302results about How to "Good hole transport properties" patented technology

There are provided an organic having both excellent hole transporting property and satisfactory electron transporting and showing excellent durability against electric oxidation/reduction and a high triplet excitation level, and a charge transporting material and an organic electroluminescent device each using the organic compound. The organic compound is represented by following Formula (I):

wherein Cz¹ and Cz² each represent a carbazolyl group; Z represents a direct bond or an arbitrary linkage group enabling the conjugation of nitrogen atoms in the carbazole rings of Cz¹ and Cz² with each other; and Q represents a direct bond connecting to “G” in following Formula (II):

wherein Ring B¹ represents a six-membered aromatic heterocyclic ring having “n” nitrogen atom(s) as hetero atom(s); “n” represents an integer of from 1 to 3; G represents a direct bond or an arbitrary linkage group connecting to Q when G connects to Q; Gs connect to carbon atoms at the ortho-position and the para-position with respect to nitrogen atom(s) in Ring B¹; G represents an aromatic hydrocarbon group when G does not connect to Q; and “m” represents an integer of from 3 to 5.

The present invention provides a material having excellent hole injecting and hole transporting properties. Moreover, the present invention provides a light-emitting element and a light-emitting device using the material having excellent hole injecting and hole transporting properties. The present invention provides a carbazole derivative represented by the general formula (1). By applying the carbazole derivative of the present invention to a light-emitting element or a light-emitting device, a lower driving voltage, enhanced emission efficiency, a longer lifetime and enhanced reliability of the light-emitting element or the light-emitting device can be realized.

A novel arylamine compound represented by the following general formula (1):

wherein R¹ and R² each independently represent an alkyl group, an alkoxyl group, an aryl group, an arylalkyl group or an aryloxyl group, Ar¹ to Ar⁴ each independently represent an aryl group or a heterocyclic group, with provisos that at least two of Ar¹ to Ar⁴ each represent m-biphenyl group or a biphenyl group substituted with aryl groups and the others of Ar¹ to Ar⁴ each represent biphenyl group and that, when the biphenyl group substituted with aryl groups is a biphenyl group substituted with two aryl groups, the others of Ar¹ to Ar⁴ each represent an aryl group; and an organic electroluminescence device comprising a layer of organic compounds which comprises the novel arylamine compound. The organic electroluminescence device has a high luminance, excellent heat resistance and a long life and emits light at a high efficiency. The novel arylamine compound provides the advantageous properties to the organic electroluminescence device

The invention provides a triarylamine compound and an organic electroluminescent device thereof, and relates to the technical field of organic photoelectric materials. According to the invention, a substituted or unsubstituted 9-phenyl-fluorene group and a triarylamine group containing benzoxazole/benzothiazole/benzimidazole/benzotriazole undergoes a reaction to obtain the triarylamine compound by9-position (tertiary C) connection of fluorene. The triarylamine compound has a good hole transport capability, is high in glass transition temperature, good in thermal stability, good in film-forming property, high in refractive index and simple to synthesize, can be applied to an organic electroluminescent device to serve as a hole transport layer and/or a covering layer, can effectively solvethe problems of low luminous efficiency and short service life of the organic electroluminescent device, and has the advantages of high luminous efficiency and long service life.

The invention relates to a method for preparing 9,9-bis(trianilino) fluorene derivatives and their use. The derivatives can be prepared by Suzuki coupling of dihalogenated 9,9-bis(trianilino) fluorene and aromatic ring or heterocyclo-boric acid or its ester. And the derivatives can be used as auxiliary hole transportation materials of organic light emitting diode and can reduce the starting voltage of device.

It is an object of the present invention to provide a material which is excellent in a hole injecting property and a hole transporting property, and to provide a light emitting element and a light emitting device using a material which is excellent in a hole injecting property and a hole transporting property. The present invention provides a carbazol derivative represented by a general formula (1). The carbazol derivative according to the present invention is excellent in the hole injecting property. By using the carbazol derivative according to the present invention as a hole injecting material for a hole injecting layer of a light emitting element, a driving voltage can be reduced. In addition, a lower driving voltage, improvement of the luminous efficiency, a longer life time, and higher reliability can be realized by applying the material to a light emitting element or a light emitting device.

The invention provides an aromatic amine compound containing 9,9'-spirobifluorene and dibenzothiophene and an organic electroluminescent device thereof, and relates to the technical field of organic photoelectric materials. The compound has a simple preparation method, easily available raw materials, good hole transport capability and stability, can realize charge balance in a light-emitting layer, has a suitable highest occupied molecular orbital energy level, a high T1 value and a high refractive index, can remarkably improve the light emitting efficiency, the heat resistance and the servicelife of the device when applied to an OLED device, and can also effectively reduce the driving voltage of the device, thereby being an OLED material with excellent performance.

The invention relates to an organic electroluminescent material and an application thereof. The electroluminescent material has a molecular structure as shown in a formula (I), has relatively good thin film stability and suitable molecular energy level, can serve as a hole-transport material, and is applied to the field of organic electroluminescent.

The invention provides an aromatic amine compound containing 9, 9'-spirobifluorene and dibenzofuran and an organic electroluminescent device thereof, and relates to the technical field of organic photoelectric materials. The preparation method of the compound is simple, the raw material is easy to obtain, the aromatic amine compound has the highest occupied molecular orbital energy level, a high T1 value and a high refractive index, has good hole transporting ability, thermal stability and film forming properties, is applied to the OLED device, can significantly improve the luminous efficiency, heat resistance and service life of the device and can effectively reduce the driving voltage of the device.

