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ITO Glass Substrates, 20 x 15 mm (Legacy, Generation I)

Patterned ITO substrate OLEDs (pixelated anode)

This product has been discontinued

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Pre-patterned ITO substrates for OLED and OPV fabrication and testing. Use these substrates with our electrode deposition masks (6-pixel design) to create individual pixels.

ITO Glass Photovoltaic Substrate

There is a newer version of this product. Our generation I substrates and masks have now been discontinued and so are no longer available for purchase. Please contact us for further details.

Ossila's ITO substrates are manufactured from commercial-grade ITO used in the flat-panel display industry in order to endure high consistency and very low defect rates. Each substrate has six ITO fingers, which when used with an Ossila evaporation shadow mask, creates six independent devices with dimensions of 1.5 mm x 3 mm (v1 cathode mask) or 1.5 mm x 4 mm (v2 cathode mask).

An additional cathode strip at the top of the substrate allows easy connection of both anodes and cathodes by attachment of electrical connection legs. A simple cleaning procedure then provides a clean and hydrophilic surface perfect for spinning PEDOT:PSS.


Substrate Size 20 mm x 15 mm
Pack Size 100 substrates per standard pack
Thickness 1.1 mm
Pixel Dimensions (with Cathode) 3 mm x 1.5 mm (4.5 mm2)
Glass Type Polished soda lime, float glass
Substrate Coating Fully oxidized ITO
ITO Thickness 100 nm
ITO Resistance 20 Ω / square
Glass Roughness <1 nm RMS By AFM
ITO Roughness 1.8 nm RMS (By AFM)
OLED substrate with 6-pixels
Pixelated anode substrate overview
Device Schematic and a completed device.


We use the following cleaning routine for OPVs and OLEDs:

  • Sonicate in 1 vol.% Hellmanex solution for 5 mins in hot sonic bath
  • Rinse twice in hot water (dump rinse)
  • Sonicate in isopropyl alcohol (IPA) for 5 min in warm sonic bath
  • Rinse twice in warm water (dump rinse)

Hydrophilic surface treatment

We recommend finishing the cleaning routine with a final step of either sonication in sodium hydroxide (NaOH) solution or treatment with UV Ozone, which will provide a more uniformly hydrophilic surface to make the deposition of PEDOT:PSS more reproduceable.

          • Sonicate in fresh 10 vol.% NaOH solution for 5 mins in warm sonic bath
          • Rinse twice in hot water (dump rinse)
          • Store immersed in water until required
          • N2 blow dry

          Note: Exact times will depend upon the power and temperature of the sonic bath. Furthermore, excessive sonication in NaOH can also increase the resistance of the ITO surface.


          AFM scan of ITO substrate
          10 µm x 10 µm AFM scan with Z-scale of ±5 nm.
          AFM of glass surface of ITO substrates
          AFM of glass surface (1 µm x 1 µm x 3.5 nm).
          Transmittance of ITO
          Transmittance of ITO substrates.

          Download data as Excel spreadsheet here.

          To the best of our knowledge the information provided here is accurate. The values provided are typical at the time of manufacture and may vary over time and from batch to batch. Products may have minor cosmetic differences (e.g. to the branding) compared to the photos on our website. All products are for laboratory and research and development use only.

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