High-quality semiconductor fibres via mechanical design

Area of Science:

• Materials Science
• Mechanical Engineering
• Optoelectronics

Background:

• Recent advances in fiber technology allow integrating diverse functionalities into single fibers.
• Semiconductors are crucial for device performance, but their integration into fibers faces challenges like cracks and deformations during thermal drawing.
• Capillary instability and stress development during fiber formation negatively impact semiconductor core integrity.

Purpose of the Study:

• To develop a mechanical design for producing ultralong, fracture-free, and perturbation-free semiconductor fibers.
• To investigate stress development and capillary instability during fiber formation stages.
• To enable the creation of high-performance flexible and wearable optoelectronic devices.

Main Methods:

• Studied stress development and capillary instability during viscous flow, core crystallization, and cooling stages of fiber formation.
• Employed a mechanical design approach to mitigate cracks and deformations in semiconductor cores.
• Integrated exposed semiconductor wires with metal electrodes to create functional optoelectronic fibers.

Main Results:

• Achieved ultralong, fracture-free, and perturbation-free semiconductor fibers.
• Demonstrated successful integration of semiconductor wires into flexible fibers with defined interfaces.
• Enabled the fabrication of optoelectronic fibers and large-scale optoelectronic fabrics.

Conclusions:

• The mechanical design provides fundamental insights into extreme mechanics and fluid dynamics for fiber fabrication.
• This work addresses the demand for flexible and wearable optoelectronics by overcoming semiconductor integration challenges.
• The developed method paves the way for advanced functional fibers with enhanced performance and reliability.