US 11,991,926 B2
Organic electroluminescent device
Inbum Song, Seoul (KR); Seunghee Yoon, Seoul (KR); Sunghoon Kim, Seoul (KR); Seong-Min Park, Seoul (KR); Tae Wan Lee, Seoul (KR); Jae Ho Jeong, Incheon (KR); and Jiwoong Yoo, Seoul (KR)
Assigned to LG DISPLAY CO., LTD., Seoul (KR)
Filed by LG DISPLAY CO., LTD., Seoul (KR)
Filed on Apr. 16, 2020, as Appl. No. 16/850,370.
Claims priority of application No. 10-2019-0044980 (KR), filed on Apr. 17, 2019.
Prior Publication US 2020/0335705 A1, Oct. 22, 2020
Int. Cl. H01L 51/54 (2006.01); H10K 85/30 (2023.01); H10K 85/60 (2023.01); H10K 50/11 (2023.01); H10K 50/15 (2023.01)
CPC H10K 85/6572 (2023.02) [H10K 85/322 (2023.02); H10K 85/615 (2023.02); H10K 85/631 (2023.02); H10K 85/633 (2023.02); H10K 85/6574 (2023.02); H10K 85/6576 (2023.02); H10K 50/11 (2023.02); H10K 50/15 (2023.02)] 17 Claims
 
1. An organic electroluminescent device including:
a first electrode,
one or more organic material layers including one or more layers containing a compound represented by Chemical Formula 1, the one or more organic material layers including:
a hole injection layer including 1,4,5,8,9,11-hexaazatriphenylene-hexacarbonitrile,
a hole transport layer including N4,N4,N4′,N4′-tetra([1,1′-biphenyl]-4-yl)-[1,1′-biphenyl]-4,4′-diamine,
an auxiliary hole transport layer including the compound represented by Chemical Formula 1,
an electron transport layer including LiQ,
an electron injection layer including LiQ, and
a light emitting layer containing:
a blue light emitting host that includes 9,10-bis(2-naphthyl)anthracene (ADN), and
a compound represented by Chemical Formula 2 that is a dopant doped into the host, and
a second electrode,
wherein the Chemical Formula 1 and the Chemical Formula 2 are:

OG Complex Work Unit Chemistry
where in the Chemical Formula 1,
each of L1 to L3 independently represents a substituted or unsubstituted C6 to C30 arylene group,
each of Ar1 and Ar2 independently represents one selected from the group consisting of a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C3 to C30 heteroaryl group, and a substituted or unsubstituted C3 to C20 cycloalkyl group,
each of R1 and R2 independently represents hydrogen,
each of k and l independently denotes an integer from 0 to 4,

OG Complex Work Unit Chemistry
where in the Chemical Formula 2,
Y is B,
each of X1 and X2 independently represents N(R12),
R3 to R12 are the same as or different from each other, and each of R3 to R12 independently represents one selected from the group consisting of hydrogen, a substituted or unsubstituted C1 to C20 alkyl group, an unsubstituted C3 to C30 cycloalkyl group, a substituted or unsubstituted C7 to C30 aralkyl group, a substituted or unsubstituted C6 to C30 aryl group, and a substituted or unsubstituted C6 to C30 arylamino group, wherein adjacent two of R3 to R12 are optionally coupled to each other to form a substituted or unsubstituted ring.