Organic light emitting element and manufacturing method of the same, organic display panel, and organic display device
View Patent ↗An organic light emitting element and method for manufacturing an organic light emitting element. A first electrode is formed from a metal alloy that includes a first metal material that exhibits a carrier-injection property upon oxidation, and a second metal material that is light-reflective and electrically conductive, a precipitate of the first metal material forming on at least part of a surface of the first electrode, and a metal oxide layer being formed in the precipitate. A functional layer contacts the surface of the first electrode and includes at least a light-emitting layer configured to accept a carrier injected by the first electrode. A second electrode is disposed opposite the first electrode with the functional layer therebetween and has a polarity different from a polarity of the first electrode.
1. An organic light emitting element, comprising:
a first electrode formed from a metal alloy, the metal alloy including a first metal material that exhibits a carrier-injection property upon oxidation and a second metal material that is light-reflective and electrically conductive, a precipitate of the first metal material being formed on at least a part of a surface of the first electrode, a metal oxide layer being formed on the precipitate;
a functional layer that contacts the surface of the first electrode and includes at least a light-emitting layer configured to accept a carrier injected by the first electrode; and
a second electrode disposed opposite the first electrode with the functional layer therebetween and having a polarity different from a polarity of the first electrode,
wherein the precipitate of the first metal material is discontinuously formed on the surface of the first electrode in a predetermined direction.
2. The organic light emitting element of claim 1 , wherein, on the surface of the first electrode, a second metal oxide layer is formed of the second metal material.
3. The organic light emitting element of claim 2 , wherein a discontinuous parts of the precipitate of the first metal material in the predetermined direction are each isolated within the second metal oxide layer formed of the second metal material.
4. The organic light emitting element of claim 3 , wherein the first metal material comprises one of any transition metal of Group 4 to Group 11 of the periodic table, and a typical metal of Group 12 of the periodic table.
5. The organic light emitting element of claim 3 , wherein the first electrode comprises an anode, the second electrode comprises a cathode, and the metal oxide layer formed on the precipitate of the first metal material has a hole-injection property whereby the metal oxide layer injects a hole as the carrier.
6. The organic light emitting element of claim 2 , wherein the first metal material comprises one of any transition metal of Group 4 to Group 11 of the periodic table, and a typical metal of Group 12 of the periodic table.
7. The organic light emitting element of claim 6 , wherein the functional layer includes a hole transporting layer configured to transport a hole to the light-emitting layer, the functional layer being in contact with the first electrode.
8. The organic light emitting element of claim 2 , wherein the first electrode comprises an anode, the second electrode comprises a cathode, and the metal oxide layer formed on the precipitate of the first metal material has a hole-injection property whereby the metal oxide layer injects a hole as the carrier.
9. The organic light emitting element of claim 1 , wherein the first metal material comprises one of any transition metal of Group 4 to Group 11 of the periodic table, and a typical metal of Group 12 of the periodic table.
10. The organic light emitting element of claim 9 , wherein the first electrode comprises an anode, the second electrode comprises a cathode, and the metal oxide layer formed on the precipitate of the first metal material has a hole-injection property whereby the metal oxide layer injects a hole as the carrier.
11. The organic light emitting element of claim 1 , wherein the first electrode comprises an anode, the second electrode comprises a cathode, and the metal oxide layer formed on the precipitate of the first metal material has a hole-injection property whereby the metal oxide layer injects a hole as the carrier.
12. The organic light emitting element of claim 1 , further comprising:
a light emitting cell; and
a non-light emitting portion, wherein
the light emitting cell includes the first electrode, the light-emitting layer, and the second electrode,
the non-light emitting portion includes an auxiliary electrode and the second electrode, without including the light-emitting layer,
the auxiliary electrode is formed from the metal alloy including the first metal material that exhibits the carrier-injection property upon oxidation and the second metal material that is light-reflective and electrically conductive, the precipitate of the first metal material is formed on at least part of a surface of the auxiliary electrode, and the metal oxide layer is formed on the precipitate, and
the second electrode is continuous across the light emitting cell and the non-light emitting portion.
13. The organic light emitting element of claim 1 , wherein the first metal material comprises nickel, and the second metal material comprises aluminum.
14. The organic light emitting element of claim 1 , wherein a content of the first metal material in the metal alloy is substantially in an atomic concentration range of 3.0-5.0 at. %, inclusive.
15. An organic display panel provided with the organic light emitting element according to claim 1 .
16. An organic display device provided with the organic display panel of claim 15 .