研究目的
Investigating the morphology, efficiency, and properties of silver nano wires networks in transparent conductive films as an alternative to Indium Tin Oxide (ITO) for flexible devices.
研究成果
A computational method has been developed to investigate the morphology, utilization efficiency, and electrical properties of a silver nano wire network. The size of an RVE for a nano wire network is determined by analyzing the stabilization of the backbone fractions or the sheet resistances in a series of observation windows with different sizes. To improve the conductivity of a silver nano wire network, one may consider increasing the concentration of nano wires. However, this method decreases the optical transmittance of the network. High optical transmittance is also a major requirement of transparent conductive film. Consequently, we recommend improving the utilization efficiency of nano wires in a random network by increasing both the aspect ratio and the concentration of the nano wires, to achieve better optical and electrical properties.
研究不足
The study focuses on computational modeling and does not include experimental validation. The junction resistance is considered constant for all contacts between the nano wires, which may not accurately reflect real-world conditions.
1：Experimental Design and Method Selection:
A computational method was developed to investigate the morphology, utilization efficiency, and electrical properties of a silver nano wire network. The size of an RVE for a nano wire network was determined by analyzing the stabilization of the backbone fractions or the sheet resistances in a series of observation windows with different sizes.
2：Sample Selection and Data Sources:
Networks consisting of randomly oriented nano wires were studied numerically. The statistical results of 25 samples were used to find the RVE size and to estimate the efficiency of the networks; 10 samples were used to study the conductivity and transparency of the networks.
3：List of Experimental Equipment and Materials:
The electrical resistivity of silver was set to 2.26 × 10?8 Ω m, and the nano wire diameter was 50 nm in all of the examples. Nano wires of four distinct aspect ratios, 50, 100, 300, and 600, were considered for different networks.
4：26 × 10?8 Ω m, and the nano wire diameter was 50 nm in all of the examples. Nano wires of four distinct aspect ratios, 50, 100, 300, and 600, were considered for different networks.
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The process for generating a quasi-2D structure was a simplified version of the algorithm for a 3D network described in previous work. The network was classified into families that are meaningful in terms of the electrical conductivity. The electrically conductive backbone was extracted by removing the non-conducting branches.
5：Data Analysis Methods:
The sheet resistance and transparency of networks were calculated based on the predicted RVEs, to analyze the effects of nano wire networks on the electrical and optical properties of conductive films.
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