An Ultralight Graphene Honeycomb Sandwich for Stretchable Light-Emitting Displays

Zhenyu Wang, Xu Liu, Xi Shen, Ne Myo Han, Ying Wu, Qingbin Zheng, Jingjing Jia, Ning Wang, Jang Kyo Kim

Research output: Contribution to journalArticlepeer-review

69 Scopus citations

Abstract

Materials that can simultaneously achieve excellent electrical conductivity and stretchability are essential components for the next-generation stretchable electronics. Herein, a highly conductive and stretchable graphene honeycomb (GHC) sandwich consisting of a porous GHC/polydimethylsiloxane (PDMS) composite core and ultrahigh-density graphene foam/PDMS composite face sheets is rationally assembled. The GHCs prepared by a 3D printing technique possess a long-range ordered hexagonal porous structure with an ultralow density of 3.25 mg cm−3 and deliver an excellent electrical conductivity of 72 S m−1. To the best of authors' knowledge, they are the lightest honeycomb structure reported in open literature. The highly porous GHC core endows the sandwich with an ultralow resistance change over large external strains of 60% with excellent structural durability. A stretchable light-emitting display is demonstrated using the sandwich as the electric circuit and light-emitting diodes as the pixels, which exhibits reliable lighting performance under different loading conditions.

Original languageBritish English
Article number1707043
JournalAdvanced Functional Materials
Volume28
Issue number19
DOIs
StatePublished - 9 May 2018

Keywords

  • composites
  • graphene honeycombs
  • light-emitting displays
  • stretchable conductors
  • ultralight sandwich structures

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