The present disclosure relates to the field of organic light-emitting materials, and more particularly, to a thermally activated delayed fluorescence material having red, green, or blue color, a synthesis method thereof, and application thereof. The thermally activated delayed fluorescence material having red, green, or blue color has the following structural formula: ##STR00001## the present disclosure provides a novel thermally activated delayed fluorescence material having red, green, or blue color which has a lower singlet triplet energy level difference, a high RISC rate constant (kRISC), and a high photoluminescence quantum yield (PLQY). It has significant characteristics of a thermally activated delayed fluorescence material and a long service life that can be used in an electroluminescent display and a light-emitting equipment structure which are mass produced.

An object of the present invention is to provide an organic electroluminescent element having optimal light emitting characteristics. The above problem is solved by an organic electroluminescent element having a light emitting layer containing a compound of formula (1) or a multimer compound having a plurality of structures of formula (1) and a compound of formula (2).

##STR00001##

(In formula (1), ring A, ring B, and ring C each represent an aryl ring or the like, X.sup.1 and X.sup.2 each independently represent O or N—R, and the R represents an aryl or the like. In formula (2), R.sup.1 to R.sup.10 each represent an aryl or the like.)

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##

Provided is an organic light emitting device including: a first electrode; a second electrode; and an organic material layer having one or more layers provided between the first electrode and the second electrode, in which the organic material layer includes a light emitting layer including a compound of Chemical Formula 1 and a compound of Chemical Formula 2:

##STR00001##

Provided is an organic light emitting device including: a first electrode; a second electrode; and an organic material layer having one or more layers provided between the first electrode and the second electrode, in which the organic material layer includes a light emitting layer including a compound of Chemical Formula 1 and a compound of Chemical Formula 2:

##STR00001##

A material for an organic electroluminescent device that is excellent in hole injection and transport abilities, electron blocking ability, stability in a thin film state, and durability is provided as a material for an organic electroluminescent device having high efficiency and high durability. Further, an organic electroluminescent device having low driving voltage, high efficiency, and a long lifetime is provided by combining the material with various materials for an organic EL device that is excellent in hole and electron injection and transport abilities, electron blocking ability, thin film stability, and durability, in such a manner that the characteristics of the materials can be effectively exhibited. An organic electroluminescent device comprising at least an anode, a hole transport layer, a light emitting layer, an electron transport layer, and a cathode in this order, wherein the hole transport layer comprises an arylamine compound of the following general formula (1). ##STR00001##

A material for an organic electroluminescent device that is excellent in hole injection and transport abilities, electron blocking ability, stability in a thin film state, and durability is provided as a material for an organic electroluminescent device having high efficiency and high durability. Further, an organic electroluminescent device having low driving voltage, high efficiency, and a long lifetime is provided by combining the material with various materials for an organic EL device that is excellent in hole and electron injection and transport abilities, electron blocking ability, thin film stability, and durability, in such a manner that the characteristics of the materials can be effectively exhibited. An organic electroluminescent device comprising at least an anode, a hole transport layer, a light emitting layer, an electron transport layer, and a cathode in this order, wherein the hole transport layer comprises an arylamine compound of the following general formula (1). ##STR00001##

The invention relates to an organic molecule, in particular for use in organic optoelectronic devices. According to the invention, the organic molecule has a structure of Formula I ##STR00001##
wherein
Q is at each occurrence N or CR.sup.III;
W is at each occurrence N or CR.sup.IV;
Z is at selected from the group consisting of a direct bond, CR.sup.3R.sup.4, C═CR.sup.3R.sup.4, C═O, C═NR.sup.3, NR.sup.3, O, SiR.sup.3R.sup.4, S, S(O) and S(O).sub.2;
R.sup.A is selected from the group consisting of CN and CF.sub.3; and
wherein exactly one Q and exactly one W is N.

A compound is represented by a formula (1) below, in which k is an integer of 0 or more, m is an integer of 1 or more, n is an integer of 2 or more. L is a substituted or unsubstituted aromatic hydrocarbon ring having 6 to 30 ring carbon atoms, CN is a cyano group, and D.sub.1 and D.sub.2 are each independently represented by one of a formula (2), a formula (3) and formula (3x) below, D.sub.1 and D.sub.2 being optionally mutually the same or different.

##STR00001##

A compound is represented by a formula (2) below and has at least one group represented by a formula (20) below. In the formula (2): m is 0, 1, 2, or 3, n is 0, 1, 2 or 3, and m+n is an integer of 1 or more.

##STR00001##