Method for forming functional layer of organic light-emitting device and method for manufacturing organic light-emitting device

摘要

A method of forming a hole transport layer in which an amount of ink per unit surface area to be applied to a plurality of groove regions is set so as to decrease in an order R, G, B. Prior to applying the ink, a nozzle head is scanned across while applying only solvent to each of the groove regions. At this time, an amount of the solvent to be applied to the groove regions is set so as to increase in the order R, G, B.

主权项

1. A method of forming a functional layer of an organic light-emitting device in which a plurality of pixels are disposed, each including a plurality of sub-pixels of different colors arranged next to one another, by a process including: preparing a bank substrate including a base substrate and a plurality of banks extending in one direction, parallel to each other, along a surface of the base substrate; applying ink to each of a plurality of groove regions between adjacent ones of the banks; and drying the ink after application, the method comprising:
defining a plurality of groove region groups on the bank substrate, each including a plurality of groove regions arranged next to one another for sub-pixels of different colors; for each of the groove region groups, setting an amount of the ink per unit surface area applied to a subset of groove regions to be smaller than an amount of the ink per unit surface area applied to remaining groove regions in the groove region group; before or after applying the ink to the groove regions,
applying a solvent able to dissolve the ink to the subset of the groove regions, andeither not applying the solvent or applying the solvent in a smaller amount per unit surface area than in the subset of the groove regions to the remaining groove regions; and drying ink layers formed in the groove regions by the application of the ink and the solvent.