US 12,376,448 B2
Light-emitting device, light-emitting apparatus, light-emitting module, electronic device, and lighting device
Ryohei Yamaoka, Kanagawa (JP); Naoaki Hashimoto, Kanagawa (JP); Tsunenori Suzuki, Kanagawa (JP); and Satoshi Seo, Kanagawa (JP)
Assigned to Semiconductor Energy Laboratory Co., Ltd., Atsugi (JP)
Appl. No. 17/598,549
Filed by SEMICONDUCTOR ENERGY LABORATORY CO., LTD., Atsugi (JP)
PCT Filed Apr. 1, 2020, PCT No. PCT/IB2020/053071
§ 371(c)(1), (2) Date Sep. 27, 2021,
PCT Pub. No. WO2020/208474, PCT Pub. Date Oct. 15, 2020.
Claims priority of application No. 2019-076244 (JP), filed on Apr. 12, 2019.
Prior Publication US 2022/0173347 A1, Jun. 2, 2022
Int. Cl. H10K 50/16 (2023.01); H10K 50/11 (2023.01); H10K 50/15 (2023.01); H10K 50/17 (2023.01); H10K 85/60 (2023.01); H10K 101/40 (2023.01)
CPC H10K 50/16 (2023.02) [H10K 50/11 (2023.02); H10K 50/15 (2023.02); H10K 50/171 (2023.02); H10K 85/626 (2023.02); H10K 85/6572 (2023.02); H10K 2101/40 (2023.02)] 22 Claims
OG exemplary drawing
 
1. A light-emitting device comprising:
a first electrode, a first light-emitting layer, a first layer, a second layer, a third layer, a second light-emitting layer, and a second electrode stacked in this order,
wherein the first layer comprises a first organic compound and a first substance,
wherein the second layer comprises a second organic compound,
wherein the third layer comprises a second substance,
wherein the first organic compound is an electron-transport material,
wherein the first organic compound has a HOMO level higher than or equal to −6.0 eV,
wherein the first substance is a metal, a metallic salt, a metal oxide, or an organometallic salt,
wherein the second organic compound is an electron-transport material,
wherein the second substance comprises an alkali metal, an alkaline earth metal, or a rare earth metal, and
wherein the second layer has a lower concentration of the first substance than the first layer.