Exciplex Emission from Bilayers of Poly (vinyl carbazole) and Pyridine-Based Conjugated Polymers

Abstract

We present photoluminescence and electroluminescence studies of bilayers and blends formed from poly (vinyl carbazole) (PVK) and poly (pyridyl vinylene phenylene vinylene) (PPyVPV copolymer derivatives. Bilayers of PVK and the PPyVPV) copolymers have a photoluminescence emission which cannot be assigned to either the photoluminescence of PVK or the PPyVPV layer. The blends of the two polymers show a similar new photoluminescence emission for a large range of concentrations. Absorption and photoluminescence excitation spectra confirm that the additional feature is an excited state species which resulted from an exciplex at the polymer/polymer interface. Bilayer light-emitting devices utilizing the PpyVPV copolymers show an electroluminescence spectrum consistent with emission from the exciplex. The efficiency of the bilayer devices as compared to single layer devices increases by over 3 orders of magnitudes due to the 4exciplex formation and the elimination of exciton formation near the luminescent quenching electrodes.

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Document Details

Document Type
Technical Report
Publication Date
Feb 06, 1998
Accession Number
ADA338069

Entities

People

  • Arthur J. Epstein
  • D. K. Fu
  • Darren D. Gebler
  • T. M. Swager
  • Yuanyuan Wang

Organizations

  • Ohio State University

Tags

DTIC Thesaurus Topics

  • 3-Ring Heterocyclic Compounds
  • Absorption
  • Conductive Polymers
  • Conjugated Polymers
  • Copolymers
  • Efficiency
  • Electrodes
  • Electroluminescence
  • Emission
  • Energy Bands
  • Excitation
  • Films
  • Luminescence
  • Photoluminescence
  • Polymers
  • Quantum Efficiency
  • Spectra

Fields of Study

  • Materials science

Readers

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

Technology Areas

  • Microelectronics