Affiliation:
1. Graduate Department of Chemical Materials Institute for Plastic Information and Energy Materials Sustainable Utilization of Photovoltaic Energy Research Center Pusan National University Busan 46241 Republic of Korea
2. Department of Electrical and Computer Engineering Inter‐university Semiconductor Research Center and Soft Foundry Institute Seoul National University Seoul 08826 Republic of Korea
Abstract
AbstractTo realize wearable displays and interactive soft robots, significant research efforts are focused on developing highly deformable alternating‐current electroluminescent (ACEL) devices. Although soft emission layers are well developed, designing stretchable, conductive, and transparent soft electrodes remains challenging. In this study, ionic hydrogels are prepared comprising a double network (DN) of poly(N‐hydroxyethylacrylamide‐co‐acrylamide)/crosslinked chitosan swollen in aqueous lithium bis(trifluoromethanesulfonyl) imide. Owing to the finely tuned DN structure of the polymeric crosslinker and transparent electrolyte, the developed ionic hydrogels exhibit remarkable stretchability (1400%), excellent optical transmittance (>99%), and high conductivity (1.95 × 10−2 Sm−1). Based on the high performance of the ionic hydrogels, ACEL devices are fabricated with an emission layer containing phosphor microparticles and demonstrate stable, high luminance under extreme deformation, and ultra‐high elongation. The excellent transparency of the ionic hydrogel further enables the fabrication of novel soft ACEL devices with tandem structures by stacking several emission and electrode layers, in which each emission layer is independently controlled with a switch circuit.
Funder
National Research Foundation of Korea
Pusan National University
Subject
Electrochemistry,Condensed Matter Physics,Biomaterials,Electronic, Optical and Magnetic Materials
Cited by
22 articles.
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