CPC H10K 85/342 (2023.02) [H10K 50/11 (2023.02); H10K 50/13 (2023.02); H10K 50/16 (2023.02); H10K 85/622 (2023.02); H10K 85/631 (2023.02); H10K 85/633 (2023.02); H10K 85/6572 (2023.02); H10K 85/6576 (2023.02); H10K 2101/10 (2023.02); H10K 2101/27 (2023.02); H10K 2101/30 (2023.02); H10K 2101/90 (2023.02)] | 19 Claims |
1. A light-emitting device comprising:
a first light-emitting element comprising a first light-emitting layer; and
a second light-emitting element comprising a second light-emitting layer,
wherein the first light-emitting element and the second light-emitting element comprise an electron-transport layer,
wherein the first light-emitting layer comprises a first phosphorescent material, a first organic material and a second organic material,
wherein the second light-emitting layer comprises a fluorescent material and a third organic material,
wherein the electron-transport layer comprises a fourth organic material,
wherein the first light-emitting layer and the second light-emitting layer are each in contact with the electron-transport layer positioned on a cathode side,
wherein a triplet excitation energy of the fourth organic material is lower than a triplet excitation energy of the first organic material,
wherein the first organic material and the second organic material form an exciplex,
wherein the second organic material comprises a carbazole skeleton, and
wherein the fourth organic material comprises a first anthracene derivative.
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