Investigation of solution-processed organic light-emitting diode fabrication on patterned line structure using bar-coating method

We have investigated a noncontact bar-coating method with a patterned line structure for a solution-processed organic light-emitting diode, which is suitable for simple and large-area production. The line-and-space (L/S) structure of an insulating photoresist material was effective for the control of a drying process with a pinning effect in a solution process. In a device with an L/S photoresist on an indium tin oxide (ITO) substrate, a uniform emission of more than 30 × 30mm ² was observed.