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Related Experiment Video

Updated: Oct 11, 2025

Fabrication of Thin Film Silver/Silver Chloride Electrodes with Finely Controlled Single Layer Silver Chloride
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Photo-Sintered Silver Thin Films by a High-Power UV-LED Module for Flexible Electronic Applications.

Minha Kim1, Hongsub Jee1, Jaehyeong Lee1

  • 1Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon 16419, Korea.

Nanomaterials (Basel, Switzerland)
|November 27, 2021
PubMed
Summary

Researchers developed a novel ultraviolet light-emitting diode (UV-LED) photo-sintering system for printed electronics. This method achieves low electrical resistivity in silver nanoparticle films, offering a more efficient alternative to thermal sintering.

Keywords:
flexible substratelow temperature processphoto-sinteringsilver thin filmultraviolet light emitting diode (UV-LED)

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Electrical Engineering

Background:

  • Conventional thermal sintering for printed electronics is energy-intensive and time-consuming.
  • Intense pulsed light (IPL) sintering offers selective heating but xenon lamps have limitations for large-scale applications.

Purpose of the Study:

  • To develop a new photo-sintering system using a high-power ultraviolet light-emitting diode (UV-LED) module.
  • To evaluate the effectiveness of UV-LED photo-sintering for silver nanoparticle inks on polyethylene terephthalate (PET) substrates.

Main Methods:

  • Inkjet printing of silver nanoparticle ink onto PET substrates.
  • Photo-sintering using a high-power UV-LED module with wavelengths of 365 nm and 385 nm.
  • Optimization of sintering conditions, including wavelength and light intensity.

Main Results:

  • Achieved a low electrical resistivity of 5.44 × 10-6 Ω·cm for the silver nanoparticle film.
  • Optimized conditions involved a wavelength of 365 nm and light intensity of 300 mW/cm2.
  • Demonstrated the potential for large-scale applications due to the UV-LED source's merits.

Conclusions:

  • The developed UV-LED photo-sintering system is a viable and efficient alternative to conventional sintering methods.
  • This technique enables the fabrication of highly conductive printed electronic components.
  • UV-LEDs offer advantages in power consumption and scalability for printed electronics manufacturing.