184results about How to "Lower energy gap" patented technology

An organic electroluminescence device comprising a cathode, an anode and at least one layer comprising a phosphorescent light emitting material and a host material which is sandwiched between the cathode and the anode and further comprising an electron injecting layer which is adhered to the light emitting layer and is capable of transporting electrons, wherein an ionization potential of the host material is 5.9 eV or smaller, and wherein an energy gap of the electron transporting material in the electron injecting layer is smaller than that of the host material in the light emitting layer or wherein a triplet energy of the electron transporting material in the electron injecting layer is smaller than that of the host material in the light emitting layer. It emits phosphorescent light with enhanced efficiency because it comprises a light emitting layer and an electron injecting layer both satisfying specified condition and employs a light emitting layer capable of electron transporting.

According to example embodiments, a graphene switching devices has a tunable barrier. The graphene switching device may include a gate substrate, a gate dielectric on the gate substrate, a graphene layer on the gate dielectric, a semiconductor layer and a first electrode sequentially stacked on a first region of the graphene layer, and a second electrode on a second region of the graphene layer. The semiconductor layer may be doped with one of an n-type impurity and a p-type impurity. The semiconductor layer may face the gate substrate with the graphene layer being between the semiconductor layer and the gate substrate. The second region of the graphene layer may be separated from the first region on the graphene layer.

The present invention is related to a depletion or enhancement mode metal transistor in which the channel regions of a transistor device comprises a thin film metal or metal composite layer formed over an insulating substrate.

The invention discloses a C60 triarylamine derivative of D-A type, and relative application in solar battery, wherein R1 and R2 are selected from hydrogen atom, halogen atom, nitryl, amidogen, alkyl, isoalkyl, alkoxy, alkylene, alkyne, alkyl aldehyde, alkyl ketone, pyridine or pyridine derivative, furan or furan derivative, imidazole or imidazole derivative, thiofuran or thiofuran derivative, aromatic radical or substituted aromatic radical, while R1 and R2 are not both hydrogen atoms. The inventive compound has significantly improved solubility than fullerene in organic solvent, to simplify the manufacture of large-area solar battery.

The invention discloses a simple, convenient, low-cost and high-efficiency method for enhancing the electrochemical performance of a TiO2 electrode. The method is used for reversely applying voltage to the TiO2 electrode, electrochemical reaction treatment is preformed in a two-electrode system by taking neutral, acidic or alkaline solution as electrolyte, a negative electrode of the two-electrode system is the annealed TiO2 electrode, and a positive electrode of the two-electrode system is a carbon rod. In the method, special equipment is omitted, H+ ions in the solution are driven by an electric field, doping and defects are directly led into the TiO2 electrode, the electrochemical performance of the TiO2 electrode is enhanced, TiO2 energy gaps are reduced, the light absorption rate is increased, and electrical conductivity of the electrode is improved. The original TiO2 structure (such as a TiO2 nanotube and a nanowire array) cannot be damaged, so that the TiO2 electrode can be more effectively applied to the field of energy storage, photocatalysis, solar cells, photochromatism and the like.

The present invention relates to a depletion or enhancement mode metal transistor in which the channel region of a transistor device comprises a thin film metal or metal composite layer formed over an insulating substrate.

Disclosed is a GaN LED structure with a p-type contacting layer using Al—Mg-codoped In1−yGayN grown at low temperature, and having low resistivity. The LED structure comprises, from the bottom to top, a substrate, a buffer layer, an n-type GaN layer, an active layer, a p-type shielding layer, and a p-type contacting layer. In this invention, Mg and Al are used to co-dope the In1−yGayN to grow a low resistive p-type contacting layer at low temperature. Because of the Al—Mg-codoped, the light absorption problem of the p-type In1−yGayN layer is improved. The product, not only has the advantage of convenience of the p-type contacting layer for being manufactured at low temperature, but also shows good electrical characteristics and lowers the operating voltage of the entire element so that the energy consumption during operation is reduced and the yield rate is increased.

