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High-mobility solution-processed copper phthalocyanine-based organic field-effect transistors.

Nandu B Chaure1, Andrew N Cammidge2, Isabelle Chambrier2

  • 1Department of Physics, University of Pune, Ganeshkhind, Pune 411007, India.

Science and Technology of Advanced Materials
|November 24, 2016
PubMed
Summary
This summary is machine-generated.

Surface treatment of organic field-effect transistors (OFETs) with octadecyltrichlorosilane (OTS) significantly improved performance. This enhanced mobility and stability in copper phthalocyanine (CuPc6) based devices.

Keywords:
AFMfield effect mobilityorganic thin film transistorsubstituted copper phthalocyaninesurface treatmenttopology

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Area of Science:

  • Materials Science
  • Organic Electronics
  • Semiconductor Physics

Background:

  • Organic field-effect transistors (OFETs) are crucial for flexible electronics.
  • Copper phthalocyanine (CuPc6) is a promising organic semiconductor.
  • Interface engineering is key to optimizing OFET performance.

Purpose of the Study:

  • To investigate the effect of surface treatment on CuPc6-based OFETs.
  • To enhance the performance and stability of organic transistors.
  • To understand the role of dielectric surface modification.

Main Methods:

  • Fabrication of bottom-gate OFETs using solution-processed CuPc6 films.
  • Application of octadecyltrichlorosilane (OTS) self-assembled monolayers on SiO2 gate dielectrics.
  • Characterization of device performance including mobility, on/off ratio, and threshold voltage.

Main Results:

  • OTS treatment significantly improved saturation mobility to 4x10^-2 cm^2 V^-1 s^-1.
  • The on/off current ratio increased to 10^6.
  • Threshold voltage shifted from 3 V to -2 V, and trap density decreased by an order of magnitude.
  • OTS-treated devices exhibited enhanced stability over 30 days in air.

Conclusions:

  • Surface treatment with OTS is an effective strategy for enhancing CuPc6 OFET performance.
  • Optimized dielectric interfaces lead to improved charge transport and device stability.
  • This work contributes to the development of high-performance organic electronic devices.