Flexible Transparent Heater Fabricated from Spray-Coated In:ZnO/Ag-NWs/In:ZnO Multilayers on Polyimide Foil

Area of Science:

• Materials Science
• Nanotechnology
• Thin Film Technology

Background:

• Flexible transparent heaters are crucial for emerging electronic applications.
• Existing fabrication methods often involve high temperatures or complex processes, limiting scalability and cost-effectiveness.

Purpose of the Study:

• To develop a low-temperature, scalable fabrication method for flexible transparent heaters.
• To investigate the performance and stability of a novel all-sprayed composite architecture.

Main Methods:

• Utilized a low-temperature (240 °C) spray-pyrolysis process to create indium-doped zinc oxide (IZO) layers on a polyimide substrate.
• Sandwiched a silver nanowire network between IZO layers to form a composite architecture.
• Characterized the optical transmittance, sheet resistance, thermal performance, and mechanical stability of the fabricated heaters.

Main Results:

• Achieved high mean transmittance (0.76) and low sheet resistance (7.5 Ω/sq).
• Demonstrated a steady-state temperature of ~130 °C at 3.5 V with a fast response time (~4 s).
• Exhibited excellent mechanical stability under tensile and compressive bending stress.

Conclusions:

• The all-sprayed oxide/silver-nanowire composite coating is a viable method for high-performance transparent heaters.
• The developed fabrication process is compatible with large-scale and low-cost production.
• The resulting flexible transparent heaters show promise for widespread application in flexible electronics.