A method of fabricating a nitride semiconductor light emitting device includes the steps of: depositing on a substrate a first n-type nitride semiconductor layer, a light emitting layer, a p-type nitride semiconductor layer, and p-type nitride semiconductor tunnel junction layer containing an indium, in this order; depositing a nitride semiconductor evaporation reduction layer on the p-type nitride semiconductor tunnel junction layer at the temperature of the substrate which is at most a temperature higher by 150° C. than that of the substrate in depositing the p-type nitride semiconductor tunnel junction layer, the nitride semiconductor evaporation reduction layer having a band gap larger than that of the p-type nitride semiconductor tunnel junction layer; and depositing a second n-type nitride semiconductor layer on the nitride semiconductor evaporation reduction layer at the temperature of the substrate which is higher than that of the substrate in depositing the nitride semiconductor evaporation reduction layer.

The present invention is related to a depletion or enhancement mode metal transistor in which the channel regions of a transistor device comprises a thin film metal or metal composite layer formed over an insulating substrate.

A disclosed conjugated polymer containing thienothiophene and di(benzothieno)benzodithiophene has the structural general formula shown in the specification. In the structural general formula, R1 and R2 are same and are H, C1-C10 alkyl or C1-C10 alkoxy, R3 is C1-C16 alkyl or C1-C16 alkoxy, and n is an integer of 5-60. According to the conjugated polymer containing thienothiophene and di(benzothieno)benzodithiophene, thienothiophene and di(benzothieno)benzodithiophene give play to synergistic effect, and help to further reduce the energy gap and expand the luminous absorption scope, and compared with conventional polymeric materials, the conjugated polymer containing thienothiophene and di(benzothieno)benzodithiophene has a relatively wide luminous absorption scope. The invention also discloses a preparation method of the conjugated polymer containing thienothiophene and di(benzothieno)benzodithiophene.

The invention discloses a D-A-A type C<^>N ligand compound as well as a C<^>N ring platinum complex and an application thereof. The D-A-A type C<^>N ligand compound is synthesized for the first time, and a D-A-A type C<^>N ring platinum complex is further synthesized on such a basis; when the D-A-A type C<^>N ring platinum complex is used as an electroluminescence materials to be applied to preparation of polymer near-infrared electroluminescence devices, the prepared near-infrared electroluminescence devices are high in light emitting efficiency and high in light emitting strength; by using the compound, the option range of near-infrared electroluminescence materials is widened.

The invention provides an organic dye and a photoelectric conversion device with the same. The organic dye has a structure shown in the specification, wherein n is an integer from 3 to 11; a plurality of Xes are independent respectively and are selected from groups consisting of the following components and combinations thereof; R is respectively independent H, halogen atoms, C1 to C18 alkyl, C1 to C18 alkoxy, C3 to C18 heterocyclic alkyl, C3 to C20 aryl, C3 to C20 heterocyclic aryl, C3 to C20 alcyl or C3 to C20 cycloalkyl; R1 and R2 are respectively independent the H, the halogen atoms, the C1 to C18 alkyl, the C1 to C18 alkoxy, the C3 to C18 heterocyclic alkyl, the C3 to C20 aryl, the C3 to C20 heterocyclic aryl, the C3 to C20 alcyl or the C3 to C20 cycloalkyl, or the R1 is connected with the R2 to form a loop with 5 to 14 elements; R3 is respectively independent the H, the halogen atoms, nitryl, amido, the C1 to C18 alkyl, the C1 to C18 alkoxy, C1 to C18 alkyl sulfide, the C3 to C18 heterocyclic alkyl, the C3 to C20 aryl, the C3 to C20 heterocyclic alkyl, the C3 to C20 alcyl or the C3 to C20 cycloalkyl; and Z is hydrogen, alkali metal or quaternary ammonium salt.

