Buckling Instability Control of 1D Nanowire Networks for a Large-Area Stretchable and Transparent Electrode

Authors
Kim, Byoung SooKwon, HyowonKwon, Hyun JeongPyo, Jun BeomOh, JinwooHong, Soo YeongPark, Jong HyukChar, KookheonHa, Jeong SookSon, Jeong GonLee, Sang-Soo
Issue Date
2020-05
Publisher
WILEY-V C H VERLAG GMBH
Citation
ADVANCED FUNCTIONAL MATERIALS, v.30, no.21
Abstract
A commonly used strategy to impose deformability on conductive materials is the prestrain method, in which conductive materials are placed on prestretched elastic substrates and relaxed to create wavy or wrinkled structures. However, 1D metallic nanowire (NW) networks typically result in out-of-plane buckling defects and NW fractures, due to their rigid and brittle nature and nonuniform load transfer to specific points of NW. To resolve these problems, an alternative method is proposed to control the elastic modulus of 1D NW networks through contact with various solvents during compressive strain. Through solvent contact, the interface interactions between the NWs and between the NW and substrate can be controlled, and it is shown that the surface instability of the 1D random network is formed differently from a uniform bilayer film, which also can vary with the modulus of the network. For modulus values lower than the critical point, slippage and rearrangement of NW strands mainly occur and individual strands in the network show an in-plane wavy configuration, which is ideal for structural stretchability. Based on the solvent-assisted prestrain method, letter-sized, large-area stretchable, and transparent electrodes with high transparency and conductivity are achieved, and stretchable and transparent alternating current electroluminescent devices for stretchable display applications are also realized.
Keywords
HIGH-PERFORMANCE; FILMS; SILICON; HIGH-PERFORMANCE; FILMS; SILICON; buckling instability; nanowire networks; stretchable electrodes; transparent electrodes
ISSN
1616-301X
URI
https://pubs.kist.re.kr/handle/201004/118682
DOI
10.1002/adfm.201910214
Appears in Collections:
KIST Article > 2020
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