Cross-linked Polymer-Blend Gate Dielectrics through Thermal Click Chemistry

Shengxia Li, Wei Tang, Weimin Zhang, Xiaojun Guo*, Qing Zhang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

New cross-linking reagents were synthesized and mixed with polystyrene (PS) in solution to form a blend. Thin-films were spin-coated from the blend and then cross-linked by thermal activation at relatively low temperature (100 C) to form cross-linked gate dielectrics. This new method is compatible with plastic substrates in flexible electronics. The azide and alkyne cross-linking reagents are kinetically stable at room temperature, so any premature cross-linking is avoided during processing. This method also significantly improved the dielectric performances of PS thin films. Solution-processed top-gate organic field-effect transistor devices with indacenodithiophene-benzothiadiazole copolymer as semiconductor layer and the cross-linked PS blend as dielectric layer showed improved performances with lower gate leakages and higher operation stabilities than devices with neat PS film as dielectric layer.

Original languageEnglish (US)
Pages (from-to)17762-17768
Number of pages7
JournalChemistry - A European Journal
Volume21
Issue number49
DOIs
StatePublished - Dec 1 2015

Keywords

  • click chemistry
  • cross-linking agents
  • device fabrication
  • dielectrics
  • polymer blends

ASJC Scopus subject areas

  • Catalysis
  • Organic Chemistry

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