Posted in | Transparent Displays

Transparent Conductive Oxides from Omega Optical

Omega Optical’s transparent conductive oxides (TCOs) provide a combination of infrared reflectance, visible transmission, and electrical conductivity. The figures below illustrate two examples of indium tin oxide (ITO). These coatings came out of the R&D department's desire for transparent electrodes with specific work functions that were not commercially available during work on a thin-film photovoltaic project. We have produced a number of variations including Indium Tin Oxide (ITO), Indium Zinc Oxide (IZO), Fluorinated Zinc Oxide (FZO) and Zinc Tin Oxide (ZTO) and are continually adding to this list. By choosing the correct material, we are able to tune the reflection edge and electrical properties of the film to meet your needs. TCO development also led to the introduction of a broad-band hot mirror that blocks all the way out into the IR.

The optical properties of highly conductive ITO are illustrated in the top figure, and the properties of less conductive ITO are shown in the bottom figure. With a change in alloy composition, the electronic work function and the R&T curves also vary.


highlly conductive ITO / less conductive ITO

To deposit TCOs, Omega Optical performs co-sputtering of the constituent materials. Examples include zinc oxide with zinc fluoride, and indium oxide with tin oxide.

  • Specified thickness
  • Custom sizes are available

Applications for Transparent Conductive Oxides

  • Displays
  • Heated windows
  • Photovoltaics
  • SERs substrates
  • RF shielding
  • Electrostatic control

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