Wearable, freezing-tolerant, and self-powered electroluminescence system for long-term cold-resistant displays. (July 2022)

• Record Type: Journal Article
• Authors: Zhu, Yan; Xia, Yifan; Wu, Min; Guo, Wenyu; Jia, Chunyang; Wang, Xin
• Is Part Of: Nano energy. Volume 98(2022)
• Publication Date: 2022-07
• Subjects: Wearable optoelectronics -- Electroluminescence device -- Conductive organohydrogel -- Self-powered -- Triboelectric nanogenerator -- Cold-resistant displays; Nanoscience -- Periodicals; Nanotechnology -- Periodicals; Nanostructured materials -- Periodicals; Power resources -- Technological innovations -- Periodicals; Nanoscience; Nanostructured materials; Nanotechnology; Power resources -- Technological innovations; Periodicals; 621.042
• DOI: 10.1016/j.nanoen.2022.107309
• Languages: English
• ISSNs: 2211-2855

Abstract

Abstract: Tremendous efforts in wearable optoelectronics have recently harnessed considerable advances in intrinsically stretchable electroluminescence (EL) devices. However, developing wearable optoelectronics that maintain long-term stability in harsh cold environments is still challenging. Here, a wearable, freezing-tolerant, and self-powered EL system is developed based on organohydrogel-based EL (OH-EL) device integrated with liquid electrolyte-based single-electrode triboelectric nanogenerator (LE-TENG), in which the OH-EL device based on self-healing and highly conductive organohydrogel electrodes can be directly lit by the LE-TENG. The stretchable OH-EL device demonstrates a bright and uniform light emission under 140% tension stretching as well as severe mechanical deformations of bending, rolling, and twisting. Moreover, the optical performances of the OH-EL device exhibit excellent repeatability and durability after continuous 2000 cycles. More importantly, bright blue-green light emission of the self-powered EL system stored at 253 K can maintain for six months, demonstrating extremely long-term freezing-tolerant capability. Furthermore, while harvesting the biomechanical energy of hand slapping and knee/elbow bending, the self-powered EL system worn on different parts of human body can achieve real-time visualized displays. Consequently, the simple fabrication and unique operation of the self-powered EL system demonstrate potential application in cold-resistant displays, wearable self-powered photoelectric devices, soft robotics, and other fields. Graphical Abstract: A wearable, freezing-tolerant, and self-powered EL system based on the OH-EL device integrated with LE-TENG can achieve long-term cold-resistant displays at hash cold environments. Bright blue-green light emission can be achieved from the stretchable OH-EL device driven by the LE-TENG while harvesting biomechanical energy of hand slapping and elbow/knee bending. ga1 Highlights: A stretchable freezing-tolerant EL device is developed based on highly conductive self-healing organohydrogel electrodes. OH-EL device demonstrates a bright/uniform light emission under 140% stretching as well as bending, rolling, and twisting. Bright light emission of self-powered EL system stored at 253 K can maintain for six months to demonstrate cold resistance. While harvesting biomechanical energy, the self-powered EL system worn on human body can achieve real-time displays.