Charge injection in polymer light-emitting diodes

T. van Woudenbergh, P.W.M. Blom, J.N. Huiberts

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Abstract

The injection-limited hole current from Ag into poly-dialkoxy-p-phenylene vinylene (PPV) exhibits a weak dependence on temperature, in spite of the presence of a large injection barrier of 1 eV. The measured field- and temperature dependence of the hole injection is explained by a hopping model in which energetic disorder is taken into account. In a PPV-based light-emitting diode it is demonstrated that the hole injection is enhanced by the presence of electrons. As a mechanism for this enhanced hole injection an increase of the electric field at the hole injecting contact due to trapped electrons is proposed.

Original languageEnglish
Title of host publicationAdvances in Solid State Physics
PublisherSpringer
Pages495-503
Number of pages9
Volume42
DOIs
Publication statusPublished - 2002
EventSpring Meeting of the Deutsche-Physikalische-Gesellschaft - , Germany
Duration: 25-Mar-200229-Mar-2002

Other

OtherSpring Meeting of the Deutsche-Physikalische-Gesellschaft
CountryGermany
Period25/03/200229/03/2002

Keywords

  • MONTE-CARLO SIMULATION
  • POLY(P-PHENYLENE VINYLENE)
  • HOLE TRANSPORT
  • DEPENDENCE
  • ELECTRON

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