Abstract: A compound of Formula I wherein at least one of R1 or R2 includes a polycyclic group selected from the group consisting of Formula A, Formula B, and Formula C: wherein X1, X2, X3, and X4 are independently CRA or N; X5, X6, X7, and X8 are independently CRB or N; X9, X10, X11, and X12 are independently CRC or N; X13, X14, X15, and X16 are independently CRD or N; X17, X18, X19, and X20 are independently CRE or N; X21, X22, X23, and X24 are independently CRF or N; X25, X26, X27, and X28 are independently CRG or N; X29, X30, X31, and X32 are independently CRH or N; Y is selected from the group consisting of O, S, NR, and CRR?; the maximum number of N atoms that can connect to each other within each ring is two; with the proviso that R1 does not connect to ring B, and R2 does not connect to ring A, and wherein at least one of RC and RD of Formula A is a direct bond or an organic linker, one of RE and RF of Formula B is a direct bond or an organic linker, or one of RG, RH, and RN of Formula C is a d

Abstract: Provided is a new composition of matter for boron containing organic molecules which can be used as hosts or emitters in OLED devices.

Abstract: A novel compound having a benzimidazole based structure is disclosed that is selected from one of the following structures: The compound is useful in improving photophysical performance of OLEDs.

Abstract: A compound comprising a first ligand LA comprising a structure of Formula I, is provided. In Formula I, moieties A, B, C, and D are each independently a monocyclic ring or a multicyclic fused ring system; each of X1 to X8 is C or N; each independently represents a single bond or a double bond; each of L1, L2, L3, and L4 is independently a direct bond or a linking group; each R, R?, R?, RA, RB, RC, and RD is a hydrogen or a General Substituent; any two adjacent R, R?, R?, RA, RB, RC, and RD may be joined or fused to form a ring; and LA is coordinated to a transition metal M. Formulations, OLEDs, and consumer products containing the compound are also provided.

Abstract: A compound having a ligand LA comprising a structure of Formula I, is provided. In Formula I, moiety A is a monocyclic ring or a polycyclic fused-ring system; each of X1 to X12 is C or N; represents a single bond or a double bond in a Lewis structure; each RA, RB, RC, and RD is hydrogen, metal M, a General Substituent, or a substituent comprising metal M; metal M has an atomic mass of at least 40; and any two substituents may be joined to form a ring. Formulations, OLEDs, and consumer products comprising the compound are also provided.

Abstract: Provided are organic compounds comprising a central eight-membered ring which is formed by connecting four 6-membered aromatic rings. The compound further comprises a first and a second chemical structure which are selected from Formulas II-VI. 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 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: Provided are compounds comprising at least four six-membered rings wherein two atoms of each of these four six-membered rings are connected to form an at least eight membered ring and a further ligand which is connected to the at least eight-membered ring via a linker. 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 are compounds comprising a first moiety and a second moiety, wherein the first moiety comprises an azabenzene joined to a trivalent nitrogen atom that is part of an at least three-cyclic heteroaromatic ring system. 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 are compounds comprising a 9-membered ring to which four 6-membered carbocyclic or heterocyclic aromatic rings as well as one further 5-membered or 6-membered heterocyclic ring are fused. 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: A compound of a first ligand LA of Formula I, is provided. In Formula I, moieties A and B are each a monocyclic ring or a polycyclic fused-ring system; Z1 to Z4 are each C or N; K is a direct bond, O, or S; each RA and RB is independently a hydrogen or a General Substituent; at least one RA or RB is R*, wherein R* has a structure of Formula II, ---L-GeR1R2R3; L is a direct bond or an organic linker; and LA is coordinated to a metal M by the dashed lines; and metal M is selected from Ir, Rh, Re, Ru, Os, Pt, Pd, Ag, Au, or Cu.

