Abstract: Provided are an organic electroluminescent material and a device including the same. The organic electroluminescent material is a polycyclic compound having a structure of Formula 1, and the compound can be used as a TADF material in an organic electroluminescent device. The polycyclic compound has a regulating effect on the luminescent color, can achieve the desired green light emission, and enables the device to exhibit a narrow full width at half maximum and higher efficiency and demonstrating very broad industrial application prospects. Further provided are an organic electroluminescent device including the compound and a compound composition including the compound.

Abstract: Provided are an organic electroluminescent material and device thereof. The organic electroluminescent material is a polycyclic compound having a structure of Formula 1, and the compound can be used as a thermally activated delayed fluorescence (TADF) material in an organic electroluminescent device. The polycyclic compound has a regulatory effect on the luminescent color, can achieve the desired green light emission, and has deeper highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energy levels, thereby possessing the potential to become an excellent luminescent material and demonstrating very broad industrial application prospects. Further provided are an organic electroluminescent device comprising the compound and a compound composition comprising the compound.

Abstract: Provided is an organic electroluminescent device. The organic electroluminescent device has an organic layer comprising at least a fluorescent material and a metal complex. The fluorescent material has a structure represented by Formula 1, and the metal complex comprises a ligand with a structure represented by Formula 2. The organic electroluminescent device uses a phosphorescent material to sensitize the fluorescent material so that the prepared organic electroluminescent device has a narrower full width at half maximum and higher efficiency. Further provided is a display apparatus comprising the organic electroluminescent device.

Abstract: Provided are an organic electroluminescent material and a device thereof. The organic electroluminescent material is a metal complex including a ligand La having a structure of Formula 1, and the metal complex can be used as luminescent materials in electroluminescent devices. These new compounds, when used in electroluminescent devices, can show better performance, provide lower device voltage and higher device efficiency, and significantly improve the comprehensive performance of devices. 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. The organic electroluminescent device has a first metal complex containing a ligand with a structure of Formula 1 and a first compound with a structure of Formula 2. Compared with the related art, a combination of such two compounds can significantly improve performance of the organic electroluminescent device, such as external quantum efficiency, power efficiency and current efficiency of the device. Further provided are an electronic apparatus including the organic electroluminescent device and a compound composition containing the first metal complex and the first compound.

Abstract: Provided are an organic electroluminescent device and a display device. The organic layer of the organic electroluminescent device includes a metal complex having a specific structure (including a ligand La having a structure of Formula 1), a fluorescent emissive material having a structure represented by Formula 1-1, and a specific small-molecule first host compound having a triplet energy level higher than the triplet energy level of the metal complex. The new organic electroluminescent device can further achieve significant improvements in device power efficiency and/or lifetime while maintaining a relatively low drive voltage and a relatively narrow full width at half maximum and has excellent overall performance. Further provided is a display device including the organic electroluminescent device.

Abstract: Provided are an organic electroluminescent device and a display apparatus. The organic electroluminescent device includes an anode, a cathode, and an emissive layer disposed between the anode and the cathode, wherein the emissive layer includes a fluorescent emissive material represented by the structure of Formula 1, a metal complex, a first host compound, and a second host compound. The organic electroluminescent device of the present disclosure exhibits excellent overall device performance and can achieve, for example, a narrow full width at half maximum, high current efficiency, and very excellent device lifetime. Further provided are a display apparatus including the organic electroluminescent device and a composition including the fluorescent emissive material, the metal complex, the first host compound, and the second host compound.

Abstract: Provided are a composition, a device, and a preparation method. The composition includes a premix and a phosphorescent sensitizer, and the premix includes a first host compound, a second host compound, and a fluorescent compound. The first host compound has an evaporation temperature T1, and the second host compound has an evaporation temperature T2. Both T1 and T2 range from 100° C. to 400° C., and the absolute value therebetween is less than or equal to 20° C. The premix of the present disclosure can be used as a single evaporation source in the preparation process of a device, thereby reducing the cost and complexity of the evaporation process. Moreover, the premix included in the composition of the present disclosure shows high evaporation stability and can obtain stable and more excellent device performance when the premix is applied to continuous evaporation of an organic electroluminescent device.

