Abstract: Disclosed is a compound including a ligand LA of Formula I where each of moiety A and moiety B is independently a monocyclic or polycyclic ring structure including 5-membered and/or 6-membered carbocyclic or heterocyclic rings; where moiety B includes a structure of Formula II These compounds are useful as a component in the emissive layer of OLEDs.

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, or S; 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: A heteroleptic compound of formula Ir(LA)m(LB)n, where LA has a structure of Formula I, and LB has Formula II, is provided. 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: 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: A composition of materials including a first compound having a structure according to Formula I

Abstract: A compound comprising a first ligand LA of Formula I, is provided. In Formula I, moiety A is a heterocyclic fused ring system comprising a 5-membered ring fused to a 6-membered ring; moiety B is an aromatic ring or fused ring system; each RA and RB is independently a hydrogen or a General Substituent; K is a direct bond, O, or S; at least one of RA and RB comprises a substituent R comprising a silyl group or a germyl group; ligand LA is coordinated to a metal M, which has an atomic mass of at least 40; and metal M may be coordinated to other ligands Formulations, OLEDs, and consumer products containing the same are also provided.

Abstract: A compound including a first ligand LA of Formula I, is provided. In Formula I, each of moiety A and moiety B independently represents monocyclic or polycyclic rings; one of Z1 and Z2 is C and the other is N; K is a direct bond, O, or S; at least one RA or RB has a structure of Formula II, where at least two of X1 to X4 are C; L is a direct bond or an organic linker; each R, R?, R?, RA, RB, and RC is a hydrogen or a General Substituent; and LA is coordinated to a metal M. Formulations, OLEDs, and consumer products containing the compound are also provided.

Abstract: A compound having a formula (LA)mIr(LB)3?m having a structure selected from is disclosed. In the structures of formula (LA)mIr(LB)3-m, m is 1 or 2, R1, R2, R3, R4, and R5 are each independently selected from hydrogen, deuterium, C1 to C6 alkyl, C1 to C6 cycloalkyl, and partially or fully deuterated variants thereof, and partially or fully fluorinated variants thereof, and, R6 is selected from C1 to C6 alkyl, C1 to C6 cycloalkyl, and partially or fully deuterated variants thereof, and partially or fully fluorinated variants thereof.

Abstract: Iridium complexes comprising three different bidentate ligands and their use in OLEDs to enhance the device efficiency and lifetime are disclosed. The complexes have a structure of the formula Ir(LA)(LB)(LC), where ligand LA is selected from a variety of structures, ligand LB has the structure and LC has the structure In these structures rings A, B, C, and D are each independently a 5 or 6-membered carbocyclic or heterocyclic ring; R1, R2, R3, RA, RB, RC, and RD can be any of a variety of substituents, and Z1 and Z2 are each independently C or N.

Abstract: A composition including a first compound capable of functioning as a phosphorescent emitter in an OLED is provided. The first compound has at least one aromatic ring and at least one substituent R directly bonded to one of the at least one aromatic rings. Each substituent R has the formula of where (a) G1 is selected from NR1, SiR1R2, GeR1R2, alkyl, cycloalkyl, and combinations thereof; and G2 is a non-aromatic polycyclic group; (b) G1 is a direct bond; and G2 is a non-aromatic spiro polycyclic group; or (c) G1 is selected from direct bond, NR1, SiR1R2, GeR1R2, alkyl, cycloalkyl, and combinations thereof; G2 is a non-aromatic polycyclic group; and R is directly bonded to a phenyl, pyridine, or triazine. R1, R2, and R3 are a variety of substituents. Formulations and devices, such as an OLEDs, that include the first compound are also described.

Abstract: A compound comprising a ligand of LA of Formula I, is provided with variables as defined herein. Formulations, OLEDs, and consumer products including the compound are also disclosed.

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: A novel compound having a first ligand LA of is disclosed. The compound is useful as emitter dopant in OLEDs.

Abstract: A compound comprising a ligand LA, having a structure of Formula I, is provided. In Formula I, A1 to A8 are each independently CR or N; at least two adjacent ones of A1 to A8 are CR and the Rs are joined together to form a six-membered ring fused to ring A or ring C; X is O, S, or Se; each R and RB is independently hydrogen or a substituent; any adjacent substituents are optionally joined or fused into a ring; the ligand LA is coordinated to a metal M; the metal M is bonded to ring A through a M-C bond; the metal M can be coordinated to other ligands; and the ligand LA is optionally linked with other ligands. Formulations, OLEDs, and consumer products containing such compounds are also disclosed.

Abstract: Provided is a compound including a first ligand LA of Formula I, In Formula I, moiety A is a monocyclic ring or a multicyclic fused ring system; one of X1, X2, and X3 is C and is connected to X4; one of X1, X2, and X3 is N and is coordinated to a metal M; and the remaining one of X1, X2, and X3 is CR or N; X4 is C or N; Y is a divalent linking group; each R, R?, RA, and RB is independently hydrogen or a General Substituent; each of K1 and K2 is independently direct bond, O, or S; and metal M is selected from the group consisting of Os, Ir, Pd, Pt, Cu, Ag, and Au. Formulations, OLEDs, and consumer products including the same are also provided.

Abstract: A compound including a first ligand LA of Formula I, is disclosed. In Formula I, ring B is a 5- or 6-membered ring; X1, X2, and X3 are each CRA or N; R is a 5- or 6-membered carbocyclic or heterocyclic ring, which can be further fused or substituted; and (1) when ring B is an unfused 6-membered ring, X1 and X2 are N, and X3 is C; and (2) when ring B is a fused 6-membered ring, ring B has the structure of Formula II, In this structure, the wavy line indicates the point of connection to ring A; Q1 to Q6 are each C or N; and, when proviso (2) applies, (I) at least one of X1, X2, and X3 is N; or (II) R is two or more fused or unfused 5- or 6-membered carbocyclic or heterocyclic rings, or (III) at least ring A or R is substituted with a partially or fully deuterated alkyl or partially or fully deuterated cycloalkyl group.

Abstract: A compound including a first ligand LA of Formula I, is described. In Formula I, each of X1 to X9 is independently C or N; one of Z1 and Z2 is C and the other is N; each of K1 and K2 is independently a direct bond, O, or S; at least one of K1 and K2 is a direct bond; at least one RB is not hydrogen; R3 is selected from alkyl, heteroalkyl, cycloalkyl, and heterocycloalkyl; LA is coordinated to a metal M; at least one of the following is true: (i) at least one RB comprises a 5- or 6-membered, (ii) two adjacent RB are joined to form a fused 5- or 6-membered ring, or (iii) RB comprises a carbocyclic or heterocyclic ring substituted with at least one electron withdrawing group. Devices, consumer products, and formulations including the compound are also described.

Abstract: A compound having the formula: Formula I is disclosed. The compound is useful as emitters in OLEDs.

Abstract: Compounds containing indolocarbazole compounds of Formula I or Formula II comprising terphenyl groups and compounds of Formula III comprising triazine groups are disclosed in this application. These compounds are useful for application in organic electroluminescent devices.

Abstract: Iridium complexes comprising three different bidentate ligands and their use in OLEDs to enhance the device efficiency and lifetime are disclosed. The complexes have a structure of the formula Ir(LA)(LB)(LC), where ligand LA is selected from a variety of structures, ligand LB has the structure and LC has the structure In these structures, rings A, B, C, and D are each independently a 5 or 6-membered carbocyclic or heterocyclic ring; R1, R2, R3, RA, RB, RC, and RD can be any of a variety of substituents, and Z1 and Z2 are each independently C or N.