US 12,114,520 B2
Organic light emitting device, and display apparatus, photoelectric conversion apparatus, electronic apparatus, illumination apparatus, and moving object including the same
Naoki Yamada, Inagi (JP); Satoru Shiobara, Hiratsuka (JP); and Jun Kamatani, Tokyo (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Apr. 29, 2020, as Appl. No. 16/862,317.
Claims priority of application No. 2019-087712 (JP), filed on May 7, 2019.
Prior Publication US 2020/0358021 A1, Nov. 12, 2020
Int. Cl. H10K 50/16 (2023.01); H01L 27/146 (2006.01); H10K 50/11 (2023.01); H10K 50/818 (2023.01); H10K 59/121 (2023.01); H10K 59/65 (2023.01); H10K 85/60 (2023.01); H10K 101/40 (2023.01)
CPC H10K 50/16 (2023.02) [H01L 27/14627 (2013.01); H10K 50/11 (2023.02); H10K 50/166 (2023.02); H10K 50/818 (2023.02); H10K 59/1213 (2023.02); H10K 59/65 (2023.02); H10K 85/657 (2023.02); H10K 85/615 (2023.02); H10K 85/622 (2023.02); H10K 85/626 (2023.02); H10K 85/654 (2023.02); H10K 85/6572 (2023.02); H10K 2101/40 (2023.02)] 25 Claims
OG exemplary drawing
 
1. An organic light emitting device comprising, in sequence, an anode, a light emitting layer, a first electron transport layer, a second electron transport layer, and a cathode,
wherein the second electron transport layer includes a first material and a second material different from the first material, and the first electron transport layer includes a third material and a fourth material different from the third material,
wherein the first material, the second material, the third material, and the fourth material satisfy the following conditions (a) and (b):
(a) |HOMO (first material)|>|HOMO (second material)|>|HOMO (fourth material)|
(b) |HOMO (first material)|>|HOMO (third material)|>|HOMO (fourth material)|
where HOMO (first material), HOMO (second material), HOMO (third material), and HOMO (fourth material) represent a value of highest occupied molecular orbital (HOMO) energy of the first material, a value of HOMO energy of the second material, a value of HOMO energy of the third material, and a value of HOMO energy of the fourth material, respectively.