Highly Transmittance, Mechanical, Thermally Stable Silver Nanowires Network Using ZnO Nanoparticles

Area of Science:

• Materials Science
• Nanotechnology
• Solid State Physics

Background:

• Silver nanowires (Ag NWs) are widely used as transparent conductive electrodes (TCEs) but face challenges in thermal stability and mechanical durability.
• Existing protective layers for Ag NWs often compromise their optical or electrical properties.

Purpose of the Study:

• To investigate the use of zinc oxide nanoparticles (ZnO NPs) as a protective layer for Ag NWs to enhance their thermal stability and overall performance.
• To evaluate the electrical, thermal, and mechanical properties of Ag NWs coated with ZnO NPs.

Main Methods:

• Fabrication of Ag NWs coated with ZnO NPs.
• Multi-physics simulations to analyze heat dissipation, temperature distribution, and thermal conductivity.
• Experimental testing of electrical sheet resistance, optical transmittance, and thermal stability under mechanical stress (bending cycles).

Main Results:

• ZnO NP coating significantly improved the thermal stability of Ag NWs, maintaining a consistent temperature for 700s after 500 bending cycles, compared to Ag NWs alone (5s).
• The Ag NWs/ZnO NPs composite exhibited superior electrical conductivity (9.8 Ω sq⁻¹ sheet resistance) and optical transmittance (96.96 %) compared to bare Ag NWs (12 Ω sq⁻¹ and 94.11 %).
• Multi-physics simulations confirmed enhanced heat dissipation and thermal conductivity due to the ZnO layer.

Conclusions:

• ZnO NPs serve as an effective protective layer for Ag NWs, significantly enhancing their thermal stability and mechanical durability.
• The Ag NWs/ZnO NPs composite demonstrates improved electrical and optical properties, making it a promising material for transparent conductive electrodes.
• This development offers a viable solution for challenges faced by Ag NWs in commercial applications requiring robust TCEs and heaters.