CPC H10K 50/131 (2023.02) [H10K 50/11 (2023.02); H10K 50/15 (2023.02); H10K 50/19 (2023.02); H10K 59/38 (2023.02); H10K 59/12 (2023.02); H10K 85/342 (2023.02); H10K 85/654 (2023.02); H10K 2101/10 (2023.02); H10K 2101/27 (2023.02); H10K 2101/30 (2023.02); H10K 2101/40 (2023.02); H10K 2101/90 (2023.02)] | 20 Claims |
1. A white organic light emitting element comprising:
a first electrode and a second electrode opposite each other; and
at least one blue light emitting stack and a phosphorescent light emitting stack provided between the first electrode and the second electrode and separated from each other by a charge generation layer,
wherein the phosphorescent light emitting stack comprises a hole transport layer, a red light emitting layer for emitting a single red color on the hole transport layer, a green light emitting layer on the red light emitting layer, and an electron transport layer on the green light emitting layer,
wherein the red light emitting layer comprises a red dopant and red hosts,
wherein the hole transport layer is positioned between the charge generation layer and the red light emitting layer, and
wherein the red dopant has a highest occupied molecular orbital (HOMO) energy level lower than a HOMO energy level of the hole transport layer, and higher than a HOMO energy level of the red hosts.
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