摘要:
The light-emitting element of the present invention includes a light-emitting layer and a layer for controlling movement of carriers between a pair of electrodes. The layer for controlling movement of carriers includes a first organic compound having a carrier transporting property and a second organic compound for reducing the carrier transporting property of the first organic compound, and the second organic compound is dispersed in the first organic compound. The layer for controlling movement of carriers is provided in such a manner, whereby change in carrier balance with time can be suppressed. Therefore, a light-emitting element having a long lifetime can be obtained.
摘要:
The light-emitting element includes: a light-emitting layer and a layer for controlling the movement of carriers between a first electrode and a second electrode. The layer for controlling the movement of carriers contains a first organic compound and a second organic compound, and is provided between the light-emitting layer and the second electrode. The first organic compound has an electron transporting property, and the second organic compound has an electron trapping property. The weight percent of the first organic compound is higher than that of the second organic compound. The light-emitting layer emits light when a voltage is applied such that the potential of the first electrode is higher than that of the second electrode. The first organic compound having the electron transporting property may be replaced with an organic compound having a hole transporting property, and the second organic compound having the electron trapping property may be replaced with an organic compound having a hole trapping property.
摘要:
It is an object to provide a novel bipolar organic compound. In particular, it is an object to provide a bipolar organic compound excellent in thermal stability. Further, it is another object to provide a bipolar organic compound which is electrochemically stable. A quinoxaline derivative represented by a general formula (1) is provided. Further, since the quinoxaline derivative represented by the general formula (1) is bipolar, the use of the quinoxaline derivative of the present invention allows fabrication of a light-emitting element and a light-emitting device with a low driving voltage and low power consumption. Furthermore, a light-emitting element with high luminous efficiency can be obtained.
摘要:
A light-emitting compound that can be easily applied to vacuum vapor deposition and exhibit long wavelength light is disclosed. Further, a light-emitting element without inferior luminescence properties due to the carbonization of a light-emitting compound during vapor deposition; and a light-emitting device that is composed of the light-emitting elements are also disclosed. A pyran derivative is represented by the following general formula 1: wherein R1 is a hydrogen element or an alkoxy group.
摘要:
An electroluminescent element which is superior in luminescence properties and lifetime can be provided by forming a thin film with high controllability according to the invention. An electroluminescent layer is formed over a first electrode by applying a current density of from 0.4 to 1.5 mA/cm2 for from 0.8 to 3.0 seconds to a first electrode of the electroluminescent element in accordance with the fact that an electrolytic polymerization film can be formed over the surface of the electrode uniformly by keeping a current density and time for applying the current to the electrode within a predetermined range during electrolytic polymerization especially when the electrolytic polymerization film is required to be a thin film.
摘要翻译:可以通过根据本发明形成具有高可控性的薄膜来提供发光性能和寿命优异的电致发光元件。 通过向电致发光元件的第一电极施加0.4至1.5mA / cm 2的电流密度0.8至3.0秒,在第一电极上形成电致发光层,根据以下事实: 通过在电解聚合期间保持电流密度和在电极中施加电流到预定范围内的时间,特别是当电解聚合膜需要为薄膜时,可以在电极的表面上均匀地形成电解聚合膜。
摘要:
The present invention provides a novel substance having an excellent color purity of blue, a light-emitting element and a light-emitting device using the novel substance. A stilbene derivative has a structure shown by the general formula (1). In the general formula (1), R1 is hydrogen, an alkyl group having 1 to 4 carbon atoms, or an aryl group having 6 to 25 carbon atoms. R2 is an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 25 carbon atoms. Each of R3 to R5 is hydrogen or an alkyl group having 1 to 4 carbon atoms. Ar1 is an aryl group having 6 to 25 carbon atoms.
摘要翻译:本发明提供了具有优异的蓝色纯度的新物质,发光元件和使用该新物质的发光装置。 二苯乙烯衍生物具有通式(1)所示的结构。 在通式(1)中,R 1是氢,具有1至4个碳原子的烷基或具有6至25个碳原子的芳基。 R 2是具有1至4个碳原子的烷基或具有6至25个碳原子的芳基。 R 3至R 5中的每一个为氢或具有1至4个碳原子的烷基。 Ar 1是具有6至25个碳原子的芳基。
摘要:
The present invention provides a method for manufacturing a light-emitting element that can be driven with low voltage or utilizes current more efficiently without damaging an organic compound, and a light-emitting element formed by the method. According to the present invention, a rubbing treatment is performed on a surface of an electrode on which an organic layer is formed so as to control a molecular arrangement of an organic compound included in the organic layer. A second electrode is formed over the organic compound.
摘要:
The present invention provides an evaluation method for evaluating whether a light-emitting element material to be evaluated is suitable for a host material or a guest material. By carrying out a first step of measuring absorption intensity of a light-emitting element material and a second step of irradiating the light-emitting element material with light for a predetermined period of time, repeatedly; thereby a change in absorption intensity with time is evaluated so that whether the light-emitting material is suitable for a host material or a guest material can be distinguished. The light emitted to the light-emitting element material preferably has a wavelength component which is absorbed by a skeleton which contributes to excitation of the light-emitting element material.
摘要:
It is an object of the present invention to provide a light emitting element with reduced inconvenience due to dust or the like and a manufacturing method thereof. One feature of the invention is a light emitting element having a first layer provided so as to be in contact with a first electrode, and a second layer provided so as to be in contact with the first layer, between the first electrode and a second electrode. A light emitting layer exists between the second layer and the second electrode. The first electrode, the second electrode, the first layer, the second layer, and the light emitting layer are stacked so that the first layer is formed in advance compared with the second layer. Here, the first layer is a layer containing an organic compound. Especially, an organic compound having conductivity is preferable among organic compounds. Alternatively, the second layer is a layer containing an inorganic compound. In particular, an inorganic compound having hole transport property is preferable among inorganic compounds.
摘要:
It is an object of the present invention to provide a luminescent material that has resistance to repeated oxidation reactions. Further, it is an object of the present invention to provide a light-emitting element that is high in luminous efficiency. Further, it is an object of the present invention to provide a light-emitting element that has a long life. An aspect of the present invention is an anthracene derivative represented by a general formula (1). In the general formula (1), R2 to R4 and R7 to R9 are individually any one of hydrogen, an alkyl group having 1 to 4 carbon atoms, and a group represented by the following structure formula (2), and R1, R5, R6, and R10 are individually any one of hydrogen and an alkyl group having 1 to 4 carbon atoms.