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A Simple and Scalable Fabrication Method for Organic Electronic Devices on Textiles
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Controllable and Versatile Electrophoretic Deposition Technology for Monolithic Organic Memory Devices.

Cheng Zhang1, Hua Li1, Yanna Su1

  • 1College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, P. R. China.

ACS Applied Materials & Interfaces
|March 10, 2020
PubMed
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Electrophoretic deposition (EPD) offers a scalable method for creating high-performance organic nanofilms. This technique enables the fabrication of reliable organic memory devices with potential applications in data security and material recycling.

Area of Science:

  • Materials Science
  • Organic Electronics
  • Nanotechnology

Background:

  • Scaling organic nanofilm deposition for industrial applications remains a significant hurdle in organic electronics.
  • Traditional methods like spin-coating face limitations in scalability and film quality.

Purpose of the Study:

  • To introduce and validate a high-efficiency electrophoretic deposition (EPD) technology for scalable organic nanofilm fabrication.
  • To demonstrate the superior properties and device performance of EPD-fabricated films compared to traditional methods.

Main Methods:

  • Development of solution-processable organic salts with pyridinium groups and flexible substituents for EPD.
  • Fabrication of large-area (10^4 mm^2) organic nanofilms with controlled thickness (50 nm to 1.55 μm) using EPD in organic solvents.
Keywords:
OMDselectrophoretic depositionenvironmentally friendlyflexible substituentslarge-scale organic thin filmmemory securitypyridinium group

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  • Integration and evaluation of EPD films in monolithic organic memory devices.

    • Main Results:

    • EPD enabled the fabrication of uniform, high-purity organic films with superior electrochemical and mechanical properties due to compact molecular packing.
    • 95% of 2745 evaluated organic memory device units showed excellent binary data storage with high stability, reproducibility, low reading bias (1.0 V), and high ON/OFF ratio (>10^3).
    • Reverse EPD demonstrated potential for information storage security and simultaneous separation/recycling of electrodes and organic materials.

    Conclusions:

    • EPD is a highly efficient and scalable technology for producing advanced organic nanofilms for electronic applications.
    • EPD-fabricated organic memory devices exhibit outstanding performance and reliability.
    • The reversibility of EPD offers novel opportunities for secure data storage and sustainable material management.