The present invention relates to organic electroluminescent devices, the emitting layer thereof containing a blend of a luminescent material having a narrow singlet-triplet gap and a fluorescent emission material having high steric shielding.

The present disclosure provides an organic thin film and a method for preparing the same, a display device, and an optical device, in which the method includes: providing a base substrate; forming an isomerization generating layer on the base substrate, the isomerization generating layer including a first region and a second region; adding a precursor solution on a surface of the isomerization generating layer away from the base substrate, and allowing surface energy of the second region to be greater than surface energy of the first region, so as to form the organic thin film from the precursor solution, the precursor solution being at least partially located in the second region.

Disclosed is a compound represented by chemical formula (1). In addition, disclosed is an organic electronic element comprising: a first electrode; a second electrode; and an organic layer between the first electrode and the second electrode, wherein the organic layer contains the compound represented by chemical formula (1). Light-emitting efficiency, stability and lifespan may be enhanced when the compound represented by chemical formula (1) is contained in the organic layer.

Print materials described herein include a first polymerization initiator comprising an initiator material having a thermal decomposition rate and a peak photo-initiated decomposition rate, wherein the thermal dissociation rate is higher than the peak photo-initiated decomposition rate; a vinylic monomer; a polyfunctional monomer; scattering particles; and quantum dots. Methods of making a quantum dot material using such print materials, and of incorporating into light emitting devices, are also described.

The organic electric element comprising a compound represented by Formula 1 as material of an emission-auxiliary layer and an electronic device thereof are disclosed, and by comprising the compound represented by Formula 1 in an emission-auxiliary layer, the driving voltage of the organic electric element can be lowered, and the luminous efficiency and life time of the organic electric element can be improved.

Embodiments of the disclosed subject matter provide a device including a micronozzle array having separate redundant groups of depositors that each include a delivery aperture disposed between two exhaust apertures. The device may include a first row of depositors of a first redundant group, each of which may be connected in parallel to first common delivery lines and first common exhaust lines. The device may include a second row of depositors of a second redundant group, each of which is connected in parallel to second common delivery and second common exhaust lines. The first row of depositors and the second row of depositors may operate independently from one another. The device may be disposed within a deposition chamber and in proximity of a substrate.

A light emitting device including a first electrode, a second electrode, a quantum dot layer disposed between the first electrode and the second electrode and a first auxiliary layer disposed between the quantum dot layer and the first electrode, wherein the first auxiliary layer includes nickel oxide nanoparticles having an average particle diameter of less than or equal to about 10 nanometers (nm) and an organic ligand, a method of manufacturing the light emitting device, and a display device including the same.

An organic vapor jet printing (OVJP) device is provided that includes an OVJP print head having a nozzle configured to eject an organic material entrained in a carrier gas, one or more heaters to heat the nozzle, and one or more heat sinks to remove heat from the region of the nozzle. OVJP deposition devices and techniques are also provided in which heat sinks are arranged in the region of one or more OVJP nozzle, which maintain an ambient temperature of not more than 40 C. when the print head is operated at an operating temperature of 450 C.

An organic light-emitting diode (OLED) display panel, a manufacturing method thereof, and a display device are provided. The OLED display panel includes a substrate; an array functional layer; a light-emitting layer; a thin-film encapsulation layer; and a liquid crystal layer, which is disposed on the thin-film encapsulation layer, including a first liquid crystal region arranged on a non-pixel region and a second liquid crystal region arranged on a pixel region, wherein liquid crystal molecules positioned in the first liquid crystal region are aligned parallel to the substrate.

A conductive polymer composition containing: a composite containing a π-conjugated polymer (A) and a polymer (B) shown by the following general formula (2); H.sub.2O (D) for dispersing the composite; and a water-soluble organic solvent (C). This provides a composition which has favorable filterability and film formability, and which is capable of relieving acidity and forming a conductive film with high transparency. Moreover, since the H.sub.2O dispersion of the conductive polymer compound is mixed with an organic solvent, the surface tension and the contact angle are so low that leveling property on a substrate is imparted. The composition is usable in droplet-coating methods. Since an organic solvent having a higher boiling point than H.sub.2O is used as the organic solvent, the composition can avoid solid content precipitation around a nozzle and solid content precipitation due to drying between ejecting the liquid material from a nozzle tip and landing on a substrate.

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