Abstract: A compound comprising a first ligand LA comprising a structure of Formula I, is provided. In Formula I: moieties A and B are each a monocyclic ring or a polycyclic fused-ring system; each of Y1, Y2, Y3, and Y4 is independently a divalent, single atom long linker; each of L1 and L2 is independently a direct bond or a divalent, one atom ling linker; each RA, RB, or other substituent is hydrogen or a General Substituent defined herein; any two substituents may be joined or fused to form a ring; LA may be monodentate, bidentate, tridentate, tetradentate, pentadentate, or hexadentate; and LA is coordinated to a metal M and may be coordinated to other ligands. Formulations, OLEDs, and consumer products containing the compounds are also provided.

Abstract: A compound having a structure of Formula I, is provided. In Formula I, M is Pt or Pd; rings A, B, C, and D are 5-membered or 6-membered rings; one of Z1, Z2, and Z3 is N and the other two are C; each of X1 to X10 is C or N; K is a direct bond, O, S, N(R?), P(R?), B(R?), C(R?)(R?), or Si(R?)(R?); each of L1 and L2 is a direct bond or a linker; each R, R?, R?, R?, R?, RA, RB, RC, RD, and RE is hydrogen or a General Substituent; R1 is a substituent; at least one RE comprises a substituent selected from the group consisting of aryl, heteroaryl, cycloalkyl, and heteroalkyl; any two substituents may be joined or fused to form a ring, except that RE at X3 or X4 cannot be joined with RA to from a ring. Formulations, OLEDs, and consumer products including the compound are also provided.

Abstract: Provided are neutral Pt or Pd compounds comprising a tridentate and a monodentate ligand, wherein the tridentate ligand comprises at least three 5- or 6-membered rings. Also provided are formulations comprising these neutral Pt or Pd compounds. Further provided are organic light emitting devices (OLEDs) and related consumer products that utilize these neutral Pt or Pd compounds.

Abstract: Provided are compounds comprising a Si or Ge atom to which three monocyclic or fused polycyclic ring systems comprised of one or more 5-membered or 6-membered rings as well as one selected from the group consisting of B, BR, Al, Ga, N, P, As, Sb, Bi, P?X?, As?X?, Sb?X?, and Bi?X? are attached. Also provided are formulations comprising these compounds. Further provided are organic light emitting diodes (OLEDs) and related consumer products that utilize these compounds.

Abstract: Disclosed is an OLED configuration that although comprises an exciplex that has an emission spectrum that is redder than the emission spectrum of the emitter, the emission from the exciplex is suppressed so that the overall OLED emission spectrum is still dominated by the emission of the emitter.

Abstract: Provided are compounds comprising a ligand which comprises at least one 7-membered or larger carbocyclic or heterocyclic ring and at least one 5-membered or 6-membered carbocyclic or heterocyclic ring. Also provided are formulations comprising these compounds. Further provided are organic light emitting devices (OLEDs) and related consumer products that utilize these compounds.

Abstract: A compound having a structure of Formula I, and a structure of Formula II, fused directly to one of moiety A, B, C, or D is provided. In Formulae I and II, each of moieties A, B, C, and D is a monocyclic ring or a polycyclic fused ring system; one of Z1, Z2, and Z3 is N and the other two are C; each of L1, L2, and L3 is a direct bond or a linker, K1 is a direct bond, O, or S; M is Pt or Pd; each of X1 to X6 is C or N; each of Q1, Q2, and Q3 is CRQ or CRQRQ?; n is 1 to 5; and each R, R?, R?, R?, RA, RB, RC, RD, RF, RQ, and RQ? is hydrogen or a General Substituent. Formulations, OLEDs, and consumer products containing the compound are also provided.

Abstract: Compounds of are provided. In these structures, M is Pt or Pd; each of X1 to X6, X9 to X12, and Z1 to Z3 is C or N; each of L1, L2, L3, and L4 is a direct bond or a linker; at least three of L1, L2, L3, and L4 are present; each K1, K2, and K3 is a bond, O, or S; when Z1 is N, ring A in Formula I is not a pyridine or pyrazole; L? is a bond or an organic linker; Y is selected from the group consisting of amino, alkoxy, aryloxy, or SiR1R2R3; when Y is SiR1R2R3, L2 is not BR. Devices, consumer products, and formulations containing these compounds are also disclosed.

