Abstract: Provided are an organic electroluminescent material and device thereof. The organic electroluminescent material is a compound having a structure of Formula 1. The compound can be used as a host material, an electron transporting material or a hole blocking material in the organic electroluminescent device and can significantly improve the overall performance of the device, for example, a low drive voltage, high device efficiency and a significantly improved device lifetime. Further provided are an organic electroluminescent device including the compound of Formula 1 and a compound composition.

Abstract: Provided are an organic electroluminescent material and a device comprising the same. The organic electroluminescent material is a metal complex having a structure of Formula 1, and the structure of Formula 1 includes a ligand La having a specific substituent and a ligand Lb having a specific substituent. When applied to the electroluminescent devices, these new compounds can provide excellent device performance such as improved device efficiency, an extended device lifetime, and reduced device capacitance, and facilitate the improvement of the overall performance of the devices. Further provided are an organic electroluminescent device including the metal complex and a composition including the metal complex.

Abstract: Provided is an organic electroluminescent device. The organic electroluminescent device includes an anode, a cathode and a first organic layer and a second organic layer disposed between the anode and the cathode, where the first organic layer comprises a first compound having a structure of Formula 1, and the second organic layer comprises a second compound having a structure of Formula 3. The electroluminescent device exhibits excellent device performance, for example, higher efficiency and an extremely narrow full width at half maximum. Further provided is a display assembly comprising the organic electroluminescent device.

Abstract: Provided is an organic electroluminescent device. The organic electroluminescent device comprises an anode, a cathode, and a first organic layer and a second organic layer disposed between the anode and the cathode, where the first organic layer comprises a first compound represented by Formula 1, and the second organic layer comprises a second compound represented by Formula 2 or Formula 3 and a third compound represented by Formula 4. The first compound can be used as an electron blocking material in the organic electroluminescent device, and the second compound and the third compound can be used as dual host materials in the organic electroluminescent device. The electroluminescent device is capable of maintaining a low voltage or further reducing the device voltage and improving device efficiency and lifetime, thereby improving the overall performance of the device. Further provided is an electronic device including the organic electroluminescent device.

Abstract: An auxiliary charging system and a control method thereof are provided in the present invention. The auxiliary charging system is adapted to an electric vehicle and includes a computing core, a driving charging module, a landing gear, and at least one auxiliary wheel. The driving charging module is disposed in a vehicle frame and coupled to the computing core. The landing gear is rotatably disposed in the vehicle frame and controlled by the computing core. The at least one auxiliary wheel is pivotally connected to the landing gear and connected to the driving charging module. The first battery pack of the electric vehicle is coupled to the driving charging module and the computing core, and the second battery pack is coupled to the driving charging module and the computing core.

Abstract: Provided is an organic electroluminescent device. The organic electroluminescent device comprises an anode, a cathode, and an organic layer disposed between the anode and the cathode, wherein the organic layer comprises a first metal complex with a ligand having a structure of Formula 1, a first compound having a structure of Formula 2 or Formula 3, and a second compound having a structure of Formula 4. The electroluminescent device exhibits good overall device performance, such as higher efficiency and a longer lifetime. Further provided are a display assembly comprising the organic electroluminescent device and a compound composition comprising a first metal complex with a ligand having a structure of Formula 1, a first compound having a structure of Formula 2 or Formula 3, and a second compound having a structure of Formula 4.

Abstract: Provided is an organic electroluminescent device. The organic electroluminescent device comprises: an anode, a cathode, an emissive layer disposed between the anode and the cathode, and an electron blocking layer disposed between the anode and the emissive layer, wherein the electron blocking layer comprises an electron blocking material; the capacitance of the organic electroluminescent device satisfies the following condition: at 500 Hz, a maximum capacitance value of the organic electroluminescent device is Cmax, and ?C=C0?Cmax?0.4 nF; the electron blocking material has a hole mobility ?h?65×10?5 cm2/(V·s); a hole-only device of the emissive layer has a drive voltage VHOD@J10?8.0 V at a current density of 10 mA/cm2, and an electron-only device of the emissive layer has a drive voltage VEOD@J10?8.0 V at a current density of 10 mA/cm2.

Abstract: Provided is an organic electroluminescent device. The organic electroluminescent device comprises a cathode, an anode, and an emissive layer disposed between the cathode and the anode, wherein the emissive layer comprises at least a first host compound, a second host compound, and a first metal complex. A capacitance property of the organic electroluminescent device satisfies the following condition: at 500 Hz, a maximum capacitance value of the organic electroluminescent device is Cmax, and Cmax?Cmax0??0.20 nF, wherein Cmax0 denotes a maximum capacitance value of an organic electroluminescent device A at 500 Hz. The organic electroluminescent device can greatly reduce device capacitance, which is conducive to improving a response rate of the device at a low grayscale and increasing a refresh rate of the device, and further improve device efficiency. Further provided is a display assembly comprising the organic electroluminescent device.

Abstract: Provided is an organic electroluminescent device. The organic electroluminescent device includes an anode, a cathode and an organic layer disposed between the anode and the cathode, where the organic layer comprises at least a light-emitting layer, where the light-emitting layer comprises a first compound having a structure of Formula 1, a first host material having a high triplet energy level and a second host material having a high triplet energy level. The electroluminescent device exhibits excellent overall device performance, for example, a low voltage, high efficiency and a long lifetime. Further provided are an electronic device comprising the organic electroluminescent device and a compound composition comprising a first compound having a structure of Formula 1, a first host material having a high triplet energy level and a second host material having a high triplet energy level.

