A display apparatus includes a substrate, a first electrode, a second electrode to be adjacent to the first electrode, a first emission layer on the first electrode, a second emission layer on the second electrode, a first low adhesive pattern between a center of the first emission layer and a center of the second emission layer in a plan view, a first negative charge generation layer continuously disposed to cover the first emission layer, the second emission layer, and the first low adhesive pattern, a first positive charge generation layer on the first negative charge generation layer, a first upper emission layer on the first positive charge generation layer and overlapping the first emission layer, a second upper emission layer on the first positive charge generation layer and overlapping the second emission layer, and a common electrode on the first upper emission layer and the second upper emission layer.

A near-infrared organic EL device with favorable efficiency is provided. A light-emitting device including a first electrode, a second electrode, and an EL layer is provided; in which the EL layer is positioned between the first electrode and the second electrode; in which the EL layer emits light having a peak of an emission spectrum in a wavelength range of greater than or equal to 750 nm and less than or equal to 1000 nm; in which one of the first electrode and the second electrode is an electrode having a transmitting property with respect to light with a peak wavelength of the emission spectrum of the EL layer; in which a first layer is provided in contact with a surface of the electrode having a transmitting property, which is opposite to a surface facing the EL layer; in which the first layer contains an organic compound; and in which the first layer has the local maximum value of an extinction coefficient k in the visible light region.

Embodiments of the disclosed subject matter provide a device having a reflective electrode, and a first organic light emitting device (OLED), where the reflective electrode may be disposed over the first OLED. The device may include a partially reflective electrode, where the first OLED may be disposed over the partially reflective electrode. The device may include a second OLED, where the partially reflective electrode may be disposed over the second OLED. The device may include a first transparent electrode, where the second OLED may be disposed over the transparent electrode, and a substrate, where the transparent electrode may be disposed over the substrate. At least one of the partially reflective electrode and the first transparent electrode may be configured to be independently addressable, and the first OLED may be configured to be separately driven from the second OLED.

A light source device including a substrate, a plurality of first light emitting diode (LED) chips, and at least one second LED chip is provided. The substrate has an upper surface. The plurality of first LED chips are disposed on the upper surface and electrically connected to the substrate. Each of the first LED chips includes a first chip substrate, a first semiconductor layer, and a plurality of first electrodes, and the first electrodes are disposed on the upper surface of the substrate. The second LED chip is disposed on the upper surface and electrically connected to the substrate. The second LED chip includes a second chip substrate, a second semiconductor layer, and a plurality of second electrodes. A thickness of the second chip substrate is different from than a thickness of the first chip substrate, and the second electrodes are disposed on the upper surface of the substrate.

An organic light-emitting display apparatus, including: a first electrode disposed on the substrate; a pixel defining layer covering an edge of the first electrode; a residual layer disposed on the first electrode and the pixel defining layer, the residual layer comprising a fluoropolymer; a first organic functional layer comprising a first light emitting layer disposed on the residual layer on the first electrode; and a second electrode disposed on the first organic functional layer.

An optoelectronic device includes a flexible organic light-emitting diode having a main extension plane, a first retaining element having a first major surface formed in accordance with a bent surface, and a second retaining element, wherein the OLED is arranged between the first retaining element and the second retaining element, and the OLED is mechanically fixed by the first retaining element and/or the second retaining element such that the main extension plane of the OLED is formed in accordance with the bent surface.

Embodiments of the present invention relate to an organic electronic device capable of ensuring high luminous efficiency, low driving voltage and high heat resistance, and improving color purity or lifespan.

A light emitting element unit includes three light emitting elements. A first light emitting element 10a is obtained by laminating a 1a-th electrode 21a, a first organic layer 23a including a first light emitting layer, a 2a-th electrode 22a, a second organic layer 23b including a second light emitting layer, and a third organic layer 23c including a third light emitting layer. A second light emitting element 10b is obtained by laminating the first organic layer 23a, a 1b-th electrode 21b, the second organic layer 23b, a 2b-th electrode 22b, and the third organic layer 23c. A third light emitting element 10c is obtained by laminating the first organic layer 23a, the second organic layer 23b, a 1c-th electrode 21c, the third organic layer 23c, and a 2c-th electrode 22c.

Provided is a light-emitting element with high emission efficiency including a fluorescent material as a light-emitting substance. In a light-emitting element including a pair of electrodes and an EL layer between the pair of electrodes, a delayed fluorescence component due to triplet-triplet annihilation accounts for 20% or more of light emitted from the EL layer, and the light has at least one emission spectrum peak in the blue wavelength range. The EL layer includes an organic compound in which an energy difference between the lowest singlet excited energy level and the lowest triplet excited energy level is 0.5 eV or more. The EL layer includes a benzo[a]anthracene compound.

A display apparatus that includes an OLED (organic light-emitting device) substrate including a first blue light-emitting unit, a green light-emitting unit, and a second blue light-emitting unit which are stacked; and a color controller provided on the OLED substrate to adjust color of a light generated from the OLED substrate.