An organic electroluminescence device comprising a cathode, an anode and at least one layer comprising a phosphorescent light emitting material and a host material which is sandwiched between the cathode and the anode and further comprising an electron injecting layer which is adhered to the light emitting layer and is capable of transporting electrons, wherein an ionization potential of the host material is 5.9 eV or smaller, and wherein an energy gap of the electron transporting material in the electron injecting layer is smaller than that of the host material in the light emitting layer or wherein a triplet energy of the electron transporting material in the electron injecting layer is smaller than that of the host material in the light emitting layer. It emits phosphorescent light with enhanced efficiency because it comprises a light emitting layer and an electron injecting layer both satisfying specified condition and employs a light emitting layer capable of electron transporting.

The invention discloses an anthracene and benzothiadiazole copolymer, and a preparation method and application thereof. The anthracene and benzothiadiazole copolymer has a general molecular structure formula shown in (I), wherein R1 and R2 are selected from -H, substituted or unsubstituted C1-C40 alkyl, substituted or unsubstituted aryl, and substituted or unsubstituted heteroaryl, cyano or halogen; R3 and R4 are selected from -H, substituted or unsubstituted C1-C40 alkyl, substituted or unsubstituted C1-C40 alkoxy, substituted or unsubstituted C6-C40 aryl, substituted or unsubstituted C6-C40arylalkyl, and substituted or unsubstituted C6-C40 alkoxy or cyano; n is the polymerization degree and is a natural number ranging from 1 to 500; and Ar is an organic group with an electron donating property. The anthracene and benzothiadiazole copolymer disclosed by the invention has the advantages of low energy gap, high carrier mobility and wide spectral absorption range, and improves the photoelectric conversion efficiency. The preparation method of the anthracene and benzothiadiazole copolymer is simple in process, high in product yield, and easy to operate and control.

The invention relates to an asymmetric fluoreno imidazole derivative and a preparation method thereof. A structural formula of the derivative is as shown in the specification, wherein R1 is H and C1-C20 linear or branched alkyl; R2 is H and C1-C20 linear or branched alkyl; or more than 10 substituent groups in the structural formula are C5-C7 cycloalkyl. The alkyl on the periphery of the molecule of the derivative provided by the invention is conducive to overcoming solubleness reduction caused by a high planar rigidity structure of the molecule and improving the dissolving processing performance of the material molecule. The blue-light luminescent performance of the molecule is strengthened by introduced imidazole ring; meanwhile, conjugating of phi electrons on the framework of the molecule is further strengthened, so that an energy gap of the molecule is reduced; the derivative can play a certain role in overcoming the defects of poor chemical stability and the like of traditional organic small molecular materials, and can be widely applied to the fields of organic semiconductor materials, nonlinear optical materials, biochemical sensors and solar cells.

The invention belongs to the field of photoelectronic materials, and discloses a thiophene organic semiconductor material and a preparation method and application thereof. The copolymer has a general formula (P), wherein in the formula, x+y is equal to 2; x is more than or equal to 1, and y is more than 0 and is less than 1; n is more than 1 and is less than or equal to 100; R1 and R4 are alkyl having 1 to 20 carbon atoms; and R2 and R3 are hydrogen and alkyl having 1 to 20 carbon atoms or phenyl substituted by alkyl having 1 to 20 carbon atoms or alkoxy having 1 to 20 carbon atoms or are thephenyl. Compared with the prior art, the invention has the advantages that: the organic semiconductor material is prepared by polymerizing a cyclopentadiene [2,1-b:3,4-b'] bithiophene unit, a thiophene unit and a quinoxaline unit, so the carrier mobility of the organic semiconductor material is increased, spectral response is broadened, and the organic semiconductor material has high carrier transmission property and electrochemical property; and the alkyl and the like can be introduced by a simple and convenient method to improve solubility. The preparation process of the semiconductor material is simple and easy to operate and control, and is suitable for industrial production.

