160results about How to "High charge transport performance" patented technology

The present invention relates to an organic electroluminescent (OEL) compound that comprises at least one fluorene derivative and at least one carbazole derivative. The compound has good electrical properties, light emitting properties and charge transport ability, and thus is suitable as a host material suitable for fluorescent and phosphorescent dopants of all colors including red, green, blue, white, etc., and as a charge transport material. An OEL display device that uses an organic layer that includes the OEL compound has a high efficiency, a low voltage, a high luminance, and a long lifespan because it has superior current density.

The present invention is related to an imidazole ring-containing compound and an organic electroluminescence (EL) display device using the same. In particular, the imidazole ring-containing compound may be used alone or in combination with a dopant as a material for organic films such as an electroluminescent layer. The organic EL display device using an organic film made of the imidazole ring-containing compound has improved characteristics such as luminance, efficiency, driving voltage, and color purity.

The invention discloses a method for regulating river branch black and odorous water bodies by using a graphene modified nano titanium dioxide photocatalyst fiber net. The method comprises the following steps: (1) preparing a reduction-oxidation graphene modified nano titanium dioxide hetero-structure composite photocatalyst; (2) preparing a water-resistant and impact-resistant aluminum-based crosslinking agent to form a homogeneous mixture with the catalyst, adding the homogeneous mixture into fiber stuff for producing a high-density polyethylene fiber net, or also preparing a high-density polyethylene fiber net provided with a nano photocatalysis film coating; (3) performing natural drying in the air, and then performing drying at a constant temperature in a drying room; and (4) arranging the graphene modified nano titanium dioxide photocatalyst high-density polyethylene fiber net on a river branch to contact with the water surface and receive illumination at the same time so as to control the river branch black and odorous water bodies. The method disclosed by the invention does not need aeration oxygenation, is energy-saving and environment-friendly, and is lower in cost and simpler in process.

The invention provides an organic semiconducting polymer and a solar battery comprising the same. The organic semiconducting polymer has a structure as shown in a chemical formula (1).

An organic electronic device comprises at least two electrodes and a semiconducting layer comprising a mixture of at least one hole-transporting semiconducting material and at least one electron-transporting semiconducting material, wherein at least one of said semiconducting materials is in the form of semiconducting polymer brushes which are attached to the surface of at least one of said electrodes and are in contact with at least one of said other semiconducting materials. Also provided is an organic electronic device comprising at least two electrodes and a semiconducting layer comprising at least one hole-transporting or electron-transporting semiconducting material, wherein said at least one semiconducting material is in the form of semiconducting polymer brushes which are attached to the surface of at least one of said electrodes. Processes for the manufacture of said devices are also provided.

A preparation method of a CuO micro-/nano-array electrode for a lithium ion battery relates to a preparation method of an anode material for the lithium ion battery. According to the preparation method, the technical problem that cycle performance and rate capability of the cathode material CuO for the lithium ion battery are poor in the prior art is solved. The preparation method comprises the following steps: 1. preparing Cu(OH)2 arrays; 2. placing the Cu(OH)2 arrays in an inert atmosphere, preserving heat, then naturally cooling the arrays to the room temperature to obtain the product. According to the prepared CuO micro-/nano-array electrode, each CuO nano-array is connected with a current collector substrate, so that the array electrode has good electrical conductivity and charge transfer performance. The method is beneficial for enlarging contact area between electrode and electrolyte, shortening diffusion path of lithium ions, slowing down volume change and stress action of electrode materials during charging or discharging, and representing excellent electrochemical performance, thereby improving the cycle performance and rate capability.

Photorefractive compositions are described. The compositions exhibit the following performances: a) Response time is less than 100 msec.; b) Initial diffraction efficiency is higher than 30%; and c) Grating holding ratio which is defined as [η(4 min.)/η(initial)]×100 is higher than 10%, wherein the η(4 min.) is a diffraction efficiency after 4 minutes and the η(initial) is an initial diffraction efficiency.

The invention discloses a yellow-light electroluminescent material based on an 8-hydroxyquinoline zinc metal complex tripolymer and a controllable preparation method thereof. According to the controllable preparation method, an electron-withdrawing group and an electron-donating group are simultaneously introduced to a 8-hydroxyquinoline ligand, the electron-withdrawing group has the effects of reducing the electron cloud density of a pyridine ring and enhancing the charge transmission property of the pyridine ring, and the electron-donating group has the function of enhancing the solubility of a complex. The controllable preparation method disclosed by the invention realizes the controllable preparation of a single-crystal structure of the 8-hydroxyquinoline zinc metal complex tripolymer, and the maximum absorption peak of the single-crystal structure is in a yellow-light emitting area of 588 nanometers. The yellow-light electroluminescent material disclosed by the invention has the advantages of good solubility property, good film-forming property, high yield, high luminous efficiency, good stability and low cost and can be used for conveniently processing and manufacturing a large-area display device.

