US 12,410,180 B2
Light-emitting device, light-emitting apparatus, electronic device, and lighting device
Satoshi Seo, Kanagawa (JP); Toshiki Sasaki, Kanagawa (JP); Shogo Uesaka, Kanagawa (JP); and Shiho Nomura, Kanagawa (JP)
Assigned to Semiconductor Energy Laboratory Co., Ltd., (JP)
Appl. No. 17/264,909
Filed by Semiconductor Energy Laboratory Co., Ltd., Kanagawa-ken (JP)
PCT Filed Jul. 25, 2019, PCT No. PCT/IB2019/056350
§ 371(c)(1), (2) Date Feb. 1, 2021,
PCT Pub. No. WO2020/026088, PCT Pub. Date Jun. 2, 2020.
Claims priority of application No. 2018-147134 (JP), filed on Aug. 3, 2018.
Prior Publication US 2021/0313520 A1, Oct. 7, 2021
Int. Cl. C07D 491/048 (2006.01); C07D 519/00 (2006.01); H10K 50/11 (2023.01); H10K 50/16 (2023.01); H10K 59/80 (2023.01); H10K 85/60 (2023.01); H10K 101/00 (2023.01); H10K 101/10 (2023.01); H10K 102/00 (2023.01)
CPC C07D 491/048 (2013.01) [C07D 519/00 (2013.01); H10K 85/657 (2023.02); H10K 85/6572 (2023.02); H10K 85/6574 (2023.02); H10K 85/6576 (2023.02); H10K 50/11 (2023.02); H10K 50/166 (2023.02); H10K 59/87 (2023.02); H10K 2101/10 (2023.02); H10K 2101/90 (2023.02); H10K 2102/351 (2023.02)] 18 Claims
OG exemplary drawing
 
1. A light-emitting device comprising an electroluminescent layer between an anode and a cathode,
wherein the electroluminescent layer comprises:
a first layer;
a second layer between the first layer and the cathode and in contact with the first layer;
a third layer between the second layer and the cathode and in contact with the second layer; and
a fourth layer between the cathode and the third layer and in contact with the third layer and the cathode,
wherein the second layer has a largest thickness in the electroluminescent layer,
wherein the second layer comprises a light-emitting substance, a first organic compound and a second organic compound,
wherein the first layer comprises the first organic compound,
wherein the third layer comprises a third organic compound,
wherein the fourth layer comprises a compound comprising an alkali metal,
wherein the third organic compound is different from the first organic compound and the second organic compound,
wherein the second organic compound has a structure in which an aromatic ring is fused to a furan ring of a furodiazine skeleton, and
wherein the second layer is a light-emitting layer.