Light-emitting device and display device

摘要

A technique of manufacturing a display device with high productivity is provided. In addition, a high-definition display device with high color purity is provided. By adjusting the optical path length between an electrode having a reflective property and a light-emitting layer by the central wavelength of a wavelength range of light passing through a color filter layer, the high-definition display device with high color purity is provided without performing selective deposition of light-emitting layers. In a light-emitting element, a plurality of light-emitting layers emitting light of different colors are stacked. The closer the light-emitting layer is positioned to the electrode having a reflective property, the shorter the wavelength of light emitted from the light-emitting layer is.

主权项

1. A light-emitting device comprising:
a first element comprising:
a first color filter layer; anda first light-emitting element,wherein the first light-emitting element comprises:
a first electrode having a reflective property;a first light-emitting layer over the first electrode; anda second light-emitting layer over the first light-emitting layer; and a second element comprising:
a second color filter layer; anda second light-emitting element,wherein the second light-emitting element comprises:
a second electrode having a reflective property;the first light-emitting layer over the second electrode; andthe second light-emitting layer over the first light-emitting layer, wherein a first optical path length is an optical path length between the first electrode and the first light-emitting layer, and the first optical path length is one-quarter of a first central wavelength of a first wavelength range in which the first color filter layer has a transmittance of 50% or higher in the visible light range, wherein a second optical path length is an optical path length between the second electrode and the second light-emitting layer, and the second optical path length is m-quarters of a second central wavelength of a second wavelength range in which the second color filter layer has a transmittance of 50% or higher in the visible light range, wherein m is an odd number of three or more, and wherein a wavelength of a color of light emitted from the first light-emitting layer is shorter than a wavelength of a color of light emitted from the second light-emitting layer.