LIGHT EMITTING ELEMENT, LIGHT EMITTING DEVICE, AND ELECTRONIC DEVICE
First Claim
1. A light emitting device comprising:
- a light emitting element comprising a light emitting layer and a barrier layer interposed between a first electrode and a second electrode, wherein the light emitting layer contains a base material and an impurity element which forms a luminescent center, wherein the barrier layer is provided in contact with the first electrode, and wherein light emission is obtained when a voltage is applied to the first electrode and the second electrode such that a potential of the second electrode is higher than a potential of the first electrode.
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Abstract
It is an object of the present invention to provide a light emitting element which can be driven at a low voltage. Other objects of the present invention are to provide a light emitting element with a high luminescent efficiency; a light emitting element with a high luminance; a light emitting element having long-life luminescence; a light emitting element and an electronic device having reduced power consumption; and a light emitting element and an electronic device which can be manufactured at low cost. The light emitting element has a light emitting layer and a barrier layer between a first electrode and a second electrode, the light emitting layer contains a base material and an impurity element, and the barrier layer is provided so as to be in contact with the first electrode. Light emission is obtained when a voltage is applied such that a potential of the second electrode becomes higher than a potential of the first electrode.
61 Citations
14 Claims
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1. A light emitting device comprising:
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a light emitting element comprising a light emitting layer and a barrier layer interposed between a first electrode and a second electrode, wherein the light emitting layer contains a base material and an impurity element which forms a luminescent center, wherein the barrier layer is provided in contact with the first electrode, and wherein light emission is obtained when a voltage is applied to the first electrode and the second electrode such that a potential of the second electrode is higher than a potential of the first electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification