Luminous device and method for manufacturing same
A light-emitting device and manufacturing method technology, applied in the direction of lighting devices, electroluminescent light sources, semiconductor/solid-state device manufacturing, etc., capable of solving problems such as characteristic deterioration
Inactive Publication Date: 2006-11-01
SEMICON ENERGY LAB CO LTD
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Problems solved by technology
[0007] In the light-emitting device disclosed in Patent Document 1, organic light-emitting layers and inorganic compound layers are alternately stacked, so there is a possibility that characteristics may deteriorate due to stress
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[0091] [Embodiment Mode 1]
[0092] will refer to Figures 1 to 4 Examples of the present invention are described. Here, the case where the carrier transport layer is a hole transport layer will be described.
[0093] exist figure 1 In the light emitting device shown, an anode 2 , a first hole transport layer 3 , a light emitting layer 4 and a second hole transport layer 5 stacked repeatedly, an electron transport layer 6 , and a cathode 7 are formed on a substrate 1 . A hole injection layer is provided between the anode 2 and the first hole transport layer 3 . In addition, an electron injection layer may be provided between the cathode 7 and the electron transport layer 6 . The first and second hole transport layers may be formed using the same material or different materials. A multilayer formed of the second hole transport layer 5 and the light emitting layer 4 is stacked. The thickness of the second hole transport layer 5 is smaller than the thickness of each light e...
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An object of the present invention is to provide a light emitting device including an organic light emitting layer and an organic compound and having high light emitting efficient along with less deterioration in characteristics. In the light emitting device, an anode, a cathode facing the anode, light emitting layers each comprising an organic compound and being provided between the anode and the cathode, and carrier transporting layers each comprising an organic compound, are provided over a substrate. Each of the light emitting layers and each of the carrier transporting layers are alternately stacked. A thickness of each of the carrier transporting layers is thinner than that of each of the light emitting layers. When each of the carrier transporting layers is a hole transporting layer, each of the light emitting layers has an electron transporting property. When each of the carrier transporting layers is an electron transporting layer, each of the light emitting layers has a hole transporting property.
Description
technical field [0001] The present invention relates to a light emitting device used for displays and the like and a method of manufacturing the same. Background technique [0002] In recent years, with the advancement of the information society, there has been an increasing demand for display devices that consume less power and are thinner than conventional CRT displays. As such a display, a liquid crystal display and a plasma display can be used, and these displays have been put into practical use. [0003] Currently, light emitting devices using organic compounds have been developed so that more power consumption reduction and more vivid full colors can be achieved compared to liquid crystal displays and plasma displays. In this light-emitting device, electrodes (anode and cathode) are attached to both surfaces of a solid thin film made of an organic compound that emits strong fluorescence or phosphorescence in the solid state. By injecting holes from the anode and inje...
Claims
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IPC IPC(8): H01L51/50H01L51/56H05B33/10H05B33/12
CPCY10T428/24942Y10T428/2495Y10T428/24967H10K50/11H10K2102/351
Inventor 野村亮二加藤薰吉本智史山崎舜平
Owner SEMICON ENERGY LAB CO LTD