Self-Powered Motion-Driven Triboelectric Electroluminescence Textile System

Abstract

In recent years, smart light-emitting-type electronic devices for wearable applications have been required to have flexibility and miniaturization, which limits the use of conventional bulk batteries. Therefore, it is important to develop a self-powered light-emitting system. Our study demonstrates the potential of a new self-powered luminescent textile system that emits light driven by random motions. The device is a ZnS:Cu-based textile motion-driven electroluminescent device (TDEL) fabricated onto the woven fibers of a ZnS:Cuembedded PDMS (polydimethylsiloxane) composite. Triboelectrification, which raises a discontinuous electric field, is generated by the contact separation movement of the friction material. Therefore, light can be generated via triboelectrification by the mechanical deformation of the ZnS:Cu-embedded PDMS composite. This study showed that the TDEL emitted light from the internal triboelectric field during contact and from the external triboelectric field during separation. Light was then emitted twice in a cycle, suggesting that continuous light can be emitted by various movements, which is a key step in developing self-powered systems for wearable applications. Therefore, this technology is a textile motiondriven electroluminescence system based on composite fibers (ZnS:Cu + PDMS) and PTFE fibers, and the proposed selfemitting textile system can be easily fabricated and applied to smart clothes.

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

“…More recently, Park et al demonstrated a self‐powered textile system through motion‐driven triboelectric electroluminescence (Figure c) . This is also attributed to the mechanism of the ML phenomenon, which leads to triboelectricity between PTFE fibers and composite fibers (PDMS + ZnS:Cu).…”

“…Copyright 2017, Wiley‐VCH. c,d) Reproduced with permission . Copyright 2019, American Chemical Society.…”

Self-powered user-interactive electronic skin for programmable touch operation platform

“…Figure 1D shows the stability and repeatability test of the SUE-skin's luminescence feature by 1000 cycles. (32)(33)(34)(35), and the ZnS: Cu, Al synthesized here has higher luminous efficiency than ZnS: Cu because it is doped with Al as a co-activator. As shown in fig.…”

Progress on wearable triboelectric nanogenerators in shapes of fiber, yarn, and textile

“…Tremendous efforts have been made to fabricate various TENGs based on fabrics or textiles, including improving the triboelectric performance, operability, and washability of devices. In general, there are two routes to achieve the textile TENGs, the first one is fabricating the TENGs based on yarns, threads, and belts, followed by weaving those units into textile devices to improve the applicability [67][68][69][70][71][72][73][74][75][76][77][78][79][80][81][82][83][84][85]. The second way is realizing TENGs by in situ functionalization directly on the off-the-shelf textiles that were woven by synthetic or natural fibers/yarns [86][87][88][89][90][91][92][93][94][95][96][97][98][99][100].…”

“…More interesting, a novel integration of self-powered motion-driven triboelectric electroluminescence (EL) textile has been demonstrated by Kim et al recently (Figure 5(k)). The textile was realized by weaving the belts of ZnS:Cu/PDMS composite and PTFE fibers [85]. Mechanical stimuli could induce deformation of the textile to generate tribo- electrification, the instantaneous triboelectric filed could be produced from the contact-separation between PDMS and ZnS:Cu microspheres, as well as the contact objects and textile surface.…”