The effect of grid shape on the properties of transparent conductive films based on flexographic printing


The effect of grid shape on the properties of transparent conductive films (TCFs) is theoretically analyzed and experimentally verified. The light transmittance by three types of grid shapes: triangle, square and hexagon have been theoretically calculated and simulated. It was found that hexagonal grid unit has the highest light transmittance limit under the practical lattice parameters and its decrease in light transmittance caused by the increase of line width in printing process is the least. The grid of three different shapes with same theoretical transmittance is fabricated through flexographic printing. The result shows that the actual light transmittance of the printed TCFs is lower than its theoretical value because of the inevitable width increase of printed grid lines, with slight difference between the three shapes. However, it is greatly different in terms of conductivity, leading to variation in the quality factor Q (defined as the ratio of light transmittance to total resistance) which represents the performance of TCFs. The Q of hexagonal grid (6.04) is the highest, which is 21% higher than that of the square grid.

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Correspondence to YanFang Xu.

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Liu, W., Fang, Y., Xu, Y. et al. The effect of grid shape on the properties of transparent conductive films based on flexographic printing. Sci. China Technol. Sci. 57, 2536–2541 (2014).

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  • metal grid
  • transparent conductive films
  • flexographic printing
  • grid shape
  • quality factor Q