2891 results about "Electron transmission" patented technology

An organic light-emitting element having high efficiency and long lifetime is provided. An organic light-emitting body is provided which includes a host having a high electron-transport property (n-type host), a host having a high hole-transport property (p-type host), and a guest such as an iridium complex and in which the n-type host and the p-type host are located so as to be adjacent to each other. When an electron and a hole are injected to such a light-emitting body, the electron is trapped by the n-type host and the hole is trapped by the p-type host. Then, both the electron and the hole are injected to the guest, and thus the guest is brought into an excited state. In this process, less thermal deactivation occurs and the working rate of the guest is high; thus, highly efficient light emission can be obtained.

An organic electroluminescence display unit includes: a lower electrode for each device; a first hole injection / transport layer provided on the lower electrode for each device; a second organic light emitting layer of the first color provided on the first hole injection / transport layer for the second organic electroluminescence device; a second hole injection / transport layer provided on the entire surfaces of the second organic light emitting layer and the first hole injection / transport layer for the first organic electroluminescence device, and being made of a low molecular material; a blue first organic light emitting layer provided on the entire surface of the second hole injection / transport layer; and an electron injection / transport layer having at least one of electron injection characteristics and electron transport characteristics, and an upper electrode that are provided in sequence on the entire surface of first organic light emitting layer.

Disclosed is an improved biofuel cell having a cathode comprising a dual function membrane, which contains an oxygen oxidoreductase enzyme immobilized within a buffered compartment of the membrane and an electron transport mediator which transfers electrons from an electron conducting electrode to the redox reaction catalyzed by the oxygen oxidoreductase enzyme. The improved biofuel cell also has an anode that contains an oxidoreductase enzyme that uses an organic fuel, such as alcohol, as a substrate. An electric current can flow between the anode and the cathode.

The magnetic tape includes a magnetic layer containing ferromagnetic hexagonal ferrite powder, abrasive, and binder on a nonmagnetic support, wherein the ferromagnetic hexagonal ferrite powder exhibits an activation volume of less than or equal to 1,800 nm3, and inclination, cos θ, of the ferromagnetic hexagonal ferrite powder relative to a surface of the magnetic layer as determined by sectional observation by a scanning electron transmission microscope is greater than or equal to 0.85 but less than or equal to 1.00.

A thermoelectric structure and device including at least first and second material systems having different lattice constants and interposed in contact with each other, and a physical interface at which the at least first and second material systems are joined with a lattice mismatch and at which structural integrity of the first and second material systems is substantially maintained. The at least first and second material systems have a charge carrier transport direction normal to the physical interface and preferably periodically arranged in a superlattice structure.

An electrophotographic photoconductor having at least a photoconductive layer on an electrically conductive support, in which a surface layer of the photoconductive layer can be obtained by curing at least a free-radical-polymerizable monomer having no electron transporting structure, represented by general formula (A) and a one-functional free-radical-polymerizable compound having an electron transporting structure, wherein R71, R72, R73, R74, R75, and R76 are described in the specification.

A hot electron transistor includes an emitter electrode, a base electrode, a collector electrode, and a first tunneling structure disposed and serving as a transport of electrons between the emitter and base electrodes. The first tunneling structure includes at least a first amorphous insulating layer and a different, second insulating layer such that the transport of electrons includes transport by means of tunneling. The transistor further includes a second tunneling structure disposed between the base and collector electrodes. The second tunneling structure serves as a transport of at least a portion of the previously mentioned electrons between the base and collector electrodes by means of ballistic transport such that the portion of the electrons is collected at the collector electrode. An associated method for reducing electron reflection at interfaces in a thin-film transistor is also disclosed.

The application relates to the field of energy storage materials, and discloses a combined electrode with ultrahigh electron and ionic conductivity and a preparation method thereof. The combined electrode is formed in a manner that a battery active material is uniformly tied in a three-dimensional multi-hole network formed by carbon nano tubes which are connected in a crossing manner, and meshes and the surface of the active material are filled or coated with a solid electrolyte material. According to the combined electrode, the carbon nano tubes, which are communicated with one another, can form an ultrahigh electrical transmission network, on the one hand, a solid electrolyte can provide the ultrahigh lithium-ion transmission capacity while not influencing the connection of the carbon nano tubes and the conductive capacity of the electrode; on the other hand, the three-dimensional network formed by the carbon nano tubes is also fixed by virtue of the solid electrolyte, the formation of a solid electrolyte interface is controlled, and an active material is protected under the high charge-discharge voltage. The combined electrode has the high reversible capacity and the enhanced rate capability, and can meet the requirement of a power automobile or a mixed power automobile.

