Improved performance of polymer light-emitting devices based on blend of MEH-PPV and vinyl copolymer with 1,3,4-oxadiazole chromophores

Kun Ming Yeh, Yun Chen

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

We have developed a simple method to overcome the intrinsic defect of well-known poly[2-methoxy-5-(2′-ethylhexoxy)-p-phenylenevinylene] (MEH-PPV), i.e. rampant inter-chain interaction and imbalanced hole and electron fluxes, by blending with copolymer of polystyrene containing pendant aromatic 1,3,4-oxadiazole (PSOXD12). The addition of PSOXD12 reduces the inter-chain interaction and balances charge carrier transport simultaneously. Photoluminescence (PL), PL excitation and electroluminescence (EL) spectra of the blends reveal that the inter-chain interactions, such as aggregation and excimer/exciplex, are reduced markedly due to the presence of PSOXD12. Enhanced EL device performance has been achieved (16,261 cd/m2, 4.79 cd/A) as a result of both reduced inter-chain interaction and balanced charge transport.

Original languageEnglish
Pages (from-to)45-50
Number of pages6
JournalOrganic Electronics
Volume9
Issue number1
DOIs
Publication statusPublished - 2008 Feb

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry
  • Electrical and Electronic Engineering

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