OLED with a controlled molecular weight of the PVK (poly(9-vinylcarbazole)) formed by a reactive ink-jet process

► Synthesis of PVK thin film using the reactive ink-jet process. ► Introducing the as-synthesized PVK to an OLED device. ► Luminance graphs showing a linear relationship with the reaction time in the turn-on threshold. ► Effects structural conformity of PVK on the hole injection and mobility.