The invention discloses a chemical vapor deposition preparation method for a perovskite solar cell. The preparation method is characterized in that a compact layer TiO2 thin film is deposited on a surface on which the FTO thin film of FTO conductive glass is positioned so as to act as an electron transmission layer; a perovskite light absorption layer thin film is prepared on the electron transmission layer via a chemical vapor deposition method; a hole transmission layer is prepared on the perovskite light absorption layer thin film; and an Ag electrode or an Au electrode is vapor-deposited on the hole transmission layer to act as a top electrode so that the perovskite solar cell is obtained. The preparation method is simple and low in cost. The prepared perovskite light absorption layer thin film is high in quality, excellent in substrate coverage and great in stability and repeatability. Preliminary conversion efficiency of the prepared planar heterojunction perovskite solar cell can be 11%.

The invention discloses a series of organic electroluminescent materials, and a preparation method and an application thereof. A structural formula of the materials is shown as a formula I. The organic electroluminescent materials shown as the formula I have capacities of electron transportation and hole transportation. An organic electroluminescent device prepared by using the materials has a reduced starting voltage. The series of the materials have relatively good fluorescent quantum efficiency and electroluminescent efficiency, and relatively good film-forming property. Besides, the method for material synthesis and purification is simple and suitable for large-scale production. The organic electroluminescent materials are ideal selection for blue-light emitting materials of the organic electroluminescent device. Applications of the organic electroluminescent materials as luminescent materials independently or as main materials or doping dyes in luminescent layers are also in a protection range. The formula I is shown in the description.

The invention discloses a luminescent material of a series of fluorene derivatives. A structure of the material is as shown in formula I. The material as shown in formula I is easily dissolved in an organic solvent, is good in heat stability and can be used to prepare a luminescent device in a way of fluid manufacturing procedures such as printing, instilling, coating and printing. An organic electroluminescent device prepared by coating the material has the characteristics that the power efficiency is good, the material utilization rate is high, the manufacturing cost of an OLED device is greatly decreased, and the material synthesis and purification method is simply suitable for mass production, so that the luminescent material is an ideal choice of the organic electroluminescent device luminescent material. Utilizing the organic electroluminescent diode material as a main body material or a doping material in a luminescent layer or independently as a luminescent material or a hole transmission material or an electron transmission material also falls within a protection scope (see the specification).

The invention discloses a CsPbX3 inorganic perovskite quantum dot light-emitting diode (LED) prepared through a solution method. ITO glass is spin-coated with a PEDOT:PSS hole injection layer, then a hole transmission layer and metal halide perovskite quantum dots are spin-coated, and an electron transmission layer is deposited through heat evaporation or magnetron sputtering; afterwards, metal electrodes of the LED are deposited through heat evaporation, and the CsPbX3 inorganic perovskite quantum dot LED which gives out light evenly is obtained. The light-emitting color of the prepared quantum dot LED can be adjusted by changing the halogen ratio of a quantum dot light-emitting layer material and can cover the entire visible spectrum range.

The invention relates to neutral mononuclear copper (I) complexes for emitting light and with a structure according to formula (A) in which: M represents: Cu(I); L∩L represents: a single, negatively charged, bidentate ligand; N∩N represents: a diimine ligand (substituted with R and FG), in particular a substituted 2,2′-bipyridine derivative (bpy) or a substituted 1,10-phenanthroline derivative (phen); R represents: at least one sterically demanding substituent for preventing the planarisation of the complex in the excited state; FG=functional group, and represents: at least one second substituent for increasing solubility in organic solvents. The substituent can also be used for electron transport or alternatively for hole transport, said functional group being bound to the diimine ligands either directly or by means of suitable bridges; and the copper (I) complex: having a ΔE(S1−T1) value of less than 2500 cm−1 between the lowest excited singlet state (S1) and the triplet state (T1) which lies below; having an emission lifespan of at most 20 μs; having an emission quantum yield of greater than 40%, and a solubility of at least 1 g / L in organic solvents, in particular polar organic hydrocarbons such as acetone, methyl ethyl ketone, benzene, toluene, chlorobenzene, dichlorobenzene, dichloromethane, chloroform, dichloroethane, tetrachloroethylene, alcohols, acetonitrile or water.

