Disclosed are an organic light-emitting device and an organic light-emitting display device capable of improving reliability thereof. The organic light-emitting device or the organic light-emitting display device includes an organic encapsulation layer disposed on a light-emitting element, and the organic encapsulation layer includes a first organic encapsulation layer disposed on an inorganic encapsulation layer and a second organic encapsulation layer disposed so as to surround the first organic encapsulation layer and including a moisture-absorbent material. As such, it is possible to achieve a reduction in cost and to prevent moisture or oxygen from being introduced from the outside into the side surface of the organic light-emitting device.

A laminated film containing at least a gas barrier layer and an inorganic polymer layer being laminated on a resin substrate, wherein concerning a distance from a surface of the inorganic polymer layer in a film thickness direction of the layer and the ratio of an oxygen atom to a total amount of a silicon atom, an oxygen atom, a carbon atom and a nitrogen atom, the ratio of a value of the oxygen atomic ratio in a region from a surface on a side opposite to the gas barrier layer up to 30% of a film thickness of the inorganic polymer layer in a depth direction to a value of the oxygen atomic ratio in a region from 30% of a film thickness of the inorganic polymer layer in a depth direction up to a surface on a side of the gas barrier layer is 1.05 or more.

An organic electroluminescent element includes a light emitting layer containing a polycyclic aromatic compound represented by (1) or its multimer having plural structures represented by (1) and an anthracene-based compound represented by (3). In (1) and (3), rings A to C represent optionally substituted aryl rings or heteroaryl rings, X.sup.1 and X.sup.2 represent >O, >NR, >C(R).sub.2, >S, or >Se, R in >NR represents aryl etc., R in >C(R).sub.2 represents hydrogen etc., R in >NR and/or R in >C(R).sub.2 may be bonded to ring A, B, and/or C via linking group or single bond, X's and Ar.sup.4's represent hydrogen or optionally substituted aryls, not all X's and Ar.sup.4's represent hydrogen simultaneously, and at least one hydrogen in compound represented by (1) or (3) may be substituted by halogen etc. In the light emitting layer, concentration of the polycyclic aromatic compound or its multimer changes from a positive electrode layer to a negative electrode layer.

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The present disclosure provides a quantum dot electroluminescent device, which includes: a substrate; an anode disposed on the substrate; a hole transmission layer disposed on the anode; a quantum dot luminescent layer disposed on the hole transmission layer; an electron transmission layer disposed on the quantum dot luminescent layer; and a cathode disposed on the electron transmission layer, wherein the hole transmission layer is a P-type doped hole transmission layer and/or the electron transmission layer is a N-type doped electron transmission layer. The present disclosure further provides a method of manufacturing the quantum dot electroluminescent device. The present disclosure causes degrees of curvature of interfacial energy bands to be different by forming a gradient doping effect in a multi-layer hole transmission layer, so as to form a gradient energy level, that is, the HOMO energy level deepens in order from the anode to the quantum dot luminescent layer, thereby reducing the energy barrier of the holes being injected from the anode to the quantum dot luminescent layer to improve the luminescent efficiency of the device.

Embodiments of the disclosed subject matter provide a depositor device having a first exhaust aperture and a second exhaust aperture, and a plurality of delivery apertures disposed between the first exhaust aperture and the second exhaust aperture. A first aperture of the plurality of delivery apertures may have a first length, and a second aperture of the plurality of delivery apertures may have a second length. The first length may be longer than the second length. The device may include a third aperture of the plurality of delivery apertures which may have a third length, where the second length may be longer that the third length. The plurality of delivery apertures of the device may include three or more delivery apertures having different lengths.

The first region (RG1) contains a first organic material and a metal compound (a compound containing a metal element). The second region (RG2) contains the first organic material and the metal compound. The average intensity of the SIMS profile of the metal element in the second region (RG2) can be lower than the average intensity of the SIMS profile of the metal element in the first region (RG1). Specifically, the average intensity of the SIMS profile of the metal element in the second region (RG2) can be lower than 10%, preferably lower than 1.0%, of the average intensity of the SIMS profile of the metal element in the first region (RG1).

An organic light emitting device, a preparation method therefor, and a display apparatus are provided. The organic light emitting device includes an anode, a cathode, and a light emitting layer and an electron transport layer arranged between the anode and the cathode. The electron transport layer is arranged between the light emitting layer and the cathode. The electron transport layer includes a first host material and a second host material. A mixing ratio of the first host material to the second host material of one side of the electron transport layer close to the light emitting layer is different from a mixing ratio of the first host material to the second host material of one side of the electron transport layer away from the light emitting layer.

An organic light-emitting display panel including: an array substrate, an organic light-emitting element placed on the array substrate and comprising light-emitting pixels, and an encapsulation layer placed on a side of the organic light-emitting element away from the array substrate; the encapsulation layer comprises a first inorganic encapsulation layer having a thickness 10 nm100 nm, a first interlayer bonding layer, and a first organic encapsulation layer along a direction away from the array substrate; refractive indexes of the first inorganic encapsulation layer, the first interlayer bonding layer, and the first organic encapsulation layer are n1, n2 and n3, respectively; the refractive index n2 decreases in gradient along a direction from the first inorganic encapsulation layer toward the first organic encapsulation layer, maximum and minimum refractive indexes of the first interlayer bonding layer are n21 and n22, respectively; n21>n1, n22<n3.

An organic light emitting display device is provided. The organic light emitting display device includes at least two or more light emitting parts between an anode and a cathode and each having a light emitting layer. At least one of the at least two or more light emitting parts includes an organic layer. The organic layer is formed of a compound comprising a functional group that reacts with alkali metals or alkali earth metals and a functional group with electron transport properties.

A light-emitting element with high emission efficiency. The light-emitting element includes a first organic compound, a second organic compound, and a guest material. The LUMO level of the first organic compound is lower than the LUMO level of the second organic compound. The HOMO level of the first organic compound is lower than the HOMO level of the second organic compound. The HOMO level of the guest material is higher than the HOMO level of the second organic compound. The energy difference between the LUMO level of the guest material and the HOMO level of the guest material is larger than the energy difference between the LUMO level of the first organic compound and the HOMO level of the second organic compound. The guest material has a function of converting triplet excitation energy into light emission. The first organic compound and the second organic compound form an exciplex.