Evidence of low-temperature joints in silver nanowire based transparent conducting layers for solar cells

Arastoo Teymouri*, Esmaeil Adabifiroozjaei, Richard F. Webster, Sara Mesgari Hagh, Xiaojing Hao, Martin A. Green, Supriya Pillai

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

The primary stage of joint formation of silver nanowires (AgNWs) at 60 °C is investigated by using rotary scanning transmission electron microscopy (STEM with tomographic reconstruction images) and super-large-scale molecular dynamic (MD) simulation (2 × 106 atoms). This study proves to establish that silver nanowires do not require the conventional higherature post-treatment process at 200 °C to form fused contacts at the intersections. In fact, a lowerature annealing at 60 °C facilitates formation of highly conductive networks. The connection between the nanowires is made through a stage called thinning, shown in this report for the first time, which occurs before broadening of the nanowires and is caused due to simultaneous effects of loads from the top nanowires and the heating, as confirmed by STEM and MD results. The outcomes of our investigation significantly promote the application of AgNWs as a transparent conductive layer for solar cells with requirement of lowerature processing such as kasterite, perovskite, and organic solar cells.

Original languageEnglish
Pages (from-to)3205-3213
Number of pages9
JournalACS Applied Nano Materials
Volume3
Issue number4
DOIs
Publication statusPublished - 24 Apr 2020

Keywords

  • silver nanowire
  • junction resistivity
  • transparent conductive layer
  • low-temperature process
  • scanning transmission electron microscopy
  • molecular dynamic simulation

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