Abstract: Provided are an organic electroluminescent material and a device comprising the same. The organic electroluminescent material is a compound having a structure of Formula 1, and the compound can be used as an electron blocking material, a hole transporting material or a host material in an organic electroluminescent device. The compound enables the organic electroluminescent device to maintain a low voltage level or further reduce the voltage, have higher device efficiency and/or a longer device lifetime, and provide better overall performance of the device. Further provided are an organic electroluminescent device comprising the compound and a compound composition comprising the compound.

Abstract: Provided is an organic electroluminescent device and use thereof. The organic electroluminescent device comprises a first emissive layer, the first emissive layer comprises a first compound and a first metal complex having a ligand L a having a specific structure. The maximum capacitance of the organic electroluminescent device is at least 0.35 nF lower than the maximum capacitance of an organic electroluminescent device whose first emissive layer comprises the first metal complex and GH0. The organic electroluminescent device has lower maximum capacitance, thereby improving the response time and the refresh frequency of an OLED display device at low grayscales. Further provided is a display assembly comprising the organic electroluminescent device.

Abstract: Provided is an organic light-emitting material having an ancillary ligand with partially fluorinated substituents. The organic light-emitting material is a metal complex having a diketone ancillary ligand with partially fluorinated substituents and may be used as a light-emitting material in an organic electroluminescent device. These new types of metal complex can fine-tune the emission wavelength more effectively, reduce voltage, improve efficiency, prolong lifetimes, and provide better device performance. Further provided are an organic electroluminescent device and a compound formulation.

Abstract: A metal electrode of a ceramic capacitor and a method of forming the same are provided. The method includes mixing metal powders and a barium titanate organic-precursor to obtain precursor powders; adding an adhesive to the precursor powders to obtain a metal slurry; performing a molding process to the metal slurry to obtain a film material; performing a binder burn-out process to the film material to obtain a degumming film; and performing a sintering process to the degumming film to obtain the metal electrode. By mixing specific amount of barium titanate organic-precursor with the metal powders, the barium titanate metallic organic-precursor can be transformed to barium titanate in the following process, and barium titanate can be dispersed between the metals homogeneously. Therefore, electrode continuity can be increased.

Abstract: Provided are an organic electroluminescent material and a device thereof. The organic electroluminescent material is a metal complex having a ligand of a structure of Formula 1 and can be used as an emissive material in an emissive layer of an organic electroluminescent device. The metal complexes having these new ligands can achieve a significant red shift of the maximum emission wavelength of the device, effectively control the emitted color of the device, achieve deeper red luminescence, significantly improve the efficiency of the device, and reduce the voltage of the device. These new metal complexes can provide better device performance. Further provided are an electroluminescent device including the metal complex and a compound composition including the metal complex.

Abstract: Provided is an organic electroluminescent device and an application thereof. The organic electroluminescent device includes a metal complex having a substituent A capable of reducing a maximum capacitance in the device, and the metal complex can be used as an emissive material in an emissive layer of the electroluminescent device. The device including a metal complex having the substituent A can obtain a decrease in the maximum capacitance of the device, thereby improving the response time and refresh frequency of an OLED display device at a low grayscale. In another aspect, the substituent A can cause a decrease in the maximum capacitance of the device, and the device prepared with the metal complex including the substituent A can still maintain excellent device performance compared with the devices prepared with the metal complexes that do not include the substituent A. Further provided is an electronic assembly including the organic electroluminescent device.

Abstract: Provided are a phosphorescent organometallic complex and a use thereof. The metal complex has a ligand with a structure represented by Formula 1 and may be used as a light-emitting material in an electroluminescent device. These novel metal complexes can not only maintain low voltage and improve device efficiency in electroluminescent devices but also greatly reduce the half-peak width of light emitted by these devices so as to greatly improve color saturation of the light emitted by these devices, thereby providing better device performance. Further provided are an electroluminescent device and a compound formulation.

Abstract: Provided are an organic electroluminescent material and a device comprising the same. The organic electroluminescent material is a metal complex comprising a ligand La having a structure of Formula 1, where the ligand La has a (6-5-6)-multi-membered fused cyclic structural unit and comprises particular substituents R1 and Rn. These new compounds are applied to electroluminescent devices so that very excellent device performance can be obtained, full widths at half maximum of emission spectra can be further reduced while high performance of the devices can be maintained, the luminescence saturation of the devices can be improved and the devices can have high efficiency under a condition of being closer to a BT.2020 commercial luminescence requirement. Further provided are an organic electroluminescent device comprising the metal complex and a composition comprising the metal complex.

Abstract: Disclosed is an organic electroluminescence device. The organic electroluminescence device has an organic layer having a specific combination in which a hole transporting material is doped with a p-type conductive doped material. The organic electroluminescence device can provide better device performance, such as lifetime improvement and voltage reduction.

Abstract: Provided are an organic electroluminescent device and a use thereof. The organic electroluminescent device comprises a metal complex having particular spectral characteristics (that is, satisfying requirements on D and AR), and the metal complex can better approach the commercially pursued BT.2020 luminescence. Compared with a metal complex that does not satisfy the requirements on D and AR, the metal complex is applied to the organic electroluminescent device to make the obtained organic electroluminescent device have higher device efficiency and more saturated green light emission, can better satisfy the BT.2020 luminescence requirement of the market, and can still maintain high device performance, especially device efficiency, when approaching the BT.2020 luminescence, and the metal complex basically reaches maximum efficiency of the device. The organic electroluminescent device comprising the preceding metal complex has a broad commercial application prospect and can achieve more saturated luminescence.

Abstract: Disclosed are an aromatic amine derivative and an organic electroluminescent device including the same. A fluorenyl/silafluorenyl group having an ortho-substituted group is introduced into the structure of the aromatic amine derivative. The aromatic amine derivative may be used as a light-emitting material in a light-emitting layer of an organic electroluminescent device. These novel compounds can provide better device performance.