The invention provides a thianthrene compound with a structure represented by the formula (I) in the description. Ar1 and Ar2 are independently selected from any one of a single bond, substituted or unsubstituted phenyl, substituted or unsubstituted naphthyl, substituted or unsubstituted anthryl, substituted or unsubstituted phenanthryl, substituted or unsubstituted acenaphthylene and substitutedor unsubstituted heteroaromatic ring; m is 0 or 1; D1 and D2 are independently selected from aryl or heteroaryl, and Ar2 and Ar3 are independently selected from aryl or heteroaryl. The thianthrene compound contains sulfur element and has high polarizability, and a material with high refractive index is obtained; the sulfur atom has good polarizability and high electron richness, so that the fusedring organic compound material has good charge transport properties and electron donating properties and is quite applicable as a capping layer (cathode cap layer, CPL) material.

The invention discloses a quinoxaline-based conjugated polymer, and a preparation method and application thereof. The structural formula of the quinoxaline-based conjugated polymer provided by the present invention is as shown in a formula I. The present invention provides a quinoxaline-based medium-band-gap conjugated polymer material, and the material exhibits perfect complementarity in solar absorption with narrow-band-gap n-type small molecule acceptor materials, has a suitable electron energy level and better charge transport performance, and thus can be applied to polymer solar cell devices as an electron donor material through matching with the narrow-band-gap n-type small molecule acceptor materials. Since the quinoxaline-based conjugated polymer has simple synthesis steps and high yield and the prepared polymer solar cell device has a wide spectral response range, a high open circuit voltage and a high filling factor, the quinoxaline-based conjugated polymer is expected to becommercialized in polymer solar cells.

Disclosed is a charge-transporting material comprising a heteropoly acid compound such as phosphomolybdic acid as a charge-transporting substance. Also disclosed is a charge-transporting varnish comprising the charge-transporting material and an organic solvent, wherein the charge-transporting substance is dissolved in the organic solvent. It becomes possible to provide a charge-transporting material which comprises a substance having high solubility in an organic solvent, charge-transporting properties, and an ability to oxidize hole transport materials, and a charge-transporting varnish comprising the charge-transporting material.

The invention provides a benzoheterocyclic compound. The benzoheterocyclic compound has a structure represented by formula (I); and in the formula, R1 is any one of hydrogen atom, a C1-C20 alkyl group, a C1-C20 alkoxy group, a phenyl group, a naphthyl group, an anthryl group and a phenanthryl group, Y1 and Y2 are respectively independently selected from a carbon atom, an oxygen atom and a sulfur atom, one of the Y1 and Y2 is the carbon atom, Ar1 is a single-bond or monosubstituted or unsubstituted group of any one of a phenyl group, a naphthyl group, a fluorenyl group, a phenanthryl group, anacenaphthenyl group and an aromatic heterocyclic ring, m is 0 or 1, D1 and D2 are respectively independently selected from an aryl group or a heteroaryl group, and Ar2 and Ar3 are respectively independently selected from an aryl group and a heteroaryl group. The benzoheterocyclic compound can be used as a material for a capping layer (CPL) of an OLED device to obtain a high light extraction efficiency and avoid the problem of reduction of the color purity of the blue light-emitting device.

Disclosed is an organic electroluminescent device (organic EL device) which is improved in luminous efficiency, fully secured of driving stability, and simple in structure and also disclosed is a heterocyclic compound useful for the said device. Specifically, the heterocyclic compound is represented by the following general formula (I) and the organic EL device comprises an organic layer containing the said heterocyclic compound. In general formula (I), X₁ and X₂ respectively denote O, S, or N—R, R denotes a hydrogen atom, an alkyl group, or a substituted or unsubstituted aryl group, Ar₁, Ar₂, Ar₃, and Ar₄ respectively denote a substituted or unsubstituted aryl group, Ar₁, Ar₂, and the nitrogen atom bonded thereto or Ar₃, Ar₄, and the nitrogen atom bonded thereto may form a nitrogen-containing hetero ring, and m and n respectively denote an integer of 1 or 2.

The present invention provides a charge transport film which is prepared through subjecting a coating film including at least one charge transporting agent to an atmospheric pressure plasma treatment, wherein electron transfer between the charge transport film and a substance that contacts with the charge transport film is promoted, and deterioration in performance due to diffusion and mixing or crystallization of low molecular weight components, such as a charge transporting agent, incorporated in a cured film is suppressed also in the case of film formation by a wet method, and which exhibits excellent charge transportability and stability over time; a production method with good productivity; and a light-emitting element and photoelectric conversion element equipped with the charge transport film, the atmospheric pressure plasma treatment being preferably a treatment that applies plasma, which is generated using a plasma generating apparatus and conveyed using an inert gas, to the coating film.

Provided are a carbazole-based compound represented by Formula 1 below and an organic light-emitting device including an organic layer including the carbazole-based compound:

A novel fluorene-containing compound and an organic electroluminescent device including an organic layer employing the same. The fluorene-containing compound has excellent electrical characteristics and an excellent charge transporting capability, and so can be used as a hole injecting material, hole transporting material, and/or emitting material that is suitable for all-color fluorescent and phosphorescent devices, such as red, green, blue, and white fluorescent and phosphorescent devices. Accordingly, an organic electroluminescent device employing the fluorene-containing compound has high efficiency, a low driving voltage, high brightness, and a long lifetime.