Light emitting device
First Claim
1. A light emitting device comprising a plurality of light emitting elements over a substrate having an insulating surface, wherein each of the light emitting elements comprises:
- a first electrode;
a first layer comprising an organic compound provided over the first electrode;
a first carbon-based thin film formed over the first layer;
a second layer comprising an organic compound formed over the first carbon-based thin film;
a second carbon-based thin film over the second layer;
a third layer comprising an organic compound formed over the second carbon-based thin film;
a third carbon-based thin film over the third layer;
a fourth layer comprising an organic compound formed over the third carbon-based thin layer;
a fifth organic layer comprising an organic compound formed over the fourth layer; and
a second electrode provided over the fifth layer comprising an organic layer.
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Accused Products
Abstract
When a light emitting element is actuated to allow the light emission, the generation of Joule heat occurs, leading to the decomposition or crystallization of an organic compound to cause the degradation of the light emitting device. Therefore, a light emitting element of the present invention is provided for effecting removing or decreasing the generation of heat. In the present invention, between two electrodes, layers having organic compounds and carbon-based thin films are alternatively laminated one after another for stepping down the driving voltage in the light emitting element using the tunnel effect. In addition, a carbon-based thin film is placed on a film containing an organic compound, so that it prevents the electric filed from being locally concentrated and also prevents the generation of short-circuit between the anode and the cathode.
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Citations
34 Claims
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1. A light emitting device comprising a plurality of light emitting elements over a substrate having an insulating surface, wherein each of the light emitting elements comprises:
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a first electrode;
a first layer comprising an organic compound provided over the first electrode;
a first carbon-based thin film formed over the first layer;
a second layer comprising an organic compound formed over the first carbon-based thin film;
a second carbon-based thin film over the second layer;
a third layer comprising an organic compound formed over the second carbon-based thin film;
a third carbon-based thin film over the third layer;
a fourth layer comprising an organic compound formed over the third carbon-based thin layer;
a fifth organic layer comprising an organic compound formed over the fourth layer; and
a second electrode provided over the fifth layer comprising an organic layer. - View Dependent Claims (5, 11, 15, 20, 25, 30)
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2. A light emitting device comprising a plurality of light emitting elements over a substrate having an insulating layer, wherein each of the light emitting elements comprises:
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a first electrode;
a first layer comprising an organic compound provided over the first electrode;
a second layer comprising an organic compound formed over the first layer;
a first carbon-based thin film formed over the second layer;
a third layer comprising an organic compound formed over the first carbon-based thin film;
a second carbon-based thin film formed over the third layer;
a fourth layer comprising an organic compound formed over the second carbon-based thin film;
a third carbon-based thin film formed over the fourth layer;
a fifth layer comprising the organic compound formed over the third carbon-based thin film; and
a second electrode provided over the fifth layer. - View Dependent Claims (6, 12, 16, 19, 21, 24, 26, 29, 31, 34)
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3. A light emitting device comprising a plurality of light emitting elements over a substrate having an insulating layer, wherein each of the light emitting elements comprises:
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a first electrode;
a first layer comprising an organic compound provided over the first electrode;
a first carbon-based thin film formed over the first layer;
a second layer comprising an organic compound formed over the first carbon-based thin film;
a second carbon-based thin film formed over the second layer;
a third layer comprising an organic compound formed over the second carbon-based thin film;
a third carbon-based thin film formed over the third layer;
a fourth layer comprising an organic compound formed over the third carbon-based thin film;
a fourth carbon-based thin film formed over the fourth layer;
a fifth layer comprising an organic compound formed over the fourth carbon-based thin film; and
a second electrode provided over the fifth layer. - View Dependent Claims (7, 13, 17, 22, 27, 32)
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4. A light emitting device comprising a plurality of light emitting elements over a substrate having an insulating layer, wherein each of the light emitting elements comprises:
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a first electrode;
a first layer comprising an organic compound provided over the first electrode;
a second layer comprising an organic compound formed over the first layer;
a first carbon-based thin film formed over the second layer;
a third layer comprising an organic compound formed over the first carbon-based thin film;
a second carbon-based thin film formed over the third layer;
a fourth layer comprising an organic compound formed over the second carbon-based thin layer;
a fifth layer comprising an organic compound formed over the fourth layer; and
a second electrode provided over the fifth layer. - View Dependent Claims (8, 14, 18, 23, 28, 33)
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9. A light emitting device comprising a plurality of light emitting elements over a substrate having an insulating layer, wherein each of the light emitting elements comprises:
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a first electrode;
a first layer comprising an organic compound provided over the first electrode;
a first conductive thin film comprising an organic material over the first layer;
a second layer comprising an organic compound over the first conductive thin film;
a second conductive thin film comprising an organic material over the second layer;
a third layer comprising an organic compound over the second conductive thin film;
a third conductive thin film comprising an organic material over the third layer;
a fourth layer comprising an organic compound over the third conductive thin film;
a fifth layer comprising an organic compound over the fourth layer; and
a second electrode provided over the fifth layer. - View Dependent Claims (10)
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Specification