LIGHT EMITTING ELEMENT, METHOD FOR MANUFACTURING SAME, AND LIGHT EMITTING DEVICE
First Claim
1. A light-emitter, comprising:
- a first electrode;
a layered body disposed on the first electrode, the layered body including a charge injection layer, a charge transport layer, and a light-emitting layer;
a second electrode disposed on the layered body; and
a bank that defines a position of the light-emitting layer,wherein the charge injection layer is formed by oxidation of an upper portion of a metal,the first electrode includes a metal layer that is a lower portion of the metal,an inner portion of the charge injection layer is depressed to define a recess,an upper peripheral edge of the recess is covered with a part of the bank, anda lower surface of the charge transport layer faces a portion of the recess not covered with the part of the bank.
5 Assignments
0 Petitions
Accused Products
Abstract
Each of organic light-emitting elements 100a, 100b and 100c includes an anode, a functional layer including a hole-injection layer, a hole-transport layer and an organic light-emitting layer, and a cathode layered on a substrate in the stated order. Also, a bank defines a formation area of the organic light-emitting layer. Here, the hole-injection layer is a metal oxide layer formed by oxidizing an upper surface portion of the anode composed of the metal layer. Also, a portion of the hole-injection layer that is positioned under the area is depressed so as to form a recess, and upper peripheral edge of the recess is covered with a portion of the bank.
12 Citations
21 Claims
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1. A light-emitter, comprising:
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a first electrode; a layered body disposed on the first electrode, the layered body including a charge injection layer, a charge transport layer, and a light-emitting layer; a second electrode disposed on the layered body; and a bank that defines a position of the light-emitting layer, wherein the charge injection layer is formed by oxidation of an upper portion of a metal, the first electrode includes a metal layer that is a lower portion of the metal, an inner portion of the charge injection layer is depressed to define a recess, an upper peripheral edge of the recess is covered with a part of the bank, and a lower surface of the charge transport layer faces a portion of the recess not covered with the part of the bank. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for manufacturing a light-emitter including a first electrode;
- a layered body that is over the first electrode and includes a charge injection layer, a charge transport layer, and a light-emitting layer, a second electrode over the layered body; and
a bank that defines a position of the light-emitting layer, the method comprising;forming a metal layer; forming a first metal oxide layer by oxidizing an upper portion of the metal layer; forming a bank material layer on the first metal oxide layer; removing a portion of the bank material layer and a portion of the first metal oxide layer to expose an exposed surface of an unoxidized portion of the metal layer and to define an area from which the portion of the bank material layer and the portion of the first metal oxide layer have been removed; forming a second metal oxide layer by oxidizing an upper portion of the unoxidized portion of the metal layer around the exposed surface to form the charge injection layer, the charge injection layer including the second metal oxide layer and an unremoved portion of the first metal oxide layer, the first electrode including a portion of the metal layer that has not been oxidized; thermally treating an unremoved portion of the bank material layer, the unremoved portion of the bank material layer being on the unremoved portion of the metal oxide layer; forming the charge transport layer on the charge injection layer after thermally treating the unremoved portion of the bank material layer, and forming the light-emitting layer on the charge transport layer, wherein the charge injection layer comprises a material that is erosive by a solution used for removing the portion of the bank material layer, an inner portion of the charge injection layer is eroded by the solution to define a recess having a bottom surface corresponding to the exposed surface so that the exposed surface is lower than a bottom surface of a portion of the unremoved portion of the bank material layer, when thermally treating the unremoved portion of the bank material layer, the unremoved portion of the bank material layer is fluid so that the bank material layer extends to cover an upper peripheral edge of the recess, and the charge transport layer is formed on an exposed surface of the recess not covered with a part of the bank material layer. - View Dependent Claims (16, 17, 18, 19, 20, 21)
- a layered body that is over the first electrode and includes a charge injection layer, a charge transport layer, and a light-emitting layer, a second electrode over the layered body; and
Specification