Abstract: A metal complex with fluorine substitution is disclosed, which employs a series of new ligands containing fluorine-substituted structure can be used as a luminescent material in an emissive layer of an electroluminescent device. By using the metal complex can provide much longer device lifetime, better thermal stability, no blue-shifted illumination, and higher luminous efficiency. An electroluminescent device and compound formulation are also disclosed.

Abstract: Provided are an organic electroluminescent material and device. The organic electroluminescent material is a compound having a structure of Formula 1. The compound has bluer and more saturated luminescence. These novel compounds may be used as light-emitting materials in organic electroluminescent devices and can provide better device performance such as higher current efficiency. Further provided are an organic electroluminescent device and compound composition comprising the compound having the structure of Formula 1.

Abstract: A metal complex with fluorine substitution is disclosed, which employs a series of new ligands containing fluorine-substituted structure can be used as a luminescent material in an emissive layer of an electroluminescent device. By using the metal complex can provide much longer device lifetime, better thermal stability, no blue-shifted illumination, and higher luminous efficiency. An electroluminescent device and compound formulation are also disclosed.

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 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 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: An organic light-emitting material containing cyano-substituted ligand is disclosed. The organic light-emitting material is a metal complex containing a cyano-substituted ligand, which can be used as a light-emitting material in a light-emitting layer of an organic electroluminescent device. These new complexes can provide better device performance, e.g., narrower full width at half maximum, lower voltage values, and higher quantum efficiency, and the like. An electroluminescent device and a compound formulation containing the metal complex, and a compound capable of being used to prepare the metal complex are also disclosed.

Abstract: An organic light-emitting material containing cyano-substituted ligand is disclosed. The organic light-emitting material is a metal complex containing a cyano-substituted ligand, which can be used as a light-emitting material in a light-emitting layer of an organic electroluminescent device. These new complexes can provide better device performance, e.g., narrower full width at half maximum, lower voltage values, and higher quantum efficiency, and the like. An electroluminescent device and a compound formulation containing the metal complex, and a compound capable of being used to prepare the metal complex are also disclosed.

Abstract: Provided are an organic electroluminescent material and device. The organic electroluminescent material is a series of metal complexes each comprising a ligand La having a structure of Formula 1, wherein the ligand La has an aza six-membered ring-(6-5-6)-fused ring skeleton structure, and has a fluorine substitution at a particular position of the aza six-membered ring, and has a particular Ar substitution and a fluorine or cyano substitution in the (6-5-6)-fused ring structure. The metal complexes may be used as light-emitting materials in electroluminescent devices. These novel compounds may be applied to electroluminescent devices and can improve the luminescence performance, driving voltages and efficiency (CE, PE and EQE) of the devices, exhibit more saturated luminescence and significantly improve the overall performance of the devices. Further provided are an organic electroluminescent device comprising the metal complex and a compound combination comprising the metal complex.

Abstract: Provided are an organic electroluminescent material and device thereof. The organic electroluminescent material is a metal complex comprising a ligand La having a structure of Formula 1. These novel metal complexes are applied in organic electroluminescent devices, and are capable of providing better device performance such as improved device efficiency and an improved device lifetime, especially a greatly improved device lifetime, and can significantly improve the overall device performance. Further provided are an organic electroluminescent device comprising the metal complex and a compound composition comprising the metal complex.

Abstract: Provided are an organic electroluminescent material and device. The organic electroluminescent material is a metal complex comprising a ligand La having a structure of Formula 1. When applied to organic electroluminescent devices, these metal complexes can provide very good device performance, especially an extended device lifetime and improved device efficiency and have a huge application prospect in aspects of white and low blue light sources. Further provided are an organic electroluminescent device comprising the metal complex and a compound composition comprising the metal complex.

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. These new compounds, when applied to an electroluminescent device, can obtain very excellent device performance, such as a reduced device voltage and improved current efficiency, power efficiency and external quantum efficiency. These new compounds can comprehensively improve the device performance in various aspects and finally significantly improves overall device performance. Further provided are an organic electroluminescent device comprising the metal complex and a composition comprising the metal complex.