An organic light-emitting device having low-driving voltage, improved efficiency, and long lifespan includes: a first electrode; a second electrode facing the first electrode; a first layer between the first electrode and the second electrode, the first layer including a first compound; a second layer between the first layer and the second electrode, the second layer including a second compound; and a third layer between the second layer and the second electrode, the third layer including a third compound; wherein the first compound does not include a nitrogen-containing heterocyclic group comprising *?N* as a ring forming moiety, and wherein the first compound, the second compound, and the third compound each independently include at least one group selected from groups represented by Formulae A to C:

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A liquid crystal display device, includes a liquid crystal panel; and a backlight unit under the liquid crystal panel and having a light source. The light source includes a first luminous material having a first peak wavelength, a second luminous material having a second peak wavelength greater than the first peak wavelength, a third luminous material having a third peak wavelength greater than the second peak wavelength, and a light absorption material having an absorption maximum at a wavelength between the second peak wavelength and the third peak wavelength.

The present invention relates to mixtures comprising at least one phosphorescent dopant and at least one compound of one of the formulae (1) and (2), and the use thereof in electronic devices, especially in organic electroluminescent devices.

The invention provides a manufacturing method for TFT backplane, through forming an oxygen-containing a-Si layer on the buffer layer and an oxygen-free a-Si layer on the oxygen-containing a-Si layer so that when using a boron induced SPC to crystallize the a-Si thin film, the contact interface between the a-Si thin film and the buffer layer is the oxygen-containing a-Si layer; because the nucleation is not easy to occur in oxygen-containing a-Si layer during high temperature crystallization, the nucleation only occurs top-down in the boron doped layer on the upper surface of the a-Si thin film for good die quality and thin film uniformity to achieve improve crystalline quality and uniformity. The TFT backplane provided by the invention is made with simple process, wherein the crystalline quality and uniformity of the polysilicon layer is preferable, and can enhance the TFT performance and the driving effect.

An organic light emission display device and an encapsulation method therefor are provided. The organic light emission display device includes a base substrate, and an organic light emission diode, a barrier layer and an organic thin film encapsulation layer which are disposed on the base substrate. The organic light emission display device further includes a detection layer disposed on the base substrate; and the detection layer is configured to contact with the organic thin film encapsulation layer and make a change in the case that the organic thin film encapsulation layer overflows the barrier layer.

The present specification provides a multicyclic compound including nitrogen and an organic light emitting device using the same.

A hybrid light emitting device, a display panel, and a display device are disclosed. The hybrid light emitting device comprises a first electrode, a light emitting material composite layer, a hybrid connecting composite layer, a first light emitting layer, and a second electrode which are stacked in this order. The first electrode and second electrode are configured to provide a first carrier and a second carrier during operation, respectively. The hybrid connecting composite layer comprises at least two hybrid connecting layers. In a direction from the first electrode to the second electrode, the at least two hybrid connecting layers increase in term of the first carrier mobility and decrease in term of the second carrier mobility.

An organic light-emitting device having low-driving voltage, improved efficiency, and long lifespan includes: a first electrode; a second electrode facing the first electrode; a first layer between the first electrode and the second electrode, the first layer including a first compound; a second layer between the first layer and the second electrode, the second layer including a second compound; and a third layer between the second layer and the second electrode, the third layer including a third compound; wherein the first compound does not include a nitrogen-containing heterocyclic group comprising *?N* as a ring forming moiety, and wherein the first compound, the second compound, and the third compound each independently include at least one group selected from groups represented by Formulae A to C: ##STR00001##

Novel phosphorescent metal complexes containing ligands having the Formula I:

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bearing either a naphthalene or other fused heterocycle moieties such as benzofuran and benzothiophene useful as emitters in OLEDs and improve the device efficiency and the FWHM of the emission.

A compound is represented by the following formula (1). In the formula (1), Ar is a substituted or unsubstituted aryl group including 6 to 30 ring carbon atoms, R.sup.a are independently a substituted or unsubstituted alkyl group including 1 to 15 carbon atoms, or a substituted or unsubstituted cycloalkyl group including 3 to 15 carbon atoms, R.sup.b1 to R.sup.b4 are independently a halogen atom, a cyano group, a substituted or unsubstituted alkyl group including 1 to 15 carbon atoms, or the like, R.sup.c1 to R.sup.c10 are independently a hydrogen atom, a halogen atom, a cyano group, a substituted or unsubstituted alkyl group including 1 to 15 carbon atoms, or the like, * is a bonding position at which one of R.sup.c1 to R.sup.c10 is bonded to either nitrogen atom, x is an integer from 0 to 3, y is an integer from 0 to 4, and z are independently an integer from 0 to 5. ##STR00001##