Selective multi-nanosoldering for fabrication of advanced solution-processed micro/nanoscale metal grid structures

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Solution-processed metal grid transparent conductors with low sheet resistance, high optical transmittance and good mechanical flexibility have great potential for use in flexible optoelectronic devices. However, there are still remaining challenges to improve optoelectrical properties and electromechanical stability of the metallic structures due to random loose packings of nanoparticles and the existence of many pores. Here we introduce a selective multi-nanosoldering method to generate robust metallic layers on the thin metal grid structures (< a thickness of 200nm), which are generated via self-pining assisted direct inking of silver ions. The selective multi-nanosoldering leads to lowering the sheet resistance of the metal grid transparent conductors, while keeping the optical transmittance constant. Also, it reinforces the electromechanical stability of flexible metal grid transparent conductors against a small bending radius or a repeated loading. Finally, organic light-emitting diodes based on the flexible metal grid transparent conductors are demonstrated. Our approach can open a new route to enhance the functionality of metallic structures fabricated using a variety of solution-processed metal patterning methods for next-generation optoelectronic and micro/nanoelectronic applications.
Publisher
NATURE PUBLISHING GROUP
Issue Date
2020-04
Language
English
Article Type
Article
Citation

SCIENTIFIC REPORTS, v.10, no.1, pp.6782

ISSN
2045-2322
DOI
10.1038/s41598-020-63695-0
URI
http://hdl.handle.net/10203/276128
Appears in Collection
EE-Journal Papers(저널논문)ME-Journal Papers(저널논문)
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