Coaxial‐Structured Weavable and Wearable Electroluminescent Fibers

Abstract

Flexible, lightweight, and wearable devices are currently attracting tremendous interest in the field of advanced electronics. In this work, novel 1D, flexible, coaxial-structured, bright and colorful alternating current electroluminescent (ACEL) fibers consisting of AgNW-based electrodes, a ZnS phosphor layer, and silicone dielectric and encapsulation layers are designed and fabricated through a simple protocol. This facile all-solution-based fabrication protocol enables scalable production of long ACEL fibers (>12 cm). Stemming from the rational design and facile fabrication process, the as-prepared ACEL fibers exhibit uniform, bright, and angularly independent luminance (up to 202 cd m −2 @ 195 V and 2 kHz). Benefiting mainly from the robust AgNWbased electrodes and versatile silicone, the ACEL fibers exhibit additionally excellent flexibility and mechanical stability, being capable to maintain ≈91% of luminance after 500 bending-recovery cycles, as well as mitigated luminance degradation after continuous work in ambient. The proper length combined with superb mechanical properties makes the ACEL fibers readily weavable. Most notably, the isolating, hydrophobic, and biocompatible silicone encapsulation layer endows the ACEL fibers unprecedented wearability. Eventually, a proof-of-concept ACEL fabric is demonstrated by weaving the asprepared long ACEL fibers, to show the future perspective of directly weaving ACEL fibers into densely arrayed wearable functional cloths. Flexible Electronics

Recent Progress of Fiber Shaped Lighting Devices for Smart Display Applications—A Fibertronic Perspective

“…Copyright 2017, Royal Society of Chemistry. d) Reproduced with permission . Copyright 2017, Wiley‐VCH.…”

“…Weavable and wearable colorful fiber‐based flexible ACEL devices (Figure d) have been developed by Liang et al in 2017 . The fiber‐based ACEL device consisted of dip‐coated ZnS as the active phosphor, and used high aspect ratio AgNWs for both the inner and outer electrodes.…”

3D Patternable Supercapacitors from Hierarchically Architected Porous Fiber Composites for Wearable and Waterproof Energy Storage

“…Apart from the processing accuracy, for a real wearable device, waterproof property is also very essential for accommodating the practical environment, like sweat and rain. Herein, the SCs were all encapsulated with transparent silicone sealant that is highly repellent and flexible, and widely used in sealing circuit boards . Figure d demonstrates both the CV and GCD curves of the encapsulated logo‐patterned SCs immersed in water.…”

The Rise of Fiber Electronics

“…[102] At ypical ZnS-based lighting fiber with an outer electroluminescent layer and two inner parallel hydrogel electrodes was prepared via an extrusion process. [102] At ypical ZnS-based lighting fiber with an outer electroluminescent layer and two inner parallel hydrogel electrodes was prepared via an extrusion process.…”