Thermally and Chemically-Stable Core-Shell Silver Nanowires with SnOx Coating

Tech ID: 31899 / UC Case 2018-419-2

Background

Conventional ITO electrodes are subject to long-term performance degradation in response to oxidation in ambient conditions. The application of ITO electrodes is further tampered by their rigidity and inability to bend to fit the convoluted structures of various electronic devices. Although ITO electrodes are commonly used for displays and touch screens, fabrication costs are still high due their complex production requirements. 

Description

Researchers at the University of California, Santa Barbara have synthesized high performance, flexible and stable silver nanowires that do not degrade under ambient conditions. Using wet chemical synthesis and molecular modification, Ag nanowires are evenly coated with a layer of SnOx. The formation of tin oxide on the surface of silver nanowires provides thermal and chemical stability for long-term applications, preventing oxidation and sulfidation without affecting their conductivity. In addition, these synthesized core-shell Ag@SnOx nanowires are mechanically flexible and enable transparent electrodes with high transmittance and low haze. This technology achieves comparable performance with conventional ITO electrodes with considerably lower costs and a simpler fabrication process that is suitable for large-scale production. 

Advantages

  • Increases nanowire performance
  • Increases electrode longevity
  • Reduces fabrication costs

Applications

  • Touchscreens
  • Flexible displays and devices
  • Solar Cells
  • Haptics

Patent Status

Country Type Number Dated Case
Patent Cooperation Treaty Published Application WO2020038641 02/27/2020 2018-419
 

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Keywords

nanowire, silver nanowire, ITO, electrode

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