A Fully Flexible Intelligent Thermal Touch Panel Based on Intrinsically Plastic Ag₂ S Semiconductor

Area of Science:

• Materials Science
• Flexible Electronics
• Semiconductor Technology

Background:

• Wearable touch panels require accurate monitoring of finger movement and deformation tolerance.
• Existing challenges include brittle inorganic semiconductors and low-performance organic semiconductors.

Purpose of the Study:

• To develop a high-performance flexible temperature sensor overcoming current material limitations.
• To integrate this sensor into an intelligent touch panel for real-time signal perception and feedback.

Main Methods:

• Utilized plastic silver sulfide (Ag₂S) to create a flexible temperature sensor.
• Fabricated a 16 × 10 Ag₂S-film-based temperature sensor array.
• Integrated the array with a flexible printed circuit board and a deep-learning algorithm.

Main Results:

• Achieved an ultrahigh temperature coefficient of resistance (-4.7% K⁻¹) and high resolution (0.05 K).
• Demonstrated rapid response/recovery times (0.11/0.11 s) and excellent durability under force stimuli.
• Successfully designed a flexible intelligent touch panel capable of real-time finger touch perception and app feedback.

Conclusions:

• Plastic Ag₂S offers a high-performance solution for flexible temperature sensors.
• The developed sensor technology is suitable for advanced wearable electronic devices.
• High-performance flexible inorganic semiconductors show broad applicability in flexible electronics.