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Work Function Engineering of Electrohydrodynamic-Jet-Printed PEDOT:PSS Electrodes for High-Performance Printed

Benzheng Lyu, Soeun Im1, Hongyue Jing

  • 1Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul 03722, Republic of Korea.

ACS Applied Materials & Interfaces
|March 19, 2020
PubMed
Summary

Work function engineering of electrohydrodynamic-jet-printed Poly(3,4-ethylenedioxythiophene):poly(4-styrene sulfonate) (PEDOT:PSS) enabled high-performance organic field-effect transistors (OFETs) and logic circuits. This research demonstrates deterministic control over PEDOT:PSS work function for advanced electronic devices.

Keywords:
EHD printingPEDOT:PSSlogic circuittransistorwork function

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Area of Science:

  • Organic Electronics
  • Materials Science
  • Semiconductor Physics

Background:

  • Poly(3,4-ethylenedioxythiophene):poly(4-styrene sulfonate) (PEDOT:PSS) is a key material for charge transport and electrodes in organic electronics.
  • Device performance is significantly influenced by the PEDOT:PSS-semiconductor junction's contact properties.

Purpose of the Study:

  • To engineer the work function (WF) of electrohydrodynamic (EHD)-jet-printed PEDOT:PSS.
  • To utilize WF-engineered PEDOT:PSS as electrodes for fabricating high-performance organic field-effect transistors (OFETs) and complementary logic circuits.

Main Methods:

  • Synthesis of two PEDOT:PSS materials with distinct work functions (high WF: 5.28 eV, low WF: 4.53 eV).
  • Electrohydrodynamic (EHD) jet printing of PEDOT:PSS materials.
  • Deterministic modulation of PEDOT:PSS work function via controlled mixing of synthesized materials.

Main Results:

  • Achieved a deterministic work function modulation of approximately 0.75 eV.
  • Fabricated OFETs with high ON/OFF switching ratios (>10^7) and carrier mobility (>1 cm^2·V^-1·s^-1).
  • Successfully integrated high and low work function PEDOT:PSS electrodes to create complementary metal-oxide-semiconductor (CMOS) logic circuits (NOT, NOR, NAND).

Conclusions:

  • Work function engineering of EHD-jet-printed PEDOT:PSS is a viable strategy for fabricating high-performance organic electronic devices.
  • The developed method allows precise control over electrode properties, enhancing OFET and logic circuit performance.
  • This approach offers a pathway for advanced organic electronic applications.