Provided is an organic light-emitting device including: an anode; a cathode provided to face the anode; and organic material layers including a light emitting layer disposed between the anode and the cathode, wherein the light emitting layer, one or more layers of the organic material layers disposed between the anode and the light emitting layer, and one or more layers from among the organic material layers disposed between the cathode and the light emitting layer, each include one or more compounds each composed of sp3 carbon as a center, the light emitting layer includes a host including one or more anthracene-based compounds, and among organic materials included in the organic material layers, the bandgap energy (E.sub.bg) of each of the organic materials except for a dopant compound is 3 eV or more.

An organic electroluminescence device includes: an anode; a cathode; a first emitting layer; and a second emitting layer provided between the first emitting layer and the cathode, in which the first emitting layer contains, as a first host material, a first compound that has at least one group represented by a formula (11) below and that is represented by a formula (1) below, the second emitting layer contains, as a second host material, a second compound represented by one of formulae (2-1A) to (2-4A) below, and the first emitting layer and the second emitting layer are in direct contact with each other.

##STR00001## ##STR00002##

Provided are an organic light emitting device and a display apparatus. An organic light emitting device includes an anode, a cathode, and an emitting layer disposed between the anode and the cathode; wherein the emitting layer includes a host material and a dopant material doped in the host material; the host material includes a first host material and a second host material, and the first host material, the second host material, the electron block layer, and the hole block layer satisfy:

|HOMO.sub.1-host-HOMO.sub.EBL|≤0.2 eV,|LUMO.sub.HBL-LUMO.sub.2-host|≤0.2 eV, wherein, HOMO.sub.1-host is a HOMO energy level of the first host material; HOMO.sub.EBL is a HOMO energy level of the electron block layer; LUMO.sub.2-host is a LUMO energy level of the second host material, and LUMO.sub.HBL is a LUMO energy level of the hole block layer.

To provide a novel photoelectric conversion device that is highly convenient, useful, or reliable. The photoelectric conversion device includes a first electrode, a second electrode, and a first unit. The first unit is located between the first electrode and the second electrode. The first unit contains a first electron-donating material and a first electron-accepting material. The first electron-donating material is a condensed aromatic compound, and the first electron-accepting material has a perylene skeleton and two or more alkyl groups. The alkyl groups each independently have 1 to 13 carbon atoms.

Provided are novel silyl-containing acetylacetonate derivatives compounds. Also provided are formulations comprising these silyl-containing acetylacetonate derivatives compounds. Further provided are OLEDs and related consumer products that utilize these silyl-containing acetylacetonate derivatives compounds.

An organic light-emitting device includes a condensed cyclic compound represented by Formula 1, where at least one of X.sub.4 to X.sub.11 is C(R.sub.x), and R.sub.x is a group represented by Formula 2: ##STR00001## The condensed cyclic compound represented by Formula 1 has a planar conformation because of the single bond linking the 8 and 8′ positions of the spirobifluorene moiety. Accordingly, the condensed cyclic compound may provide the organic light-emitting device with suitable hole mobility and thermal stability.

The invention relates to an electronic device, to the use thereof, and to a method for the production thereof.

The present application relates to an electronic device, to the use thereof, and to a process for production thereof.

An organic electroluminescence device includes a first electrode, a hole transport region on the first electrode, an emission layer on the hole transport region, an electron transport region on the emission layer, and a second electrode on the electron transport region. The hole transport region includes a monoamine compound represented by the following Formula 1:

##STR00001##

Provided is a heterocyclic compound of Chemical Formula 1:

##STR00001## wherein: A1 is Chemical Formula 1-1:

##STR00002## Y1 and Y2 are hydrogen or deuterium, or directly bonded to each other, or linked through —C(R31)(R32)-, —Si(R33)(R34)-, —N(R35)-, —O—, or —S—; any one of R11 to R26 is linked to L1, and of the remaining, one is linked to L4 of Chemical Formula 1, and the others are each independently hydrogen, deuterium, a cyano group, or a substituted or unsubstituted: alkyl, aryl, or heteroaryl group; at least two of X1 to X3 are N, and the other is CH; R1 is a substituted or unsubstituted alkyl group; L1 to L4 are each independently a direct bond or a substituted or unsubstituted arylene or heteroarylene group; and Ar1 to Ar3 are each independently a substituted or unsubstituted alkyl, aryl, or heteroaryl group; and an organic light-emitting device including the same.