Blending MEH-PPV conjugate polymers with single-walled carbon nanotubes for polymer light-emitting diodes

Sung Pyo Lee, H. Choi, Kyu Won Lee, Kyu Hyun Mo, Jae Won Jang, Eunmo Lee, In Mook Kim, Cheol Eui Lee

Research output: Contribution to journalReview articlepeer-review

13 Citations (Scopus)

Abstract

We report the effects of blending poly[2-methoxy-5-(2′-ethyl- hexyloxy)-p-phenylene-vinylene] (MEH-PPV) conjugate polymers with single-walled carbon nanotubes (SWNTs). The blend ratio of MEH-PPV/SWNT composites for polymer light-emitting diodes (PLEDs) ranged from 0 wt% to 1 wt% SWNTs. From time-of-flight (TOF) measurements, the electron mobility was observed to increase gradually with the weight percent of SWNTs while the hole mobility remained almost unchanged. According to the Poole-Frenkel model, an increase in the weight percent of SWNTs lowers the zero-field activation energy, suggesting that SWNTs effectively reduce the oxygen trap density. At a 0.2-wt% SWNTs concentration, the electron and the hole mobilities could be tuned for the highest external quantum efficiency.

Original languageEnglish
Pages (from-to)146-149
Number of pages4
JournalJournal of the Korean Physical Society
Volume48
Issue number1
Publication statusPublished - 2006 Jan

Keywords

  • MEH-PPV polymer
  • Polymer light-emitting diode
  • Single-walled carbon nanotube
  • Time-of-flight measurement

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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