Light-emitting device
First Claim
1. A light-emitting device comprising:
- a light-emitting element comprising a plurality of light-emitting units and an intermediate conductive layer between a pair of electrodes, wherein each of the plurality of light-emitting units comprises a light-emitting layer including a base material which is an impurity element and a compound containing an element belonging to group 2 and an element belonging to group 16, and wherein the plurality of light-emitting units are connected in series with the intermediate conductive layer interposed therebetween.
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Accused Products
Abstract
It is an object of the present invention to provide a light-emitting device with high current efficiency and high display quality, in which a change in luminance with time is suppressed. The light-emitting device is provided with a plurality of light-emitting elements in each of which a plurality of light-emitting units each including at least one light-emitting layer are connected in series between a pair of electrodes. Between one of light-emitting units and the other light-emitting unit, an intermediate conductive layer is provided in the light-emitting unit. The light-emitting layer includes base material which is a compound containing an element belonging to group 2 and an element belonging to group 16 or a compound containing an element belonging to group 12 and an element belonging to group 16, and an impurity element which is an emission center. This structure makes it possible to increase light emission luminance without increasing current density.
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Citations
49 Claims
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1. A light-emitting device comprising:
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a light-emitting element comprising a plurality of light-emitting units and an intermediate conductive layer between a pair of electrodes, wherein each of the plurality of light-emitting units comprises a light-emitting layer including a base material which is an impurity element and a compound containing an element belonging to group 2 and an element belonging to group 16, and wherein the plurality of light-emitting units are connected in series with the intermediate conductive layer interposed therebetween. - View Dependent Claims (7, 13, 19, 25, 31, 37)
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2. A light-emitting device comprising:
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a light-emitting element comprising a plurality of light-emitting units and an intermediate conductive layer between a pair of electrodes, wherein each of the plurality of light-emitting units comprises a light-emitting layer including a base material which is an impurity element and a compound containing an element belonging to group 12 and an element belonging to group 16, and wherein the plurality of light-emitting units are connected in series with the intermediate conductive layer interposed therebetween. - View Dependent Claims (8, 14, 20, 26, 32, 38)
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3. A light-emitting device comprising:
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a pixel portion including a plurality of light-emitting elements, each of the plurality of light-emitting elements comprising;
a plurality of light-emitting units and an intermediate conductive layer between a pair of electrodes, wherein each of the plurality of light-emitting units comprises a light-emitting layer including a base material which is an impurity element and a compound containing an element belonging to group 2 and an element belonging to group 16, wherein the plurality of light-emitting units are connected in series with the intermediate conductive layer interposed therebetween, and wherein the intermediate conductive layer provided for each of the plurality of light-emitting elements is separate from each other. - View Dependent Claims (9, 15, 21, 27, 33, 39)
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4. A light-emitting device comprising:
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a pixel portion including a plurality of light-emitting elements, each of the plurality of light-emitting elements comprising;
a plurality of light-emitting units and an intermediate conductive layer between a pair of electrodes, wherein each of the plurality of light-emitting units comprises a light-emitting layer including a base material which is an impurity element and a compound containing an element belonging to group 12 and an element belonging to group 16, wherein the plurality of light-emitting units are connected in series with the intermediate conductive layer interposed therebetween, and wherein the intermediate conductive layer provided for each of the plurality of light-emitting elements is separate from each other. - View Dependent Claims (10, 16, 22, 28, 34, 40)
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5. A light-emitting device comprising:
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a pixel portion including a plurality of light-emitting elements and a plurality of partition layers, each of the plurality of light-emitting elements comprising;
a plurality of light-emitting units and an intermediate conductive layer between a pair of electrodes, wherein each of the plurality of light-emitting units comprises a light-emitting layer including a base material which is an impurity element and a compound containing an element belonging to group 2 and an element belonging to group 16, wherein the plurality of light-emitting units are connected in series with the intermediate conductive layer interposed therebetween, wherein the intermediate conductive layer provided for each of the plurality of light-emitting elements is separate from each other, and wherein edges of the intermediate conductive layer are positioned over the plurality of partition layers. - View Dependent Claims (11, 17, 23, 29, 35, 41)
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6. A light-emitting device comprising:
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a pixel portion including a plurality of light-emitting elements and a plurality of partition layers, each of the plurality of light-emitting elements comprising;
a plurality of light-emitting units and an intermediate conductive layer between a pair of electrodes, wherein each of the plurality of light-emitting units comprises a light-emitting layer including a base material which is an impurity element and a compound containing an element belonging to group 12 and an element belonging to group 16, wherein the plurality of light-emitting units are connected in series with the intermediate conductive layer interposed therebetween, wherein the intermediate conductive layer provided for each of the plurality of light-emitting elements is separate from each other, and wherein edges of the intermediate conductive layer are positioned over the plurality of partition layers. - View Dependent Claims (12, 18, 24, 30, 36, 42)
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43. A light-emitting device comprising:
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a first light-emitting unit comprising a first light-emitting layer formed over a first electrode;
an intermediate conductive layer formed over the first light-emitting unit;
a second light-emitting unit comprising a second light-emitting layer formed over the intermediate conductive layer; and
a second electrode formed over the second light-emitting unit, wherein each of the first light-emitting layer and the second light-emitting layer comprises a base material which is a compound containing an element belonging to group 2 and an element belonging to group 16 and an impurity element, and wherein the first light-emitting unit is in contact with the second light-emitting unit. - View Dependent Claims (44, 45, 46, 47, 48, 49)
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Specification