Abstract: A compound having a structure of formula Ir(LA)x(LB)y(LC)z is provided. In Ir(LA)x(LB)y(LC)z, x is 1, 2, or 3; y is 0, 1, or 2; z is 0, 1, or 2; x+y+z=3; LA has a structure of Formula I, and each of LB and LC is independently a bidentate ligand. In Formula I, moiety A is monocyclic ring or a polycyclic fused ring system; moiety B is a fused bicyclic system; Z1, Z2, and Z3 are each C or N; each RA and RB is hydrogen or a General Substituent defined herein; at least one RA or RB includes an electron-withdrawing group; LA is coordinated to Ir through the indicated dashed lines to form a 5-membered chelate ring; and any two substituents may be joined or fused to form a ring.

Abstract: Provided are compounds having a formula of Ir(LA)p(LB)q(LC)r, wherein LA has a structure of Formula IA: LB has a structure of Formula IB: . Also provided are formulations comprising these compounds. Further provided are OLEDs and related consumer products that utilize these compounds.

Abstract: A compound comprising a first ligand LA of Formula I, is provided. In Formula I, each of X1 to X12 is C or N; Y is a linking group; each RA, RB and RC can be hydrogen or a substituent; at least one RA, RB or RC comprises an electron-withdrawing group; and LA forms a 5-membered chelate ring with an Ir atom via the dashed lines. In addition a number of conditions must be met based on whether or not any pair of RA is joined to form a ring. Formulations, OLEDs, and consumer products containing the compound are also provided.

Abstract: A compound of Ir(LA)m(LB)3-m, having a structure of Formula I, useful as emitters in OLEDs is provided. The variables in Formula I are defined in the present disclosure.

Abstract: A compound comprising 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 to Z4 is C or N; one of K1 or K2 is a direct bond, and the other is a direct bond or a linker; L is a linker; each R?, R?, R, R?, RA, and RB is a General Substituent defined herein; LA is coordinated to a metal M; and the compound includes at least a silyl group, a germyl group, or an electron-withdrawing group. Formulations, OLEDs, and consumer products containing the same are also provided.

Abstract: Provided is a compound having a formula of Ir(LA*)m(LB*)n(LC*)p; wherein each LA, LB, and LC is independently a monoanionic bidentate ligand and different from each other; n and p each is independently 0, 1, or 2; m is 1 or 2; and m+n+p is 3; a free-state of LA has a first triplet energy T1 of EA at 77K; a free-state of LB has a first triplet energy T1 of EB at 77K; a free-state of LC has a first triplet energy T1 of EC at 77K; EA is less than EB and EC whichever EB and EC is present; LA comprises at least one ?-electron deficient electron-withdrawing group; and the compound has an emission spectrum with a FWHM value of no more than 45 nm. Also provided is a compound comprising a first ligand LA having a structure of Formula I, wherein the variables are defined herein.

Abstract: A heteroleptic compound of formula Ir(LA)m(LB)n(LC)p is provided wherein LA has a structure of Formula IA, or Formula IB, LB has a structure of Formula II, and LC is a bidentate ligand; and wherein m is 1 or 2; n is 1 or 2; and p is 0 or 1; and m+n+p=3In Formulae I and II, moieties A and D are heterocyclic ring or a polycyclic ring system; each of X1 to X12 is C or N; Ring B is connected to moiety A by a C; at least one of X9 to X12 is N; Y is a linking group that forms a 5-membered ring; each R, R?, R?, RA, RB, RC, RD, and RE is hydrogen or a General Substituent as defined herein; LA forms a 5-membered chelate ring with Ir. Formulations, OLEDs, and consumer products containing the compound are also provided.

Abstract: A compound of Formula Ir(LA)n(LB)m(LC)p is provided where m and n are 1 or 2, p is 0 or 1, and m+n+p=3. Ligand LA has a structure of ligand LB has a structure of and ligand LC is a bidentate ligand. In the compound, ring A? is a ring or is absent; each of R1 and R1? is alkyl, heteroalkyl, cycloalkyl, heterocycloalkyl, aryl, heteroaryl, silyl, germyl, or a combination thereof; moiety C is a monocyclic ring or a fused ring system; each of Z1 and Z2 and X1 to X11 is independently C or N, except that X12 and X13 are C if ring A? is present; each RA, RA?, RB, RC, and RD is hydrogen or one of the General Substituents; and at least one RC or RD comprises an electron withdrawing group. Formulations, OLEDs, and consumer products containing the compound are also provided.

