Impedance spectroscopy of a poly(p-phenylenevinylene)-based light-emitting diode device

S. H. Kim, J. W. Jang, K. W. Lee, Cheol Eui Lee, S. W. Kim

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

A poly-p-phenylenevinylene (PPV)-based light-emitting diode (LED) device was studied by means of comprehensive ac impedance measurements. Separate regions of frequency-dependent responses, the bulk and depleted (interface) regions, with distinct electrical properties, were identified and characterized. The ac J-E characteristics revealed the space-charge limited conduction mechanism, which was specifically assigned to the depleted region. Besides, a direct estimate of the trap density in the bulk region was obtained from the applied voltage dependence of the charge concentration.

Original languageEnglish
Pages (from-to)143-146
Number of pages4
JournalSolid State Communications
Volume128
Issue number4
DOIs
Publication statusPublished - 2003 Oct

Bibliographical note

Funding Information:
This work was supported by the KISTEP (National Research Laboratory and Proton Accelerator User Program No. M102KS010001-02K1901-01814) and by the Brain Korea 21 Project in 2003.

Keywords

  • A. Polymers, elastomers, and plastics
  • D. Dielectric response
  • D. Electronic transport

ASJC Scopus subject areas

  • General Chemistry
  • Condensed Matter Physics
  • Materials Chemistry

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