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Meeting 2021 TMS Annual Meeting & Exhibition
Symposium Metal-Matrix Composites: Advances in Analysis, Measurement and Observations
Presentation Title 2D Interlayer Enabled Electrical Ductility for Flexible Electronics
Author(s) Pilgyu Kang, Chullhee Cho, Amir Taqieddin, Yuhang Jing, Keong Yong, Jin Myung Kim, Md Farhadul Haque, Narayana R. Aluru, SungWoo Nam
On-Site Speaker (Planned) Pilgyu Kang
Abstract Scope Flexible electrodes are important for next-generation flexible and wearable electronics. However, flexible inorganic electronics integrating stiff metal thin-films on soft substrates suffer interfacial failure substantially reducing lifespan of such devices. We present a 2D-interlayer approach that enhances strain-resilient electrical performance under a high degree of multimodal deformation. Atomically thin 2D-interlayers, such as graphene, induce continuous in-plane crack perturbation in metal films and enable a unique characteristic of ‘electrical ductility’ that allows electrical resistance to gradually increase under strain, whereas bare metal films exhibit unperturbed straight cracks and sudden increase of electrical resistance. 2D-interlayer electrodes sustain 4-5 orders-of-magnitude lower electrical resistance beyond failure strain of conventional metal electrodes. We also show the generality of our approach to use various combination of metals and 2D materials. Finally, we demonstrate enhanced strain resilient electrical functionality for flexible electroluminescent light emitting devices integrated with metal-2D interlayer interconnectors showing potential capability of early damage diagnosis.
Proceedings Inclusion? Planned:
Keywords Thin Films and Interfaces, Composites, Nanotechnology


2D Interlayer Enabled Electrical Ductility for Flexible Electronics
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