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: 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 is an organic electroluminescent device. The organic electroluminescent device is a blue delayed fluorescent device including an anode, a cathode, an emissive layer disposed between the anode and the cathode and a hole blocking layer disposed between the emissive layer and the cathode, where the hole blocking layer comprises a hole blocking material having a structure of Formula 1, and the emissive layer comprises a first host material, a second host material and a blue delayed fluorescent material having a structure of Formula 3. The blue delayed fluorescent device exhibits excellent overall device performance, such as higher efficiency and longer lifetime. Further provided are a light-emitting device comprising a blue delayed fluorescent unit, a green phosphorescent unit and a red phosphorescent unit and a display assembly comprising the blue delayed fluorescent device and the light-emitting device.