Synthesis of carbazole-containing PPV and its application to the electroluminescent devices

Jae Sung Lee, Eung Ju Oh, Jae Young Park, Moo Whan Shin, In Haeng Cho

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Carbazole-containing PPV (CC-PPV) was chemically synthesized and demonstrated to be electroluminescent for application to a light emitting diode (LED). Soluble CC-PPV copolymer was prepared from dialdehyde monomer and diphosphonium salt in a mixed solvent (ethanol/chloroform) by the well-known Wittig reaction. The UV-Vis absorption spectrum of CC-PPV copolymer in chloroform has a maximum absorption wavelength at 408 nm, which is caused by the π-π* transition of the conjugated system. In PL spectrum, maximum wavelength of emission was found at 512 nm. From the thermogravimetric analysis (TGA) it was confirmed that the synthesized CC-PPV has a thermal stability up to 180°C. For the fabrication of a LED, the synthesized CC-PPV was dissolved in toluene to prepare an 1.0 wt% solution and the film cast from this solution was demonstrated to be light-emitting at an applied voltage of 3.7 V.

Original languageEnglish
Pages (from-to)186-189
Number of pages4
JournalMaterials Science and Engineering B: Solid-State Materials for Advanced Technology
Volume85
Issue number2-3
DOIs
Publication statusPublished - 2001 Aug 22

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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