Abstract: A composition formed of a mixture of two compounds having similar thermal evaporation properties that are pre-mixed into an evaporation source that can be used to co-evaporate the two compounds into an emission layer in OLEDs via vacuum thermal evaporation process is disclosed. The first and second compounds can have an evaporation temperature T1 and T2, respectively, of 150 to 350° C., and the absolute value of T1-T2 can be less than 20° C. The first compound can have a concentration C1 in the mixture and a concentration C2 in a film formed by evaporating the mixture in a vacuum deposition tool at a constant pressure between 1×10?6 Torr to 1×10?9 Torr, at a 2 ?/sec deposition rate on a surface positioned at a predefined distance away from the mixture being evaporated, where the absolute value of (C1-C2)/C1 is less than 5%.

Abstract: A compound comprising a first ligand LA of Formula I, is provided. In Formula I, each of X1 to X6 is C or N; K is a direct bond or a linker; each of L1 and L2 is a linker; each R, R?, R?, R?, RA, and RB is hydrogen or a General Substituent defined herein; two RB are joined to form a ring; LA is coordinated to a metal M. Formulations, OLEDs, and consumer products containing the compound are also provided.

Abstract: A compound comprising a first ligand LA of Formula I, is provided. In the compound, X1 and X2 are C or N; YA and YC is each single atom bridges, which can be substituted; each RA, RB, and RC is a hydrogen or a General Substituent defined herein; LA is coordinated to a metal M, and LA may be joined with other ligands; 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: A compound comprising a first ligand LA of Formula I, In Formula I, X1 to X7 are each C or N; K1 is a direct bond or a linker; R1 and R2 are substituents; each R3, R4, R5, R?, R?, RA, RB, and RC is hydrogen or a General Substituent defined herein; LA is coordinated to a metal M; when R1 is substituted or unsubstituted aryl, specific conditions must be met, and when R1 is alkyl, other conditions must be met. Formulations, OLEDs, and consumer products containing the compound are also provided.

Abstract: A compound of formula Ir(LA)x(LB)y(LC)z, where x and y are 1 or 2; z is 0 or 1; and x+y+z=3. In the compound, LA comprises Formula I, ligand LB comprises Formula II, and ligand LC is a bidentate ligand. In Formulas I and II, moiety A is a monocyclic ring or a polycyclic fused ring system; each of X1 to X14 is C or N; Y is a linking group; each R1-R2, R, R?, and RA-RE is hydrogen or a General Substituent defined herein; at least one of R1 and R2 is a tertiary alkyl group; and (1) at least one pair of RB or RC substituents are joined or fused to form a ring, or (2) at least one RC or RB comprises an electron-withdrawing group other than nitrile, or (3) X11 is N, R1 is a tertiary alkyl group. Formulations, OLEDs, and consumer products containing the compound are also provided.

Abstract: A compound comprising a ligand LA, having a structure of Formula I, is provided. In Formula I, A1 to A8 are each independently CR or N; at least two adjacent ones of A1 to A8 are CR and the Rs are joined together to form a six-membered ring fused to ring A or ring C; X is O, S, or Se; each R and RB is independently hydrogen or a substituent; any adjacent substituents are optionally joined or fused into a ring; the ligand LA is coordinated to a metal M; the metal M is bonded to ring A through a M-C bond; the metal M can be coordinated to other ligands; and the ligand LA is optionally linked with other ligands. Formulations, OLEDs, and consumer products containing such compounds are also disclosed.

Abstract: Provided are compounds having a ligand LA of Formula I that are useful as emissive compounds in organic light emitting devices.

Abstract: Embodiments of the disclosed subject matter provide a device that includes an organic light emitting device (OLED), and a drive circuit to control the operation of the OLED, comprising a response time accelerator thin film transistor (TFT) configured to short or reverse bias the OLED for a predetermined period of time during a frame time. Other embodiments include an OLED having a plurality of sub-pixels, where one or more of sub-pixels configured to emit light of at least a first color comprises a first emissive area and a second emissive area that are independently controllable, where the first emissive area is larger than the second emissive area. The controller is configured to control the second emissive area to have (i) a higher brightness, and/or (ii) a higher current density than the first emissive area for a first sub-pixel luminance level that is less than a maximum luminance.

Abstract: A compound of Ir(LA)m(LB)3-m, having a structure of is provided. In Formula I or Formula II, moieties A and B are each either a monocyclic ring or a polycyclic fused ring system; X1 to X8 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 including a structure of Formula I: In Formula I, ring A is 5-membered heterocyclic ring; each of Z1, Z2, and X1 to X5 is C or N; Y is a linking group; K is a direct bond or a linking group; RZ is a General Substituent defined herein; each other substituent is hydrogen or a General Substituent defined herein; and (1) two RC substituents are joined together to form a ring, or (2) the compound comprises an electron-withdrawing group. Formulations, OLEDs, and consumer products containing the compound are also provided.

Abstract: A compound comprising a first ligand LA of Formula I, is provided. In the compound, ring B is a 5- or 6-membered ring; each of Z and X1 to X4 is C or N; Y is a linking atom; K is a direct bond or a linking atom; each R*, RA, RB, and RC is hydrogen or a General Substituent defined herein; a total of at least two of RB and/or RC substituents are independently electron-withdrawing groups; 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.

