392results about How to "Enhanced electron transport capabilities" patented technology

The invention discloses a lithium ion battery phosphatic composite cathode material and a preparation method thereof. The composite material is a multinuclear core shell structure composed of a plurality of cores and a housing layer, the cores are lithium iron phosphate particles wrapped by lithium vanadium phosphate and the housing layer is amorphous carbon. Preparation of the lithium iron phosphate particles wrapped by lithium vanadium phosphate comprises the following steps: preparing precursor sol with a sol gel method, adding lithium iron phosphate powder to disperse uniformly, carrying out spray drying on the above mixture, calcining the above resultant in inert gas, and followed by cooling and grinding to obtain the lithium iron phosphate particles wrapped by lithium vanadium phosphate. Preparation of the composite cathode material comprises the following steps: dissolving a carbon source compound into deionized water, adding core materials, dispersing the above resultant uniformly, carrying out second spray drying, calcining the above resultant in inert gas, and followed by cooling to obtain the composite cathode material. The composite material prepared in the invention has good electronic conduction performance, good ionic conduction performance and excellent electrochemistry performance. Because of existence of lithium vanadium phosphate, energetic density of a material is raised. Because of the multinuclear core shell structure like nano/micro structures, the composite material has good processing performance, and tap density of the material is greatly raised.

An organic electroluminescence element including at least one organic layer including a light emitting layer, between an anode and a cathode, wherein at least one layer of the at least one organic layer contains at least one selected from specific nitrogen-containing heterocyclic derivatives, and at least one layer of the at least one organic layer contains a specific electron-transporting phosphorous light emitting material.

This invention discloses one static fabric processed fixed enzyme electrode and its method, which belongs to fixed enzyme electrode technique, wherein, the said enzyme electrode is composed of electrode base, reacting layer composed of polymer nanometer fiber film and oxidation and deoxidizing enzyme or the reacting layer is composed of polymer nanometer fiber film and oxidation and deoxidizing enzyme and metal particles with 5 to 100 nanometer electric activity or the reacting layer is composed of polymer nanometer fiber film and film oxidation and deoxidizing enzyme and electro medium.

The invention belongs to the field of organic electroluminescent material, and in particular relates to polyaryl substituted pyridine derivatives and a synthetic method thereof, as well as application to preparing organic electroluminescent devices by using materials of the polyaryl substituted pyridine derivatives. Through molecular design, the synthetic method introduces large substituting groups which have rigid structures to ensure that the large substituting groups are not easy to form a group excited compound, inhibits the crystallization processes of the large substituting groups, improves the film forming properties of the large substituting groups, and increases charge transfer performances of the large substituting groups; at the same time, destroy of molecular co-planarity makes the large substituting groups emit peak blue shift, so as to achieve the aim of improving the properties of the devices. The polyaryl substituted pyridine derivatives comprise a structural formula as above.

A light-emitting element which includes a plurality of light-emitting layers between a pair of electrodes and has low driving voltage and high emission efficiency is provided. A light-emitting element including first to third light-emitting layers between a cathode and an anode is provided. The first light-emitting layer includes a first phosphorescent material and a first electron-transport material; the second light-emitting layer includes a second phosphorescent material and a second electron-transport material; the third light-emitting layer includes a fluorescent material and a third electron-transport material; the first to third light-emitting elements are provided in contact with an electron-transport layer positioned on a cathode side; and a triplet excitation energy level of a material included in the electron-transport layer is lower than triplet excitation energy levels of the first electron-transport material and the second electron-transport material.

