Light-emitting device and method of manufacturing the same
First Claim
1. A light emitting device comprising:
- a first electrode over a substrate;
a first emission layer over the first electrode;
a first cluster of organic substances in contact with the first emission layer;
a second emission layer in contact with the first cluster of organic substances;
a second cluster of organic substances in contact with the second emission layer;
a third emission layer in contact with the second cluster of organic substances; and
a second electrode over the third emission layer.
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Abstract
The present invention has an object to provide a method of raising a re-coupling efficiency of carriers in an EL element to thereby provide a light-emitting device having high emission efficiency. The method is that the electron trap region 106 and the hole trap region 107 are formed in the interior of the emission layer 103. The electron trap region 106 here is a region that has the action of enclosing within the emission layer an electrons that is transferred at the lowest unoccupied molecular orbit (LUMO) level of the emission layer 103. In addition, the hole trap region 107 is a region that has the action of enclosing within the emission layer a hole that is transferred at the highest occupied molecular orbit (HOMO) level of the emission layer 103.
21 Citations
28 Claims
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1. A light emitting device comprising:
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a first electrode over a substrate; a first emission layer over the first electrode; a first cluster of organic substances in contact with the first emission layer; a second emission layer in contact with the first cluster of organic substances; a second cluster of organic substances in contact with the second emission layer; a third emission layer in contact with the second cluster of organic substances; and a second electrode over the third emission layer. - View Dependent Claims (2, 3, 4, 5)
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6. A light emitting device comprising:
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a thin film transistor over a substrate; a first electrode over the thin film transistor; a first emission layer over the first electrode; a first cluster of organic substances in contact with the first emission layer; a second emission layer in contact with the first cluster of organic substances; a second cluster of organic substances in contact with the second emission layer; a third emission layer in contact with the second cluster of organic substances; and a second electrode over the third emission layer. - View Dependent Claims (7, 8, 9, 10)
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11. A light emitting device comprising:
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a thin film transistor over a substrate; a passivation film over the thin film transistor; a first electrode over the passivation film; a first emission layer over the first electrode; a first cluster of organic substances in contact with the first emission layer; a second emission layer in contact with the first cluster of organic substances; a second cluster of organic substances in contact with the second emission layer; a third emission layer in contact with the second cluster of organic substances; and a second electrode over the third emission layer. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A light emitting device comprising:
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a first electrode over a substrate; a first emission layer over the first electrode; a cluster of organic substances in contact with the first emission layer; a second emission layer in contact with the first cluster of organic substances; and a second electrode over the second emission layer. - View Dependent Claims (18, 19, 20)
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21. A light emitting device comprising:
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a thin film transistor over a substrate; a first electrode over the thin film transistor; a first emission layer over the first electrode; a cluster of organic substances in contact with the first emission layer; a second emission layer in contact with the first cluster of organic substances; and a second electrode over the second emission layer. - View Dependent Claims (22, 23, 24)
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25. A light emitting device comprising:
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a thin film transistor over a substrate; a passivation film over the thin film transistor; a first electrode over the passivation film; a first emission layer over the first electrode; a cluster of organic substances in contact with the first emission layer; a second emission layer in contact with the first cluster of organic substances; and a second electrode over the second emission layer. - View Dependent Claims (26, 27, 28)
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Specification