Light-emitting element and light-emitting device
First Claim
1. A light-emitting device comprising:
- an anode;
a first layer containing a light-emitting material over the anode;
a second layer containing an N-type semiconductor over the first layer;
a third layer including a transparent conductive film over the second layer;
a fourth layer containing a hole-transporting material over the third layer; and
a cathode over and in direct contact with the fourth layer.
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Accused Products
Abstract
It is an object of the present invention to provide a light-emitting element having, between a pair of electrodes, a layer containing a light-emitting material and a transparent conductive film, wherein the electric erosion of the transparent conductive film and reflective metal can be prevented and to provide a light-emitting device using the light-emitting element. According to the present invention, a first layer 102 containing a light-emitting material, a second layer 103 containing an N-type semiconductor, a third layer 104 including a transparent conductive film, and a fourth layer 105 containing a hole-transporting medium are provided between an anode 101 and a cathode 106, wherein the first layer 102, the second layer 103, the third layer 104, the fourth layer 105, and the cathode 106 are provided in order, and wherein the cathode has a layer containing reflective metal.
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Citations
37 Claims
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1. A light-emitting device comprising:
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an anode; a first layer containing a light-emitting material over the anode; a second layer containing an N-type semiconductor over the first layer; a third layer including a transparent conductive film over the second layer; a fourth layer containing a hole-transporting material over the third layer; and a cathode over and in direct contact with the fourth layer. - View Dependent Claims (2, 3, 4)
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5. A light-emitting device comprising:
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an anode; a first layer containing a light-emitting material over the anode; a second layer containing an N-type semiconductor over the first layer; a third layer including a transparent conductive film over the second layer; a fourth layer containing a hole-transporting material over the third layer; and a cathode containing a reflective metal over and in direct contact with the fourth layer. - View Dependent Claims (6, 7, 8, 9)
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10. A light-emitting device comprising:
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an anode; a cathode; a first layer containing a light-emitting material between the anode and the cathode; a second layer containing an N-type semiconductor between the first layer and the cathode; a third layer including a transparent conductive film between the second layer and the cathode; and a fourth layer containing a hole-transporting material between the third layer and the cathode, wherein the fourth layer is in direct contact with the cathode. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A light-emitting device comprising:
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an anode; a cathode; a first layer containing a light-emitting material between the anode and the cathode; a second layer containing an N-type semiconductor between the first layer and the cathode; a third layer including a transparent conductive film between the second layer and the cathode; and a fourth layer containing an P-type semiconductor between the third layer and the cathode, wherein the fourth layer is in direct contact with the cathode. - View Dependent Claims (17, 18, 19, 20, 21, 22, 37)
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23. A light-emitting device comprising:
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an anode; a cathode; a first layer containing a light-emitting material between the anode and the cathode; a second layer containing an N-type semiconductor between the first layer and the cathode; a third layer including a transparent conductive film between the second layer and the cathode; and a fourth layer containing an organic compound between the third layer and the cathode, wherein the fourth layer is in direct contact with the cathode. - View Dependent Claims (24, 25, 26, 27, 28, 29)
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30. A light-emitting device comprising:
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an anode; a cathode; a first layer containing a light-emitting material between the anode and the cathode; a second layer containing an N-type semiconductor between the first layer and the cathode; a third layer including a transparent conductive film between the second layer and the cathode; and a fourth layer containing a material having electron-receiving properties to an organic compound between the third layer and the cathode, wherein the fourth layer is in direct contact with the cathode. - View Dependent Claims (31, 32, 33, 34, 35, 36)
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Specification