The invention discloses and proposes a high-efficiency quantum dot light emitting diode with a self-assembly polymer hole transmission layer structure. Except a positive electrode and a negative electrode, the high-efficiency quantum dot light emitting diode comprises a three-layer structure: a hole transmission layer, a quantum dot light emitting layer and an electron transmission layer, wherein one end of the quantum dot light emitting layer is connected with the hole transmission layer, the other end of the quantum dot light emitting layer is connected with the electron transmission layer, the electron transmission layer is organic nanoparticles after doped, the hole transmission layer is formed by doping a monomer, a polymer, small-molecule, inorganic oxidized metal nanoparticles or a two-dimensional nanometer material into poly(3,4- ethylenedioxythiophene monomer), a quantum dot is quantum dots of zinc sulfide, zinc selenide, cadmium sulfide, cadmium selenide, cadmium telluride, mercury sulfide, mercury selenide, mercury telluride or core-shell nanometer structured cadmium selenide-zinc sulfide, cadmium sulfide-zinc sulfide, cadmium sulfide-zinc selenide and graphene thereof and the like, and the negative electrode is glass or polyethylene terephthalate (PET) with a layer of indium tin oxide (ITO) or fluorine-doped tin oxide (FTO) or graphene.

The invention provides a quantum dot light-emitting device and a display device and lighting device with the same. The quantum dot light-emitting device comprises a negative electrode, a first electron transmission layer to an n(th) electron transmission layer, a quantum dot light-emitting layer and a positive electrode which are sequentially arranged, wherein n is an integer and is more than or equal to 2 but less than or equal to 6, and in the first electron transmission layer to the n(th) electron transmission layer, the electron mobility rate of at least one layer in a second electron transmission layer to the n(th) electron transmission layer is smaller than the electron mobility rate of the first electron transmission layer. The electron mobility capability of the whole transmission layer material is reduced, thus, the electron mobility rate is reduced from the overall, the electron injection rate and the hole injection rate approximate to be relatively consistent, the luminous efficiency of the light-emitting device is improved, and the service lifetime of the light-emitting device is prolonged.

The invention belongs to the field of electroluminescent devices and particularly relates to a novel quantum dot luminescent device. The novel quantum dot luminescent device comprises an ITO anode, a hole injection layer, a hole transmission layer, a quantum dot luminescent layer, an electron transmission layer, an Al cathode and an insulating layer, wherein the insulating layer is arranged between the hole transmission layer and the quantum dot luminescent layer. The material of the insulating layer can be one or more of polymethyl methacrylate, calcium oxide, aluminum oxide, silicon oxide or gallium oxide and the like. Through the arrangement of the insulating layer, on one hand, injection of holes and electrons is effectively balanced; and on the other hand, the electric neutrality of quantum dots is ensured, so that the luminescence property of a blue-green quantum dot light-emitting diode is improved.

The invention discloses a method for preparing an active electrode material of a lithium ion battery. The method comprises the following steps of: preparing a nano-crystal with electrochemical activity into an aqueous solution, and adding a carbon source and a surface active agent into the aqueous solution to form a uniform and stable mixture solution; and preparing the mixture solution into spherical particles under the condition that the temperature is between 200 and 900 DEG C through a spray granulation method, and performing heat treatment on the spherical particles in 400-900 DEG nitrogen gas so as to form the active electrode material of the lithium ion battery. Conductive networks are distributed in the active electrode material, and the active electrode material has a porous structure, so that the active electrode material has good lithium ion and electron transmission channels; and the lithium ion battery prepared from the active electrode material has high specific capacity, high-current charging and discharging and high cyclical stability. The method for preparing the electrode material of the lithium ion battery through a spraying method can be easily applied to mass production, and is generally used for preparing various high-performance electrode materials of the lithium ion battery.