The invention discloses a preparation method of a three-dimensional dendritic TiO2 array with rapid electronic transmission performance. The preparation method comprises the steps as follows: 1), a one-dimensional nanometer TiO2 rod array with rapid electronic transmission performance is grown on the surface of a conductive substrate deposited with a TiO2 crystal seed layer with a hydrothermal method; 2), the one-dimensional nanometer TiO2 rod array obtained in the step 1) is subjected to surface treatment, and a three-dimensional dendritic structure is grown on a no-seed layer in an epitaxial manner with a water-bath method; and 3), an obtained sample with the three-dimensional dendritic structure is subjected to oxygen plasma cleaning and oxygen atmosphere sintering treatment, so that a three-dimensional dendritic TiO2 array nano-structure is obtained. According to the preparation method, the technological operation is simple, the cost is low, the controllability is high, grain boundaries and defects of the obtained TiO2 array are few, high electrical transmission rate and large specific surface area are provided, the TiO2 array can be used for a photo-anode of an photoelectric device, the device performance is improved greatly, and a good application prospect is provided.

Objects of the present invention are to provide the following: a novel heterocyclic compound which can be used as a material in which a light-emitting substance of a light-emitting layer in a light-emitting element is dispersed; a novel heterocyclic compound having a high electron-transport property; a light-emitting element having high current efficiency; and a light-emitting device, an electronic device and a lighting device each having reduced power consumption. Provided are a heterocyclic compound represented by General Formula (G1-1) or (G1-2) below, and a light-emitting element, a light-emitting device, an electronic device and a lighting device each including the heterocyclic compound. Such use of the heterocyclic compound represented by General Formula (G1-1) or (G1-2) makes it possible to provide a light-emitting element having high current efficiency, and a light-emitting device, an electronic device and a lighting device each having reduced power consumption.

The invention provides a novel compound which is represented by the formula (I), wherein the R1 to R5 are independently selected from a C1-C20 aliphatic alkyl group or a C6-C20 aromatic group; the Ar is selected from: a C4-C30 aromatic ring, a C4-C30 N-containing heterocycle, a C4-C30 condensed heterocyclic aromatic hydrocarbon, a C4-C30 aromatic amino group, or a C4-C30 aromatic oxy group; n is 1 or 2; A1 to A4 represent N atoms or C atoms, when the A1 and A3 represent N atoms at the same time, the A2 and A4 represent C atoms; or when the A1 and A4 represent N atoms at the same time, the A2 and A3 represent C atoms; or when the A2 and A4 represent N atoms at the same time, the A1 and A3 represent C atoms; or when the A3 and A4 represent N atoms at the same time, the A1 and A2 represent C atoms; or when the A1, A3, and A 4 represent N atoms at the same time, the A2 represents a C atom; and L represents a single bond, or a C6-C10 aromatic ring, or a C4-C10 N-containing heterocycle. The compounds are used as an electron transmission layer material or a luminous main material in organic electroluminescence devices.

The invention discloses a phosphine-containing benzophenone organic light-emitting material, a synthesis method and applications thereof, wherein the molecular general formula is Ar-Ar'-R, Ar is a phosphine-containing functional group, Ar' is benzophenone, and R is alkane, halogen, aromatic ring or aromatic heterocyclic substituent, and the like. According to the present invention, the synthesis method has advantages of simple process and easy purification, and the synthesized light-emitting material has good electron transmission performance and high fluorescence quantum efficiency, is suitable for preparing the light-emitting layer or electron transmission layer in organic electroluminescent devices, and can further be adopted as the light-emitting material and the electron transmission material in OLEDs, wherein the two layers in the classic OLEDs structure are integrated into one layer so as to simplify the OLEDs device structure and the preparation process; and the light-emitting material of the present invention specifically responds to oxygen, metal ions and the like, and is suitable for use in chemical detection, biological detection, biological imaging, anti-counterfeiting, and other fields.

Imidazopyridine-based compounds and organic light emitting diodes (OLEDs) including organic layers including the imidazopyridine-based compounds are provided. The organic light emitting diodes including organic layers having the imidazopyridine-based compounds have low driving voltages, high efficiencies, high luminance, long life-times and low power consumption.

The invention relates to a method for preparing a steroid immunosensor based on sheet black phosphorus and application and belongs to the technical field of novel biosensing and detection. The sheet black phosphorus is provided with a structure having the property similar to graphene and has good conductivity. Ionic liquid serves as a dispersing agent of the sheet black phosphorus and is applied to a base of the immunosensor. A porous PtAu alloy film is utilized to firm combine a base layer material and an antibody, and the stability of the sensor is enhanced. Base solution potassium ferricyanide is utilized as signals, and ultrasensitive detection of steroid is performed.

