Pusan University Researchers Develop ‘Super-Flexible’ Electroluminescent Devices

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 13^th May 2021, and was published in Volume 33, and Issue 25 of the journal on 24^th 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’!

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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 Jin^1,*, and Jinhwan Yoon^1,

Title of original paper: Super Stretchable and Durable Electroluminescent Devices Based on Double-Network Ionogels

Journal: Advanced Materials

DOI: https://doi.org/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

Laboratory website: https://www.yoongroup.net

Corresponding author’s ORCID ID: 0000-0003-1638-2704

About Pusan National University

Pusan National University, located in Busan, South Korea, was founded in 1946, and is now the no. 1 national university of South Korea in research and educational competency. The multi-campus university also has other smaller campuses in Yangsan, Miryang, and Ami. The university prides itself on the principles of truth, freedom, and service, and has approximately 30,000 students, 1200 professors, and 750 faculty members. The university is composed of 14 colleges (schools) and one independent division, with 103 departments in all.      

Website: https://www.pusan.ac.kr/eng/Main.do

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.