CPC H10K 50/11 (2023.02) [H10K 50/15 (2023.02); H10K 50/16 (2023.02); H10K 50/17 (2023.02); H10K 85/30 (2023.02); H10K 85/342 (2023.02); H10K 85/615 (2023.02); H10K 85/622 (2023.02); H10K 85/626 (2023.02); H10K 85/636 (2023.02); H10K 85/657 (2023.02); H10K 85/6572 (2023.02); H10K 85/6574 (2023.02); H10K 85/6576 (2023.02); H10K 2101/10 (2023.02); H10K 2101/30 (2023.02); H10K 2101/40 (2023.02)] | 26 Claims |
1. A light-emitting device comprising:
an anode;
a cathode; and
an EL layer between the anode and the cathode,
wherein the EL layer comprises a first layer, a second layer, a third layer, a light-emitting layer, and a fourth layer in this order from an anode side,
wherein the first layer is in contact with the anode,
wherein the fourth layer is in contact with the light-emitting layer,
wherein the first layer comprises a first organic compound and a second organic compound,
wherein the second layer comprises a third organic compound,
wherein the third layer comprises a fourth organic compound,
wherein the light-emitting layer comprises a fifth organic compound and a sixth organic compound,
wherein the fourth layer comprises a seventh organic compound and an eighth substance,
wherein the first organic compound exhibits an electron-accepting property with respect to the second organic compound,
wherein the fifth organic compound is an emission center substance,
wherein a HOMO level of the second organic compound is higher than or equal to −5.7 eV and lower than or equal to −5.4 eV, and
wherein the eighth substance is an organic complex.
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