Organic electroluminescent device employing multi-layered anode
First Claim
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1. An organic electroluminescent (EL) device comprising:
- a substrate;
a first anode formed on the substrate, made of a reflective metal and having a reflectivity of 60% or higher;
a second anode formed directly on the first anode, and made of a conductive metal or an oxide thereof having a work function of 4.3 to 5.8 eV;
an organic layer formed on the second anode; and
a cathode formed on the organic layer,wherein the first anode comprises at least one material selected from the group of materials consisting of Al, Al alloy, Ag, Ag alloy and alloys of these materials.
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Abstract
An organic electroluminescent (EL) device includes a substrate, a first anode formed on the substrate with a reflectivity of 60% or higher, a second anode formed on the first anode, wherein the second anode includes a conductive metal or an oxide thereof having a work function of 4.3 to 5.8 eV, an organic layer formed on the second anode, and a cathode formed on the organic layer.
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Citations
19 Claims
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1. An organic electroluminescent (EL) device comprising:
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a substrate; a first anode formed on the substrate, made of a reflective metal and having a reflectivity of 60% or higher; a second anode formed directly on the first anode, and made of a conductive metal or an oxide thereof having a work function of 4.3 to 5.8 eV; an organic layer formed on the second anode; and a cathode formed on the organic layer, wherein the first anode comprises at least one material selected from the group of materials consisting of Al, Al alloy, Ag, Ag alloy and alloys of these materials. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An organic EL device of an active matrix drive type, comprising:
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a substrate; a thin film transistor formed on the substrate; an insulator layer formed on the thin film transistor; a first anode connected to source/drain electrodes of the thin film transistor through a via hole of the insulator layer, wherein the first anode is made of a reflective metal and has a reflectivity of 60% or higher; a second anode formed directly on the first anode, and made of a conductive metal or an oxide thereof having a work function of 4.3 to 5.8 eV; an organic layer formed on the second anode; and a cathode formed on the organic layer, wherein the first anode comprises at least one material selected from the group of materials consisting of Al, Al alloy, Ag, Ag alloy and alloys of these materials. - View Dependent Claims (10, 11, 12, 13)
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14. An organic EL device of an active matrix drive type, comprising:
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a substrate; a thin film transistor formed on the substrate; an insulator layer formed on the thin film transistor; a third anode connected to source/drain electrodes of the thin film transistor through a via hole of the insulator layer, and made of a conductive metal or an oxide thereof having a work function of 4.3 to 5.8 eV; a first anode formed directly on the third anode, made of a reflective metal and having a reflectivity of 60% or higher; a second anode formed directly on the first anode, and made of a conductive metal or an oxide thereof having a work function of 4.3 to 5.8 eV; an organic layer formed on the second anode; and a cathode formed on the organic layer, wherein the first anode comprises at least one material selected from the group of materials consisting of Al, Al alloy, Ag, Ag alloy and alloys of these materials. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification