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Transferable Organic Semiconductor Nanosheets for Application in Electronic Devices.

Simon J Noever1,2, Michael Eder1, Fabio Del Giudice1

  • 1Faculty of Physics and CeNS, Ludwig-Maximilians-Universität München, 80539, Munich, Germany.

Advanced Materials (Deerfield Beach, Fla.)
|May 9, 2017
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Summary

A new method uses low-energy electron irradiation to crosslink and stabilize organic semiconductor nanofilms, enabling their transfer to new substrates. These transferred films maintain structural integrity and show enhanced electronic performance in devices.

Keywords:
2D materialselectronic devicesnanosheetsorganic semiconductorspentacene

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Area of Science:

  • Materials Science
  • Organic Electronics
  • Nanotechnology

Background:

  • Organic semiconductors are crucial for flexible electronics.
  • Transferring delicate nanofilms without damage is a significant challenge.
  • Current methods often limit substrate compatibility and device integration.

Purpose of the Study:

  • To develop a method for stabilizing and transferring organic semiconductor nanofilms.
  • To investigate the structural and electronic properties of transferred films.
  • To enable the integration of organic semiconductors onto diverse substrates.

Main Methods:

  • Low-energy electron irradiation for crosslinking the topmost layers of pentacene nanofilms.
  • Detachment and transfer of crosslinked nanofilms to new substrates.
  • Characterization using grazing incidence X-ray diffraction, X-ray specular reflectivity, and UV-Vis spectroscopy.
  • Fabrication and testing of bottom contact field-effect devices.

Main Results:

  • Electron irradiation crosslinks only the top ~5 nm of ~50 nm pentacene films, preserving deeper crystallinity.
  • Transferred pentacene nanosheets retain structural integrity.
  • Transferred films exhibit fully functional electronic performance with superior charge injection properties compared to conventionally deposited films.

Conclusions:

  • The developed electron irradiation method effectively stabilizes and transfers organic semiconductor nanofilms.
  • This technique allows integration onto substrates unsuitable for direct growth.
  • It opens possibilities for novel hybrid devices and free-standing organic semiconductor structures.