Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device
First Claim
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1. A light-emitting element comprising:
- a pair of electrodes; and
a layer between the pair of electrodes,wherein the layer consists essentially of a first organic compound and a second organic compound,wherein the first organic compound has an electron-transport property, andwherein the second organic compound has a p-phenylenediamine skeleton.
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Abstract
The light-emitting element has a structure in which a first organic compound and a second organic compound form an exciplex (excited complex) in a light-emitting layer. The S1 level and the T1 level of the formed exciplex are positioned extremely close to each other compared to the S1 level and the T1 level of the respective substances (the first organic compound and the second organic compound) before the formation of the exciplex.
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Citations
14 Claims
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1. A light-emitting element comprising:
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a pair of electrodes; and a layer between the pair of electrodes, wherein the layer consists essentially of a first organic compound and a second organic compound, wherein the first organic compound has an electron-transport property, and wherein the second organic compound has a p-phenylenediamine skeleton. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A light-emitting element comprising:
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a pair of electrodes; and a layer between the pair of electrodes, wherein the layer comprises a first organic compound, a second organic compound, and a compound capable of converting triplet excited energy into light emission, wherein the first organic compound has an electron-transport property, and wherein the second organic compound is represented by the following formula; - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification