CPC H10K 50/11 (2023.02) [H10K 50/15 (2023.02); H10K 50/16 (2023.02); H10K 50/19 (2023.02); H10K 59/12 (2023.02); H10K 59/38 (2023.02); H10K 71/00 (2023.02); H10K 85/60 (2023.02); H10K 85/622 (2023.02); H10K 85/624 (2023.02); H10K 85/626 (2023.02); H10K 85/6572 (2023.02); H10K 85/6576 (2023.02); H10K 2101/10 (2023.02); H10K 2101/30 (2023.02); H10K 2101/40 (2023.02)] | 20 Claims |
1. An organic light-emitting diode, comprising:
a first electrode;
a light-emitting stack on the first electrode comprising, sequentially stacked on the first electrode:
a hole transport layer comprising a hole transport layer material;
a blue light-emitting layer in contact with the hole transport layer comprising:
a blue host material; and
a blue fluorescent dopant material; and
an electron transport layer comprising at least one an electron transport layer material; and
a second electrode on the light-emitting stack,
wherein the blue fluorescent dopant material has a higher LUMO (Lowest Unoccupied Molecular Orbital) energy level than the blue host material,
wherein the blue fluorescent dopant material has a higher HOMO (Highest Occupied Molecular Orbital) energy level than the blue host material,
wherein the blue fluorescent dopant material has a lower singlet energy than the blue host material,
wherein the hole transport layer material has a higher HOMO energy level than the blue host material,
wherein the hole transport layer material has a higher LUMO energy level than the blue host material,
wherein the hole transport layer material, at least the electron transport layer material, and the blue host material have the following triplet energy relationships: T1,BH<T1,HTL and T1,BH<T1,ETL, where T1,HTL, T1,ETL and T1,BH indicate triplet energies of the hole transport layer material, the electron transport layer material, and the blue host material, respectively, and
wherein the hole transport layer material comprises a tertiary amine-based material.
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