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    Expert's Opinion

    Pusan University Researchers Develop ‘Super-Flexible’ Electroluminescent Devices for Wearables

    With wearable electronics being all the rage, South Korean researchers have developed a super stretchable and durable material, unlike its predecessors.

    Pusan University Researchers Develop ‘Super-Flexible’ Electroluminescent Devices for Wearables
    Source: Pusan National University
    Pusan University09.07.21
    ‘Super-flexible’ material appears to be an absolute necessity for wearable electronics of the future. Of all the scientists working on developing this material, researchers from Pusan University have achieved success in developing one like never before, which is not only super stretchable, but also deformable, according to a study published in Advanced Materials.

    The future will be colored by ‘bend-at-will’ light sources. A successful research study by a group of South Korean material scientists has proven that this future is not far away. As shown in a recent study published in Advanced Materials, this group from Pusan University has developed a super stretchable, deformable, and durable material through the application of mechanically reinforced ionogel conductors. The research paper, which was made available online on 13th May 2021, and was published in Volume 33, and Issue 25 of the journal on 24th June 2021, elaborates how this material can be applied in a ‘super-flexible’ alternating current electroluminescent device.

    Speaking about the development of the novel material, Professor Jinhwan Yoon (ORCID id: 0000-0003-1638-2704), who is also one of the corresponding authors of the study, remarks, “We developed stretchable and durable conductive ionogels with a double-network (DN) structure, which is achieved by combining stretchable soft polymer network with stress-resistive hard polymer network.” Professor Yoon and his team highlights that the developed material shows high mechanical robustness and good electrical conductivity against extreme elongation for the developed ionogels.

    Furthermore, the researchers went a step further, and successfully demonstrated the operation of ‘super-flexible’ electroluminescent devices fabricated with developed ionogel. Notably, the device functioned even with an extremely large mechanical elongation of up to 1200%, and various deformation such as bending, rolling, and twisting. In addition, the developed devices also display stable luminescence over 1000 stretch/release cycles or at temperatures as harsh as 200°C, unlike any of its predecessors.

    With such a breakthrough advancement in ‘super-flexible’ electroluminescent material, Professor Yoon is hopeful about potential applications, stating “We believe that the future of current electronics would be deformable and stretchable beyond simply flexible and bendable for wearable application. With the soft electrode platform we developed, it is expected that more development on wearable electronics can be boosted, thereby people can wear lots of unprecedented devices enabling them to monitor their motion and health condition, display the information etc.” Indeed, the study has yielded a futuristic ‘super-material’!

    Reference
    Authors:
    Hiep Dinh Xuan1, Bernard Timothy1, Ho-Yeol Park1, Tuyet Nhi Lam1, Dowan Kim1, Yeonjeong Go1, Jongyoun Kim2, Youngu Lee2, Sung Il Ahn1, Sung-Ho Jin1,*, and Jinhwan Yoon1,*
    Title of original paper: Super Stretchable and Durable Electroluminescent Devices Based on Double-Network Ionogels

    Journal: 
    Advanced Materials

    DOI: 
    10.1002/adma.202008849

    Affiliations: 
    1Graduate Department of Chemical Materials, Institute for Plastic Information and Energy Materials, Sustainable Utilization of Photovoltaic Energy Research Center, Pusan National University, Republic of Korea
    2 Department of Energy Science & Engineering, DGIST, Republic of Korea

    *Corresponding author(s) email ID(s): jinhwan@pusan.ac.kr
    Laboratory website: https://www.yoongroup.net
    ORCID ID: 0000-0003-1638-2704

    About the author: Professor Jinhwan Yoon is an associate professor at Pusan National University. He obtained his Ph.D. degree from Pohang University of Science and Technology (POSTECH), Korea, in 2007. He worked as a postdoctoral researcher at POSTECH and the University of Massachusetts, Amherst. His research group is studying the design of the mechanically reinforced novel crosslinked networks as well as the development of hybrid hydrogels for highly stretchable soft matter devices.
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