Organic compounds for organic light-emitting diode and organic light-emitting diode including the same

1. An organic luminescent compound, represented by the following Chemical Formula A:

wherein,

R1 to R5 are the same or different and are each independently any one selected from among a hydrogen, a deuterium, a substituted or unsubstituted alkyl of 1 to 30 carbon atoms, a substituted or unsubstituted cycloalkyl of 3 to 30 carbon atoms, a substituted or unsubstituted aryl of 6 to 50 carbon atoms, a substituted or unsubstituted heteroaryl of 2 to 50 carbon atoms bearing O, N, or S as a heteroatom, a cyano, a nitro, a halogen, and a substituted or unsubstituted silyl of 1 to 30 carbon atoms,

wherein each of unsubstituted carbon atoms of R1 to R5 is bound with a hydrogen atom or a deuterium atom,

linker L is a single bond, or a substituted or unsubstituted arylene of 6 to 60 carbon atoms;

k is an integer of 1 to 5,

l to n are the same or different and are each independently an integer of 1 to 4,

o is an integer of 1 to 3,

with the proviso that when k to o are each an integer of 2 or greater, corresponding R1's to R5's are individually the same or different, and

“***” of X denotes a bonding site to be linked to linker L,

wherein

R1 in Chemical Formula A is a deuterium and k is 5, or

R4 and/or R5 in Chemical Formula A is a deuterium, and n is 2 or greater, or o is 2 or greater,

wherein the term ‘substituted’ in the expression ‘substituted or unsubstituted’ used in Chemical Formula A means having at least one substituent selected from the group consisting of a deuterium, a cyano, a halogen, a nitro, an alkyl of 1 to 24 carbon atoms, a halogenated alkyl of 1 to 24 carbon atoms, an aryl of 6 to 24 carbon atoms, an arylalkyl of 7 to 24 carbon atoms, an alkylsilyl of 1 to 24 carbon atoms, and an arylsilyl of 6 to 24 carbon atoms.

2. The organic luminescent compound as set forth in claim 1 , wherein the linker L is a single bond or one selected from among compounds represented by the following Structural Formulas 1 and 2:

wherein each of the unsubstituted carbon atoms of the aromatic ring moiety may be bound with a hydrogen atom or a deuterium atom.

3. The organic luminescent compound as set forth in claim 1 , wherein R2 and/or R3 is a deuterium, and 1 is 2 or greater, or m is 2 or greater.

4. The organic luminescent compound as set forth in claim 1 , wherein the organic luminescent compound is any one selected from among compounds represented by the following Chemical Formulas 1 to 99, 130 to 132, 134, 136, and 138:

5. An organic light-emitting diode comprising:

a first electrode;

a second electrode facing the first electrode; and

an organic layer interposed therebetween, wherein the organic layer contains at least one organic luminescent compound of any one of claim 1 .

6. The organic light-emitting diode as set forth in claim 5 , wherein the organic layer comprises at least one of a hole injecting layer, a hole transport layer, a functional layer capable of both hole injection and hole transport, a light-emitting layer, an electron transport layer, and an electron injecting layer.

7. The organic light-emitting diode as set forth in claim 6 , wherein the organic layer interposed between the first electrode and the second electrode is a light-emitting layer composed of a host and a dopant, the organic luminescent compound serving as the host.

8. The organic light-emitting diode as set forth in claim 6 , wherein at least one selected from among the layers is deposited using a single-molecule deposition process or a solution process.

9. The organic light-emitting diode as set forth in claim 5 , wherein the organic light-emitting diode is used for a device selected from among a flat display device, a flexible display device, a monochrome or grayscale flat illumination device, and a monochrome or grayscale flexible illumination device.