A compound including a first ligand L.sub.A selected from the following group: ##STR00001##
is disclosed.

A compound of Formula (L.sub.A).sub.n-M-(L.sub.C).sub.m, wherein the ligand L.sub.A is of Formula I, and the ligand L.sub.C is selected from Formula I that is different than ligand L.sub.A, a monoanionic bidentate ligand, or a monoanionic monodentate ligand. M is a metal; and n is 1 or 2, and m is 0, 1 or 2. ##STR00001## Ring A is a 5-membered or 6-membered heteroaryl ring, which is bonded to Ring B; Z is selected from O or S; Z.sup.1 is selected from a carbene C or N; and Z.sup.2 is selected from C or N. Moreover, two adjacent ring carbons of Ring B will form a group of formula D, wherein * represents the point of attachment to the two adjacent ring carbons, ##STR00002## Formula D, wherein X is selected from NR.sup.N, O, S, or Se; and R.sup.N is selected from the group consisting of hydrogen, deuterium, alkyl, cycloalkyl, heteroalkyl, aryl, heteroaryl, and combinations thereof; and Y.sup.1, Y.sup.2, Y.sup.3, and Y.sup.4 are independently CR.sup.Y1, CR.sup.Y2, CR.sup.Y3, and CR.sup.Y4, respectively, or N, and Ring D has no more than two nitrogen ring atoms. An OLED that includes a compound of the Formula I above in an organic layer is also described.

A method of fabricating a perovskite light emitting device is provided. In one embodiment, the method comprises the steps of: providing a substrate; providing a first electrode disposed over the substrate; providing a bank structure disposed over the substrate, wherein the bank structure is patterned so as to define at least one sub-pixel on the substrate; providing a first transport layer ink, wherein the first transport layer ink comprises at least one solvent and at least one first charge transport material mixed in the at least one solvent; depositing the first transport layer ink into the at least one sub-pixel over the first electrode using a method of inkjet printing; vacuum drying the first transport layer ink inside a vacuum drying chamber to assemble a first transport layer over the first electrode in the at least one sub-pixel; annealing the first transport layer; providing a perovskite ink, wherein the perovskite ink comprises at least one solvent and at least one perovskite light emitting material mixed in the at least one solvent; depositing the perovskite ink into the at least one sub-pixel over the first transport layer using a method of inkjet printing; vacuum drying the perovskite ink inside a vacuum drying chamber to assemble a perovskite emissive layer over the first transport layer in the at least one sub-pixel; annealing the perovskite emissive layer; and depositing a second electrode over the perovskite emissive layer using a method of vapour deposition. Perovskite light emitting devices and displays fabricated using the provided method are also provided.

A display device includes a first bank and a second bank spaced apart from each other on a substrate, at least one semiconductor layer disposed between the first bank and the second bank, a first electrode disposed on the first bank and electrically connected to a part of the at least one semiconductor layer, an organic functional layer disposed on another part of the semiconductor layer and comprising at least an organic light emitting layer, and a second electrode disposed on the organic functional layer.

A light emitting device comprises a first electrode, a second electrode, and an emissive layer (EML) between the first electrode and the second electrode and electrically connected to the first electrode and the second electrode. The EML comprises a charge transport matrix of a first polarity, a plurality of quantum dots in the charge transport matrix, and a plurality of charge transport nanoparticles of a second polarity in the charge transport matrix.

A compound of the formula ML.sub.AL.sub.B where ligand L.sub.A is of Formula I, and ligand L.sub.B is of Formula II below. ##STR00001## M is selected from Os(II) or Ru(II), and the compound ML.sub.AL.sub.B has a formal neutral charge; and rings A, B, C, D, E, and F are independently a 5-membered or 6-membered aromatic ring, and R.sup.A, R.sup.B, R.sup.C, R.sup.D, R.sup.E,and R.sup.F each independently represent mono to the maximum allowable substitution, or no substitution. L.sup.1, L.sup.2, L.sup.3, and L.sup.4 independently represent a single bond or an organic linking group; W.sup.1, W.sup.2, W.sup.3, and W.sup.4 are independently selected from carbon or nitrogen; Y.sup.1, Y.sup.2, Y.sup.3, and Y.sup.4 are independently selected from carbon or nitrogen; and Z.sup.1, Z.sup.2, and Z.sup.3 are independently selected from carbon or nitrogen, and at least one of Z.sup.1, Z.sup.2, and Z.sup.3 is nitrogen. An organic electroluminescent device that includes an anode, a cathode, and an organic layer comprising a compound of the formula ML.sub.AL.sub.B where ligand L.sub.A is of Formula I, and ligand L.sub.B is of Formula II above. A consumer product comprising an organic light-emitting device (OLED) above.

A compound of Formula I ##STR00001##
wherein M is a metal selected from Ir or Os;
rings A, B, C, D, E, and F are independently a 5-membered or 6-membered aromatic ring; Z.sup.1 to Z.sup.14 are independently selected from C or N; X is selected from a direct bond, or a linker with one to ten backbone member atoms; and Y is selected from a direct bond, a linker with one to ten backbone member atoms, or is absent to provide an open hexadentate ligand. An organic electroluminescent device (OLED) that includes an anode, a cathode, and an organic layer comprising a compound of the Formula I, and a consumer product comprising the OLED.

An organic light emitting device (OLED) that includes an anode, a cathode, and an organic layer disposed between the anode and the cathode, the organic layer comprising a light-emitting dopant within a host material, the host material including an optically active host compound; wherein one enantiomer of the optically active host compound is present in an enantiomeric excess (ee) of at least 75%. A consumer product that includes the OLED.

An electroluminescent display and illuminating device and a manufacturing method thereof are provided. Layers of light-emitting devices of an electroluminescent display and an electroluminescent illuminator are assembled, and the two devices share an electrode in a middle of a laminated structure, thereby realizing a display function on one side of the device and realizing a illumination function on the other side of the device, so that a shape design of a product can be more flexible.

The present disclosure relates to a light-emitting diode including a first electrode and a second electrode facing each other; an electron transfer layer between the first electrode and the second electrode; and a light emitting material between the first electrode and the second electrode, wherein the electron transfer layer consists of anisotropic nanorods, and the long axes of the anisotropic nanorods are arranged at an angle of about 20 degrees to about 90 degrees with respect to an interface with an adjacent layer into which electrons are injected.