Fluorescent Dye-Enhanced ACEL Fibers for Omnidirectional Luminescence and Voice-Interactive Human–Machine Interfaces

Abstract

Abstract

With the progress of flexible wearables, electronic devices have evolved from three-dimensional bulk materials and two-dimensional films to flexible one-dimensional fiber structures. Amongst all, alternating current electroluminescent (ACEL) fibers have received increasing attention due to their flexibility, weavability, and human-body compatibility. Nevertheless, ACEL still faces great challenges in achieving efficient color modulation, continuous preparation and device integration. Herein, a novel color-tunable ACEL fiber based on fluorescent dye-mediated omnidirectional color conversion is presented, where continuous deposition of functional materials is achieved by conjugated electrospinning and solution dip-coating techniques. Such fiber achieves uniform omnidirectional light emission while maintaining exceptional flexibility, mechanical durability, and water resistance, with additional color conversion capability. Together, these synergistic properties make them ideally suited for integration into smart textiles through weaving or hand embroidery processes. In addition, these ACEL fibers have been successfully integrated with sound sensors featuring speech recognition and volume detection, an advancement that paves the way for visual and barrier-free communication solutions for the hearing-impaired individuals, as well as early warning systems in high-noise environments. Overall, this work provides a new technological paradigm for textile-based wearable full-color displays with significant scientific and practical value in smart wearables, interactive e-textiles, and intelligent human–machine interfaces.

Graphical Abstract

Keywords

Conjugate electrospinning / Alternating current electroluminescent fibers / Omnidirectional luminescence / Color conversion / Sound sensors

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Funding

Zhejiang Provincial Natural Science Foundation of China(LY21E030023)

Zhejiang Sci-Tech University Shengzhou Innovation Research Institute(SYY2024C000008)

RIGHTS & PERMISSIONS

Donghua University, Shanghai, China