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US 7,507,485 B2Granted
Organic electroluminescent device
AssigneeLG Display Co., Ltd.
InventorsHyoung Yun Oh, Sung Koo Lee, Chun Gun Park, Jeong Dae Seo, Myung Seop Kim
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Abstract
Disclosed is an organic electroluminescent device including a first electrode, a second electrode, and a light-emitting layer having a guest material of a red luminescent material and at least two host materials so as to be formed between the first and second electrodes. One of the host materials is a composite including the following structural formula: Moreover, one of the host materials can be a substituted or non-substituted quinoline derivative.
Claims4
An organic electroluminescent device comprising:
- a first electrode;
- a second electrode;
- and
- a light-emitting layer having a guest material of a red luminescent material and first and second host materials formed between the first and second electrodes;
- wherein the first host material is an aromatic compound having one of the following structural formula;
- the second host material is a compound Alq3 which has the following structural formula;
- and the guest material is a DCM Derivative which has the following structural formula;
- wherein the light emitting layer with the guest material and the first and second host materials enhances red luminescence efficiency of the device and has similar CIE coordinates of a red color in comparison with a red light emitting layer comprising the second host material alone with the guest material, wherein the first host material alone has a first PL peak value at a first wavelength, the second host material alone has a second PL luminescent peak value at a second wavelength, and the first and second host materials together have a third PL peak value at a third wavelength band between the first and second wavelengths.
5 more elements
Dependencies are inferred from the claim text.