Light-emitting element, light-emitting device, and electronic device
First Claim
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1. A light-emitting element comprising:
- a first electrode;
a second electrode;
a light-emitting layer interposed between the first electrode and the second electrode, wherein;
the light-emitting layer includes at least a first layer, a second layer and a third layer,the first layer includes a substance to be an emission center dispersed in a host material,the second layer includes the substance dispersed in the host material, andthe third layer is interposed between the first layer and the second layer; and
a fourth layer comprising an organic compound having hole transporting property and a metal compound the fourth layer between the light-emitting layer and one of the first electrode and the second electrode.
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Abstract
It is an object to provide a light-emitting element which can reduce power consumption. A light-emitting element is provided, which includes a pair of electrodes and a light-emitting layer interposed between the pair of electrodes. The light-emitting layer includes at least a first layer and a second layer, each of the first layer and the second layer includes an emission center and a host material, the emission center is dispersed in the host material, a thickness of each of the first layer and the second layer is 1 nm or more and 10 nm or less, and the first layer is not in contact with the second layer.
74 Citations
78 Claims
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1. A light-emitting element comprising:
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a first electrode; a second electrode; a light-emitting layer interposed between the first electrode and the second electrode, wherein; the light-emitting layer includes at least a first layer, a second layer and a third layer, the first layer includes a substance to be an emission center dispersed in a host material, the second layer includes the substance dispersed in the host material, and the third layer is interposed between the first layer and the second layer; and a fourth layer comprising an organic compound having hole transporting property and a metal compound the fourth layer between the light-emitting layer and one of the first electrode and the second electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A light-emitting element comprising:
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a first electrode; a second electrode; a light-emitting layer interposed between the first electrode and the second electrode, a first carrier transporting layer between the first electrode and the light-emitting layer; and a second carrier transporting layer between the first electrode and the light-emitting layer, wherein the light-emitting layer includes; a first layer including a first substance to be an emission center dispersed in a first host material; a second layer including a second substance dispersed in a second host material, and a third layer between the first layer and the second layer, the third layer containing a first material with a carrier transporting property; a fourth layer between the first carrier transporting layer and the first layer;
the fourth layer containing a second material with a carrier transporting property; anda fifth layer between the second carrier transporting layer and the second layer;
the fifth layer containing a third material with a carrier transporting property, andwherein the first material is the same as the first host material. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53)
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54. A light-emitting element comprising:
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a first electrode; a second electrode; and a light-emitting layer interposed between the first electrode and the second electrode, wherein the light-emitting layer includes; a first layer including a first substance to be an emission center dispersed in a first host material; a second layer including a second substance dispersed in a second host material, a third layer between the first layer and the second layer, the third layer containing a material with a carrier transporting property; a fourth layer between the first electrode and the first layer;
the fourth layer containing the material with the carrier transporting property; anda fifth layer between the second electrode and the second layer;
the fifth layer containing the material with the carrier transporting property, andwherein the material with the carrier transporting property is the same as the first host material. - View Dependent Claims (55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78)
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Specification