A quantum dot light-emitting device, a manufacturing method and a display device are provided. The quantum dot light-emitting device includes a substrate and a cathode arranged on the substrate; an electron transport layer arranged on one side of the cathode, away from the substrate, wherein the electron transport layer comprises a plurality of pixel regions; an adhesive layer arranged on one side of the electron transport layer, away from the cathode; a quantum dot film layer arranged on one side of the adhesive layer, away from the electron transport layer, wherein both the quantum dot film layer and the adhesive layer are located in the pixel regions; wherein the adhesive layer is respectively connected to the electron transport layer and the quantum dot film layer through at least one of chemical bonding and physical entanglement.

An organic electroluminescence device includes an anode, a cathode, a first emitting layer, and a second emitting layer provided between the first emitting layer and the cathode, in which the first emitting layer includes, as a first host material, a first compound that includes at least one group represented by a formula (11) below, the first compound being represented by a formula (1) below, the second emitting layer includes a second compound represented by a formula (2) below as a second host material, and the first emitting layer is in direct contact with the second emitting layer. L.sub.101 is a single bond or a substituted or unsubstituted arylene group having 6 to 50 ring carbon atoms. Ar.sub.101 is a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms. mx is 0, 1, 2, 3, 4, or 5.

##STR00001##

An organic light emitting device including a light emitting layer, which comprises a compound represented by Formula 1 and a compound represented by Formula 2.

##STR00001##

An organic electroluminescence device includes an anode, a cathode, and an emitting layer disposed between the anode and the cathode. The emitting layer comprises a delayed fluorescent compound M2 having at least one deuterium atom and a compound M3 having at least one deuterium atom. A singlet energy S.sub.1(M2) of the compound M2 and a singlet energy S.sub.1(M3) of the compound M3 satisfy the relationship S.sub.1(M3)>S.sub.1(M2).

The present invention relates to an organic electroluminescent device comprising a light-emitting layer B containing at least one host compound H of Formula (I) ##STR00001##
wherein each of X′.sub.1 and X′.sub.2 is independently from another selected from the group consisting of nitrogen and an optionally substituted carbon atom, and wherein at least one of R′.sub.1—R′.sub.10 is CN and at least one of R.sub.A—R.sub.E is a substituted silane residue.

An organic electroluminescence device includes a first electrode, a hole transport region on the first electrode, an emission layer on the hole transport region, the emission layer including a polycyclic compound, an electron transport region on the emission layer, and a second electrode on the electron transport region, wherein the polycyclic compound includes an isophthalonitrile derivative, a linker, and a nitrogen-containing group, the linker is a condensed cyclic group of three rings that are independently five-membered or six-membered rings, and each of the isophthalonitrile derivative and the nitrogen-containing group is substituted into a same ring of the linker.

A compound of Formula I: ##STR00001##
wherein Y is O, S, or Se;
wherein each X.sup.1-X.sup.14 is independently C or N;
wherein two consecutive X.sup.1-X.sup.14 in the same ring are not N;
wherein any of X.sup.1-X.sup.14 is C when it forms a direct bond to R.sup.A, R.sup.B, R.sup.C, or R.sup.D;
wherein R.sup.A, R.sup.B, R.sup.C, and R.sup.D each independently represent mono to the maximum allowable substitution, or no substitution;
wherein each R.sup.A, R.sup.B, R.sup.C, and R.sup.D is independently a hydrogen or a substituent selected from the group consisting of deuterium, halogen, alkyl, cycloalkyl, heteroalkyl, heterocycloalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carboxylic acid, ether, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof;
wherein R.sup.D represents mono to the maximum allowable substitution at least one R.sup.D is not hydrogen; and
wherein any two substituents are optionally joined or fused together to form a ring.

An organic electroluminescence device includes: an anode; a cathode; a first emitting layer; and a second emitting layer provided between the first emitting layer and the cathode, in which the first emitting layer contains, as a first host material, a first compound that has at least one group represented by a formula (11A) below and that is represented by a formula (1) below, the second emitting layer contains, as a second host material, a second compound represented by a formula (2) below, and the first emitting layer and the second emitting layer are in direct contact with each other

##STR00001##

An organic electroluminescence device includes: an anode; a cathode; a first emitting layer; and a second emitting layer provided between the first emitting layer and the cathode, in which the first emitting layer contains, as a first host material, a first compound that has at least one group represented by a formula (11) below and that is represented by a formula (1) below, the second emitting layer contains, as a second host material, a second compound represented by one of formulae (2-1A) to (2-4A) below, and the first emitting layer and the second emitting layer are in direct contact with each other.

##STR00001## ##STR00002##

Provided are a condensed cyclic compound, a light-emitting device including the same, and an electronic apparatus including the light-emitting device. The light-emitting device includes a first electrode, a second electrode facing the first electrode, an interlayer disposed between the first electrode and the second electrode and including an emission layer, and at least one condensed cyclic compound, which is represented by Formula 1, which is defined in the specification:

##STR00001##