Hexagonal and Square Patterned Silver Nanowires/PEDOT:PSS Composite Grids by Screen Printing for Uniformly Transparent Heaters

Abstract

Transparent conductive films with hexagonal and square patterns were fabricated on poly(ethylene terephthalate) (PET) substrates by screen printing technology utilizing a poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate) (PEDOT:PSS) and silver nanowire (Ag NWs) composite ink. The printing parameters—mesh number, printing layer, mass ratio of PEDOT:PSS to Ag NWs and pattern shape—have a significant influence on the photoelectric properties of the composite films. The screen mesh with a mesh number of 200 possesses a suitable mesh size of 74 µm for printing clear and integrated grids with high transparency. With an increase in the printing layer and a decrease in the mass ratio of PEDOT:PSS to Ag NWs, the transmittance and resistance of the printed grids both decreased. When the printing layer is 1, the transmittance and resistance are 85.6% and 2.23 kΩ for the hexagonal grid and 77.3% and 8.78 kΩ for the square grid, indicating that the more compact arrangement of square grids reduces the transmittance, and the greater number of connections of the square grid increases the resistance. Therefore, it is believed that improved photoelectric properties of transparent electrodes could be obtained by designing a printing pattern with optimized printing parameters. Additionally, the Ag NWs/PEDOT:PSS composite films with hexagonal and square patterns exhibit high transparency and good uniformity, suggesting promising applications in large-area and uniform heaters.

Invisible Silver Nanomesh Skin Electrode via Mechanical Press Welding

“…Various planarization methods for the AgNW network have been widely studied to solve the above problems, such as (i) coating of a conductive polymer, e.g., poly (3,4-ethylendeioxythiophene):poly(styrenesulfonate) PEDOT:PSS onto the AgNW network [31][32][33][34]; (ii) embedding the AgNWs in a polymer thin film [23,25,30,35,36]; (iii) application of a physical, chemical force to the AgNW network, etc. [37][38][39][40][41].…”

Use of GIS Tools in Sustainable Heritage Management—The Importance of Data Generalization in Spatial Modeling

“…The most popular geometric figures are: triangles, squares, and hexagons; these are the only regular shapes that tessellates the plane with no gaps [49]. In studies performed for the purposes of the article hexagonal grid was used-the higher usefulness of the hexagon over other figures has been repeatedly confirmed in the case of spatial analyses [50][51][52], as well as in other cases [53][54][55][56][57]. The aim of this research was to find the optimal size of the hexagonal grid, to the level of which the data can be generalized, without a significant decrease in the reliability of spatial modeling for various sustainable heritage management needs.…”

Transparent Heaters: A Review

“…Reproduced with permission. [ 179 ] Copyright 2019, MDPI. 3) Polymers/carbon; cross‐section SEM images of a MWCNT/polydimethylsiloxane (PDMS) bilayer film.…”