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Readily Processable Hole-Transporting Peropyrene Gels.

Marta Martínez-Abadía1, Gabriella Antonicelli1, Akinori Saeki2

  • 1POLYMAT, University of the Basque Country UPV/EHU, Avenida de Tolosa 72, 20018, Donostia-San Sebastian, Spain.

Angewandte Chemie (International Ed. in English)
|May 5, 2018
PubMed
Summary

Researchers developed peropyrene gels for scalable organic electronics. These gels enable low-cost, large-area fabrication of organic field-effect transistors (OFETs) with significantly improved performance.

Keywords:
field-effect transistorsperopyrenepolycyclic aromatic hydrocarbonsπ-gels

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Area of Science:

  • Organic electronics
  • Materials science
  • Nanotechnology

Background:

  • Scalable solution-processing is crucial for cost-effective, large-area organic electronic device fabrication.
  • Developing novel materials that facilitate efficient device manufacturing is an ongoing challenge.

Purpose of the Study:

  • To report the preparation of peropyrene gels.
  • To investigate their application in fabricating organic field-effect transistors (OFETs).
  • To evaluate the performance of OFETs fabricated using these gels.

Main Methods:

  • Preparation of peropyrene gels forming 3D networks of 1D ribbon-like fibrils.
  • Fabrication of bottom-gate, bottom-contact OFETs by depositing peropyrene gels in a sol state.
  • Subsequent gelation of the deposited material.
  • Electrical characterization of the fabricated OFETs.

Main Results:

  • Successfully prepared peropyrene gels composed of 3D networks of entangled 1D fibrils.
  • OFETs were fabricated by simple deposition and subsequent gelation of the peropyrene sol.
  • Achieved a balance between processability and performance.
  • Demonstrated hole mobilities two orders of magnitude higher than thin films from non-gelating solvents.

Conclusions:

  • Peropyrene gels offer a promising route for scalable and cost-effective fabrication of organic electronic devices.
  • The unique fibrillar network structure contributes to enhanced charge transport properties.
  • This approach significantly improves the performance of organic field-effect transistors compared to traditional thin-film methods.