OVJP FOR PRINTING GRADED/STEPPED ORGANIC LAYERS

摘要

An emissive layer deposited in graded manner using a plurality of nozzles is disclosed. A mixtures ejected from the plurality of nozzles may contain varying concentrations of host-to-dopant material. The nozzles, as disclosed, may be arranged in a sequential manner such that the order of the sequence is based on varying concentration of the host-to-dopant material. The nozzles may be configured to translate relative to an area of a substrate to allow sequential deposition.

主权项

1. A device comprising:
a first nozzle configured to eject a first mixture over a first region of a substrate, the first mixture comprising a host and an organic dopant; and a second nozzle configured to eject a second mixture over the first region of the substrate, the second mixture comprising the host and the organic dopant; wherein the first mixture comprises a different ratio of host to organic dopant than the second mixture.