Provided is a display substrate including a base substrate, an anode layer, a light-emitting layer, an electron diffusion layer, a hole block layer and a cathode layer which are sequentially stacked along a direction away from the base substrate, wherein a material of the electron diffusion layer comprises a first luminescent material, and a transport speed of holes generated by the anode layer in the electron diffusion layer is less than a transport speed of the holes in the light-emitting layer.

A compound of the following Formula I ##STR00001##
is provided. In Formula I, A is C, B, Si, Ge, or Sn; each of X.sup.1 to X.sup.22 is independently C or N; Z.sup.1 and Z.sup.2 are each independently B or N; when A is B, one of X.sup.4, X.sup.5, X.sup.12, and X.sup.22 is N, and the remainder are C; when A is C, at least one of Z.sup.1 and Z.sup.2 is B; each of Y.sup.1, Y.sup.2, Y.sup.3, and Y.sup.4 is independently O, S, Se, NR, CRR, SiRR, GeRR, and SnRR; one of both of Y.sup.1 and Y.sup.2 are present; one of both of Y.sup.3 and Y.sup.4 are present; each R, R, R.sup.A, R.sup.B, R.sup.C, R.sup.D, R.sup.E, and R.sup.F is independently hydrogen or a variety of substituents; and any two adjacent R, R, R.sup.A, R.sup.B, R.sup.C, R.sup.D, R.sup.E, and R.sup.F can be joined or fused to form a ring. Devices, consumer products, and formulations including the compound are also disclosed.

A dibenzoborole-based compound and an organic light-emitting device including the same. The dibenzoborole-based compound is represented by the formula A.sub.1-(A.sub.2).sub.n1, wherein A.sub.1 may be selected from specific aromatic and non-aromatic carbocycles and heterocycles, n1 may be an integer selected from 1 to 10, and each A.sub.2 moiety may independently be selected from a group represented by Formula 2:

##STR00001##

The dibenzoborole-based compound may be included in the hole transport region or hole transport layer. When the dibenzoborole-based compound has strong electron acceptor characteristics, the hole injection barrier between the anode and the organic layer may be reduced, and thus, an organic light-emitting device including the dibenzoborole-based compound may have high efficiency and a long lifespan.

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.

An organic electroluminescent device (OLED) comprising an anode; a cathode; and an emissive layer, disposed between the anode and the cathode is provided. The emissive layer comprises a phosphorescent dopant, a first host, and a second host, where the first host is a hole transporting host, the second host is an electron transporting host, the first host has a HOMO energy5.45 eV and/or the first host comprises a structure of Formula V:

##STR00001##

and the phosphorescent dopant has a formula Ir(L.sub.A).sub.x(L.sub.B).sub.y(L.sub.C).sub.z. In formula Ir(L.sub.A).sub.x(L.sub.B).sub.y(L.sub.C).sub.z, ligand L.sub.A has a structure of Formula I,

##STR00002##

where: moiety A is a ring; moiety B is a fused ring structure comprising at least three rings; K is a direct bond or a linker; Z.sup.1 and Z.sup.2 are C or N; each R.sup.A and R.sup.B is hydrogen or a General Substituent defined herein. Consumer products containing the OLED are also provided.

A compound comprising a metal tetradentate coordination configuration of Formula I,

##STR00001##

with a tetradentate ligand is provided. In the compound, M is Pt or Pd; Z.sup.11, Z.sup.12, Z.sup.13, and Z.sup.14 are the four coordinating atoms of the tetradentate ligand; the compound comprises a first ring system consisting of all atoms of all metal-containing rings formed by the metal M and the tetradentate ligand; atoms M, Z.sup.11, Z.sup.12, Z.sup.13, and Z.sup.14 define a first plane that passes through the metal M and is positioned to have a minimum sum of shortest distances with Z.sup.11, Z.sup.12, Z.sup.13, and Z.sup.14; wherein a total distance between the atom of the first ring system farthest away from the first plane on each side of the first plane (h1+h2) is at least 6.1 . Formulations, OLEDs, and consumer products containing the compound are also provided.

The present specification relates to a composition for an organic material layer of an organic light emitting device and an organic light emitting device including the same.

Provided are organometallic compounds comprising an Ir as the central metal atom which is coordinated by three ligands L.sub.A, L.sub.B, and L.sub.C, wherein ligands L.sub.A and L.sub.B comprise at least two rings. Also provided are formulations comprising these organometallic compounds. Further provided are organic light emitting devices (OLEDs) and related consumer products that utilize these organometallic compounds.

A compound of the following Formula I

##STR00001##

is provided. In Formula I, A is C, B, Si, Ge, or Sn; each of X.sup.1 to X.sup.22 is independently C or N; Z.sup.1 and Z.sup.2 are each independently B or N; when A is B, one of X.sup.4, X.sup.5, X.sup.12, and X.sup.22 is N, and the remainder are C; when A is C, at least one of Z.sup.1 and Z.sup.2 is B; each of Y.sup.1, Y.sup.2, Y.sup.3, and Y.sup.4 is independently O, S, Se, NR, CRR, SiRR, GeRR, and SnRR; one of both of Y.sup.1 and Y.sup.2 are present; one of both of Y.sup.3 and Y.sup.4 are present; each R, R, R.sup.A, R.sup.B, R.sup.C, R.sup.D, R.sup.E, and R.sup.F is independently hydrogen or a variety of substituents; and any two adjacent R, R, R.sup.A, R.sup.B, R.sup.C, R.sup.D, R.sup.E, and R.sup.F can be joined or fused to form a ring. Devices, consumer products, and formulations including the compound are also disclosed.

The present disclosure relates to an organic electroluminescent device. The organic electroluminescent device according to the present disclosure can have overall device stability by comprising a deuterated compound in the electron transport zone.