Abstract: Provided are organometallic compounds wherein a central metal atom is coordinated by a tetradentate ligand comprising at least four 5- or 6-membered carbocyclic or heterocyclic rings, wherein one of the at least four 5- or 6-membered carbocyclic or heterocyclic rings is fused to an imidazole ring. 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 is an organic light emitting device comprising a light emitting stack that comprises: a first electrode; a second electrode; a first layer disposed between the first electrode and the second electrode; wherein the first layer is selected from the group consisting of hole injecting layer, hole transporting layer, electron blocking layer, emissive layer, hole blocking layer, electron transporting layer, and electron injecting layer; wherein the first layer comprises a first compound and a second compound mixed together; wherein the first compound comprises a first element (F1) selected from the group consisting of D, F, CN, Si, Ge, P, B, and Se; wherein the second compound comprises a first element (S1) selected from the group consisting of D, F, CN, Si, Ge, P, B, and Se; and wherein the first element of the first compound can be same or different from the first element (S1) of the second compound.

Abstract: A compound comprising a structure of Formula I, is provided. In Formula I, RW has a structure of Formula II, where at least two RE substituents are joined to form a 5- to 10-membered ring; each of X1 to X11 and Z1 to Z3 is C or N; M is Pd or Pt; each of moiety A, moiety B, moiety C, and moiety D is a ring or a polycyclic fused ring system; each of L1 and L2 is a direct bond or a linker; each substituent is hydrogen or a General Substituents 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: Provided are OLEDs whose EML has a figure of merit (FOM) value of equal to or larger than 2.50 that have enhanced efficiency and lifetimes. FOM can be determined according to the methods disclosed herein.

Abstract: The present invention is generally directed to novel fluorophores and their use in imaging methods. In one case, the present invention provides a compound according to the structure shown in FIG. 20A. In another case, the present invention provides a method of imaging one or, more cellular structures within one or more cells using a compound of the structure shown in FIG. 20A.

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: Provided are organic compounds comprising at least three 6-membered aromatic rings A, B, and C which are all directly bonded to the same central nitrogen atom, wherein rings A and B as well as rings A and C are further connected via a direct bond so to form each a five-membered ring containing the central nitrogen atom. Also provided are formulations comprising these organic compounds. Further provided are organic light emitting devices (OLEDs) and related consumer products that utilize these organic compounds.

Abstract: Provided are compounds which comprise at least a first structure comprising five rings which are fused together and contain one of the group consisting of B, Al, Ga, PO, and N as the central atom/group, and a second structure comprising a 5-membered nitrogen-containing ring to which two 6-membered rings are fused. Also provided are formulations comprising these compounds. Further provided are organic light emitting devices (OLEDs) and related consumer products that utilize these compounds.

Abstract: Compounds of are provided. In these structures, M is Pt or Pd; each of X1 to X6, X9 to X12, and Z1 to Z3 is C or N; 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; each K1, K2, and K3 is a bond, O, or S; when Z1 is N, ring A in Formula I is not a pyridine or pyrazole; L? is a bond or an organic linker; Y is selected from the group consisting of amino, alkoxy, aryloxy, or SiR1R2R3; when Y is SiR1R2R3, L2 is not BR. Devices, consumer products, and formulations containing these compounds are also disclosed.

Abstract: Provided are compounds comprising as a central moiety a 6-membered aromatic ring which is fused to a 5-membered heterocyclic ring comprising at least two nitrogen atoms. 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: According to an embodiment, an organic light emitting diode/device (OLED) is also provided. The OLED can include an anode, a cathode, and an organic layer, disposed between the anode and the cathode. According to an embodiment, the organic light emitting device is incorporated into one or more device selected from a consumer product, an electronic component module, and/or a lighting panel.

Abstract: Provided are neutral Pt or Pd organometallic compounds comprising a tetradentate ligand, wherein the organometallic compound comprises at least one Pt—C or Pd—C bond. Also provided are formulations comprising these organometallic compounds. Further provided are organic light emitting devices (OLEDs) as well as related consumer products that utilize these organometallic compounds.

Abstract: Provided are organometallic compounds that include a ligand LA of that are useful as emitters in OLEDs. Also provided are formulations comprising these organometallic compounds. Further provided are OLEDs and related consumer products that utilize these organometallic compounds.

Abstract: Provided are OLEDs that are designed with a specific material sets that minimize the lifetime degradation of the OLED at elevated temperatures, where the features of such OLED are defined by a ratio ?LT defined as (LT90 of the OLED measured at 40° C.)/(LT90 of an identical OLED measured at 20° C.) when each of the OLED and the identical OLED is run at the same current density; wherein the resulting ?LT is greater than 0.4.

Abstract: Provided are organometallic compounds comprising a polycyclic structure with at least two heteroaromatic rings, wherein at least two nitrogen-containing groups are bonded to a first of the at least two heteroaromatic rings and at least group RA selected from NR5R6 or SiR7R8R9 is bonded to a second of the at least two heteroaromatic 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: In one aspect, provided is a compound of Formula I, In Formula I, M is Pt or Pd; L has the structure F1 is or a direct bond; rings A, B, C, D, and F are independently monocyclic rings or multicyclic fused ring systems; each of X1 to X10 is independently C or N; each of Z1 to Z4 is C or N; each of L1 to L5 is a direct bond or an organic linker, each of a, b, c, and d is 0 or 1; each K1 to K4 is a direct bond, O, or S; each of Z1 to Z4 that is connected to O or S is C; and each RA, RB, RC, RD, RE, and RX is independently hydrogen or a substituent.

Abstract: A compound of Formula I, is provided. In Formula I, moiety A and moiety B are monocyclic rings or polycyclic ring structures; X1 and X2 are C or N; each RA, RB, RC, RD, RE, RF, and RX is hydrogen or a substituent; at least one of RA, RB, RC, RD, RE, RF, and RX comprises a silyl group; if n=1, then RD is joined with RF to form a ring; if n=0 and m=1, then RD is joined with either RE or RA to form a ring, with the proviso that if RD is joined to RA, then RX is a substituted or unsubstituted aryl or heteroaryl group; and if n=0 and m=0, then the compound has the structure of Formula V, Formulations, OLEDs, and consumer products comprising the compound are also provided.

Abstract: Provided are OLEDs whose EML has a figure of merit (FOM) value of equal to or larger than 2.50 that have enhanced efficiency and lifetimes. FOM can be determined according to the methods disclosed herein.

Abstract: Provided is an OLED that includes: a first electrode; a second electrode; a first layer, and an emissive layer disposed between the first electrode and the second electrode, where the first layer is selected from the group consisting of a hole injecting layer, a hole transporting layer, an electron blocking layer, a hole blocking layer, an electron transporting layer, and an electron injecting layer; and the first layer includes a first compound that includes a first element selected from the group that only includes D, F, CN, Si, Ge, P, B, and Se.

Abstract: Provided is an organic light emitting device including a light emitting stack that includes: a first electrode; a second electrode; a first layer disposed between the first electrode and the second electrode. The first layer can be a hole injecting layer, a hole transporting layer, an electron blocking layer, an emissive layer, a hole blocking layer, an electron transporting layer, or an electron injecting layer. The first layer includes a first compound and a second compound mixed together. The first compound includes a first element (F1) that can be D, F, CN, Si, Ge, P, B, or Se. The second compound includes a first element (S1) that can be D, F, CN, Si, Ge, P, B, or Se. The first element of the first compound can be same or different from the first element (S1) of the second compound.