Abstract: Provided is an organic electroluminescent display panel. The display panel includes a base substrate on which at least two organic electroluminescent devices are disposed. A match of red and green light-emitting materials whose full widths at half maximum of photoluminescence spectra have a difference within a particular range is selected to be applied to red and green light devices of the display panel, ensuring that luminance decay degrees of red light and green light of the display panel are basically the same at a different viewing angle. Thus, an image displayed by the display panel will not become greener or redder for a stronger decay of one of red light and green light so that an image with a relatively good color is presented at a different viewing angle, improving a color cast of the panel at different viewing angles.

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 a hole transporting region disposed between the anode and the cathode; the hole transporting region includes a first organic layer; the first organic layer contains a first p-type dopant and a second p-type dopant; the first p-type dopant is different from the second p-type dopant. The electroluminescent device containing at least two different p-type dopants in the first organic layer in the hole transporting region can maintain a high external quantum efficiency and achieve the great reduction in voltages and the significant improvement in lifetimes, thereby improving the comprehensive performance of the device. Further provided is an electronic assembly containing the organic electroluminescent device.

Abstract: Provided is a top-emission organic electroluminescent device, comprising an anode, a cathode and an emissive layer disposed between the two electrodes; the emissive doped material of the emissive layer has a ?max, the device has a maximum external quantum efficiency conversion rate E=EQEA/EQEB, and satisfies when 500 nm??max?600 nm, E?1.625; when 600 nm<?max?700 nm, E?1.850, and the bottom-emission device has an exciton recombination region whose peak position is located in the emissive layer in a region >0% and ?65% of thickness thereof from the side close to the anode. The top-emission device exhibits more excellent device performance. Further provided are a display assembly comprising the top-emission device and use of the top-emission device in an electronic device, an electronic element module, a display device or a lighting device.

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 organic layer and a second organic layer; the first organic layer comprises a first organic material and a first p-type dopant; the second organic layer comprises a second organic material and a second p-type dopant; the first organic layer is in contact with the second organic layer, and the second organic layer is above the first organic layer; and the p-type dopant has a structure represented by Formula 1. The organic electroluminescent device comprising the p-type dopant of a particular structure and having a particular device structure can significantly improve the overall performance of the device and especially improve the lifetime of the device. Further provided is an electronic 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 cathode; the organic layer includes a first organic layer and a second organic layer; the first organic layer includes a first p-type dopant; the second organic layer includes a second p-type dopant; the first p-type dopant is different from the second dopant; the first organic layer is in contact with the second organic layer, and the second organic layer is above the first organic layer. The organic electroluminescent device including specific p-type dopants and having a specific device structure can significantly improve the overall performance of the device, especially the device lifetime or the device efficiency. Further provided is an electronic assembly including the organic electroluminescent device.

Abstract: Provided is an organic electroluminescent device. The organic electroluminescent device is a bottom-emitting single-layer device. The device has maximum external quantum efficiency EQEmax of more than 26%, and has a high roll-off coefficient of greater than or equal to 0.91 at high brightness of 5000 cd/m2 or 11500 cd/m2.

Abstract: Provided is an organic electroluminescent device. The organic electroluminescent device includes an anode, a cathode and a light-emitting layer disposed between the anode and the cathode, where the light-emitting layer at least comprises a first compound having a structure of Formula 1, Formula 2 or Formula 3, a second compound having a structure of Formula 4 and a third compound comprising a ligand having a structure of Formula 5. The new electroluminescent device has higher device efficiency, a longer device lifetime and better device performance. Further provided are an electronic apparatus and a composition.

Abstract: Provided is an organic electroluminescent device. The organic electroluminescent device comprises a first electrode, a second electrode, and at least two light emitting units disposed between the first electrode and the second electrode, wherein the light emitting units each comprises at least one light emitting layer, and a connection layer of a specific structure is further disposed between adjacent two light emitting units. By using a connection layer of a specific structure, the organic light-emitting device reduces the device voltage, prolongs life time of the device, and improves the device performance.

Abstract: Provided is a new organic electroluminescent device. This new organic electroluminescent device comprises multiple light-emitting units, a second organic layer and a specific connection layer. This new organic electroluminescent device controls LUMOfirst organic material - work functionmetal to be ? 2.1 eV, which can promote a separation of electrons at metal and organic interfaces, suppressing a recombination of carriers at the interfaces. HOMOsecond organic material -LUMOfirst organic material is controlled to be ? 0.3 V, and a hole injection is controlled through an adjustment of a doping concentration of a first organic material, which can balance a recombination of the carriers on a light-emitting layer, significantly improving efficiency and a lifetime of the device and reducing power consumption of the device. This new tandem organic electroluminescent device has more excellent device performance and broader application prospects.

