Granted Patent B2

US 12,685,007 · App. 17/958,683 · Granted Jul 14, 2026

Inventors: Jae-Min Moon (Paju-si, KR); In-Bum Song (Paju-si, KR); Do-Han Kim (Paju-si, KR); Sung-Jin Park (Paju-si, KR)

Assignee: LG DISPLAY CO., LTD.

H10K85/342C07F15/0033C09K11/06C09K2211/1029C09K2211/185H10K50/131H10K2101/90

Abstract

Claims (55)

1 . An organic light emitting diode, comprising:

a first electrode;

a second electrode facing the first electrode; and

a first emitting part including a first red emitting material layer and positioned between the first and second electrodes,

wherein the first red emitting material layer includes a first compound and a second compound,

wherein the first compound is represented by Formula 1-1:

wherein

M is iridium (Ir);

R is an unsubstituted or substituted C 1 -C 20 alkyl group,

wherein each of X 21 to X 27 is independently CR 1 ,

wherein Y 3 is CR 2 R 3 ,

each of R 1 to R 3 is independently hydrogen, an unsubstituted or substituted C 1 -C 20 alkyl group or an unsubstituted or substituted C 6 -C 30 aromatic group,

optionally,

two adjacent R 1 of X 25 to X 27 form an unsubstituted or substituted C 6 -C 30 aromatic ring;

is an auxiliary ligand; wherein Z 1 and Z 2 are independently selected from the group consisting of an oxygen atom, a nitrogen atom, and a phosphorus atom;

m is an integer of 1 to 3;

n is an integer of 0 to 2; and

m+n is an oxidation number of M,

wherein the second compound is represented by Formula 2-1:

wherein

each of X and Y is independently selected from the group consisting of an unsubstituted or substituted C 6 -C 30 aryl group,

R 4 is selected from the group consisting of an unsubstituted or substituted C 1 -C 20 alkyl group and an unsubstituted or substituted C 6 -C 30 aryl group,

a1 is an integer of 0,

L 1 is selected from the group consisting of an unsubstituted or substituted C 6 -C 30 arylene group, and

a2 is 1.

2 . The organic light emitting diode of claim 1 , wherein Formula 1-1 is represented by Formula 1-4:

wherein each of X 41 to X 45 is independently CR 1 , and

wherein each of M, R,

 m, n, and R 1 to R 3 , X 21 to X 24 and Y 3 is same as defined in Formula 1-1.

3 . The organic light emitting diode of claim 1 , wherein Formula 1-1 is represented by Formula 1-8:

wherein R in Formulas 1-8 is same as defined in Formula 1-1,

wherein each of X 21 to X 24 and X 41 to X 45 is independently CR 1 ,

wherein Y 3 is CR 2 R 3 ,

wherein each of R 1 to R 3 is same as defined in Formula 1-1,

wherein each of R 11 to R 13 is independently selected from the group consisting of hydrogen and an unsubstituted or substituted C 1 -C 20 alkyl group,

wherein m is an integer of 1 to 3, and n is an integer of 0 to 2, and

wherein m+n is 3.

4 . The organic light emitting diode of claim 1 , wherein a weight % of the second compound is greater than a weight % of the first compound.

5 . The organic light emitting diode of claim 1 , further comprising:

a second emitting part including a second red emitting material layer and positioned between the first emitting part and the second electrode; and

a charge generation layer positioned between the first and second emitting parts.

6 . The organic light emitting diode of claim 5 , wherein the second emitting material layer includes a fourth compound represented by Formula 1-1 and a fifth compound represented by Formula 2-1.

7 . The organic light emitting diode of claim 1 , further comprising:

a second emitting part including a first blue emitting material layer and positioned between the first electrode and the first emitting part; and

a first charge generation layer positioned between the first and second emitting parts.

8 . The organic light emitting diode of claim 7 , further comprising:

a third emitting part including a second blue emitting material layer and positioned between the first emitting part and the second electrode; and

a second charge generation layer positioned between the first and third emitting parts.

9 . The organic light emitting diode of claim 8 , wherein the first emitting part further includes a green emitting material layer positioned between the red emitting material layer and the second charge generation layer.

10 . The organic light emitting diode of claim 9 , wherein the first emitting part further includes a yellow-green emitting material layer positioned between the red and green emitting material layers.

11 . An organic light emitting device, comprising:

a substrate;

the organic light emitting diode of claim 1 positioned on the substrate.

12 . The organic light emitting diode of claim 1 , wherein the first compound is one of the following compounds:

13 . The organic light emitting diode of claim 1 , wherein the second compound is the following compound:

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (21)