Abstract: A compound comprising a first ligand LA of Formula I, is provided. In Formula I, moiety A is a monocyclic ring or a polycyclic fused ring system; X and Y are independently single-atom linkers; N* is a nitrogen atom; the bond between N*—Y and the bond between X—Y are both single bonds; each of X1, X2, X3, Z1, and Z2 is C or N; each of K1 and K2 is a direct bond or a linker; each R, R?, R?, R?, RA, and RB is hydrogen or a General Substituent defined herein; LA is coordinated to a metal M having an atomic mass of at least 40. Formulations, OLEDs, and consumer products containing the compound are also provided.

Abstract: Provided are organometallic compounds including a ligand LA of the following Formula I Also provided are formulations including these organometallic compounds. Further provided are OLEDs and related consumer products that utilize these organometallic compounds.

Abstract: Provided are organometallic compounds comprising a ligand comprising at least two moieties A and B which are linked by a linking group L2, wherein the ligand is coordinated to a central metal atom M. 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 organic compounds comprising a boron atom which is part of two 6-membered rings which are fused together and to which at least three further 6-membered aromatic rings are fused. Also provided are formulations comprising these organic compounds. Further provided are organic light emitting devices (OLEDs) as well as related consumer products that utilize these organic compounds.

Abstract: A compound having a first ligand LA of Formula I, is provided. In Formula I, each of moiety A and moiety B is a monocyclic ring or a polycyclic fused ring system; each of Z1 and Z2 is C or N; K is a direct bond or a linking group; R* includes a moiety selected from an electron-withdrawing group, heteroaryl, BRR?, SiRR?R?, GeRR?R?, OR, SR, SeR, PRR?, PRR?R?, AsRR?, AsRR?R?, or a combination thereof; each R, R?, R?, R*, R?, R?, RA, and RB is a hydrogen or a General Substituent defined herein; LA is coordinated to a metal M having an atomic mass of at least 40; and any two substituents may be joined or fused to form a ring. Formulations, OLEDs, and consumer products containing the compound are also provided.

Abstract: Provided are compounds comprising a ligand LA of Formula I where the ligand LA is coordinated to Ir.

Abstract: Provided are organometallic compounds comprising two moieties A and B which are each independently a monocyclic ring or a polycyclic fused ring structure, wherein the monocyclic ring or each ring of the polycyclic fused ring structure is independently a 5-membered to 10-membered carbocyclic or heterocyclic ring which are linked by a direct bond and which are further bridged by a linker comprising two groups which are each independently 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?. 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 organic compounds comprising a central seven-membered Ge or Si atom comprising ring to which three 6-membered carbocyclic aromatic groups are fused. Also provided are formulations comprising these organic compounds. Further provided are organic light emitting devices (OLEDs) as well as related consumer products that utilize these organic compounds.

Abstract: A compound comprising a structure of Formula I, is provided. In Formula I, RW has a structure of Formula II, where at least two RE substituents are joined to form a 5- to 10-membered ring; each of X1 to X11 and Z1 to Z3 is C or N; M is Pd or Pt; each of moiety A, moiety B, moiety C, and moiety D is a ring or a polycyclic fused ring system; each of L1 and L2 is a direct bond or a linker; each substituent is hydrogen or a General Substituents defined herein; and any two substituents may be joined or fused to form a ring, Formulations, OLEDs, and consumer products containing the compound are also provided.

Abstract: Provided are macrocyclic compounds comprising at least one eight-membered ring and at least four further 5-membered or 6-membered carbocyclic and heterocyclic rings which may be further substituted. Also provided are formulations comprising these macrocyclic compounds. Further provided are organic light emitting devices (OLEDs) and related consumer products that utilize these macrocyclic compounds.

Abstract: An organic light emitting device including an anode; a hole transporting layer; an emissive region; an electron transporting layer; and a cathode is provided. The emissive region includes a first compound, H1; a second compound, H2; and a third compound, D1. The first compound is a first host, which only includes elements selected from C, Si, Ge, H, and D; the second compound is a second host or a first sensitizer; and the third compound is an emitter. Formulations, emissive regions, and premixed co-evaporation sources containing the first, second, and third compounds are also provided.

Abstract: Provided are organometallic compounds containing a gold atom as the central metal atom which is coordinated by a tetradentate ligand comprising at least four monocyclic or fused polycyclic ring system as described herein. 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 two moieties A and B which are each independently a monocyclic ring or a polycyclic fused ring structure, wherein the monocyclic ring or each ring of the polycyclic fused ring structure is independently a 5-membered to 10-membered carbocyclic or heterocyclic ring which are linked by a direct bond and which are further bridged by a linker comprising two groups which are each independently 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?. 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 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 compounds comprising a ligand LA of Formula I where the ligand LA is coordinated to Ir.

Abstract: Provided are organometallic compounds that include a ligand LA of that are useful as emitters in OLEDs. Also provided are formulations comprising these organometallic compounds. Further provided are OLEDs and related consumer products that utilize these organometallic compounds.

Abstract: Provided are compounds comprising a ligand LA of Formula I

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