Abstract: A compound comprising a first ligand LA of Formula I, is provided. In Formula I, moiety A and moiety B either a monocyclic ring or a polycyclic fused ring system; each of X1 to X4, Z1, and Z2 is C or N; K1 is a direct bond, O, S, N(R?), P(R?), B(R?), C(R?)(R?), or Si(R?)(R?); L1 is a direct bond or a linking group; each R?, R?, RA and RB is hydrogen or a General Substituent; and LA is coordinated to a metal M. In addition, RA or RB alone or in combination with a substituent of L1 form a 7-membered ring. Formulations, OLEDs, and consumer products containing the compound are also provided.

Abstract: Provided are organometallic compounds comprising iridium as a central metal atom which is coordinated by two three-dentate ligands which each comprise at least three 5-membered or 6-membered 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.

Abstract: A composition of materials including a first compound having a structure according to Formula I

Abstract: Provided are organic compounds including a structure wherein two 6-membered aromatic rings are connected with a direct bond and further linked by a linker selected from the group consisting of O, S, Se; NR, BR, BRR?, PR, CR, C?O, C?NR, C?CRR?, C?S, CRR?, SO, SO2, P(O)R, SiRR?, and GeRR? so to form a 5-membered ring including the linker. Also provided are formulations comprising these organic compounds. Further provided are organic light emitting devices (OLEDs) and related consumer products that utilize these organic compounds.

Abstract: Provided is a compound of Formula Ir(LA)(LB)(LC), wherein LA is a ligand of LB is a ligand of and LC is a ligand of wherein a structure of is fused to the ligand LB of Formula II through two adjacent C of X1-X4.

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: Provided are neutral Pt or Pd organometallic compounds comprising a tetradentate ligand, wherein the organometallic compound comprises at least one Pt—C or Pd—C bond. Also provided are formulations comprising these organometallic compounds. Further provided are organic light emitting devices (OLEDs) as well as 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, 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 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: 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: 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: Compounds containing indolocarbazole and terphenyl building blocks are disclosed in this application. These compounds are useful for application in organic electroluminescent devices.

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: Provided are compounds comprising first ligands LA being hetero-benzofused ligands of Pt and Ir complexes for OLED applications. Also provided are formulations comprising these compounds comprising first ligands LA being hetero-benzofused ligands of Pt and Ir complexes for OLED applications. Further provided are OLEDs and related consumer products that utilize these compounds comprising first ligands LA being hetero-benzofused ligands of Pt and Ir complexes for OLED applications.

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.