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

Abstract: A composition comprising a mixture of a first compound and a second compound is provided, where the first compound and second compound are each independently selected from a first group, a second group, or a third group, and the first compound and the second compound are selected from different groups. The first group consists of partially or fully deuterated compounds that comprises a moiety R1, wherein moiety R1 comprises a structure selected from Formula I, Formula II, and Formula III, the second group consists of partially or fully deuterated compounds that comprises a moiety R2, wherein moiety R2 comprises a structure selected from Formula IV, and Formula V, and the third group consists of compounds comprising a structure of Formula VI, Compositions, OLEDs, and consumer products containing the same are also provided.

Abstract: A compound having a Formula Ir(LA)x(LB)y(LC)z, where each of x and y is independently 1 or 2, z is 0 or 1, and x+y+z=3; ligand LA comprises a structure of Formula I, ligand LB comprises a structure of Formula II, and ligand LC is a bidentate ligand. In Formula I and Formula II, each of X2 to X17 is independently C or N; each R2, RA, RB, RC, RD, RE is hydrogen or a General Substituents defined herein; R1 is one of the General Substituents defined herein; and at least one of R1, R2, RA, RB, RC, RD, and RE comprises an electron-withdrawing group, moiety E. Compositions, OLEDs, and consumer products containing the same are also provided.

Abstract: A compound having a first bidentate 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; moiety C is an cyclic moiety; each of Z1 to Z5 is C or N; K is a direct bond or a linking group; each R?, R?, RA, RB, and RC is hydrogen or a General Substituent defined herein; and LA is coordinated to a metal M, which may be coordinated to other ligands. Compositions, OLEDs, and consumer products containing the compound are also provided.

Abstract: An organic light emitting device (OLED) is provided that includes an anode; a cathode; and an emissive region disposed between the anode and the cathode, where the emissive region comprises a first dopant D1 that is a phosphorescent material or a fluorescent material in the OLED at room temperature, a first host H1, a second host H2, and a third host H3. In addition, H1 has an evaporation temperature T1 of 150 to 450° C.; H2 has an evaporation temperature T2 of 150 to 450° C.; H3 has an evaporation temperature T3 of 150 to 450° C.; and the absolute difference between each of T1, T2, and T3 is less than 20° C. A composition that includes at least two of D1, H1, H2, H3, and an acceptor A1, and a method of using the formulation are also provided.

Abstract: An OLED whose emissive layer has compound Ir(LA)2(LB), LA has the structure. and LB has the structure, where moieties A, B, C, and D are each a monocyclic ring or a polycyclic fused ring system; at least one of moiety B or moiety D is a polycyclic fused ring system; Z1 to Z8 are each C or N; L1 and L2 are each a direct bond or a linking group; K1 and K2 are each a direct bond or a linking group; each R, R?, R?, R?, RA, RB, RC, and RD is hydrogen or a General Substituent defined herein; LA and LB are different; and the first triplet excited state energy of Ir(LA)3 is lower than the first triplet excited state energy of Ir(LB)3 or the molecular weight of LA is larger than that of LB.

Abstract: A composition is provided that includes at least one of a first compound, a second compound, or a third compound, where the first compound is a phosphorescent material capable of functioning as a phosphorescent emitter in an OLED at room temperature; the second compound is a fluorescent material capable of functioning as a fluorescent emitter in an OLED at room temperature; the third compound is a host material capable of functioning as a host in an OLED at room temperature; and at least one of the first compound, the second compound, or the third compound comprises at least one substituent R*. OLEDs containing the composition and methods of making an OLED using the composition are also provided.

Abstract: Disclosed is electron/exciton blocking material that is a compound of that is useful in improving the EQE of OLEDs. Also disclosed are OLEDs incorporating the electron/exciton blocking materials in their electron/exciton blocking layers and display devices incorporating such OLEDs.

Abstract: A compound having a formula of M(LA)x(LB)y(LC)z is provided. In the formula, each of LA, LB, and LC is a bidentate ligand; M is a metal; LA has a structure of Formula I, moiety A is a monocyclic ring or a polycyclic fused ring system; moiety B is a polycyclic ring system comprising two 6-membered rings; Z1 to Z4 are C or N; K1 and L1 are each a direct bond or a linker; each R?, R?, RA and RB is hydrogen or a General Substituent; at least one RA or RB comprises RW, where RW has a structure of Formula II, or Formula III, In formulas II and III, R1 and R2 are H, D, or F; R3 is H, D, or alkyl; and at least one of R1 or R2 is H or D. Formulations, OLEDs, and consumer products containing the compound are also provided.

Abstract: A compound having a first ligand LA including a structure of is provided, where at least one of the following is true: (1) at least one RA or RB includes (2) at least one of moiety A or B includes Formula II; (3) LA includes a structure of ?In the compound, each of moieties A to F is a ring or a polycyclic fused ring system; each of Z1 to Z4 is C or N; each of A1 and A2 is N or B; each of K1 and K2 is a direct bond or a linking group; each of L, L1, and L2 is a direct bond or a linking group; and each substituent is hydrogen or a General Substituent defined herein. Compositions, OLEDs, and consumer products containing the compounds are also provided.

