Light-emitting element and light emitting device using the same
First Claim
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1. A method for manufacturing a light-emitting device comprising:
- forming a first layer by co-evaporating molybdenum oxide and a first compound over a substrate;
forming a second layer by evaporating the first compound over the first layer;
forming a third layer by co-evaporating a second compound and a third compound over the second layer;
forming a fourth layer by evaporating the second compound over the third layer; and
forming a fifth layer by co-evaporating lithium and the second compound over the fourth layer.
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Abstract
The present invention provides a light-emitting element having less increase in driving voltage with the accumulation of light-emission time, and provides a light-emitting element having less increase in resistance value with the increase in film thickness. A light-emitting element includes a first layer, a second layer and a third layer between a first electrode and a second electrode. The first layer is provided to be closer to the first electrode than the second layer, and the third layer is provided to be closer to the second electrode than the second layer. The first layer is a layer including an aromatic amine compound and a substance showing an electron accepting property to the aromatic amine compound. The second layer includes a substance of which an electron transporting property is stronger than a hole transporting property, and a substance showing an electron donating property to the aforementioned substance.
51 Citations
20 Claims
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1. A method for manufacturing a light-emitting device comprising:
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forming a first layer by co-evaporating molybdenum oxide and a first compound over a substrate; forming a second layer by evaporating the first compound over the first layer; forming a third layer by co-evaporating a second compound and a third compound over the second layer; forming a fourth layer by evaporating the second compound over the third layer; and forming a fifth layer by co-evaporating lithium and the second compound over the fourth layer. - View Dependent Claims (2, 3, 4, 5)
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6. A method for manufacturing a light-emitting device comprising:
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forming a first layer by co-evaporating molybdenum oxide and a first compound over a substrate; forming a second layer by evaporating the first compound over the first layer; forming a third layer by co-evaporating a second compound and a third compound over the second layer; forming a fourth layer by evaporating the second compound over the third layer; forming a fifth layer by co-evaporating lithium and the second compound over the fourth layer; and forming a sixth layer by co-evaporating the molybdenum oxide and the first compound over the fifth layer. - View Dependent Claims (7, 8, 9, 10)
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11. A method for manufacturing a light-emitting device comprising:
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forming a first layer by co-evaporating molybdenum oxide and a first compound over a substrate; forming a second layer by evaporating the first compound over the first layer; forming a third layer by co-evaporating a second compound and a third compound over the second layer; forming a fourth layer by evaporating the second compound over the third layer; and forming a fifth layer by co-evaporating lithium oxide and the second compound over the fourth layer. - View Dependent Claims (12, 13, 14, 15)
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16. A method for manufacturing a light-emitting device comprising:
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forming a first layer by co-evaporating molybdenum oxide and a first compound over a substrate; forming a second layer by evaporating the first compound over the first layer; forming a third layer by co-evaporating a second compound and a third compound over the second layer; forming a fourth layer by evaporating the second compound over the third layer; forming a fifth layer by co-evaporating lithium oxide and the second compound over the fourth layer; and forming a sixth layer by co-evaporating the molybdenum oxide and the first compound over the fifth layer. - View Dependent Claims (17, 18, 19, 20)
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Specification
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Current AssigneeSemiconductor Energy Laboratory Co., Ltd.
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Original AssigneeSemiconductor Energy Laboratory Co., Ltd.
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InventorsKumaki, Daisuke, Seo, Satoshi
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Primary Examiner(s)Pert, Evan
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Assistant Examiner(s)WILSON, SCOTT R
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Application NumberUS12/503,115Publication NumberTime in Patent Office1,077 DaysField of SearchNoneUS Class Current257/103CPC Class CodesH10K 2102/351 ThicknessH10K 50/00 Organic light-emitting devi...H10K 50/17 Carrier injection layersH10K 50/171 Electron injection layersH10K 50/85 Arrangements for extracting...H10K 59/12 Active-matrix OLED [AMOLED]...H10K 59/131 Interconnections, e.g. wiri...H10K 59/17 Passive-matrix OLED displaysH10K 59/875 Arrangements for extracting...H10K 85/30 Coordination compoundsH10K 85/611 Charge transfer complexesH10K 85/636 comprising heteroaromatic h...H10K 85/657 Polycyclic condensed hetero...Y10S 257/918 Light emitting regenerative...
