An organic light emitting device having a light emitting layer that contains first to fourth organic compounds satisfying the following formulae can realize long-life emission with high color purity. The second and the third organic compounds are delayed fluorescent materials, and the emission amount from the fourth organic compound is the maximum. E.sub.S1 is a lowest excited singlet energy, E.sub.T1 is a lowest excited triplet energy and C.sub.onc is a concentration in the light emitting layer. E.sub.S1(1)>E.sub.S1(2)>E.sub.S1(4)>E.sub.S1(3), E.sub.S1(2)−E.sub.S1(3)<0.30 eV, E.sub.T1(1)>E.sub.T1(2)>E.sub.T1(3). Conc(1)>Conc(2)>Conc(3), Conc(3)≤20 wt %

The present invention relates to dinuclear metal complexes and to electronic devices, especially organic electroluminescent devices, comprising these metal complexes.

A compound of Ir(L.sub.A).sub.m(L.sub.B).sub.3-m, having a structure of Formula I,

##STR00001##

is provided. In Formula I, moieties A and B are each either a monocyclic ring or a polycyclic fused ring system; X.sup.1 to X.sup.4 and Z.sup.1 to Z.sup.4 are C or N; Y is a single atom linker, which can be substituted; each R.sup.1, R.sup.2, R.sup.3, R.sup.4, and R.sup.5 is hydrogen or a General Substituent; m is 1 or 2; at least one of R.sup.1, R.sup.2, and R.sup.3 comprises at least one first electron-withdrawing group; and at least one of R.sup.4 and R.sup.5 comprises at least one second electron-withdrawing group. Formulations, OLEDs, and consumer products containing the compound are also provided.

Provided is a light-emitting device including: a first electrode; a second electrode facing the first electrode; and an interlayer between the first electrode and the second electrode and including an emission layer, wherein the emission layer includes: a first emission layer including a first quantum dot and a p-type compound; and a second emission layer including a second quantum dot and an n-type compound, the second emission layer is in a direction of the first electrode, and the first electrode is a cathode.

The invention relates to a light emitting organic molecule, in particular for the application in optoelectronic devices. According to the invention, the organic molecule consists of a first chemical moiety with a structure of Formula I.

##STR00001##

and two second chemical moieties with a structure of Formula II,

##STR00002##

wherein
#represents the binding site of a single bond linking the first chemical moiety to the second chemical moiety;
exactly one substituent selected from the group consisting of W, X, and Y is cyanophenyl;
exactly one substituent selected from the group consisting of T, V and W represents the binding site of a single bond linking the first chemical moiety and one of the two second chemical moieties;
exactly one substituent selected from the group consisting of W, X, and Y is CN or CF.sub.3; and
exactly one substituent selected from the group consisting of T, V and W represents the binding site of a single bond linking the first chemical moiety and one of the two second chemical moieties.

A display device includes: a display panel having a non-folding area and a foldable area adjacent to the non-folding area; and a protective film disposed under the display panel, including a polyhedral oligomeric silsesquioxane (POSS) compound, and having a break elongation of about 20% or more.

A compound represented by the following general formula is an excellent light emitting material. R.sup.1 to R.sup.5 each represent a hydrogen atom, a deuterium atom, or a substituent other than a cyano group, but one or more of R.sup.1 to R.sup.5 is an aryl group or a pyridyl group, two or more of R.sup.1 to R.sup.5 are donor groups, and one or more of them are a substituted ring-fused indol-1-yl group (the number of rings constituting the fused ring is 4 or more).

A display device includes: a display panel having a non-folding area and a foldable area adjacent to the non-folding area; and a protective film disposed under the display panel, including a polyhedral oligomeric silsesquioxane (POSS) compound, and having a break elongation of about 20% or more.