Laser patterning of transparent conductive metal nanowire coatings: simulation and experiment
Laser patterning of transparent conductive metal nanowire coatings: simulation and experiment
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DOI：
10.1039/c3nr05504c
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发表时间：
2014-01-01
期刊：
影响因子：
6.7
通讯作者：
Milne, David
中科院分区：
文献类型：
--
作者：
Henley, Simon J.;Cann, Maria;Milne, David
透明和导电的金属纳米线网络是许多光电器件中昂贵的氧化铟锡（ITO）薄膜的可能替代品。ITO薄膜通常使用脉冲激光进行图案化，因此类似的技术可以用于纳米线涂层来定义电极结构。本文模拟了激光照射对银纳米线涂层导电性能的影响，并通过实验研究了在透明衬底上喷涂形成的银纳米线涂层。实验发现了这种纳米线网络的烧蚀阈值，并与膜厚度有关。一个有效的模型，使用有限元传热分析，看看能量耗散通过这些纳米线网络，并用于了解在发挥激光材料相互作用的机制进行了检查。结果表明，涂层的三维特性和横向与纵向热扩散速率的相对比值是影响烧蚀阈值的重要控制参数。
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.