The invention belongs to the technical field of sensors, and particularly relates to a novel ammonia sensor and a preparation technology thereof. The novel ammonia sensor comprises a gas sensitive material and a substrate, wherein the gas sensitive material uniformly coats the surface of the substrate uniformly, and comprises the component of reducing graphene which is wrapped with a cobaltosic oxide composite nano material; the coating thickness of the gas sensitive material is 1micron-100microns. The ammonia sensor is relatively high in responsiveness of an ammonia gas, and meanwhile has the advantages of relatively good selectivity, flexibility and stability and relatively low operation temperature.

The invention provides a negative electrode active material for a lithium-ion/sodium-ion secondary battery, a negative electrode and a battery, belonging to the technical field of electrochemistry and batteries. The negative electrode active material comprises a phosphorus-germanium compound, or/and a first complex formed by the phosphorus-germanium compound and elementary P or/and elementary Ge, or/and a second complex formed by the phosphorus-germanium compound and conductive components, or/and a third complex formed by the first complex and conductive components. The negative electrode provided by the invention comprises the negative electrode active material. The negative electrode has the advantages of high specific capacity, high initial Coulomb efficiency, small charge-discharge voltage platform difference and good high-current charge-discharge performance.

In the invention, an organic electroluminescent element comprises a cathode, an anode, a light-emitting layer, a hole source and an electronic source. The light-emitting layer is disposed between the anode and cathode, and the hole source is disposed between the anode and the light-emitting layer. The electronic source disposed between the cathode and the light-emitting layer is made of at least one kind of organic material and at least one kind of salt. The salt has the concentration capable of changing with the space distribution in the electronic source, so that the concentration of the salt at the electronic near the cathode is higher than that at the electronic source near the light-emitting layer.

An object of one embodiment of the present invention is to provide a novel oxadiazole derivative as a substance having high excitation energy, in particular, a substance having high triplet excitation energy. One embodiment of the present invention is an oxadiazole derivative represented by General Formula (G1) below.

In General Formula (G1), R¹ represents either an alkyl group having 1 to 4 carbon atoms or a substituted or unsubstituted aryl group having 6 to 13 carbon atoms. In General Formula (G1), R²¹ to R²⁷ separately represent any one of a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, and a substituted or unsubstituted aryl group having 6 to 13 carbon atoms. In General Formula (G1), α represents a substituted or unsubstituted arylene group having 6 to 13 carbon atoms. In General Formula (G1), Z represents either a sulfur atom or an oxygen atom.

The invention discloses a quantum dot light emitting diode. The quantum dot light-emitting diode comprises an anode, a cathode and a quantum dot light-emitting layer arranged between the anode and thecathode, wherein the quantum dot light-emitting layer comprises a first quantum dot light-emitting layer, the first quantum dot light-emitting layer is made of a first composite material, and the first composite material comprises light-emitting quantum dots, first halogen ligands and first oil-soluble organic ligands, and the first halogen ligands and the first oil-soluble organic ligands are combined on the surfaces of the light-emitting quantum dots. Compared with the existing oil-soluble composite material of which the surface is pure oil-soluble organic ligands, in the oil-soluble firstcomposite material, the first halogen ligands can improve the electron transport property of quantum dots and improve the transport rate of carriers in a light-emitting layer, so that the electron transport rate and the hole transport rate in the light-emitting layer of a device are balanced, the light-emitting efficiency of the device is improved, the working voltage is reduced, and the service life of the device is prolonged.

According to the present invention, an electrophotographic photoreceptor comprising an intermediate layer is provided. The intermediate layer is a single layer and contains first metal oxide particles, second metal oxide particles having higher electron-transporting properties than those of the first metal oxide particle and a binder resin. The first metal oxide particles are unevenly distributed in the thickness direction of the intermediate layer.