The invention discloses a thiophene-bridged pyrenetetramine hole-transport material and application of the same to a perovskite solar cell. The thiophene-bridged pyrenetetramine hole-transport material has a structural formula as shown in a formula I which is described in the specification. The hole-transport material has a thiophene-bridged triarylated amine unit which presents good dissolvability and good film forming ability in an organic solvent, a large conjugate plane structure is beneficial for effective improvement of the hole mobility of the material, and preparation cost is low. Thetesting results of physical properties, electrochemical performance and heat stability prove that the hole-transport material has good heat stability and can match with the energy level of perovskite.When the hole-transport material is applied to the perovskite solar cell as a hole-transport layer, good photoelectric conversion efficiency is obtained.

The invention discloses an organic luminescence compound and an organic luminescence device thereof, and relates to the technical field of an organic photoelectric material. A conjugated system of theorganic luminescence compound is great, so that higher hole mobility is realized; good hole transmission performance is shown. In addition, the organic luminescence compound provided by the inventionalso has good thermal stability and solubility; the film forming of the material is facilitated. The organic luminescence device using the organic luminescence material as an organic matter layer hasthe advantages that the driving voltage is lower; the luminescence efficiency and luminescence brightness are high; the service life is longer.

The invention discloses fluorene derivative and an organic luminescent device thereof and relates to the technical field of organic photoelectric materials. The fluorene derivative disclosed by the invention has a larger conjugated system, so that the fluorene derivative has a higher hole mobility and shows better hole transmission performance. In addition, the fluorene derivative disclosed by theinvention further has better thermal stability and solubility, so that material film formation is facilitated. When the fluorene derivative is utilized as an organic luminescent device of an organismlayer, the fluorene derivative has lower driving voltage and higher luminous efficiency and luminance and further has longer service life.

The invention belongs to the technical field of organic materials, and particularly relates to a nitrogen-containing compound, an electronic component and an electronic device using the same. When thecompound provided by the invention is used as an electron blocking layer for preparing an organic light-emitting device, the service life of the organic light-emitting device can be effectively prolonged, and the light-emitting efficiency or the driving voltage is improved to a certain extent.

The invention provides preparation of a silver-doped nickel oxide film and an application of the nickel oxide film in a perovskite solar cell as a hole transport layer. The preparation of the silver-doped nickel oxide film includes: dissolving nickel nitrate hexahydrate and silver nitrate in a diethylamine-containing glycol solution, stirring the mixture at a room temperature for 12-16 h, preparing a mixed precursor solution of nickel nitrate and silver nitrate with the metallic ion total concentration of 0.5-1.5 M, wherein the ratio of Ag to Ni is 1-2:100; and performing spin coating of the mixed precursor solution of nickel nitrate and silver nitrate on a substrate with the rotating speed of 2500-3500 rmp, and then performing heating at the temperature of 300 DEG C for 60-80 min. According to the silver-doped nickel oxide film, the light transmission and the hole transport capability are better, the degree of crystallization and the surface coverage rate of the perovskite film grown on the silver-doped nickel oxide film are higher compared with the pure nickel oxide film, and the reverse planar perovskite solar cell prepared by the nickel oxide film as the hole transport layer is advantaged by higher photoelectric conversion efficiency and environmental stability.

The invention provides an aromatic amine compound and organic electroluminescent devices thereof, and relates to the technical field of organic photoelectric materials. According to the invention, a specific heteroaryl group and a bicyclic heptane group are introduced into a triarylamine structure to obtain the aromatic amine compound disclosed by the invention; the aromatic amine compound has good hole transport capability, high glass transition temperature, excellent thermal stability, excellent film-forming property, high refractive index and simple synthesis process, can be applied to theorganic electroluminescent devices as a hole transport layer and/or a covering layer, can effectively solve the problems of poor thermal stability, low luminous efficiency and short service life of the organic electroluminescent devices; and the advantages of high luminous efficiency and long service life of the organic electroluminescent devices are achieved.

The present invention discloses an “organic light-emitting device (OLED)”, comprising an anode, a cathode, and one or more organic layers, wherein the said organic layer contains at least one compound having the formula (I), and the said OLED has the advantages of excellent light-emitting efficiency, excellent color purity and long lifetime.

Disclosed is a novel benzimidazole compound having excellent hole injection and transport capabilities, light-emitting capabilities, and the like, and an organic electroluminescent device which comprises the benzimidazole compound in one or more organic material layers thereof so as to thereby achieve enhanced characteristics, such as light-emitting efficiency, driving voltage, and lifespan.

The invention discloses a fluorine-substituted organic micro-molecular hole-transport material and an application thereof. The material provided by the invention has a simple molecular structure, wherein benzodithiophene and derivatives thereof are used as a central core; different heterocycle-containing units are introduced to capping groups; and the central core and the capping groups are linkedby different fluorine-substituted phenyl groups. The material provided by the invention has the advantages of simple synthesis steps, easiness in purification, good solubility in an organic solvent,proper molecular energy levels, high hole mobility and electrical conductivity, and good hydrophobicity, is applied to perovskite solar cells with good stability and high short-circuit current densityand energy conversion efficiency, and has extensive application prospects.

The invention discloses a triphenylamine-benzothiophene organic small-molecule hole transporting material and an application thereof.The material has a specific heterocycle conjugated system and triphenylamine structural units with alkyl chains, and the solubleness and the hydrophobicity are good in an organic solvent; as the hole mobility can be effectively improved through a large two-dimensional conjugate plane structure, the material is applied to a perovskite solar cell, the stability of a device can be improved, the current density and the high photoelectric conversion rate are increased, and the material has the broad application prospects.