OLED Patterning technologies
Patternable OLED
Patternable organic light-emitting device (POLED) uses a light or heat activated electroactive layer. A latent material (PEDOT-TMA) is included in this layer that, upon activation, becomes highly efficient as a hole injection layer. Using this process, light-emitting devices with arbitrary patterns can be prepared.
Inkjet
See “Polymer light-emitting diodes” section above.
Laser patterning
Colour patterning by means of laser, such as radiation-induced sublimation transfer (RIST).
Organic Vapor Jet Printing
OVJP uses an inert carrier gas, such as Argon or Nitrogen, to transport evaporated organic molecules (as in Organic Vapor Phase Deposition). The gas is expelled through a micron sized nozzle or nozzle array close to the substrate as it is being translated. This allows printing arbitrary multilayer patterns without the use of solvents.