The present invention provides a polymer containing thienothiophene-cyclopentadithiophene, a preparation method and an application thereof. The polymer is a polymer P having the following general formula, wherein R1 and R2 are the same or different H, C1-C12 alkyl or C1-C12 alkoxy, R3 and R4 are the same or different H or C1-C12 alkyl, R5 is C1-C12 alkyl or C1-C12 alkoxy, R6 is H or F, and n is a natural number of 10-70. According to the present invention, the polymer contains the new cyclopentadithiophene and thienothiophene unit, has the new conjugate plane structure, has characteristics of excellent sunlight matching property, excellent carrier mobility property and simple and controllable preparation method, and has good application prospects in the fields of polymer solar cells, organic electroluminescent devices and other optoelectronic materials. The polymer P is as the follow.

The invention discloses a preparation method and an application for sandwich type coordination compounds made from condensed bicyclo[2.2.2]octo diene porphyrin and rare earth metal gadolinium, which serve as light-absorbing materials at a visible light band in photoelectric functional material. The obvious red shift of the Soret spectral band and Q spectral band of the compounds relative to an octa-ethyl porphyrin-gadolinium coordination compound shows that the further extension of a pi conjugated system in a porphyrin ring causes the reduction of an HOMO-LUMO energy gap. Thus, the compounds 1 and 2 can have greater use to serve as light-absorbing materials at a visible light band in photoelectric functional material.

The invention relates to a conjugated polymer represented by the formula (P); wherein the R1 represents an alkyl group with a carbon number of 6 to 15, the R2 represents an H atom or an alkyl group with a carbon number of 1 to 16, the R3 represents an alkyl group with a carbon number of 1 to 17, and n is a natural number in a range of 5 to 60. The invention also relates to a preparation method and applications of the conjugated polymer. An acyl group is introduced into the a-position on one thiophene ring of benzotrithiophene, and then the length of alkanoyl can be adjusted so as to modulate the solubility and electron density of the conjugated polymer. Dithienobenzooxadiazole is an excellent electron acceptor unit. Benzotrithiophene is taken as the donor unit, an electron pushing-pulling effect between the donor unit and the strong electron acceptor unit (dithienobenzooxadiazole) reduces the energy gap of the conjugated polymer, and thus the light absorption range of the conjugated polymer is largely increased.

The invention discloses a vanadium pentexide modified nano composite material capable of decomposing oil fume. The material comprises the following components by weight: 80 to 120 g of nanometer anatase titanium dioxide, 10 to 15 g of tungsten trioxide, 20 to 65 g of vanadium pentexide, 500 to 1,000 g of water, and 5 to 20 g of sodium hexametaphosphate. The material can be spread on a range hood to decompose the oil fume into carbon dioxide gas and vapor to volatilize the oil fume without cleaning in any mode and kill other viruses and bacteria in a kitchen to protect the environment.

The invention provides a sulfothiazole-dithienopyrrole-benzodithiophene-containing copolymer and its preparation method and use. The sulfothiazole-dithienopyrrole-benzodithiophene-containing copolymer is a compound P having the structural formula shown in the description and in the structural formula, R1 represents H, C1-C16 straight chain or branched chain alkyl, or C1-C16 straight chain or branched chain alkylmercapto group, R2 represents C1-C12 straight chain or branched chain alkyl or other groups shown in the description, R' represents C1-C12 straight chain or branched chain alkyl and n is an integer of 5-60. The sulfothiazole-dithienopyrrole-benzodithiophene-containing copolymer contains 4,8-bis(1,3-dithiol-2-aldehyde)benzo[1,2-b: 4,5-b']dithiophene derivative, sulfothiazole and dithienopyrrole units, has a high solar spectrum matching degree, and improves energy conversion efficiency.

The present invention discloses one kind of two-dimensional conjugated polymer and its preparation process and application. The two-dimensional conjugated polymer has structure as shown, lowered polymer energy gap, expanded absorption spectrum, and wide application foreground in photoelectronic device, especially polymer solar cell.

