An organic electroluminescence device comprising: an anode, a cathode, and an emitting region between the anode and the cathode, wherein the emitting region comprises a first emitting layer and a second emitting layer, the first emitting layer and the second emitting layer are directly adjacent to each other, the first emitting layer is between the anode and the second emitting layer, and one of the first emitting layer and the second emitting layer comprises a compound having at least one deuterium atom.

The present invention is directed to a tandem-structured bio-organic light emitting diode (bio-OLED) for photodynamic therapy, and to a photodynamic therapy device including the same to convert a red light emitted from the bio-organic light emitting diode into a near-infrared light (NIR) emission, thereby enabling the use of a PBM therapy in a wide wavelength range of 600 to 1,000 nm.

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 display device is provided. The display device comprises a substrate, at least one thin-film transistor disposed on the substrate, a planarization layer disposed on the thin-film transistor, a first metal layer disposed on the planarization layer and connected to the thin-film transistor, a first electrode disposed on the first metal layer, partitioning walls disposed on the planarization layer and spaced apart from the first electrode, wherein each of the partitioning walls includes a second metal layer and a first conductive layer, a pixel defining layer disposed on the first electrode and the partitioning walls, an organic layer disposed on the first electrode and the pixel defining layer, and a second electrode disposed on the organic layer, wherein the second metal layer is disposed under the first conductive layer and has an undercut beneath the first conductive layer, wherein at least portion of the organic layer is discontinuous between the partitioning walls.

A light emitting device includes: a first electrode; a second electrode overlapping the first electrode; m light emitting units between the first electrode and the second electrode; and m-1 charge generating layers between adjacent light emitting units, wherein the charge generating layer includes: an n-type charge generating layer and a p-type charge generating layer; at least one of a plurality of n-type charge generating layers includes a dopant including an alkali metal, and at least one of a plurality of n-type charge generating layers includes a dopant including a lanthanum metal; contents of the alkali metal and the lanthanum metal doped in the n-type charge generating layer are different from each other; and the m is a natural number of greater than or equal to 3.

An organic light emitting device having a structure that a plurality of light emitting units are deposited, is disclosed, of which white color shift caused by variation of a viewing angle is reduced through a combination between dopant materials of the respective light emitting units. The organic light emitting device includes dopant materials emitting light of different wavelengths from the plurality of light emitting units. Therefore, in the organic light emitting device, variation of color and luminance, which is perceived by a user as a viewing angle is varied, may be reduced.

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.

An embodiment of the present invention provides an organic compound represented by following Formula:

##STR00001##

wherein each of X.sub.1 to X.sub.5 is independently selected from a carbon atom (C) or a nitrogen atom (N), and at least two or three of X.sub.1 to X.sub.5 are N, wherein each of R.sub.1 and R.sub.2 is independently selected from a substituted or non-substituted aryl group or a substituted or non-substituted heteroaryl group, and “a” is an integer between zero (0) to 3, and wherein each of L.sub.1 and L.sub.2 is independently selected from a substituted or non-substituted arylene group or a substituted or non-substituted heteroarylene group, and “b” is zero (0) or 1. The present invention also provides an organic light emitting diode and an organic light emitting display device including the organic compound. The organic compound of the present invention is capable of reducing a driving voltage of an organic light emitting diode and improves a current efficiency and a lifetime of the organic light emitting diode and the organic light emitting display device including the same.

The present invention relates to a first and second organic semiconductor layer and an organic electronic device comprising the same, wherein the organic electronic device comprises an anode, a first organic semiconductor layer, a second organic semiconductor layer and a cathode; wherein a) the first organic semiconductor layer comprises: a metal dopant, and a compound of Formula (I); and b) the second organic semiconductor layer comprises at least one radialene compound.

##STR00001##

An organic light-emitting diode (OLED) display may have an array of organic light-emitting diode pixels that each have OLED layers interposed between a cathode and an anode. Voltage may be applied to the anode of each pixel to control the magnitude of emitted light. The conductivity of the OLED layers may allow leakage current to pass between neighboring anodes in the display. To reduce leakage current and the accompanying cross-talk in a display, the pixel definition layer may disrupt continuity of the OLED layers. The pixel definition layer may have an undercut to disrupt continuity of some but not all of the OLED layers. The undercut may be defined by three discrete portions of the pixel definition layer. The undercut may result in a void that is interposed between different portions of the OLED layers to break a leakage path formed by the OLED layers.