Abstract: Provided is a compound of Formula of Ir(LA)n(LB)m(LC)o, wherein ligand LA has a structure of Formula I, ligand LB has a structure of Formula II, and LC is a bidentate ligand; and wherein n is 1, or 2; m is 1, or 2; o is 0, or 1; and n+m+o=3; and all the remaining variables are defined herein. Formulations, OLEDs, and consumer products containing the compound are also provided.

Abstract: A compound of Ir(LA)m(LB)3-m, having a structure of Formula I, is provided. In Formula I, moieties A and B are each either a monocyclic ring or a polycyclic fused ring system; X1 to X4 and Z1 to Z4 are C or N; Y is a single atom linker, which can be substituted; each R1, R2, R3, R4, and R5 is hydrogen or a General Substituent; m is 1 or 2; at least one of R1, R2, and R3 comprises at least one first electron-withdrawing group; and at least one of R4 and R5 comprises at least one second electron-withdrawing group. Formulations, OLEDs, and consumer products containing the compound are also provided.

Abstract: A compound having a first ligand LA of Formula I, is provided. In Formula I, each of XB, X1 to X4 is C or N; two adjacent RA are joined together to form a structure of Formula II, each one of moiety B and moiety C is a monocyclic ring or polycyclic ring system; Y is selected from a group of divalent single-atom linkers; each R, R?, R?, RA, RB, and RC is hydrogen or a General Substituent; the first ligand LA is coordinated to metal M through the dashed lines; metal M may be coordinated to other ligands; and any two substituents may be joined or fused to form a ring. Formulations, OLEDs, and consumer products including the compound are also provided.

Abstract: A compound comprising a first ligand LA of Formula I, is provided. In addition, C1 and C2 are joined to a structure of Formula II, In the first ligand, C1 and C2 are carbon atoms; K is selected from the group consisting of a direct bond, O, S, N(R?), P(R?), B(R?), C(R?)(R?), and Si(R?)(R?); each of Y1 and Y2 is O, S, Se, NR, CR?R?, SiR?R?, GeR?R?, BR?, BR?R?, or PR?; Z is selected from the group consisting of N, CR?, SiR?, and GeR?; moiety B is a monocyclic ring or a fused polycyclic ring structure; each R?, R?, RA, RB, R, R?, and R? is hydrogen or a General Substituent; the first ligand is coordinated to a metal M; and any two of RA, RB, R, R? and R? can be joined or fused to form a ring. Formulations, OLEDs, and consumer products containing the compound 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: Provided are compounds that include a ligand LA of the following Formula III: that contain heavy elements like Sb, Bi, Ge, or Te. Also provided are formulations including such compounds. Further provided are OLEDs and related consumer products that utilize such compounds.

Abstract: Disclosed are support-activators and catalyst compositions comprising the support-activators for polymerizing olefins in which the support-activator includes clay heteroadduct, prepare from a colloidal phyllosilicate such as a colloidal smectite clay, which is chemically-modified with a heterocoagulation agent. By limiting the amount of heterocoagulation reagent relative to the colloidal smectite clay as described herein, the smectite heteroadduct support-activator is a porous and amorphous solid which can be readily isolated from the resulting slurry by a conventional filtration process, and which can activate metallocenes and related catalysts toward olefin polymerization. Related compositions and processes are disclosed.

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 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 is a compound including a first ligand LA of Formula I In Formula I, ring C is a 5- or 6-membered ring; each of X1 to X8 is C or N; one of X1 to X4 is C and is connected to ring C, and one of X1 to X4 is N and is coordinated to a metal M; Y is a divalent linker; K is a direct bond, O, or S; each R?, R?, RA, RB, and RC is hydrogen or a general substituent; at least one of RA or RB comprises an electron-withdrawing group; at least one of RB is a cyclic group; and metal M is selected from Os, Ir, Pd, Pt, Cu, Ag, and Au. Formulations, devices, and consumer products comprising the compound are also disclosed.

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: Provided are organometallic compounds comprising a first ligand LA which is based on a structure of fused five and six-membered rings according to Formula I as described herein and their various uses including as emitters in devices. Also provided are formulations comprising these compounds. Further provided are organic light emitting devices (OLEDs) and related consumer products that utilize these compounds.