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, moiety B is a polycyclic fused ring system; each of Z1 to Z4 is C or N; each of K1 and K2 is a direct bond or a linker; at least one RB or RA comprises, where T is B, C, N, Si, Ge, Bi, or P; V is a direct bond or a linker; R1 and R2 are present, and R3 is optionally present; each substituent is independently hydrogen or a General Substituent defined herein; and at least two of R1, R2, and R3 has two or more carbon atoms. Formulations, OLEDs, and consumer products containing the compound are also provided.

Abstract: This disclosure provides a compound, Ir(LA)p(LB)q(LC)r, where LA has a structure of Formula IA: LB has a structure of Formula IB: and LC is a bidentate ligand. In Formulas IA and IB, p and q are 1 or 2; r is 0 or 1; and p+q+r=3; moiety A is a monocyclic ring or a polycyclic fused ring system; Y is a linker that forms a 5-membered ring; each of Z1, Z2, and X1 to X16 is C or N; each substituent is hydrogen or a General Substituent defined herein; and at least one of RD or RE is a heterocycle, provided that (a) if RE is a heterocycle comprising one heteroatom, then p=1 and moiety A is not a fused imidazole; and (b) if one RD is pyridine, then each of X1-X8 is C. Formulations, OLEDs, and consumer products containing the compound are also provided.

Abstract: A compound comprising a first ligand LA of Formula I, is provided, where: each of moiety A and moiety B is a monocyclic ring or a polycyclic fused ring system; each of X1 to X4 and Z1 and Z2 is C or N; K1 and K2 are each a direct bond or a linker; L1 is a direct bond or an organic linker; each R?, R?, RA and RB is hydrogen or a General Substituent defined herein; and at least one RA or one RB comprises R*, where R* is an alkyl group, a silyl group, a germyl group, or a combination thereof. Formulations, OLEDs, and consumer products containing the compound are also provided.

Abstract: A compound of Formula Ir(LA)x(LB)y(LC)z is provided, where the first ligand LA comprises a structure of Formula I, ?the ligand LB comprises a structure of Formula II, ?and the ligand LC is a bidentate ligand. In the compound, each of A1 to A8, X1 to X4, Z1, and Z2 is C or N; at least one of X1 to X4 is N, or at least one RA is electron withdrawing group, a silyl group, a germyl group, a heteroalkyl group, a cycloalkyl group, a hetrocycloalkyl group, an alkyl group having three or more carbon atoms, or combinations thereof; Y is a linking group; moiety C is a monocyclic ring or a polycyclic fused ring system; and each R, R?, R1, R2, R3, R4, RA, RB, RC, and RD is hydrogen or a General Substituent defined herein. Formulations, OLEDs, and consumer products containing the compound are also provided.

Abstract: An organic light emitting device (OLED) having an anode; a cathode; and an emissive layer, disposed between the anode and cathode is provided, where the emissive layer includes a first compound of Formula I, and a second compound of Formula II, In the OLED, the LUMO energy of the second compound is ? to ?2.33 eV and at least one RD substituent is not hydrogen.

Abstract: Embodiments of the disclosed subject matter provide a device including one or more organic layers that include an emissive layer, a first electrode layer disposed over the one or more organic layers, a plurality of nanostructures formed as part of the first electrode layer, a substrate, a second electrode layer, where the second electrode layer is disposed on the substrate, the one or more organic layers are disposed on the second electrode layer, and the first electrode layer including the plurality of nanostructures is disposed on the one or more organic layers and within the predetermined threshold distance of the emissive layer.

Abstract: A compound of Formula Ir(LA)p(LB)q(LC)r is provided, where ligand LA has a structure of Formula I, LB and LC are bidentate ligands; p is 1 or 2; the compound is heteroleptic; moieties A, B, and C are each monocyclic rings or polycyclic fused ring systems; Z1 and Z2 are C or N; K is a direct bond or a linker; each RA, RB, RC, or other R variable is hydrogen or a General Substituents defined herein; and any two substituents may be joined or fused to form a ring.

Abstract: Provided is a compound having a formula of M(LA)(LB)(LC); where LA, LB and LC are each a bidentate ligand and are different from each other; M is selected from the group consisting of Ir, Os, Rh, Ru, Pt, and Pd; two or three of LA, LB and LC are optionally linked together to form a tetradentate or hexadentate ligand; LA has a structure of Formula I: where moieties A and B are each independently a monocyclic ring or a polycyclic fused ring system, where the monocyclic ring or each ring of the polycyclic fused ring system is independently a 5-membered to 10-membered carbocyclic or heterocyclic ring; X1 to X4 are each independently C or N; Z1 and Z2 are each independently C or N; K1 and K2 are each independently a direct bond, O, S, N(R?), P(R?), B(R?), C(R?)(R?), and Si(R?)(R?); Z1 is C if K1 is not a direct bond, Z2 is C if K2 is not a direct bond; L1 is a direct bond or an organic linker; RA and RB each independently represent mono to the maximum allowable substitution, or no substitution; wherein each R?

Abstract: New organometallic complexes having bis- or tris-heteroleptic ligands and large aspect ratio in one direction and their use in OLEDs to enhance the efficiency is disclosed. Such compounds can have a structure of Formula III, where rings A, B, C, and D are ring; L1 and L3 each a direct bond or a linking group; n1 and n2 are 0 or 1; if n1 or n2 is 1, then L2 or L4 is a direct bond or a linking group, and if n1 or n2 is 0, L2 or L4 is not present; Q1, Q2, Q3 and Q4 are a direct bond or oxygen; ring A is trans to ring D, ring B is trans to ring C in a square-planar coordination configuration; M2 is Pt, and the compound comprises at least one Pt-carbene bond.