OTFT Backplanes: Printed Charge Injection Layers
Organic thin film transistor (OTFT) device technology could revolutionize display manufacturing by printing TFT backplanes and further improving the flexibility of displays in future. Clevios™ inkjet grades with tunable workfunctions and conductivities are prime candidates for this new display generation.
Thin Film Transistor (TFT) backplanes of LCD and OLED displays are manufactured in complex processes that include repeated vacuum sputtering and photolithographic patterning steps using expensive masks.
In principle, it is possible to print thin film transistors using organic materials. Organic semiconductors have improved significantly with respect to their charge carrier mobilities and surpass amorphous silicon by far.
Home printing of displays using an inkjet printer is currently not possible, but with ongoing development this might become feasible in the near future for simple displays or sensors. Flexibility of the display backplanes is another consideration and driver of printed organic TFT technology.
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Name | Product Description | Type | Sheet Resistance Range | Printing or Coating Method | Application | |
|---|---|---|---|---|---|---|
| Clevios™ P Jet (OLED) | PEDOT:PSS; Aqueous PEDOT / PSS dispersion, blue liquid | Formulation | > 10E6 Ohm/sq | Spin Coating, Wirebare Coating, Inkjet Printing | OLED Lighting, OLED / QLED Displays |