The invention provides synthesis of a tetrastyryl indole compound and a novel application to tumor therapy, and particularly relates to design and synthesis of the tetrastyryl indole compound, preparation of a nano-support, synthesis of a nano composite drug and an application to preparation of an anti-tumor photosensitive drug based on photodynamic and photothermal collaborative treatment. Tetrastyryl is taken as the center, methoxy and indole groups are introduced to serve as an electron donor and a receptor respectively, the energy gap value of molecules is reduced, molecules with higher singlet oxygen quantum yield are obtained and linked to surfaces of polydopamine nanoparticles under the action of hydrogen bonds and pi-pi bonds, and a nanocomposite with mitochondrion targeted imagingas well as photodynamic and photothermal dual activity is constructed. The photodynamic and photothermal collaborative effect of the nanocomposite under the action of illumination is proved on the cell and animal levels, and photoinduced tumor ablation is realized.

The present invention relates to an alumina-supported modified nanometer titanium dioxide particle composite material, a preparation method and applications thereof. According to the present invention, alumina is used as a carrier, and carrier preparing, modified nanometer titanium dioxide sol preparing, modified nanometer titanium dioxide particle loading, drying and other processes are performedto obtain the kitchen oil stain removing agent with functions of kitchen oil stain removing and water absorption, wherein the modified titanium dioxide can improve the problems of narrow light response range and low quantum efficiency of titanium dioxide; and the prepared kitchen oil stain removing agent has strong adsorption capacity, can remove oil stain while absorb moisture and partial harmful gases, can be recycled, is pollution-free, and can be used for purifying kitchen air and reducing the emission of oil fume.

Provided are an organic EL device which is practically satisfactory in terms of a light-emitting characteristic, a driving voltage, and durability, and a compound for organic EL devices to be used in the device. The organic EL device is an organic EL device produced by laminating, on a substrate, an anode, a plurality of organic layers including a light-emitting layer, and a cathode, the organic EL device containing, in at least one organic layer selected from the light-emitting layer, a hole-transporting layer, an electron-transporting layer, a hole-blocking layer, and an electron-blocking layer, a boron compound having two indolocarbazolyl groups in a molecule thereof. The boron compound is represented by Y-L-B(A)a-L-Y or Y-L(Z)b-Y, where Y represents an indolocarbazolyl group, L represents an aromatic group, and Z represents a boron-containing group.

The invention discloses a TiO2 nanotube array intertube-space filled polyethylenedioxythiophene composite material, and a preparation method and application thereof. The composite material is composed of independently separate TiO2 nanotube array intertube-space filled polyethylenedioxythiophenes. The preparation method sequentially comprises the following steps: carrying out secondary anodizing to obtain an independently separate TiO2 nanotube array; by using the independently separate TiO2 nanotube array as an anode and a platinum filament as a cathode, and carrying out constant-potential or constant-current electro-polymerization in a 0.1-5mM 3,4-ethylenedioxythiophene and 0.1-5mM sodium lauryl sulfate water solution to obtain the selective TiO2 nanotube array intertube-space filled polyethylenedioxythiophene composite material. The composite material can be used as a photoelectric electrode, and used in the fields of water-photolysis hydrogen production, environmental pollution treatment and dye-sensitized solar cells.

The invention relates to the field of a sensor electrode material. The invention discloses a preparation method of a flexible sensor electrode modified by molybdenum disulfide quantum dots. A flexible conductive thin film is prepared by a solution mixing method, wherein acrylonitrile-butadiene-styrene resin is used as a flexible substrate, poly 3,4-ethylenedioxythiophene-polystyrolsulfon acid-graphene is used as a conductive material, and an electrode is modified by the molybdenum disulfide quantum dots so as to obtain the flexible sensor electrode. The sensor electrode disclosed by the invention has the advantages of more excellent conductivity, high sensitivity and flexibility, and can be applied to the fields of medical biological monitoring, environment and hygienic monitoring and the like.

A particle detector assembly includes a superconducting absorber to which is coupled superconducting tunnel junction detectors for detecting particles incident on the absorber. Each superconducting tunnel junction detector includes superconducting tunnel junction devices connected in parallel.