Intrinsically stretchable 2D MoS₂ transistors

Area of Science:

• Materials Science
• Nanotechnology
• Electronics Engineering

Background:

• Intrinsically stretchable electronics offer novel form factors and capabilities for next-generation devices.
• Development of high-performance stretchable n-type materials is crucial for complementary metal-oxide-semiconductor integration.

Purpose of the Study:

• To report high-performance intrinsically stretchable thin-film transistors using two-dimensional semiconducting flakes.
• To investigate the strain accommodation mechanism and charge transport stability in these stretchable transistors.

Main Methods:

• Fabrication of n-type molybdenum disulfide (MoS2) thin-film transistors.
• Characterization of device performance under mechanical strain (up to 20%).
• Structural analysis to understand strain relaxation mechanisms via interflake motions.

Main Results:

• Achieved maximum field-effect mobility of 12.5 cm2V-1s-1 (average 8 cm2V-1s-1) and on/off current ratio > 10^7 under 20% strain.
• Demonstrated stable performance during cyclic stretching tests.
• Identified interflake motions and van der Waals bonds as key to stress relaxation and maintained charge transport.

Conclusions:

• The developed MoS2 transistors exhibit excellent stretchability and stable performance.
• The strain accommodation mechanism provides a generalizable pathway for integrating 2D semiconductors into stretchable electronics.
• Addresses the need for high-performance stretchable n-type materials, enabling scalable and logically capable deformable systems.