Colloidal-structured metallic micro-grids: High performance transparent electrodes in the red and infrared range

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Abstract

One of the most promising approaches to produce industrial-compatible Transparent Conducting Materials (TCMs) with excellent characteristics is the fabrication of TCO/metal/TCO multilayers. In this article, we report on the electro-optical properties of a novel high-performing TCO/metal/TCO structure in which the intra-layer is a micro-structured metallic grid instead of a continuous thin film. The grid is obtained by evaporation of Ag through a mask of polystyrene colloidal micro-spheres deposited by the Langmuir-Blodgett method and partially dry-etched in plasma. IZO/Ag grid/IZO structures with different thicknesses and mesh dimensions have been fabricated, exhibiting excellent electrical characteristics (sheet resistance below 10 Ω/□) and particularly high optical transmittance in the near-infrared spectral region as compared to planar (unstructured) TCM multilayers. Numerical simulations were also used to highlight the role of the Ag mesh parameters on the electrical properties.

Original languageEnglish
Pages (from-to)7-12
Number of pages6
JournalSolar Energy Materials and Solar Cells
Volume197
DOIs
Publication statusPublished - 1 Aug 2019

Keywords

  • Ag micro-grid
  • IR trasmittance
  • Multilayer thin film
  • Transparent conductive electrodes

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