The invention relates to a perovskite thin-film photovoltaic cell and a manufacturing method of the perovskite thin-film photovoltaic cell. The perovskite thin-film photovoltaic cell is composed of a conducting transparent substrate, a perovskite light-absorbing layer, a hole transfer layer and a metal electrode. The perovskite thin-film photovoltaic cell has the advantages that the structure is quite simple, a traditional electron transfer layer which needs high-temperature sintering is omitted due to the fact that a perovskite material serves as the light-absorbing layer and achieves the electron transfer function, and a porous layer is not needed either; the perovskite material is high in light-absorbing performance, the whole cell is manufactured at a low temperature, the complicated processes such as high-temperature sintering are not needed, and therefore the manufacturing cost of the cell is effectively reduced; the great promotion function is achieved on the flexibility of the cell and the large-sized reel-to-reel printing manufacturing of the cell; the whole manufacturing technology of the cell is simple, the popularization of the technology is facilitated, high photoelectric converting efficiency (approximate to 14 percent) and good device stability are obtained particularly, and therefore the industrial application prospect is achieved.

The invention provides a QLED device and a preparation method thereof. The preparation method of the QLED device comprises the following steps: providing a substrate, and forming a bottom electrode on the substrate; depositing an electron transmission material on the bottom electrode, and carrying out the RTP treatment on the electron transmission material to obtain an electron transmission layer; depositing an interface decorative material on the electron transmission layer to form an interface decorative layer, wherein the interface decorative material is a material with a permanent dipole moment; and successively depositing a quantum dot luminescent layer and a top electrode on the interface decorative layer.

The invention provides an application of crosslinkable conjugated polymer materials in a flip organic photoelectric device. The conjugated polymer materials possess a conjugated main chain and functionalized side chain groups, wherein the functionalized side chain groups comprise a crosslinkable substituent group and a strong polar group possessing water alcohol solubility. Under the condition ofillumination or heating, the conjugated polymer materials can be processed to be insoluble and nonfusible interpenetrating polymer networks through using a strong polar solvent. When constructing a multilayer device, an interface miscibility phenomenon between layers can be overcome. The interpenetrating polymer networks can be regarded as materials of an electron injecting layer or an electron transmission layer to prepare a flip organic electroluminescent device or a flip organic solar cell device. The electron can be directly injected or extracted from a high work function transparency electrode. By using the crosslinkable conjugated polymer materials, processes of the flip organic electroluminescent device and the flip organic solar cell device can be simplified, and an object of preparing the efficient organic photoelectric device by using a low cost technology can be realized.

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.

In an electrophotographic photosensitive member, an undercoat layer contains a polymerized product of a composition including an electron transporting substance having a polymerizable functional group, and a crosslinking agent, and a metal oxide particle, and a mass ratio of the electron transporting substance in the composition to the metal oxide particle is 0.5 or more.

The invention belongs to the field of a solar cell, and discloses a perovskite solar cell. The perovskite solar cell sequentially comprises a transparent conductive substrate, an electron transmission layer, an interface modification layer, a modified perovskite active layer, a hole transmission layer and a positive electrode, wherein the electron transmission layer is a nanometer TiO2 particle layer, and the interface modification layer is a fullerene derivative layer. A sol-gel method is employed, high-crystallization TiO2 nanoparticles are synthesized by taking titanium tetrachloride is used as a precursor, the TiO2 nanoparticles are applied to the perovskite solar cell by employing a low-temperature annealing process, a fullerene derivative is directly spin-coated on a surface of the obtained nanometer TiO2 particle layer for modification, the defects in TiO2 and perovskite are passivated, a novel perovskite synthesis path is employed, the obtained perovskite solar cell has high efficiency and does not have hysteresis effect under a low-temperature preparation process, and the device can be used for stable transmission; and moreover, the related preparation method is simple, is low in energy consumption and is suitable for promotion and application.

