Exciplex Emission in Bilayer Polymer Light-Emitting Devices

Abstract

Photoluminescent and electroluminescent studies of bilayer heterojunctions formed from a poly(pyridyl vinylene phenylene vinylene) (PPyVPV) derivative and poly(vinyl carbazole) (PVK) show an emission peak which cannot be ascribed to either the PPyVPV derivative or PVK layer. Through studies of absorption and photoluminescence excitation (PLE) spectra we demonstrate that the additional feature results from an exciplex at the bilayer interface. The photoluminescence efficiency of the exciplex is greater than 20%. The electroluminescence spectrum from the bilayer devices is entirely due to exciplex emission, with internal efficiencies initially achieved exceeding 0.1%.

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Document Details

Document Type
Technical Report
Publication Date
Sep 20, 1997
Accession Number
ADA330200

Entities

People

  • 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
  • Chemistry
  • Copolymers
  • Efficiency
  • Electroluminescence
  • Emission
  • Energy Bands
  • Excitation
  • Ground State
  • Luminescence
  • Measurement
  • Photoluminescence
  • Physics
  • Polymers
  • Quantum Efficiency
  • Spectra
  • United States

Readers

  • Materials Science and Engineering.
  • Polymer Science and Technology
  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.