Junction Physics and Architectural Paradigms in Optoelectronic Semiconductor Fibers.

Area of Science:

• Materials Science
• Electrical Engineering
• Physics

Background:

• Optoelectronic fibers are key for wearable electronics, soft robotics, and embodied intelligence, enabling functions like sensing and energy harvesting.
• Unlike planar devices, fiber-based optoelectronics require intrinsic integration of light emission, detection, and modulation within deformable textile networks.
• Device performance in 1D semiconductor fibers is limited by junction formation under confined and dynamic processing, with a lack of unified design frameworks.

Purpose of the Study:

• To establish a systematic, junction-centric framework for understanding and designing optoelectronic fiber systems.
• To connect semiconductor physics, fiber-processing constraints, and device performance for coherent analysis.
• To enable the development of high-fidelity in-fiber junctions for advanced applications.

Main Methods:

• Developed a framework linking semiconductor physics, fiber processing, and device performance.
• Analyzed how fiber-confined processing influences microstructural evolution and junction formation.
• Investigated the impact of thermal, fluidic, and mechanical histories on fiber morphology and crystallization.

Main Results:

• Established a unified framework for analyzing and designing fiber solar cells, photodetectors, and LEDs.
• Demonstrated that fabrication history dictates fiber morphology, junction quality, and device performance.
• Identified actionable strategies for achieving high-fidelity in-fiber junctions.

Conclusions:

• The junction-centric framework provides a systematic approach to designing optoelectronic fibers.
• Fiber processing history is critical for controlling junction quality and device performance.
• Axially continuous and segmented junction architectures offer pathways for miniaturization and multifunctional integration.