Ultra-high drivability, high-mobility, low-voltage and high-integration intrinsically stretchable transistors

Area of Science:

• Materials Science
• Electronics Engineering
• Nanotechnology

Background:

• Advancing stretchable electronics requires intrinsically stretchable transistors with high performance and mass production potential.
• Existing fabrication methods face limitations in integrating stretchable materials for high-performance transistors.

Purpose of the Study:

• To develop integratable intrinsically stretchable carbon nanotube thin-film transistors (IIS-CNT-TFTs) with enhanced electrical and mechanical properties.
• To overcome fabrication challenges for high-performance stretchable transistors.

Main Methods:

• A novel removal-transfer-photolithography method (RTPM) was employed.
• Poly(urea-urethane) (PUU) was used as the dielectric material.
• Removable sacrificial layers were utilized to protect the substrate and dielectric during processing.

Main Results:

• The IIS-CNT-TFTs achieved a field-effect mobility of 221 cm² V⁻¹ s⁻¹ and a current density of 810 μA mm⁻¹ at -1 V.
• The transistors demonstrated high stretching durability, surviving 2000 cycles of 50% stretching.
• The developed transistors exhibit superior electrical performance, durability, and feature size compared to existing technologies.

Conclusions:

• The proposed RTPM offers a novel solution for creating high-performance, integratable intrinsically stretchable electronics.
• The method is broadly applicable for improving existing transistors and devices in soft electronics.
• These advancements pave the way for next-generation stretchable circuits, displays, and wearable devices.