The invention discloses a quantum dot light-emitting diode with a mixed HTL and a preparation method of the quantum dot light-emitting diode. The quantum dot light-emitting diode sequentially comprises an anode, a hole injection layer, a mixed hole transmission layer, a quantum dot light-emitting layer, an electron transmission layer, an electron injection layer and a cathode, wherein a material of the mixed hole transmission layer is obtained by blending and dissolving two or more hole transmission layer materials with different functions into a solvent. According to the preparation method, the two or more hole transmission layer materials with different functions are mixed to prepare a layer of mixed HTL, so that maximum utilization of the hole transmission layers under the premises of simplifying the preparation technology and saving the production cost is facilitated. In addition, the problem of low transmission / injection efficiency on the holes to the quantum dot light-emitting layer in a conventional QLED can be effectively solved; the lifetime and the stability of a device are strengthened; and the overall light-emitting property and the display property of the device are improved.

The invention discloses an organic photoelectric device, which comprises a substrate, an anode layer, a cathode layer, and an organic functional layer arranged between the anode layer and the cathode layer. The organic functional layer comprises one or more of a hole injection layer, a hole transmission layer, a luminous layer, an electron transmission layer, an electron injection layer, an anode buffer layer, an electron donor layer, an interface layer, an electron acceptor layer and an cathode buffer layer; the hole transmission layer and the electron donor layer are doped with magnetic multi-wall carbon nanotubes, or the electron transmission layer and the electro acceptor layer are doped with magnetic single-wall carbon nanotubes, or the hole transmission layer and the electron donor layer are doped with magnetic multi-wall carbon nanotubes and the electron transmission layer and the electron acceptor layer are doped with the magnetic single-wall carbon nanotubes simultaneously; and the length direction of the magnetic multi-wall carbon nanotubes and the magnetic single-wall carbon nanotubes is vertical to the surface of the anode layer. The device reduces the resistance of a carrier transmission layer, improves the carrier transmission capacity and the visible light transmissivity of the carrier transmission layer, and improves the photoelectric performance of the device.

A self-assembly process for preparing luminescent organic-inorganic nanocomposite thin films is disclosed. A homogeneous solution in water and an organic solvent is obtained containing a soluble silicate, a silica coupling agent, a surfactant, and an organic material having a hole transport, electron transport, and / or emissive material moiety. The silica coupling agent is selected to chemically react with the organic material. A film of the homogeneous solution is deposited onto a substrate. Preferentially evaporating the organic solvent enriches the concentration of water and non-volatile solution components to promote micelle formation. Organic materials migrate into the hydrophobic portion of the forming micelles. Continued evaporation promotes self-assembly of the micelles into interfacially organized liquid crystalline mesophases. Reacting the organic material and silica coupling forms a nanostructure self-assembly. Luminescent ordered nanocomposite structures prepared by the process, and organic-inorganic HLED devices fabricated from the luminescent organic-inorganic nanocomposite structures are disclosed.

The electron tunneling device includes first and second non-insulating layers spaced apart such that a given voltage can be provided therebetween. The device also includes an arrangement disposed between the non-insulating layers and configured to serve as a transport of electrons between the non-insulating layers. This arrangement includes a first layer of an amorphous material such that using only the first layer of amorphous material in the arrangement would result in a given value of a parameter in the transport of electrons, with respect to the given voltage. The arrangement further includes a second layer of material, which is configured to cooperate with the first layer of amorphous material such that the transport of electrons includes, at least in part, transport by tunneling, and such that the parameter, with respect to the given voltage, is increased above the given value of the parameter.

The invention discloses a quantum dot electroluminescent device and a preparation method thereof. The device comprises a first electrode layer, a second electrode layer as well as a hole injection layer, a hole transmission layer, an electron barrier layer, a quantum dot luminescent layer, a hole barrier layer and an electron transmission layer, wherein the hole injection layer, the hole transmission layer, the electron barrier layer, the quantum dot luminescent layer, the hole barrier layer and the electron transmission layer are sandwiched between the two electrode layers. The preparation method is characterized in that the electron barrier layer covers the hole transmission layer by utilizing a rotary coating method; the material of the electron barrier layer is preferably DNA-CTMA (deoxyribonucleic acid-cetyltrimethyl ammonium), thus the effective hole injection and efficient electron barrier are realized, and the device performances and luminescent color purity are improved greatly.