US 11,950,440 B2
Organic light emitting device
Jaegoo Lee, Daejeon (KR); Dongkeun Song, Daejeon (KR); Jiyoung Noh, Daejeon (KR); Yongbum Cha, Daejeon (KR); and Woochul Lee, Daejeon (KR)
Assigned to LG CHEM, LTD., Seoul (KR)
Appl. No. 17/294,277
Filed by LG CHEM, LTD., Seoul (KR)
PCT Filed Jan. 17, 2020, PCT No. PCT/KR2020/000878
§ 371(c)(1), (2) Date May 14, 2021,
PCT Pub. No. WO2020/159128, PCT Pub. Date Aug. 6, 2020.
Claims priority of application No. 10-2019-0010603 (KR), filed on Jan. 28, 2019; and application No. 10-2020-0002772 (KR), filed on Jan. 8, 2020.
Prior Publication US 2022/0006063 A1, Jan. 6, 2022
Int. Cl. H10K 50/15 (2023.01); H10K 50/11 (2023.01); H10K 101/40 (2023.01)
CPC H10K 50/15 (2023.02) [H10K 50/11 (2023.02); H10K 2101/40 (2023.02)] 9 Claims
OG exemplary drawing
 
1. An organic light emitting device comprising:
an anode;
a hole transport layer comprising a compound of Chemical Formula 1:

OG Complex Work Unit Chemistry
wherein:
R1 and R2 are each independently: hydrogen or a substituted or unsubstituted C6-60aryl:
Ar1 is phenyl, biphenyl-2-yl, biphenyl-4-yl, naphthyl, phenanthrenyl, or naphthyl phenyl; and
Ar2 is phenyl, biphenyl-4-yl, naphthyl, phenanthrenyl, naphthyl phenyl, phenanthrenyl phenyl, 9,9-dimethyl-9H-fluorenyi, 9,9-diphenyl-9H-fluorenyl, 9,9′-spirobifluorenyl,

OG Complex Work Unit Chemistry
a light emitting layer; and
a cathode,
wherein the light emitting layer includes a host and a dopant, and
wherein a difference between a dipole moment value of the compound of Chemical Formula 1 included in the hole transport layer and a dipole moment value of the host in the light emitting layer is 1.0 to 2.0.