Abstract: The present invention discloses an organic compound and an organic electroluminescence device employing the organic compound as the fluorescent host material in the light emitting layer of the organic electroluminescence device. The organic electroluminescence device employing the organic compound of the present invention can operate under reduced driving voltage, increase current efficiency, and prolong half-life time.

Abstract: A heteroaromatic compound which can be used as the fluorescent guest material in the light emitting layer of the organic electroluminescence device is disclosed. The organic electroluminescence device employing the heteroaromatic compound of the present invention shows lower power consumption, higher efficiency, and longer half-life time than the existed organic electroluminescence devices.

Abstract: The present invention provides compound of formula (I) wherein each substituent is defined in the specification. The compound may be used, in combination with other organic light-emitting materials, in a light-emitting layer of an organic light-emitting element. The present invention also provides an organic light-emitting element including a first electrode, a second electrode and at least three layers of organic material layers disposed between the first electrode and the second electrode, wherein the layer used as a light-emitting layer contains a compound of formula (I). Further, an all-solution process, which is used for fabricating the organic light-emitting element of the present invention, has the advantages such as avoiding miscibility among the layers to fabricate an element with a large surface area and lower production cost.

Abstract: The present invention discloses a dipyridine-based compound which can be used as electron-transporting and/or hole blocking material or phosphorous host in organic electroluminescence devices is disclosed. The mentioned dipyridine-based compound is represented by the following formula: wherein R1 and R2 are identical or different, and R1 and R2 are independently selected from the group consisting of: hydrogen atom, aryl moiety, hetero cycle, multiple fused ring, multiple fused ring with hetero atom(s); A is selected from the following group: wherein R3 and R4 are identical or different, R5 and R6 are identical or different, R7 and R8 are identical or different, R3, R4, R7, R8 are independently selected from the group consisting of: alkyl moiety and aryl moiety, and R5, R6 are independently selected from the group consisting of: alkyl moiety, aryl moiety and arylamine moiety.