4.8 Article

Laser patterning of transparent conductive metal nanowire coatings: simulation and experiment

期刊

NANOSCALE
卷 6, 期 2, 页码 946-952

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ROYAL SOC CHEMISTRY
DOI: 10.1039/c3nr05504c

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资金

  1. EPSRC [EP/K031562/1] Funding Source: UKRI
  2. Engineering and Physical Sciences Research Council [1105482, EP/K031562/1] Funding Source: researchfish

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Transparent and electrically conductive metal nanowire networks are possible replacements for costly indium tin oxide (ITO) films in many optoelectronic devices. ITO films are regularly patterned using pulsed lasers so similar technologies could be used for nanowire coatings to define electrode structures. Here, the effects of laser irradiation on conducting silver nanowire coatings are simulated and then investigated experimentally for networks formed by spray deposition onto transparent substrates. The ablation threshold fluence is found experimentally for such nanowire networks and is then related to film thickness. An effective model using finite-element heat transfer analysis is examined to look at energy dissipation through these nanowire networks and used to understand mechanisms at play in the laser-material interactions. It is demonstrated that the three-dimensional nature of these coatings and the relative ratios of the rates of lateral to vertical heat diffusion are important controlling parameter affecting the ablation threshold.

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