US 12,239,016 B2
Organic light emitting element
Woochul Lee, Daejeon (KR); Ki Dong Koo, Daejeon (KR); Ji Young Choi, Daejeon (KR); Young Seok Kim, Daejeon (KR); Joo Ho Kim, Daejeon (KR); Kongkyeom Kim, Daejeon (KR); Dongheon Kim, Daejeon (KR); Younghee Lee, Daejeon (KR); Ki Kon Lee, Daejeon (KR); Sujeong Geum, Daejeon (KR); and Jung Min Yoon, Daejeon (KR)
Assigned to LG CHEM, LTD., Seoul (KR)
Appl. No. 16/639,055
Filed by LG CHEM, LTD., Seoul (KR)
PCT Filed Sep. 18, 2018, PCT No. PCT/KR2018/010980
§ 371(c)(1), (2) Date Feb. 13, 2020,
PCT Pub. No. WO2019/059611, PCT Pub. Date Mar. 28, 2019.
Claims priority of application No. 10-2017-0120525 (KR), filed on Sep. 19, 2017.
Prior Publication US 2020/0373496 A1, Nov. 26, 2020
Int. Cl. H10K 85/60 (2023.01); C09K 11/06 (2006.01); H10K 85/40 (2023.01)
CPC H10K 85/654 (2023.02) [H10K 85/40 (2023.02); H10K 85/622 (2023.02); H10K 85/626 (2023.02); H10K 85/631 (2023.02); H10K 85/6574 (2023.02); H10K 85/6576 (2023.02); C09K 11/06 (2013.01)] 13 Claims
 
1. An organic light emitting device comprising:
an anode;
a cathode; and
a light emitting layer provided between the anode and the cathode,
wherein the light emitting layer comprises a first host material comprising a compound of the following Chemical Formula A, a second host material comprising a compound of the following Chemical Formula B, and a dopant material comprising a compound of the following Chemical Formula C or D:

OG Complex Work Unit Chemistry
wherein in Chemical Formula A:
Ar1 to Ar3 are the same as or different from each other, and each independently is one of the following Chemical Formula 17 or 18:

OG Complex Work Unit Chemistry
wherein in Chemical Formulae 17 and 18:
custom character is a site bonding to one of L1 to L3;
Y is a direct bond, O, S, Se, Ge, NR, PR, SiRR′ or CRR′, n is 0 or 1, and when n is 0, hydrogen bonds to each of two positions to which Y bonds;
R, R′, R1, R2, R2′ and R2″ are the same as or different from each other, and each independently is hydrogen, deuterium, a halogen group, a hydroxyl group, a silyl group, a nitrile group, a nitro group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted arylamine group, a substituted or unsubstituted alkylamine group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclic group, or bond to adjacent groups to form a substituted or unsubstituted ring;
a is an integer of 0 to 3, and when a is 2 or greater, the R1s are the same as or different from each other;
b, b′ and b″ are an integer of 0 to 4, and when b, b′ or b″ is 2 or greater, the R2s, R2's or R2″s are the same as or different from each other;
R1′ is hydrogen, deuterium, a halogen group, a hydroxyl group, a silyl group, a nitrile group, a nitro group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted arylamine group, a substituted or unsubstituted alkylamine group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclic group;
a′ is an integer of 0 to 3, and when a′ is 2 or greater, the R1's are the same as or different from each other; and
L1 to L3 are the same as or different from each other, and each independently is a direct bond, a substituted or unsubstituted arylene group, or a substituted or unsubstituted divalent heterocyclic group;

OG Complex Work Unit Chemistry
wherein in Chemical Formula B:
(a) Ar4 to Ar7 are the same as or different from each other, and each independently is hydrogen, an aryl group, or a substituted or unsubstituted tetracyclic or higher heterocyclic group, wherein at least one of Ar4 and Ar6 is a substituted or unsubstituted tetracyclic or higher heterocyclic group; and L4 to L7 are the same as or different from each other, and each independently is a direct bond, a substituted or unsubstituted arylene group, or a substituted or unsubstituted divalent heterocyclic group; or
(b) Ar4 to Ar7 are the same as or different from each other, and each independently is hydrogen, an unsubstituted aryl group, or a substituted or unsubstituted tetracyclic or higher heterocyclic group; and L4 to L7 are the same as or different from each other, and each independently is a direct bond, a phenylene group or a naphthylene group;

OG Complex Work Unit Chemistry
wherein in Chemical Formula C:
Ara to Arc are the same as or different from each other, and each independently is a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclic group;
La to Lc are the same as or different from each other, and each independently is a direct bond, a substituted or unsubstituted arylene group, or a substituted or unsubstituted divalent heterocyclic group; and
z is an integer of 1 to 3, and when z is an integer of 2 or greater, structures in the parentheses are the same as or different from each other;

OG Complex Work Unit Chemistry
wherein in Chemical Formula D:
Ard to Arf are the same as or different from each other, and each independently is a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclic group, or adjacent groups bond to each other to form a substituted or unsubstituted ring; and
Ld to Lf are the same as or different from each other, and each independently is a direct bond, a substituted or unsubstituted arylene group, or a substituted or unsubstituted divalent heterocyclic group.