The morphological dependence of charge transport in a soluble luminescent conjugated polymer

Czek Haan Tan, AR Inigo, Wunshain Fann, Pei-Kuen Wei, Gung-Yeong Perng, Shaw-An Chen

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

Charge transport in poly[2-methoxy-5-(2'-ethyl-hexyloxy)-1,4-phenylene vinylene] is studied by employing the time-of-flight technique. Film morphology plays a key role in determining the charge transport properties. Samples prepared from toluene feature non-dispersive transport. However, after thermal annealing, charge transport is no longer nondispersive and hole mobility drops for about one order of magnitude. Near-field scanning optical microscope images show that annealing enhanced film inhomogeneity. We propose that the inhomogeneity is responsible for the changes in the transport properties.

Original languageEnglish
Pages (from-to)81-88
Number of pages8
JournalOrganic Electronics
Volume3
Issue number2
DOIs
Publication statusPublished - Jun 2002

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Keywords

  • luminent conjugated polymers
  • Poly(p-phenylene vinylene)s
  • hole mobility
  • interchain interactions
  • aggregation
  • efficiency
  • performance
  • morphology
  • molecularly doped polymers
  • film morphology
  • time-of-flight
  • nondispersive hole transport
  • near-field optical microscopy
  • MEH-PPV
  • carrier mobility
  • light-emitting-diodes

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