Crystalline Nanojoining Silver Nanowire Percolated Networks on Flexible Substrate

Qiong Nian, Mojib Saei, Yang Xu, Ganguli Sabyasachi, Biwei Deng, Yong P. Chen, Gary J. Cheng

Research output: Contribution to journalArticle

49 Scopus citations

Abstract

Optoelectronic performance of metal nanowire networks are dominated by junction microstructure and network configuration. Although metal nanowire printings, such as silver nanowires (AgNWs) or AgNWs/semiconductor oxide bilayer, have great potential to replace traditional ITO, efficient and selective nanoscale integration of nanowires is still challenging owing to high cross nanowire junction resistance. Herein, pulsed laser irradiation under controlled conditions is used to generate local crystalline nanojoining of AgNWs without affecting other regions of the network, resulting in significantly improved optoelectronic performance. The method, laser-induced plasmonic welding (LPW), can be applied to roll-to-roll printed AgNWs percolating networks on PET substrate. First principle simulations and experimental characterizations reveal the mechanism of crystalline nanojoining originated from thermal activated isolated metal atom flow over nanowire junctions. Molecular dynamic simulation results show an angle-dependent recrystallization process during LPW. The excellent optoelectronic performance of AgNW/PET has achieved Rs ∼5 Ω/sq at high transparency (91% λ = 550 nm).

Original languageEnglish (US)
Pages (from-to)10018-10031
Number of pages14
JournalACS Nano
Volume9
Issue number10
DOIs
StatePublished - Oct 27 2015
Externally publishedYes

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Keywords

  • junction
  • laser plasmonic welding
  • percolation
  • roll to roll printing
  • silver nanowire

ASJC Scopus subject areas

  • Engineering(all)
  • Materials Science(all)
  • Physics and Astronomy(all)

Cite this

Nian, Q., Saei, M., Xu, Y., Sabyasachi, G., Deng, B., Chen, Y. P., & Cheng, G. J. (2015). Crystalline Nanojoining Silver Nanowire Percolated Networks on Flexible Substrate. ACS Nano, 9(10), 10018-10031. https://doi.org/10.1021/acsnano.5b03601