A light emitting element according to an embodiment includes a first electrode, a second electrode disposed on the first electrode, and an emission layer disposed between the first electrode and the second electrode. The emission layer comprises a first compound, a second compound, and a third compound, which are different from each other, and the first compound is a polycyclic compound represented by Formula 1, thereby achieving a light emitting element having high emission efficiency.

##STR00001##

A light emitting element according to an embodiment includes a first electrode, a second electrode disposed on the first electrode, and an emission layer disposed between the first electrode and the second electrode. The emission layer comprises a first compound, a second compound, and a third compound, which are different from each other, and the first compound is a polycyclic compound represented by Formula 1, thereby achieving a light emitting element having high emission efficiency.

##STR00001##

A light-emitting device in which an interlayer includes a contact layer including an electron-transporting host and a hole-transporting host is provided. The contact layer is in direct contact with an emission layer, and the emission layer includes a first dopant and a second dopant.

A compound for an organic optoelectronic device, a composition for an organic optoelectronic device including the same, an organic optoelectronic device, and a display device, the compound being represented by Chemical Formula 1:

##STR00001##

To provide a composition having a very low refractive index, an organic photoelectronic element using the composition, and simple methods for producing such a composition and an organic photoelectronic element. A composition comprising a fluorinated polymer, an organic semiconductor material and a dopant.

Embodiments of the present invention relate to an organic electronic device capable of ensuring high luminous efficiency, low driving voltage and high heat resistance, and improving color purity or lifespan.

Organic electroluminescent materials and devices are disclosed. The organic electroluminescent materials are novel benzodithiophene or its analogous structure compounds, which can be used as charge transporting materials, hole injection materials, or the like in an electroluminescent device. These novel compounds can offer excellent performance compared with existing materials, for example, to further improve the voltage, efficiency and/or lifetime of the OLEDs.

A light-emitting element includes an anode electrode and a cathode electrode, and is provided with a first hole transport layer, a second hole transport layer, a light-emitting layer, a first electron transport layer, and a second electron transport layer. At a HOMO level, an energy level difference between the second hole transport layer and the light-emitting layer on the second hole transport layer side is from 0.0 eV to 0.15 eV, and at a LUMO level, an energy level difference between the first electron transport layer and the light-emitting layer on the first electron transport layer side is from 0.0 eV to 0.15 eV. The second electron transport layer is a mixed layer that includes an organic material having electron transport properties and an electron-accepting material and contains the electron-accepting material in an amount greater than 50 mass %.

An electroluminescent display device is disclosed. The electroluminescent display device includes a substrate having thereon a first sub pixel and a second sub pixel, a first electrode in each of the first sub pixel and the second sub pixel on the substrate, an organic layer with P-type polarity or N-type polarity on the first electrode, and a second electrode on the organic layer. The organic layer provided in the first sub pixel and the organic layer provided in the second sub pixel are spaced apart from each other with a doping layer provided in the boundary area between the first sub pixel and the second sub pixel. The doping layer is doped with dopant whose polarity is opposite to that of the organic layer.

An electroluminescent display device is disclosed. The electroluminescent display device includes a substrate having thereon a first sub pixel and a second sub pixel, a first electrode in each of the first sub pixel and the second sub pixel on the substrate, an organic layer with P-type polarity or N-type polarity on the first electrode, and a second electrode on the organic layer. The organic layer provided in the first sub pixel and the organic layer provided in the second sub pixel are spaced apart from each other with a doping layer provided in the boundary area between the first sub pixel and the second sub pixel. The doping layer is doped with dopant whose polarity is opposite to that of the organic layer.