Organic electroluminescence device
AssigneeSamsung Display Co., Ltd.
InventorHiroaki ITOI
Life of this patent
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Abstract
An organic electroluminescent (EL) device including an anode; an emission layer for obtaining luminescence via a singlet excited state; and a laminated structure between the anode and the emission layer, the laminated structure including at least three layers having different components, wherein the laminated structure includes a first layer including a hole transport compound, the hole transport compound being obtained by doping an electron accepting compound having a lowest unoccupied molecular orbital (LUMO) level of about −9.0 eV to about −4.0 eV; and a second layer between the first layer and the emission layer, the second layer being closer to the emission layer than the first layer and including a compound represented by the following Formula 1:
Claims13
An organic electroluminescent (EL) device, comprising:
- an anode;
- an emission layer for obtaining luminescence via a singlet excited state;
- and
- a laminated structure between the anode and the emission layer, the laminated structure including at least three layers having different components,
- wherein the laminated structure includes:
- a first layer including a hole transport compound, the hole transport compound being doped with an electron accepting compound that has a lowest unoccupied molecular orbital (LUMO) level of about −9.0 eV to about −4.0 eV;
- and
- a second layer between the first layer and the emission layer, the second layer being closer to the emission layer than the first layer and including a compound represented by the following Formula 1:
- wherein, in Formula 1,
- Ar5 to Ar8 are each independently a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms or a substituted or unsubstituted heteroaryl group having 5 to 50 ring carbon atoms,
- each m is independently an integer of 0 to 4, and
- L2 and L3 are each independently a single bond, a substituted or unsubstituted arylene group having 6 to 18 ring carbon atoms, or a substituted or unsubstituted heteroarylene group having 5 to 15 ring carbon atoms.
An organic electroluminescent (EL) device, comprising:
- an anode;
- an emission layer for obtaining luminescence via a singlet excited state;
- and
- a laminated structure between the anode and the emission layer, the laminated structure including at least three layers having different components,
- wherein the laminated structure includes:
- a first layer including an electron accepting compound having a lowest unoccupied molecular orbital (LUMO) level of about −9.0 eV to about −4.0 eV as a main component;
- and
- a second layer between the first layer and the emission layer, the second layer being adjacent to the emission layer and including a compound represented by the following Formula 1:
- wherein, in Formula 1,
- Ar5 to Ar8 are each independently a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms or a substituted or unsubstituted heteroaryl group having 5 to 50 ring carbon atoms,
- each m is independently an integer of 0 to 4, and
- L2 and L3 are each independently a single bond, a substituted or unsubstituted arylene group having 6 to 18 ring carbon atoms, or a substituted or unsubstituted heteroarylene group having 5 to 15 ring carbon atoms.
Dependencies are inferred from the claim text.