Heteroleptic compounds having a structure of Ir(L.sub.A).sub.p(L.sub.B).sub.q(L.sub.C).sub.r, where L.sub.B and L.sub.C are different bidentate ligands, p is 1 or 2, q is 1 or 2, r is 0, 1, or 2, and ligand L.sub.A has a structure of Formula I,

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In Formula I, moiety B is a monocyclic or polycyclic fused ring system; each of X.sup.1 to X.sup.6 is C or N; each R.sup.A, R.sup.B, and R.sup.C is independently a hydrogen or a general substituent; at least one R.sup.B comprises a partially or fully deuterated alkyl or cycloalkyl group; if moiety B is phenyl, at least two adjacent R.sup.C substituents are fused to form a ring, with the proviso that at least one L.sup.B or L.sup.C is present and is not a phenylpyridine-based ligand. Formulations, OLEDs, and consumer products containing the same are also disclosed.

A display device includes at least the following: a single contact hole; n TFTs , where n is a natural number equal to or greater than two; and n electrodes-(6), wherein the n electrodes-(6) are electrically connected to the respective n TFTs via the single contact hole.

According to an aspect of the disclosure, a first light-emitting layer coincides in plan view with each whole of a plurality of pixel electrodes included in a plurality of second sub-pixels, and with each whole of a plurality of pixel electrodes included in a plurality of third sub-pixels. The first light-emitting layer is shaped into a continuous form. A third light-emitting layer in plan view: has an opening kb1 inside a peripheral end portion of each of a plurality of pixel electrodes included in a plurality of first sub-pixels, and coincides with a whole circumference of the peripheral end portion; and has an opening inside a peripheral end portion of each of a plurality of pixel electrodes included in the plurality of second sub-pixels, and coincides with a whole circumference of the peripheral end portion-Sg.

An organic light emitting diode and an organic light emitting device thereof are provided, each including a first compound represented by following structure, a second compound as a p-type host and a third compound as an n-type host in an emitting material layer. As a result, the organic light emitting diode and the organic light emitting device have advantages in the driving voltage, the luminous efficiency and the lifespan. The organic light emitting device includes the organic light emitting diode and can be a display device or a lighting device.

##STR00001##

A light-emitting element has the following: a cathode; an anode; a light-emitting layer disposed between the cathode and the anode, and containing quantum dots; and a hole transport layer disposed between the anode and light-emitting layer. The hole transport layer has a first region adjacent to the anode. The hole transport layer also has a second region closer to the light-emitting layer than the first region is. The second region adjoins to the light-emitting layer. The first region has an ionization potential larger than an ionization potential of the second region and larger than an ionization potential of the light-emitting layer.

In an element provided with a QD layer including QD phosphor particles, a first hole transport layer located between a first electrode and the QD layer is formed of a continuous film of a first carrier transport material. A second hole transport layer located between the first hole transport layer and the QD layer includes nanoparticles formed of a second carrier transport material.

A light-emitting device includes a light-emitting layer containing: quantum dots serving as light emitters; and dummy flakes not involved in emitting light. The quantum dots are localized. Thanks to such features, light generated from the quantum dots is diffracted in the light-emitting layer, directed in a normal direction that is a thickness direction of an array substrate, and emitted out of the light-emitting device.

The present application relates to an electronic device having defined composition of the emitting layer. The application furthermore relates to the use of the device in displays or in lighting applications.

The present application relates to an electronic device having defined composition of the emitting layer. The application furthermore relates to the use of the device in displays or in lighting applications.

An iridium complex which has a phenylpyridine bidentate ligand containing a group represented by the following general formula (A): ##STR00001##
wherein X represents a cyano group or a halogenated alkyl group; L represents a single bond or a divalent linking group; R represents a substituent; n represents an integer of 0 to 4; * represents a binding site to a phenylpyridine bidentate ligand.