54.3: Realization of Uniform OLED Pixels based on Multi‐nozzle by Inkjet printing

Inkjet printing has been used as an additive manufacturing method to fabricate organic light emitting diode (OLED). By changing the type and proportion of solvent inks adjusting parameters ink droplets, uniform ejection multi-nozzle is achieved volume deviation jet controlled at about 5% when poly(3,4-ethy lenedioxythiohene) : poly (styrenesulfonate) (PEDOT:PSS), hole injection layer materials, was dissolved in isopropanol ethylene glycol (volume ratio 2: 1). Moreover, OLED devices monochrome pixel fabricated based on multi-nozzle, turn-on voltage reduced 3.1v along with improvement brightness efficiency device.