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 of Formula R1R2R3M-L-M?; wherein M is Si or Ge; L is selected from the group consisting of a direct bond, or selected from the group consisting of O, S, Se, BR, BRR?, PR, CR, NR, C?O, C?S, C?NR, C?CRR?, CRR?, SO, SO2, SiRR?, GeRR?, and P(O)R; when L is a direct bond, M? is SiR4R5R6 or GeR4R5R6; and when L is not a direct bond, M? is SiR4R5R6, GeR4R5R6, or one or more hydrocarbon groups provided that at least one of the one or more hydrocarbon groups is a carbocyclic group. Also provided are formulations comprising these compounds. Further provided are organic light emitting devices (OLEDs) and related consumer products that utilize these compounds.

Abstract: Provided is a new composition of matter for phosphorescent emitters containing a chelating ligand including five or more fused carbocyclic or heterocyclic rings that form two bonds to a metal forming a 7-membered chelate. This fused ring structure provides added rigidity to the molecule for enhanced stability in an OLED device and improve photophysical properties.

Abstract: A compound comprising a first ligand LA of Formula I or Formula II: wherein A1 and A2 are each independently C or Si; wherein each RA, and RB independently represents mono to the maximum allowable substitution, or no substitution; wherein each X1, X2, and X3 is independently C or N; wherein each R, R1, R2, R3, R4 and RA is independently a hydrogen or a substituent selected from the group consisting of deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, heterocycloalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, boryl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carboxylic acid, ether, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof; wherein LA is complexed to a metal M; wherein M is optionally coordinated to one or more other ligands; wherein the ligand LA is optionally linked with the one or more other ligands to form a tridentate, tetradentate, pentadentate, or hexadentate ligand; and wherein any two substituents are optionally j

Abstract: Provided are compounds having a tetradentate structure of that are useful as emitters in OLED applications.

Abstract: Provided are compounds comprising a six-membered aromatic ring which is fused to two either 5- or 6-membered rings, from which at least one ring is non-aromatic. Also provided are formulations comprising these compounds. Further provided are organic light emitting devices (OLEDs) as well as related consumer products that utilize these compounds.

Abstract: Provided are organometallic compounds comprising an at least bidentate ligand comprising at least five cyclic moieties and a central metal ion which is preferably Ir or Pt. 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 of Formula I, is disclosed. In Formula I, M is Pd or Pt; each of X1 to X12 is C or N; each of X13 and X14 is CH, CD or N; each of Z1, Z2, and Z3 is C or N; L1 is selected from a variety of bivalent linkers; X is selected from O, S, Se, NR?, and CR?R??; each R, R?, R1, R2, R3, RA, RB, RC, RD, and RE is hydrogen or a General Substituent; at least one of Z1, Z2, and Z3 is a carbon atom substituted with a substituent with a molecular weight of at least 16. Formulations, OLEDs, and consumer products that include Formula I are also disclosed.

Abstract: A compound having the following formula is disclosed. The compound is useful as an emitter in OLED applications.

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: A compound having a structure of Formula I, is provided. In Formula I, M is Pt or Pd; rings A, B, C, and D are 5-membered or 6-membered rings; one of Z1, Z2, and Z3 is N and the other two are C; each of X1 to X10 is C or N; K is a direct bond, O, S, N(R?), P(R?), B(R?), C(R?)(R?), or Si(R?)(R?); each of L1 and L2 is a direct bond or a linker; each R, R?, R?, R?, R?, RA, RB, RC, RD, and RE is hydrogen or a General Substituent; R1 is a substituent; at least one RE comprises a substituent selected from the group consisting of aryl, heteroaryl, cycloalkyl, and heteroalkyl; any two substituents may be joined or fused to form a ring, except that RE at X3 or X4 cannot be joined with RA to from a ring. Formulations, OLEDs, and consumer products including the compound are also provided.

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