Premium
An Ultralight Graphene Honeycomb Sandwich for Stretchable Light‐Emitting Displays
Author(s) -
Wang Zhenyu,
Liu Xu,
Shen Xi,
Han Ne Myo,
Wu Ying,
Zheng Qingbin,
Jia Jingjing,
Wang Ning,
Kim JangKyo
Publication year - 2018
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201707043
Subject(s) - materials science , graphene , composite number , polydimethylsiloxane , composite material , honeycomb structure , electrical conductor , porosity , honeycomb , core (optical fiber) , sandwich structured composite , optoelectronics , nanotechnology
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.