LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, LIGHTING DEVICE, DISPLAY DEVICE, DISPLAY PANEL, AND ELECTRONIC APPLIANCE
First Claim
1. A light-emitting device comprising:
- a first light-emitting element comprising;
a first electrode;
an EL layer over the first electrode; and
a second electrode over the EL layer; and
a second light-emitting element comprising;
a third electrode;
the EL layer over the third electrode; and
the second electrode over the EL layer,wherein the EL layer comprises a first light-emitting layer, a first layer over and in contact with the first light-emitting layer, and a second light-emitting layer over and in contact with the first layer,wherein the first light-emitting layer has a different structure from the second light-emitting layer, andwherein the first light-emitting element and the second light-emitting element are different in a carrier-injection property.
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Accused Products
Abstract
A light-emitting device in which different electrodes in a work function are used in a first light-emitting element and a second light-emitting element are provided. A light-emitting device includes a first light-emitting element and a second light-emitting element. The first light-emitting element includes a first electrode, an EL layer, and a second electrode in this order. The second light-emitting element includes a third electrode, the EL layer, and the second electrode in this order. The EL layer includes a first light-emitting layer, a layer, and a second light-emitting layer in this order. The structure of the first light-emitting layer is different from the structure of the second light-emitting layer. The first light-emitting element and the second light-emitting element are different in a carrier-injection property.
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Citations
21 Claims
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1. A light-emitting device comprising:
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a first light-emitting element comprising; a first electrode; an EL layer over the first electrode; and a second electrode over the EL layer; and a second light-emitting element comprising; a third electrode; the EL layer over the third electrode; and the second electrode over the EL layer, wherein the EL layer comprises a first light-emitting layer, a first layer over and in contact with the first light-emitting layer, and a second light-emitting layer over and in contact with the first layer, wherein the first light-emitting layer has a different structure from the second light-emitting layer, and wherein the first light-emitting element and the second light-emitting element are different in a carrier-injection property. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A light-emitting device comprising:
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a first light-emitting element comprising; a first electrode; an EL layer over the first electrode; and a second electrode over the EL layer, the second electrode comprising a metal film; and a second light-emitting element comprising; a third electrode; a light-transmitting layer over the third electrode; the EL layer over the light-transmitting layer; and the second electrode over the EL layer, wherein the first electrode and the third electrode comprises the same material, wherein the EL layer comprises; a hole-injection layer in contact with the first electrode; a hole-transport layer in contact with the hole-injection layer; and a first light-emitting layer in contact with the hole-transport layer, wherein the hole-injection layer comprises an acceptor substance, wherein the first light-emitting layer comprises a second light-emitting layer and a third light-emitting layer, wherein the second light-emitting layer comprises a first light-emitting material, wherein the third light-emitting layer comprises a second light-emitting material, wherein an emission peak wavelength of the first light-emitting material is shorter than that of the second light-emitting material, wherein the first light-emitting material is different from the second light-emitting material, and wherein the first light-emitting element and the second light-emitting element are different in a carrier-injection property. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification