Abstract: Disclosed is a device that includes an emissive material or region including a host that is doped with a first material as an emitter that is an acceptor and a phosphorescent-capable second material as a sensitizer. The first material and the second material each has a first singlet state and a first triplet state. The first triplet state of the second material is not lower than the first triplet state of the first material. The second material transfers excitons to the first material and the excitons that transition to the first triplet state of the first material can be activated to the first singlet state of the first material through a thermal activation process.

Abstract: The present disclosure provides a compound having a first ligand LA of Formula I, In Formula I, each of Z1, Z2, and X1 to X4 is C or N; moiety A is a monocyclic ring or a polycyclic fused ring system; moiety C is a monocyclic ring or a polycyclic fused ring system; 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?); Y is a linking group; each R, R?, R?, R?, R1, R2, and R3 is hydrogen or a General Substituent defined herein; wherein one of the statements as defined herein is true. Formulations, OLEDs, and consumer products containing the compound are also provided.

Abstract: The disclosure provides a compound having a Formula Ir(LA)x(LB)y(Lc)z or Ir(LA?)p(LB)q(Lc)r, wherein: LA has a structure of Formula IA ?LA? comprising a structure of Formula III: ?LB has a structure of Formula IB: ?LC is a bidentate ligand; and a structure of Formula II, ?is fused to at least one of moieties A, B, C, D, or ring H. Formulations, OLEDs, and consumer products containing the same are also provided.

Abstract: A compound of Formula Ir(LA)x(LB)y(LC)z is provided where x and y are independently 1 or 2; z is 0 or 1; and x+y+z=3; first ligand LA includes a structure of Formula I, ligand LB includes a structure of Formula II: and ligand LC is a bidentate ligand. In the compounds, moiety B is a polycyclic fused ring system comprising at least four rings; each of moiety C and moiety D is a monocyclic ring or a polycyclic fused ring system; each of X1 to X4 and Z1 to Z6 is C or N; L0 is a direct bond or a linking group; YA is a linking group; each substituent is hydrogen or a General Substituent defined herein; 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: Novel metal complexes incorporating boron-containing aromatic compounds useful as a phosphorescent OLED material are disclosed.

Abstract: A compound of Formula Ir(LA)x(LB)(LC)z is provided, where LA comprises a structure of Formula I, and each of LB and LC is a different bidentate ligand. In the compounds of Formula Ir(LA)x(LB)(LC)z, where moiety A is a polycyclic fused ring system comprising at least three rings, including at least one non-benzene ring; moiety B is a monocyclic ring or a polycyclic fused ring system; each of X1, X2, and Z1 is C or N; the Ir—C1 bond is a metal-carbene bond; Y1 is a linker; L1 is a direct bond or a linker; K1 is a direct bond or a linker; and each RA and RB is hydrogen or a general Substituent defined herein. Formulations, OLEDs, and consumer products containing the compound are also provided.

Abstract: Novel Iridium complexes having three different bidentate ligands useful for phosphorescent emitters in OLEDs are disclosed. At least one of the three different bidentate ligands is a carbene ligand.

Abstract: A compound having a first ligand LA comprising a structure of Formula I, where a structure of Formula II, is fused to at least one of moiety A or moiety B by two or more adjacent ones of X1 to X11. In Formulas I and II, each of moiety A and moiety B is a monocyclic ring or a polycyclic fused ring system; each of Z1 to Z4 and X1 to X11 is C or N; each of L, YA, and YB is a direct bond or a linking group; each of K1 and K2 is a direct bond or a linking group; each RA, RB, RC1, RC2, and RC3 is hydrogen or a General Substituent defined herein; 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 Formula I, is provided. In Formula I, M is Pd or Pt; each of X5 to X12, Z1, and Z2 is C or N; Y1, A1, and A2 are C or a heteroatom; if Y1 is O, S, or Se, then A2 and R3 are absent; K, L1, and L2 are a direct bond or a linking group; R1 is a General Substituent defined herein; each R, R?, R?, R?, R2, R3, RA, RB, RC, RD, and RE is hydrogen or a General Substituent defined herein; and (1) one pair of RA, one pair of RB, or one pair of RE substituents join to form a 6-membered ring; or (2) L2 is NR, and R joins with an RE substituent to form a structure of Formula II, Formulations, OLEDs, and consumer products containing the same are also provided.

Abstract: A compound of Formula MLALB where M is Pd or Pt; LA comprises Formula I, and LB comprises Formula II, is provided. In Formulas I and II, moiety A is a monocyclic ring or a polycyclic fused ring system; Z1 is a carbene carbon; each of X1 to X12 and Z2 to Z4 is C or N; each of Y1 and Y2 is a linking group; each of K3 and K4 is a direct bond or a linking group; LA and LB are joined by a direct bond or a linking group; each R, R?, R?, R?, RA, RB, RC, RD, and RE is hydrogen or a General Substituent defined herein; and LA and LB can be further linked to form a macrocyclic tetradentate ligand. Formulations, OLEDs, and consumer products containing the compound are also provided.

Abstract: Provided are organometallic compounds including a ligand LA of Formula I: Also provided are formulations including these organometallic compounds. Further provided are OLEDs and related consumer products that utilize these organometallic compounds.

Abstract: Provided are organometallic compounds comprising an Ir as the central metal atom which is coordinated by three ligands LA, LB, and LC, wherein ligands LA and LB comprise at least two rings. 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 comprising a first bidentate ligand LA having a structure of Formula I, is provided. In Formula I, each of Y1 to Y12 is CR or N; each R can be same or different; each R is hydrogen or a substituent; at least one pair selected from Y3-Y4, Y7-Y8, or Y11-Y12 are CR and the Rs are joined or fused into a ring; and LA is complexed to a metal M selected from the group consisting of Os, Ir, Pd, and Pt. Formulations, OLEDs, and consumer products containing the compound are also provided.

Abstract: An OLED including an anode, a cathode, and an organic layer between the anode and the cathode, where the organic layer includes a compound having the formula [LA]3-nIr[LB]n is disclosed.

Abstract: Disclosed is a device that includes an emissive material or region including a host that is doped with a first material as an emitter that is an acceptor and a phosphorescent-capable second material as a sensitizer. The first material and the second material each has a first singlet state and a first triplet state. The first triplet state of the second material is not lower than the first triplet state of the first material. The second material transfers excitons to the first material and the excitons that transition to the first triplet state of the first material can be activated to the first singlet state of the first material through a thermal activation process.

Abstract: Provided are organometallic compounds including a ligand LA having a structure of Also provided are formulations comprising these organometallic compounds. Further provided are OLEDs and related consumer products that utilize these organometallic compounds.

Abstract: Provided are organometallic compounds comprising a ligand which is at least a two-dentate ligand which comprises at least one 5-membered nitrogen containing heterocyclic ring, the nitrogen of which is bonded to the central metal atom. 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: Provided are multicyclic organic electroluminescent compounds having a ligand LA of Formula I shown below: Also provided are OLEDs and related consumer products that contain an organic layer having these organic electroluminescent compounds.

Abstract: Organic light emitting materials and devices comprising phosphorescent metal complexes comprising ligands comprising aryl or heteroaryl groups substituted at both ortho positions are described. An organic light emitting device, comprising: an anode, a hole transport layer; an organic emissive layer comprising an emissive layer host and an emissive dopant; an electron impeding layer; and electron transport layer, and a cathode disposed, in that order, over a substrate.

Abstract: Provided are organometallic compounds having a structure of Formula I: Also provided are formulations comprising these organometallic compounds. Further provided are OLEDs and related consumer products that utilize these organometallic compounds.