Influence of triplet excitons on the lifetime of polymer-based organic light emitting diodes

Oili Pekkola*, Andrea Gassmann, Fabian Etzold, Frédéric Laquai, Heinz Von Seggern

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

In this work, the harmful effect of triplet excitons on the lifetime of poly(p-phenylene vinylene) (PPV)-based organic light emitting diodes is demonstrated. A model system has been designed in which the triplet population in a PPV derivative is increased by blending the polymer with the triplet sensitizer platinum (II) octaethylporphyrine ketone (PtOEPK). The increase in the triplet concentration of the polymer affects both the initial decay and the long-term evolution of luminance and leads to a drastic acceleration of device degradation, reflected in a dramatically shortened lifetime.

Original languageEnglish (US)
Pages (from-to)2035-2039
Number of pages5
JournalPhysica Status Solidi (A) Applications and Materials Science
Volume211
Issue number9
DOIs
StatePublished - 2014

Keywords

  • device lifetime
  • excitons
  • organic light-emitting diodes
  • polymers

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry
  • Electrical and Electronic Engineering

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