The present invention provides compounds as PPAR agonists and their application, involving a new class of peroxisome proliferator-activated receptor (PPAR) gamma receptor agonist, which can inhibit the production of mitochondrial reactive oxygen species, and most of which can readily cross the blood-brain barrier. The present invention also includes pharmaceutical uses of the compounds.

The present specification relates to a spiro structure compound and an organic light emitting device including the same.

The present specification relates to a spiro structure compound and an organic light emitting device including the same.

The present invention relate to a novel organic compound and an organic electroluminescent device including the same, and in particular, to a novel dibenzofuran-based compound having excellent thermal stability, carrier transport ability, light emitting ability and the like, and an organic electroluminescent device having low driving voltage, and enhanced luminous efficiency, lifetime properties and the like by including the novel dibenzofuran-based compound as a material of one or more organic material layers.

The present invention discloses an organic compound and an organic electroluminescence device using the organic compound as a host material, a fluorescent guest material, an electron transporting or a hole blocking material in the light emitting layer of the organic electroluminescence device. The organic compound may be for lowering a driving voltage, power consumption or increasing a current efficiency or half-life of the organic electroluminescence device.

##STR00001##

The same definition as described in the present invention.

The present invention discloses an organic compound and an organic electroluminescence device using the organic compound as a host material, a fluorescent guest material, an electron transporting or a hole blocking material in the light emitting layer of the organic electroluminescence device. The organic compound may be for lowering a driving voltage, power consumption or increasing a current efficiency or half-life of the organic electroluminescence device.

##STR00001##

The same definition as described in the present invention.

The present invention relates to novel light-emitting materials. These materials comprise a side chain that includes a fully deuterated or partially deuterated alkyl chain. This new side chain could improve device lifetime compared to nondeuterated side chains.

The present invention relates to novel light-emitting materials. These materials comprise a side chain that includes a fully deuterated or partially deuterated alkyl chain. This new side chain could improve device lifetime compared to nondeuterated side chains.

An object of the invention is to provide a photoelectric conversion element exhibiting an excellent production suitability.

Also, the other object of the invention is to provide an optical sensor and an imaging element comprising the photoelectric conversion element.

The photoelectric conversion element of the invention includes a conductive film, a photoelectric conversion film, and a transparent conductive film, in this order, in which the photoelectric conversion film contains a compound represented by Formula (1) below.

##STR00001##

An organic compound represented by Chemical Formula 1, an organic optoelectric device including the organic compound, and a display device including the organic optoelectric device are disclosed.