Abstract: Provided is an OLED structure includes an organic layer having a primary phosphorescent emitter and a first host; where one of the following conditions is true: (1) the organic layer further includes a secondary emitter; or (2) the OLED further includes a second organic layer where the second organic layer includes a secondary emitter. The primary phosphorescent emitter has a peak emission wavelength ?max that is ?600 nm and ?750 nm; the secondary emitter has a peak emission wavelength ?max that is ?750 nm; the primary phosphorescent emitter is capable of transferring energy to the secondary emitter; the first host has a lowest excited state triplet energy T1 that is at least 0.1 eV higher than that of the primary phosphorescent emitter; the primary phosphorescent emitter has the formula Pt(L1)m; L1 can represent one or more ligands that are the same or different; each L1 is independently monodentate or multidentate; and m represents a maximum possible number of ligands L1 that can coordinate to Pt.

Abstract: A compound is provided that has a formula of Ir(LA)m(LB)n(LC)o, where each of LA, LB, and LC is a bidentate ligand; m is 1, 2, or 3, n and o are 0, 1, or 2, and m+n+o=3. In the formula, one of LA or, when present, LB comprises a structure of Formula I, where at least one RA or RB comprises a structure of Formula II, where each of Z1 to Z4 is C or N; each of moieties A, B, C, and D is a monocyclic ring or a polycyclic fused ring system; each RA, RB, RC, RD, and RN is hydrogen or a General Substituent as defined herein; and at least one RC, RD, or RN includes an electron-withdrawing group. Compositions, OLEDs, and consumer products containing the compound are also provided.

Abstract: A compound having a first ligand LA having the structure of Formula I is provided. Moiety AA is a monocyclic ring or a polycyclic fused ring system; moiety CC is a monocyclic ring. At least one RBB or RCC comprises a silyl group or a germyl group. At least one of the following is true: two RBB substituents are joined or fused to form a moiety BB? that is fused to ring BB, wherein moiety BB? can be further fused or substituted by RBB?; or two RCC substituents are joined or fused to form a moiety CC? that is fused to moiety CC, wherein moiety CC? can be further fused or substituted by RCC?. Compositions, OLEDs, and consumer products containing the compound are also provided.

Abstract: Provided are organometallic compounds comprising a first ligand LA comprising a multicyclic fused ring system wherein ligand LA is coordinated to a metal M; and wherein M is selected from the group consisting of Os, Ir, Pd, Pt, Cu, Ag, and Au. Also provided are formulations comprising these compounds. Further provided are OLEDs and related consumer products that utilize these compounds.

Abstract: A compound having a Formula of Ir(LA)x(LB)y(LC)z, where each of x and y is independently 1 or 2, z is 0 or 1 or 2, and x+y+z=3. In Formula Ir(LA)x(LB)y(LC)z, LA includes a structure of Formula I, LB includes a structure of Formula II, LC is a bidentate ligand; each of X1 to X25 is C or N; Y is a linking group; Lo is a direct bond or a linking group; L is a direct bond or an organic linker; each of moieties A, D, and F is a monocyclic ring or a polycyclic fused ring system; and each substituent is independently H or a General Substituent defined herein. Formulations, OLEDs, and consumer products containing the compound are also provided.

Abstract: Provided are new compositions of matter for host materials in OLEDs by incorporating deuterated moieties in the organic molecules. Also provided are formulations comprising these deuterated compounds. Further provided are OLEDs and related consumer products that utilize these deuterated compounds.

Abstract: A compound having a structure of Formula I In Formula I, M is Pd or Pt; each of X1 to X12 is independently C or N; ring A is a 5-membered or 6-membered ring; K1 and K2 are selected from a direct bond, O, S, and NR; L1 is an organic linker; Y1 is selected from O, S, BR, PR, Se and NRY; each R, RY, RA, RB, RC, and RD is hydrogen or a substituent; and any two substituents can be joined or fused to form a ring. Further provided are OLEDs and related consumer products that utilize these compounds.

Abstract: Disclosed is a compound including a ligand LA of Formula I, In Formula I, moiety B is a monocyclic or polycyclic ring structure comprising 5- and/or 6-membered rings; Y is selected from O, S, NR, and CRR?; Z is carbon or nitrogen; each R, R?, RA, and RB is independently hydrogen or a substituent; LA is coordinated to a metal M; and any two adjacent R, R?, RA, and RB can be joined or fused together to form a ring. Formulations, organic light emitting diodes, and consumer products including the compound are also disclosed.

Abstract: A compound having a structure of Formula I, is provided. In Formula I, two of Z1, Z2, Z3, and Z4 are C and the other two are N; each of X1 to X16 is independently C or N; each of L1 and L2 is independently a direct bond or a linker; one of L1 and L2 is present; M is Pd or Pt; each RA, RB, RC, and RD is independently hydrogen or a substitutent selected from the General Substituent; and any two of RA, RB, RC, and RD can be joined or fused together to form a ring. Formulations, OLEDs, and consumer products including the compound of Formula I are also disclosed.

Abstract: A compound having a first ligand LA including a structure of Formula I, is provided. In Formula I, each of X1 to X6 is independently C or N; X and Y are selected from a group of linking atoms; K is a direct bond or a linking atom; each R is hydrogen or a General Substituent defined therein; and 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.