Abstract: A compound is disclosed that has a metal coordination complex structure having at least two ligands coordinated to the metal; wherein the compound has a first substituent R1 at one of the ligands' periphery; wherein a first distance is defined as the distance between the metal and one of the atoms in R1 where that atom is the farthest away from the metal among the atoms in R1; wherein the first distance is also longer than any other atom-to-metal distance between the metal and any other atoms in the compound; and wherein when a sphere having a radius r is defined whose center is at the metal and the radius r is the smallest radius that will allow the sphere to enclose all atoms in the compound that are not part of R1, the first distance is longer than the radius r by at least 2.9 ?.

Abstract: Novel Pt tetradentate complexes having Pt—O bond is disclosed. These complexes are useful as emitters in phosphorescent OLEDs.

Abstract: A compound comprising a bidentate ligand LA, comprising a moiety W is disclosed. W is a cyclic structure including three or more aromatic moieties joined to each other by direct bonds, wherein W can be substituted. Ligand LA is coordinated to a metal M, and can be joined with other ligands to form a tridentate, tetradentate, pentadentate, or hexadentate ligand. The compound does not form part of an interlocked compound. Formulations, OLEDs, and consumer products containing the compound are also provided.

Abstract: Provided are organometallic compounds comprising a first ligand LA which may be a bidentate, tridentate, tetradentate, pentadentate, or hexadentate ligand and which forms at least one 5-membered ring with a metal atom. 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.

Abstract: Provided are organometallic compounds comprising a platinum atom as the central atom which is complexed by a tetradentate ligand comprising at least three rings as well as a at least one bicyclic moiety comprising at least one nitrogen atom. 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.

Abstract: A compound comprising a first ligand LA of Formula I, is provided. In Formula I, moiety A is a 5-membered or 6-membered ring; moiety B is a fused ring structure comprising at least four rings; K is a direct bond, O, or S; each of Z1 and Z2 is independently C or N; each RA and RB is independently hydrogen or a General Substituent; at least one RB comprises a cyclic group or an electron-withdrawing group; LA is coordinated to a metal M that has an atomic mass of at least 40 and is optionally coordinated to other ligands; and the ligand LA is optionally linked with other ligands. Formulations, OLEDs, and consumer products including the compound are also provided.

Abstract: A compound comprising a first ligand LA of Formula I, is provided. In Formula I, K is a direct bond, O, S, N(R?), P(R?), B(R?), C(R?)(R?), or Si(R?)(R?); each of X1 to X8 is C or N; Y is a linking group; each R?, R?, R, R?, R?, R1, RA, RB, and RC is hydrogen or a General Substituent; at least one RC is R*; R* has a structure of Cy-R**, where Cy is a monocyclic ring or a polycyclic fused ring system, which can be further substituted, and R** comprises (i) at least one electron-withdrawing group, (ii) a monocyclic ring or a polycyclic fused ring system, where the monocyclic ring and each ring of the polycyclic fused ring system is independently a 5-membered or 6-membered carbocyclic or heterocyclic ring, or (iii) both (i) and (ii); and LA is coordinated to a metal. Formulations, OLEDs, and consumer products containing the compound are also provided.

Abstract: A compound capable of functioning as a phosphorescent emitter in an organic light emitting device at room temperature that includes at least one aromatic ring and at least one substituent R where each of the at least one R is of Formula I

Abstract: A compound comprising a first ligand LA of Formula I, is provided. In Formula I, rings A and B are 5- or 6-membered ring; K1 and K2 are each independently selected from the group consisting of a direct bond, O, S, N(R?), P(R?), B(R?), C(R?)(R?), and Si(R?)(R?); Z1, Z2, X1 and X2 are C or N; Y1*, Y2*, Y1*, Y4*, and Y5* are selected from a variety of moieties; n is 0 or 1; Y5* is bonded directly to X2 when n is 0; each Ra, R?, R, R?, R1, R2, RA, and RB is hydrogen or a substituent; each independently represents a single bond or double bond in a Lewis structure; and LA is coordinated to a metal M, which may be coordinated to other ligands Formulations, OLEDs, and consumer products containing the compound are also provided.

Abstract: A compound including a first ligand LA selected from the following group: is disclosed.

