LEDs into full color display systems. We have developed polymer/polymer heterojunction LEDs that exhibit multicolor emission which is tunable by the bias voltage. These LEDs are based on poly(p-phenylenevinylene) (PPV)/n-type polymer structures. ITO/PPV/polyquinoiine/Al diodes fabricated under ambient air environment had a turn-on voltage of 3.5 V, luminance levels of over 800 cd/sq m, and efficiencies of up to 1%. Such devices, for example, reversibly switch colors (red -- yellow --green) in the 5-12 V range, facilitating easy pixelation. Origin of the color tunability will be discussed.

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Document Details

Document Type
Technical Report
Publication Date
Aug 16, 1999
Accession Number
ADA366990

Entities

People

  • Samson A. Jenekhe
  • Xuejun Zhang

Organizations

  • University of Rochester

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Chemical Engineering
  • Chemistry
  • Color Displays
  • Conductive Polymers
  • Conjugated Polymers
  • Display Systems
  • Efficiency
  • Heterojunctions
  • Luminance
  • Military Research
  • New York
  • Polymers
  • Semiconductors
  • Spectra
  • Thin Films
  • United States
  • United States Government

Readers

  • Human-Computer Interaction (HCI).
  • Integrated Circuit Design and Technology.
  • Polymer Science and Technology