Collection: Ossila Substrates, ITO & Masks

Transparent conductive glass is the starting point of almost every thin-film solar cell and OLED. This collection holds Ossila ITO (indium tin oxide) and FTO (fluorine-doped tin oxide) coated glass substrates, plus the masks used to define electrodes and measure devices.

ITO or FTO?

• ITO glass: 100 nm ± 20 nm ITO on 1.1 mm polished soda lime glass, about 20 Ω/sq, very smooth (1.8 nm RMS). The usual choice for OPV, OLED and inverted perovskite cells processed at moderate temperatures.
• FTO glass: 200 – 300 nm FTO, 6 – 15 Ω/sq depending on grade. It tolerates high-temperature annealing (for example TiO₂ layers at around 450 – 500 °C) and is chemically robust, so it is the standard for dye-sensitized and mesoporous perovskite cells.

Patterned or unpatterned

Pre-patterned substrates in the Ossila 20 x 15 mm and 25 x 25 mm systems are matched to deposition masks, so each substrate yields several pixels of known area without etching. Unpatterned substrates suit STM, conductive AFM, spectroscopy, electrochemistry or your own etched layout. Most items are sold in packs of 100.

Masks and foils

Deposition masks define the top electrodes during evaporation; measurement aperture masks fix the illuminated area so that current density is calculated correctly. Copper foils are also listed here.

Related: four point probes for checking sheet resistance, spin coaters, PEDOT:PSS and solar simulators. Ask us via WhatsApp for sizes, pack quantities and a formal quotation.