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 organic layer, the first organic layer contains a first organic material and a second organic material that satisfy particular energy level requirements, and the first organic layer has a conductivity greater than or equal to 3×10?5 S/m. The novel organic electroluminescent device effectively controls a hole injection ability so that the overall performance of the device is effectively improved. Further provided are an organic electroluminescent device and a first organic electroluminescent device.

Abstract: Provided are an organic electroluminescent material and a device thereof. The organic electroluminescent material includes a metal M and at least one C{circumflex over (?)}N bidentate ligand La coordinated with the metal M, the maximum emission wavelength of the photoluminescence spectrum of the organic electroluminescent material at room temperature is greater than or equal to 410 nm and less than or equal to 700 nm, and the emission spectrum area ratio of the organic electroluminescent material is less than or equal to 0.145. The metal complex has significant advantages in organic electroluminescent devices, in particular the improvement of device efficiency. Further provided are an organic electroluminescent device including the metal complex and a compound composition including the metal complex.

Abstract: Provided is an electroluminescent device. The organic electroluminescent device comprises an anode, a cathode and an organic layer disposed between the anode and the cathode, where the organic layer comprises a first compound having a structure of H-L-E and a second compound comprising a ligand La having a structure of Formula C. Such a new material combination consisting of the first compound and the second compound can obtain higher efficiency in the device, significantly extend a lifetime, and provide better device performance. Further provided are a display assembly comprising the electroluminescent device and a compound combination.

Abstract: Provided is an electroluminescent device. The organic electroluminescent device comprises an anode, a cathode and an organic layer disposed between the anode and the cathode, where the organic layer comprises a first compound having a structure of H-L1-E and a second compound having a general formula of M(La)m(Lb)n(Lc)q, and the device has at least one maximum emission wavelength greater than 630 nm. Such a new material composition consisting of the first compound and the second compound can be used in a light-emitting layer of the electroluminescent device. The new material composition can achieve the emission of deep red light in the device, significantly reduce a drive voltage of the device while significantly improving device efficiency and/or a device lifetime, and provide better device performance. Further provided is a display assembly.

Abstract: Disclosed is an organic electroluminescent device. The organic electroluminescent device comprises an anode, a cathode and a first organic layer disposed between the anode and the cathode, wherein the first organic layer contains a first compound having a structure of Formula 1 and a second compound having a structure of Formula 2. Such a novel material combination composed of the first compound and the second compound may be used in a hole injection layer in the organic electroluminescent device and can endow the organic electroluminescent device with excellent characteristics of low voltage, high efficiency and a long lifetime and provide better device performance. Further disclosed are a display assembly and a compound combination.

Abstract: Provided is an electroluminescent device. The electroluminescent device includes an anode, a cathode, and an organic layer disposed between the anode and the cathode, wherein the organic layer at least comprises a first compound having a structure of H1-L1-Ar1 and a second compound having a structure of H2-L2-Ar2. These new compound combinations can be used as host materials in electroluminescent devices. These new compound combinations can greatly improve the lifetime of the device and provide the device with better performance. Further provided is a display assembly including the electroluminescent device.

Abstract: Provided is an electroluminescent device. The electroluminescent device includes an anode, a cathode, and an organic layer disposed between the anode and the cathode, wherein the organic layer includes a first metal complex of a ligand having a structure represented by Formula 1 and a first compound having a structure represented by Formula 2. The novel material combination comprising the first metal complex and the first compound can be used in an emissive layer in an electroluminescent device. The novel material combination can enable the novel electroluminescent device to obtain a darker red color, a lower voltage, higher efficiency, and a longer lifetime and can provide better device performance. Further provided are an electronic device and a compound combination.

Abstract: Provided is an organic electroluminescent device. The electroluminescent device includes an anode, a cathode and an organic layer disposed between the anode and the cathode, where the organic layer includes a first compound having a structure of H1-L1-E1 and a second compound having a structure of H2-L2-E2. The electroluminescent device containing a novel material combination has a low driving voltage, high device efficiency and a significantly improved device lifetime, which greatly improves the overall performance of the device. Further provided are an electronic equipment including the preceding electroluminescent device and use of the electroluminescent device in an electronic element module, a display apparatus or a lighting apparatus.

Abstract: Provided is an organic electroluminescent device. The organic electroluminescent device comprises a first electrode, a second electrode, and at least two light emitting units disposed between the first electrode and the second electrode, wherein the light emitting units each comprises at least one light emitting layer, and a connection layer of a specific structure is further disposed between adjacent two light emitting units. By using a connection layer of a specific structure, the organic light-emitting device reduces the device voltage, prolongs life time of the device, and improves the device performance.