Abstract: A display device and a method for manufacturing the display device are provided. The display device comprises a substrate including a first light-emitting portion and a second light-emitting portion spaced apart from each other, a reflective layer spaced apart from each of the first and second light-emitting portions and surrounding the second light-emitting portion, a first light-emitting element including a first light-emitting layer in the first light-emitting portion, and a second light-emitting element including a second light-emitting layer in the second light-emitting portion, wherein the second light-emitting layer emitting light having a wavelength different from light emitted from the first light-emitting layer.

Abstract: An electroluminescent display device includes a substrate on which a plurality of sub-pixels are defined; a first electrode in each sub-pixel on the substrate; a first hole transporting layer on the first electrode; a second hole transporting layer on the first hole transporting layer; a third hole transporting layer on the second hole transporting layer; a light-emitting material layer on the third hole transporting layer; an electron transporting layer on the light-emitting material layer; and a second electrode on the electron transporting layer, wherein the first hole transporting layer includes a P-type dopant and a first hole transporting material, the second hole transporting layer includes the first hole transporting material, and the third hole transporting layer includes a second hole transporting material, and wherein a total thickness of the first and second hole transporting layers is equal to or greater than a thickness of the third hole transporting layer.

Abstract: An organic light emitting diode display device includes a substrate having a plurality of subpixels; and an emitting material layer in the plurality of subpixels on the substrate, wherein the emitting material layer in at least one of the plurality of subpixels comprises: a first emitting material layer including a first host and a dopant; a second emitting material layer on the first emitting material layer and including a second host and the dopant; and a third emitting material layer on the second emitting material layer and including one of the dopant and the second host.