Abstract: Provided are organometallic compounds based on platin or palladium and their various uses including as emitters in devices having the structure of Formula I comprising at least four rings as defined herein. Also provided are formulations comprising these compounds. Further provided are organic light emitting devices and related consumer products that utilize these compounds.

Abstract: A compound of Formula I is provided. In Formula I, ring A is a heterocyclic ring; ring B is a 5- or 6-membered ring, and rings C and D are 6-membered rings; one of Z1, Z2, and Z3 is N and the remainder are C; at least one of K1, K2, and K3 is O or S; one of L1 and L2 is absent and the other one is a direct bond or a linker; when m=0, L1 is not present and X1 is NRA?; each R, R?, R?, RA?, RA, RB, RC, and RD is independently hydrogen or a substituent selected from the general substituents defined herein; and any two substituents may be joined or fused together to form a ring. Formulations, OLEDs, and consumer products incorporating such compounds are also provided.

Abstract: A compound of Formula I, is provided. In Formula I, rings A, B, and D are independently 5- or 6-membered rings; Z1-Z3 and X1-X5 are independently C or N; each of K1 and K2 are a direct bond, O, and S; Y1 is BR, NR1, O, S, Se, or CRR?; represents a single bond or no bond; when present, L1, L2, L3, and L4 are each independently a direct bond or a linker; each substituent is hydrogen or a general substituent and can be joined together to form a ring. Formulations, OLEDs, and consumer products containing the same are also provided.

Abstract: Provided are organometallic compounds. Also provided are formulations comprising these organometallic compounds. Further provided are OLEDs and related consumer products that utilize these organometallic compounds.

Abstract: A compound of Formula I: wherein: X1-X8 are each independently C or N, wherein two adjacent X1-X8 are carbon-fused to a structure of Formula II: X9-X12 are each independently C or N; A1, A2, and A3 are each independently selected from the group consisting of O, S, Se, N, NR, CR, CRR?, SiR, SiRR?, GeR, and GeRR?, with at least one of A1 and A2 being N or NR; each occurrence of is independently a single bond or a double bond, wherein one occurrence of is a single bond and one occurrence of is a double bond; each of RA, RB, and RC independently represents zero, mono, or up to a maximum allowed substitution to its associated ring; each of occurrence R, R?, RA, RB, and RC is independently a hydrogen or a substituent selected from the group consisting of Formula III, Formula IV, Formula V, Formula VI, Formula VII, Formula VIII, Formula IX, deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, heterocycloalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, boryl, alkenyl, cycloalkenyl, heteroalkenyl, a

Abstract: A compound having the structure of Formula I, is provided. In Formula I, M is Pt or Pd; moieties A, B, C, and D are each monocyclic or multicyclic ring system; K1, K2, K3, and K4 are selected from a direct bond, O, S, and Se; when present, 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; and the compound comprises at least one structure Formulations, OLEDs and consumer products containing the compound are also provided.

Abstract: Provided is a compound comprising a first ligand LA of

Abstract: A compound comprising a metal M and a first ligand LA having a structure of Formula I, is described. In Formula I, each independently represents a single bond or a double bond; each of X1? to X4? is independently C, N, or NR?; at least one of X1 to X4 is NR?; each RA?, R?, R1, R2, and R3 is independently hydrogen or a general substituent; at least one of RA?, R?, R1, R2, and R3 comprises the metal M; when X1 and X2 are both NR?, the B atom of Formula I forms a maximum of one direct bond to a nitrogen atom, and does not form a direct bond to an oxygen atom; and any two adjacent RA, R?, R1, R2, and R3 can be joined or fused to form a ring. Formulations, OLEDs, and consumer products including the compounds are also described.

Abstract: Provided are compounds comprising a structure comprising at least five rings which are fused together, and which contain a central nitrogen atom, wherein at least two of the five rings are aromatic and at least one ring is a five-membered ring which is optionally aromatic. Also provided are formulations comprising these compounds. Further provided are organic light emitting devices (OLEDs) and related consumer products that utilize these compounds.