Photoreactive hole-transporting polymer bearing oxetane moieties and its application to green polymer light-emitting diodes

Min Ju Cho, Myung Hee Kim, Kyu Nam Kim, Jung Il Jin, Young Min Kim, Young Wook Park, Byeong Kwon Ju, Dong Hoon Choi

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

A new hole-transporting polymer was prepared by the copolymerization of 9-(4-vinyl-benzyl)-9H-carbazole and 3-methyl-3-(4-vinyl-benzyloxymethyl)-oxetane in the presence of α,α′-azobisisobutyronitrile (AIBN). The latter contains an oxetane unit that is cationically photopolymerizable. It was characterized by NMR, GPC, IR spectroscopy, TGA, and differential scanning calorimetry (DSC). Multilayer polymer light-emitting diodes (PLEDs) were fabricated layer by layer by using the spin-coating method with an organic solution of a photoreactive copolymer. Organic soluble poly[2-(carbazol-9-yl)-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] (CzEh-PPV) that carries hole-transporting carbazole pendants was also synthesized and employed as a green-emitting material in PLEDs. After UV illumination for photoreaction in the new photoreactive oxetane-based copolymer (VCz-Ox), we could spin coat the CzEh-PPV solution for the next layer. The hole-transport capability of the copolymer was evaluated in multilayer PLEDs that were fabricated to test the device performances.

Original languageEnglish
Pages (from-to)785-789
Number of pages5
JournalSynthetic Metals
Volume158
Issue number21-24
DOIs
Publication statusPublished - 2008 Dec 1

Keywords

  • Carbazole
  • Cationic photopolymerization
  • Hole-transport materials
  • Photoreactive

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Chemistry
  • Metals and Alloys
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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