ORGANIC EL DEVICE AND AN ORGANIC EL DEVICE PRODUCING METHOD
First Claim
1. An organic EL device in which charges are injected into a luminescent layer of an organic thin film formed between a first electrode layer and a second electrode layer, thereby emitting a light,the organic EL device comprising:
- a charge injection layer formed between the luminescent layer and the second electrode layer; and
a charge transporting layer formed between the luminescent layer and the charge injection layer,wherein the charge transporting layer is constituted by a matrix organic material, the charge injection layer consisting of a thin film in which a charge injectable metallic material and the same matrix organic material as the charge transporting layer are mixed, and wherein a metallic film formed by a sputtering method is disposed on a surface of the charge injection layer.
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Abstract
A technology is provided, which obtains an organic EL device free from any reduction in the luminescent efficiency, even if an electrode layer is formed on a surface of a charge injection layer by a sputtering method. An organic EL device of the present invention includes a first charge injection layer, a first organic layer, and a second charge injection layer. The second charge injection layer is formed as a mixed layer in which a matrix organic material and a charge injectable metallic material are mixed. Even when the electrode layer is formed on a surface of this second charge injection layer by the sputtering method, the luminescent efficiency does not decrease.
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Citations
10 Claims
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1. An organic EL device in which charges are injected into a luminescent layer of an organic thin film formed between a first electrode layer and a second electrode layer, thereby emitting a light,
the organic EL device comprising: -
a charge injection layer formed between the luminescent layer and the second electrode layer; and a charge transporting layer formed between the luminescent layer and the charge injection layer, wherein the charge transporting layer is constituted by a matrix organic material, the charge injection layer consisting of a thin film in which a charge injectable metallic material and the same matrix organic material as the charge transporting layer are mixed, and wherein a metallic film formed by a sputtering method is disposed on a surface of the charge injection layer. - View Dependent Claims (2, 3, 4, 5)
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6. An organic EL device producing method for producing an organic EL device having a luminescent layer of an organic thin film formed between a first electrode layer and a second electrode layer, a charge injection layer formed between the luminescent layer and the second electrode layer, and a charge transporting layer formed between the luminescent layer and the charge injection layer;
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the organic EL device producing method comprising the steps of; a charge transporting layer forming step in which the charge transporting layer is formed by depositing a vapor of a matrix organic material alone; a charge injection layer forming step in which the charge injection layer is formed by depositing both the vapor of the matrix organic material and a vapor of the charge injectable metallic material; and a second electrode layer forming step in which the second electrode layer on a surface of the charge injection layer is formed by a sputtering method. - View Dependent Claims (7, 8, 9, 10)
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Specification