Abstract: A compound having a formula of M(LA)p(LB)q(LC)r, where LA has a structure of Formula I, LB is a bidentate ligand; and LC has a structure of Formula II, is provided. In Formula I and Formula II, the compound can be homoleptic or heteroleptic and can include up to three different ligands; K3 and K4 are each independently a direct bond, O, S, N(R?), P(R?), B(R?), C(R?)(R?), or Si(R?)(R?); each of moiety A and moiety B represents a monocyclic ring or a polycyclic, fused-ring structure; each of Z1 and Z2 is C or N; and at least one of RA, RB, RC1, RC2, or RC3 comprises a structure of Formula III, In Formula III, L is bivalent organic linker, and Z is Si or Ge. Each RA, RB, RC1, RC2, and RC3 is independently hydrogen or a General Substituent, and each of R1, R2, and R3 is a General Substituent. Formulations, OLEDs, and consumer products including such compounds are also provided.

Abstract: New organometallic complexes having bis- or tris-heteroleptic ligands and large aspect ratio in one direction and their use in OLEDs to enhance the efficiency is disclosed.

Abstract: Novel metal complexes incorporating boron-containing aromatic compounds useful as a phosphorescent OLED material are disclosed.

Abstract: A compound comprising a first ligand LA of Formula I, is provided. In Formula I, ring A is a 5-membered or 6-membered ring; K is a direct bond, O, or S; X1 to X8 are independently C or N; Y is a linker that forms a 5-membered ring between rings B and C; Z1 and Z2 are C or N; each R, R?, R?, RA, RB, RC, and R1 is a hydrogen or a General Substituent; LA is coordinated to a metal M by the dashed lines; and (i) at least one RC is a cyclic group that is not fused to ring C, or (ii) ring A has a structure of Formula II, and ring A is bonded to ring B at X1; or (iii) both (i) and (ii). Formulations, OLEDs, and consumer products containing the compound are also provided.

Abstract: Provided is a compound comprising a first ligand LA having a structure of Formula I, wherein the variables are defined herein. Also provided are formulations and products containing a compound comprising a structure of Formula I.

Abstract: Provided is a compound of Formula of Ir(LA)n(LB)m(LC)o, wherein ligand LA has a structure of Formula I, ligand LB has a structure of Formula II, and LC is a bidentate ligand; and wherein n is 1, or 2; m is 1, or 2; o is 0, or 1; and n+m+o=3; and all the remaining variables are defined herein. Formulations, OLEDs, and consumer products containing the compound are also provided.

Abstract: A heteroleptic compound of formula Ir(LA)m(LB)n(LC)o, where LA has a structure of Formula I, and LB has Formula II, is provided; and LC is a bidentate ligand. In Formulae I and II, moieties A and D are independently a rings or polycyclic ring systems, one of moiety A and moiety D is coordinated to Ir by a 5-membered ring, and the other is coordinated to Ir by a 6-membered ring; each of X, X1 to X12 is C or N; Y is a linking atom; each RA, RB, RC, RD, and RE is hydrogen or a general substituent; and at least one RD or RE substituent comprises an electron-withdrawing group, or an aryl or heteroaryl substituted with an electron-withdrawing group. Formulations, OLEDs, and consumer products containing the compound are also provided.

Abstract: A compound including a first ligand LA of is disclosed. In the structure of Formula I, one of L1 and L2 is C, and the other is N; Y1 to Y14 are each C or N; at least two adjacent Y7, Y8, Y9, and Y10 are carbon atoms that are fused to a structure of Z1 and Z2 are each O, S, Se, NR, CRR?, or SiRR?; and each R, R?, RA, RB, RC, and RD is hydrogen or a substituent; and any two substituents may be joined or fused together to form a ring. In the compound, LA is complexed to a metal M by L1 and L2, and M has an atomic weight greater than 40. Organic light emitting devices and consumer products containing the compounds are also disclosed.

Abstract: Provided are compounds capable of functioning as an emitter in an organic light emitting device at room temperature, and their use in OLED related electronic devices.

Abstract: A compound is disclosed that has a metal coordination complex structure having at least two ligands coordinated to the metal; wherein the compound has a first substituent R1 at one of the ligands' periphery; wherein a first distance is defined as the distance between the metal and one of the atoms in R1 where that atom is the farthest away from the metal among the atoms in R1; wherein the first distance is also longer than any other atom-to-metal distance between the metal and any other atoms in the compound; and wherein when a sphere having a radius r is defined whose center is at the metal and the radius r is the smallest radius that will allow the sphere to enclose all atoms in the compound that are not part of R1, the first distance is longer than the radius r by at least 2.9 ?.