The invention relates to a lithium ion battery anode Li3V2(PO4)3/C composite material and a preparation method thereof. In the method, a precursor solution of Li3V2(PO4)3/C can penetrate into a porous structure of a Ketjen Black (KB) porous carbon and then the porous structure is roasted to obtain the product. The Li3V2(PO4)3 particles in the Li3V2(PO4)3/C composite material prepared by the method in the invention has small size, meanwhile, the reaction temperature is low, the reaction time is short and the cost is low. The Li3V2(PO4)3 and carbon nano composite material can be used as an anode for the lithium ion battery, thus having better electrochemical performance.

The invention discloses an NaYF4:Ln<3+>/C/TiO2 composite photoanode and a preparation method thereof, and relates to a composite photoanode and a preparation method thereof. The photoanode and the method aim at solving the problem that a dye-sensitized solar cell assembled by the existing composite photoanode is low in photoelectric conversion efficiency. The composite photoanode is prepared by rare earth nanocrystallines, C quantum dots, TiO2 and FTO (Fluorine doped Tin Oxide) conductive glass. The preparation method comprises the steps that 1, a rare earth nitrate solution, a surfactant and a fluorine source solution are mixed and subjected to solvent heat treatment; 2, NaYF4:Ln<3+> nanocrystallines are obtained after washing and drying; 3, the nanocrystallines, the C quantum dots and PVP (Poly Vinyl Pyrrolidone) are mixed; 4, a mixed material is mixed with tetrabutyl titanate, and subjected to electrostatic spinning; 5, a composite micro fiber is prepared by roasting; 6, mixed sol is prepared; and 7, the surface of the FTO glass is coated with the mixed sol by a knife coating method, and the composite photoanode is prepared. The composite photoanodes are assembled to form the dye-sensitized solar cell, and the photoelectric conversion efficiency of the cell reaches 7%.

The present invention relates to bipolar bisthieno[3,2-b:2',3'-d] thiophene derivatives and applications thereof. According to the derivatives, bisthieno[3,2-b:2',3'-d] thiophene groups serve as a center; by oxidation of the sulfur atom at site 4 to form bisthieno[3,2-b:2',3'-d] thiophene-4-oxides and bisthieno[3,2-b:2',3'-d] thiophene-4,4-dioxides, the electron transport property of bisthieno[3,2-b:2',3'-d] thiophene is improved; and simultaneously, a carbazole derivative or an aromatic amine compound having a good hole transport property is respectively introduced into 2 and 6 sites of the oxidized bisthieno[3,2-b:2',3'-d] thiophene, combining the advantages of both. By regulating the molecular structures of different parts of the molecule, the bisthieno[3,2-b:2',3'-d] thiophene derivatives is allowed to have hole and electron transport properties to form a bipolar transport material. The bipolar bisthieno[3,2-b:2',3'-d] thiophene material has a twisted non-planar spatial structure, thus effectively preventing tight accumulation of molecules. Experimental results show that the material of the invention has a high thermal stability and a glass transition temperature, and the material is separately used as an electron transport material, a hole transport material and a luminescent material for organic electroluminescent devices, electroluminescence with very high color purity and efficiency can be obtained.

The invention discloses a preparation method of a core-shell Fe/Pd bimetallic nano-catalyst. In the preparation method, glassy carbon electrodes are used as working electrodes, nano-Fe is firstly deposited on the electrodes by an electrochemical deposition method, then the nano-Fe is dipped into a certain quantity of palladium chloride ion solutions for appropriate time so that the noble metal ions and the nano-Fe are partially replaced, and then residual liquid on the surfaces of the electrodes is washed out. The method has simple steps and is easily operated and can conveniently control theload and the appearance of the Fe deposited on the surfaces of the glassy carbon electrodes by controlling the growth time of finished core-core and the concentration of Fe ions in deposit liquid. Theprepared core-shell Fe/Pd bimetallic nano-catalyst has high catalytic activity and favorable effect on dechlorination for contaminants such as organic chloro compounds, and the like.