Organic electroluminescent display device and method of preparing the same
First Claim
1. An organic electroluminescent display device, comprising:
- a first electrode provided on a substrate;
a second electrode formed so as to be insulated from the first electrode;
one or more organic layers interposed between the first electrode and the second electrode and including at least an emission layer; and
one layer or a plurality of layers formed on the second electrode and composed of a material or materials having a refractive index higher than a refractive index of a material used to form the second electrode.
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Abstract
The present invention provides an organic electroluminescent display device and a method of preparing the same. The organic electroluminescent display device may include a first electrode formed on a substrate. A second electrode may be formed so as to be insulated from the first electrode. One or more organic layers may be interposed between the first electrode and the second electrode and include at least an emission layer. One layer or a plurality of layers may be formed on the second electrode and comprise a material or materials having a refractive index higher than a refractive index used to form a material that comprise the second electrode. An organic electroluminescent display device fabricated in this matter has improved efficiency of light extraction. Such a device also resists infiltration of moisture and oxygen to a luminous part of the device that includes the first electrode, the second electrode, and the organic layer.
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Citations
19 Claims
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1. An organic electroluminescent display device, comprising:
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a first electrode provided on a substrate;
a second electrode formed so as to be insulated from the first electrode;
one or more organic layers interposed between the first electrode and the second electrode and including at least an emission layer; and
one layer or a plurality of layers formed on the second electrode and composed of a material or materials having a refractive index higher than a refractive index of a material used to form the second electrode. - View Dependent Claims (2, 3)
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4. An organic electroluminescent display device, comprising:
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a first electrode provided on a substrate;
a second electrode formed so as to be insulated from the first electrode;
one or more organic layers interposed between the first electrode and the second electrode and including at least an emission layer; and
a protective layer formed on the second electrode, wherein a buffering layer is interposed between the second electrode and the protective layer. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of preparing an organic electroluminescent display device, the method comprising:
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forming a first electrode on a substrate part;
forming one or more organic layers including at least an emission layer on the first electrode;
forming a second electrode on the organic layer; and
forming one layer or a plurality of layers comprising a material or materials having a refractive index higher than a refractive index of a material used to form the second electrode on the second electrode. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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Specification