US 12,490,653 B2
Organic light emitting diode
Yongbum Cha, Daejeon (KR); Boonjae Jang, Daejeon (KR); Sung Kil Hong, Daejeon (KR); and Sang Duk Suh, Daejeon (KR)
Assigned to LG CHEM, LTD., Seoul (KR)
Appl. No. 16/761,908
Filed by LG CHEM, LTD., Seoul (KR)
PCT Filed Jan. 28, 2019, PCT No. PCT/KR2019/001160
§ 371(c)(1), (2) Date Jul. 30, 2020,
PCT Pub. No. WO2019/151733, PCT Pub. Date Aug. 8, 2019.
Claims priority of application No. 10-2018-0013360 (KR), filed on Feb. 2, 2018.
Prior Publication US 2021/0050528 A1, Feb. 18, 2021
Int. Cl. H10K 85/60 (2023.01); C09K 11/06 (2006.01); H10K 85/10 (2023.01); H10K 50/16 (2023.01); H10K 50/17 (2023.01); H10K 50/18 (2023.01)
CPC H10K 85/654 (2023.02) [C09K 11/06 (2013.01); H10K 85/115 (2023.02); H10K 85/6572 (2023.02); H10K 85/6574 (2023.02); H10K 85/6576 (2023.02); H10K 50/16 (2023.02); H10K 50/171 (2023.02); H10K 50/18 (2023.02)] 12 Claims
OG exemplary drawing
 
1. An organic light emitting device, comprising:
a positive electrode;
a negative electrode provided to face the positive electrode;
a light emitting layer provided between the positive electrode and the negative electrode;
a first organic material layer provided between the negative electrode and the light emitting layer; and
a second organic material layer provided between the negative electrode and the first organic material layer,
wherein the first organic material layer is a hole blocking layer, and consists of a compound selected from among the following compounds:

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and
the second organic material layer is an electron injection layer, an electron transport layer, or a layer which simultaneously injects and transports electrons, and comprises a compound of the following Formula 3, and
wherein the second organic material layer is 2 times to 7 times thicker than the hole blocking layer:

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wherein in Formula 3:
at least one of X10 to X12 is N, and each remaining one is CH;
L4 is a divalent or trivalent aromatic hydrocarbon group having 6 to 30 carbon atoms;
L5 is a direct bond or an arylene group having 6 to 30 carbon atoms;
Ar7 and Ar8 are the same as or different from each other, and are each independently an aryl group having 6 to 30 carbon atoms; and
n1 is 1 or 2.