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US 2020/0052221 A1Published application
Organic electroluminescent device
OwnerTae-Jin LEE, Sang-Hee CHO +2inventors
InventorsTae-Jin LEE, Sang-Hee CHO, Bitnari KIM, Young-Jun CHO
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Abstract
The present disclosure relates to an organic electroluminescent device. The organic electroluminescent device of the present disclosure can exhibit high efficiency and/or long lifespan by comprising at least specific combination of a light-emitting layer and a hole transport zone.
Claims10
An organic electroluminescent device comprising a first electrode;
- a second electrode facing the first electrode;
- a light-emitting layer between the first electrode and the second electrode;
- a hole transport zone comprising a plurality of hole transport layers between the first electrode and the light-emitting layer;
- and an electron transport zone between the light-emitting layer and the second electrode, wherein the light-emitting layer comprises quinoxaline derivatives, and wherein a hole transport layer adjacent to the light-emitting layer among the plurality of hole transport layers comprises a compound(s) having HOMO and LUMO energy levels satisfied by the following Equations 1 and 2, respectively.
- −5.0 eV≤HOMO≤−4.7 eV (1)
- LUMO≤−1.0 eV (2)
3 more elements
Dependencies are inferred from the claim text.