Light-emitting element having metal oxide and light-emitting device using the same
First Claim
1. A light-emitting element comprising:
- a cathode and an anode; and
a plurality of layers sandwiched between the cathode and anode,wherein the plurality of layers include;
a first layer comprising a composite material of an organic compound and a conductive inorganic compound;
a second layer having an organic compound; and
a layer consisting of a substance selected from bismuth oxide, cobalt oxide, chromium oxide, copper oxide, and nickel oxide,wherein the layer is in contact with the cathode.
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Abstract
It is an object of the invention is to provide a light-emitting element in which failure of the light-emitting element due to separation can be controlled and stable luminescence can be obtained with high-efficiency and for a long stretch of time by controlling separation of layers constituting the light-emitting element. According to one aspect of a light-emitting element of the invention, the light-emitting element sandwiches a plurality of layers between a pair of electrodes, wherein at least one layer of the plurality of layers is a layer containing a substance selected from bismuth oxide, cobalt oxide, chromium oxide, copper oxide, nickel oxide, and titanium oxide, or at least one layer of layers different from a light-emitting layer among the plurality of layers is a mixed region of one substance selected from bismuth oxide, cobalt oxide, copper oxide, magnesium oxide, nickel oxide, zinc oxide, and titanium oxide and an organic compound.
41 Citations
11 Claims
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1. A light-emitting element comprising:
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a cathode and an anode; and a plurality of layers sandwiched between the cathode and anode, wherein the plurality of layers include; a first layer comprising a composite material of an organic compound and a conductive inorganic compound; a second layer having an organic compound; and a layer consisting of a substance selected from bismuth oxide, cobalt oxide, chromium oxide, copper oxide, and nickel oxide, wherein the layer is in contact with the cathode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A light-emitting element comprising:
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a pair of electrodes; and a plurality of layers sandwiched between the pair of electrodes, wherein the plurality of layers include; a first layer having an organic compound; a second layer having an organic compound; and a layer consisting of a substance selected from bismuth oxide, cobalt oxide, chromium oxide, copper oxide, and nickel oxide, wherein the layer is in contact with one of the pair of electrodes which functions as a cathode. - View Dependent Claims (10, 11)
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Specification
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- Resources
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Current AssigneeSemiconductor Energy Laboratory Co., Ltd.
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Original AssigneeSemiconductor Energy Laboratory Co., Ltd.
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InventorsNomura, Ryoji, Abe, Hiroko, Yamazaki, Shunpei
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Primary Examiner(s)Guharay; Karabi
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Application NumberUS10/994,371Publication NumberTime in Patent Office1,792 DaysField of Search313/506, 313/504, 428/690, 428/917US Class Current313/506CPC Class CodesH10K 50/14 Carrier transporting layersH10K 50/17 Carrier injection layersH10K 50/171 Electron injection layersH10K 50/18 Carrier blocking layersH10K 85/311 PhthalocyanineH10K 85/324 comprising aluminium, e.g. ...H10K 85/631 Amine compounds having at l...
