The present specification relates to a heterocyclic compound represented by Chemical Formula 1, and an organic light emitting device comprising the same.

Provided is an organic light-emitting device including: an anode; a cathode provided to face the anode; a light-emitting layer provided between the anode and the cathode; a first organic material layer provided between the anode and the light-emitting layer; and a second organic material layer provided between the cathode and the light emitting layer in which each organic material, from among organic materials included in the light-emitting layer and the organic material layers, the band gap energy (E.sub.bg) of each of the organic materials except for a dopant compound is 3 eV or more, the first organic material layer comprises one or more compounds each composed of centrally sp3 carbon, the second organic material layer includes one or more compounds each composed of centrally sp3 carbon, and the first organic material layer and the second organic material layer include three or more compounds each composed of centrally sp3 carbon.

A display device includes a first pixel electrode, a second pixel electrode spaced apart from the first pixel electrode in a first direction, a first common layer on each of the first and second pixel electrodes, a second common layer on the first common layer, a first light-emitting layer on the first pixel electrode via the first and the second common layers, a second light-emitting layer on the second pixel electrode via the first and the second common layers, and a counter electrode on the first and second light-emitting layers, wherein the first common layer has a first region overlapping the first pixel electrode, a second region between the first and second pixel electrodes, and a third region overlapping the second pixel electrode, the second region is separated from each of the first and third regions, and the second common layer continuously covers the first, second, and third regions.

A light emitting element includes a pair of electrodes and first and second organic layers between the pair of electrodes. The second organic layer is adjacent to the first organic layer. The first organic layer includes a first organic material. The second organic layer includes a second organic material. The second organic layer includes a first region and a second region. The first region is in contact with the first organic layer and includes the first organic material.

An organic semiconductor device with low driving voltage is provided. The light-emitting device includes an anode, a cathode, and an EL layer between the anode and the cathode. The EL layer includes a hole-transport layer and alight-emitting layer. The hole-transport layer is positioned between the anode and the light-emitting layer. The hole-transport layer is not in contact with the anode. The hole-transport layer includes a transport layer material for a light-emitting device and the GSP_slope that is a potential gradient of a surface potential of an evaporated film of the material is higher than or equal to 20 (mV/nm).

An organic light-emitting device includes: an anode, an emitting layer, and a cathode that are stacked; a first functional material layer located between the emitting layer and the anode; and a second functional material layer located between the emitting layer and the cathode. Under a same test condition, a hole mobility of a material of the first functional material layer is at least ten times an electron mobility of a material of the second functional material layer.

The present specification relates to a heterocyclic compound represented by Chemical Formula 1, and an organic light emitting device comprising the same.

The present application relates to materials for use in electronic devices, to processes for preparing the materials, and to electronic devices containing the materials.

A light-emitting device includes: a first electrode; a second electrode facing the first electrode; an interlayer arranged between the first electrode and the second electrode and including an emission layer; and a hole transport region arranged between the first electrode and the emission layer, wherein the hole transport region includes an electron blocking layer, and the electron blocking layer includes a heterocyclic compound represented by Formula 1.

A light emitting device and a light emitting display device that are capable of improving efficiency, driving voltage, and lifespan by varying the configuration of a layer adjacent to a blue light emitting layer in a blue fluorescent stack contacting a cathode are disclosed. The light emitting device includes stacks between an anode and a cathode, wherein an n.sup.th stack contacting the cathode is a first blue stack that includes a first hole transport layer, a first electron-blocking layer, a first blue light emitting layer containing a boron-based dopant having an emission peak of 430 nm to 480 nm, a first electron transport layer contacting the first blue light emitting layer, and an electron injection layer having two sides contacting the first electron transport layer and the cathode, respectively, wherein the first electron transport layer contains a mixture of a first material and a second material.