A thermoelectric conversion material containing an electrically conductive material (A) and an organic compound (B) that are in a relationship satisfying the following formula (1): 0 eV≤|(HOMO of the organic compound (B))−(HOMO of the electrically conductive material (A))|≤1.64 eV.

A composition for manufacturing an organic electronic device includes at least three organic functional materials H1, H2, and H3, and at least one organic solvent. The organic functional materials H1 and H2 can form a type II semiconductor heterojunction structure. A LUMO value of the organic functional material H3 is greater than or equal to that of the organic functional materials H1 and H2, and a HOMO value thereof is less than or equal to that of the organic functional materials H1 and H2.

The present disclosure provides a method for preparing a deuterated organic compound in good yield even though a reduced amount of benzene-D6 is used by using a solvent comprising a benzene-based compound not substituted with deuterium or partially substituted with deuterium.

The present disclosure provides a method for preparing a deuterated organic compound in good yield even though a reduced amount of benzene-D6 is used by using a solvent comprising a benzene-based compound not substituted with deuterium or partially substituted with deuterium.

An organic electroluminescence device including: a cathode; an anode; and at least one emitting layer disposed between the cathode and the anode, wherein the emitting layer contains a first host material, a second host material, and a dopant material, wherein the first host material is a compound represented by the following formula (1), the second host material is a compound represented by the following formula (2), and the first host material and the second host material are different compounds.

##STR00001##

An organic compound is disclosed comprising: a first chemical moiety with a structure of formula I

##STR00001##

and two second chemical moieties, independently from another with a structure of formula II,

##STR00002##

wherein the first chemical moiety is linked to each of the two second chemical moieties via a single bond.

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).

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 bisbenzofuran-fused 2,8-diaminoindeno[1,2-b]fluorene derivatives and related compounds of formula (1) as materials for organic electroluminescent devices (OLEDs).

The present invention relates to bisbenzofuran-fused 2,8-diaminoindeno[1,2-b]fluorene derivatives and related compounds of formula (1) as materials for organic electroluminescent devices (OLEDs).