Provided is a compound of Formula 1:

##STR00001## Ar.sub.1 to Ar.sub.1 are each independently hydrogen, deuterium, a halogen group, a nitrile group, or a substituted or unsubstituted: silyl, boron, alkyl, alkenyl, alkynyl, alkoxy, aryloxy, cycloalkyl, aryl, or heterocyclic group, or adjacent groups are bonded together to form a substituted or unsubstituted aliphatic hydrocarbon ring; A1 and A2 are each independently hydrogen, deuterium, a halogen group, a nitrile group, or a substituted or unsubstituted: silyl, boron, alkyl, alkenyl, alkynyl, alkoxy, aryloxy, cycloalkyl, aryl, or heterocyclic group, or are bonded together to form a substituted or unsubstituted ring; R.sub.1 to R.sub.3 are each independently hydrogen, deuterium, a halogen group, a nitrile group, or a substituted or unsubstituted; silyl, boron, alkyl, alkenyl, alkynyl, alkoxy, aryloxy, cycloalkyl, aryl, amine, or heterocyclic group; and n1 to n3 are each 0 to 3, and 2 or more, the substituents are the same as or different from each other,
and an organic light emitting device including the same.

To provide an organic electroluminescent device having high efficiency and high driving stability while having a low driving voltage. The organic electroluminescent device has one or more light-emitting layers between an anode and a cathode opposed to each other, wherein at least one of the light-emitting layers is a light-emitting layer composed of a vapor deposition layer containing a first host, a second host and a light-emitting dopant material; the first host is selected from oligopyridine compounds represented by the general formula (1); and the second host is selected from carbazole compounds having two or more carbazole rings, indolocarbazole compounds having an indolocarbazole ring or compounds having a carbazole ring and an indolocarbazole ring.

According to one embodiment, a display device comprising a base, a first insulating layer, a first lower electrode, a second lower electrode, a first wiring, a second insulating layer disposed on the first wiring, a first organic layer disposed on the first lower electrode, a second organic layer disposed on the second lower electrode, a first separation wall disposed on the second insulating layer, and an upper wiring disposed continuously on the first organic layer, the second organic layer, and the first separation wall, wherein the upper wiring is electrically connected to the first wiring via a contact hole that penetrates the first separation wall and the second insulating layer.

The present disclosure relates to compounds of Formula I) as useful materials for OLED's. X.sup.1, X.sup.2 and X.sup.3 are N or C(R.sup.5); Ar.sup.1 and Ar.sup.2 are aryl, heteroaryl or cyano; L.sup.1 is single bond, arylene or heteroarylene; and R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are diarylamino, carbazolyl, heteroaryl, H or alkyl.

##STR00001##

The present disclosure provides an organic light-emitting display panel, a method for preparing the same and a display device. The method includes: providing a substrate, where the substrate includes a non-display area and a display area surrounding the non-display area; forming a barrier layer and a pixel circuit on the substrate, where an orthographic projection of the pixel circuit on the substrate and an orthographic projection of the non-display area on the substrate do not overlap; patterning the barrier layer in the non-display area to form at least one via hole penetrating the barrier layer; patterning the substrate by using the barrier layer as a mask in the non-display area to form a groove; forming a light emitting layer on the pixel circuit; and forming a thin film encapsulation layer covering the light emitting layer and the side wall of the draw-in structure on the light emitting layer.

A deposition mask apparatus including a frame, a supporter including a plurality of supporting members fixed to the frame, and a deposition mask fixed to the frame is provided. The plurality of supporting members include at least a first supporting member that is closest to an intermediate position between a third portion and a fourth portion of the frame and a second supporting member that is located closer to the third portion of the frame than the first supporting member. The first supporting member in a state of warping downward from the frame with a first warping amount supports the deposition mask from below. The second supporting member in a state of warping downward from the frame with a second warping amount that is smaller than the first warping amount supports the deposition mask from below.

Embodiments described herein relate to a device including a substrate, a plurality of adjacent pixel-defining layer (PDL) structures disposed over the substrate, and a plurality of sub-pixels. Each sub-pixel includes adjacent first overhangs, adjacent second overhangs, an anode, a hole injection layer (HIL) material, an additional organic light emitting diode (OLED) material, and a cathode. Each first overhang is defined by a body structure disposed over and extending laterally past a base structure disposed over the PDL structure. Each second overhang is defined by a top structure disposed over and extending laterally past the body structure. The HIL material is disposed over and in contact with the anode and disposed under the adjacent first overhangs. The additional OLED material is disposed over the HIL material and extends under the first overhang.

A mask frame and an evaporation mask assembly. The mask frame has a first surface and a second surface facing away from each other and includes: a frame body, which is formed as a frame structure with an opening; and a support body, provided in the opening and connected to the frame body. The support body includes a plurality of evaporation apertures distributed in an array and a plurality of support units distributed around the evaporation apertures, each support unit includes a supporting portion and a bonding portion extending from the supporting portion toward the evaporation apertures, the supporting portion includes a supporting surface located on the first surface, the bonding portion includes a bonding surface protruding to the second surface in a first direction from the first surface to the second surface.

Structures and methods for manufacturing photovoltaic devices by forming perovskite layers and perovskite precursor layers using vapor transport deposition (VTD) are described.

A deposition system that mitigates feathering in a directly deposited pattern of organic material is disclosed. Deposition systems in accordance with the present disclosure include an evaporation source, an electrically conductive shadow mask, and an electrically conductive field plate. The source imparts a negative charge on vaporized organic molecules as they are emitted toward a target substrate. The source and substrate are biased to produce an electric field having field lines that extend normally between them. The shadow mask and field plate are located between the source and substrate and each functions as an electrostatic lens that directs the charged vapor molecules toward propagation directions aligned with the field lines as the charged vapor molecules approach and pass through them. As a result, the charged vapor molecules pass through the shadow mask to the substrate along directions that are substantially normal to the substrate surface, thereby mitigating feathering in the deposited material pattern.