Synthesis and characterization of new poly(p-phenylenevinylene) derivative containing 5,5′-diphenyl-2,2′-p-(2,5-bis-hexyloxyphenylene)-bis-1,3,4-oxadiazol e and distyrylbenzene moieties

Tzi Yi Wu, Nan Chang Lee, Yun Chen

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16 Citations (Scopus)

Abstract

A PPV-based conjugated copolymer DIOXA-PPV containing electron-affinitive bis-1,3,4-oxadiazole and hole-transporting distyrylbenzene derivative was synthesized via Horner-Wadsworth-Emmons reaction. The HOMO, LUMO energy levels and band gap of DIOXA-PPV are determined to be -5.06, -2.98 and 2.08eV, respectively. The photoluminescence (PL) maxima show gradually transition from 515 to 544nm as the concentrations of DIOXA-PPV in C2H2Cl4 increase from 10-7 to 10-3M due to the formation of excimer. Single-layer light-emitting diode (LED) with a structure of ITO/DIOXA-PPV/Al emits bright yellow emission, the threshold voltage and maximum luminance are 4.6V and 188cd/m2, respectively. The EL emission maximum locates at 541nm, which is corresponding to the excimer emission.

Original languageEnglish
Pages (from-to)263-269
Number of pages7
JournalSynthetic Metals
Volume139
Issue number2
DOIs
Publication statusPublished - 2003 Sep 5

All Science Journal Classification (ASJC) codes

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

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