195results about How to "Improve carrier transport performance" patented technology

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 relates to a high luminance, high efficiency indole 3,2-b carbazole derivatives organic electroluminescenct material, belonging to the organic electroluminescent material technical field. The general structural formula of the indole 3,2-b carbazole derivatives organic electroluminescent compound is in the picture; in which, R3, R7 is alkyl or the substitute aryl, R1, R2 or R4-R6, R8 is hydrogen atom, benzene, naphthaline, anthracene, fluorine, carbazole, triarylated amine, thiophene, pyridine, pyran, quinoline, pyrrole, furan or imidazole. The compound of the invention has high fluorescence in both solution and solid film and has high film forming ability, thermal stability and photostability.

The invention disclose a preparing method of functional material based on branched structure of three carbazole and application in organic electronic material technique domain, which is characterized by the following: choosing three carbazole derivant as skeleton of branched structure molecular; choosing fluorescent light chromogen as functional group; grafting to the surrounding of the skeleton; getting the functional molecular compound with three arms or six arms structure; adopting microwave auxiliary method to prepare this material. This material possesses precise structure and good heat endurance, which can be used to solar battery and organic fieldistor.

Provided is a novel compound or a light-emitting element with high emission efficiency. The provided novel compound includes a bicarbazole skeleton and a benzofuropyrimidine skeleton or a benzothienopyrimidine skeleton. The provided light-emitting element includes the compound.

The invention discloses a contact-passivation crystalline silicon solar cell structure and a preparation method thereof and belongs to the technical field of a solar cell. An N-type silicon wafer or aP-type silicon wafer is used as a substrate of the solar cell; a structure of an illuminated surface of the N-type silicon wafer substrate sequentially includes a P+ diffusion layer, a silicon oxideor aluminum oxide, silicon nitride film and a grid line electrode from bottom to top; a structure of a back surface of the N-type silicon wafer substrate sequentially includes silicon oxide or aluminum oxide, an metal nanoparticle coated aluminum oxide film, an N-type polycrystalline silicon, the silicon nitride film and the grid line electrode from top to bottom; a structure of an illuminated surface of the P-type silicon wafer substrate sequentially includes an N+ diffusion layer, the silicon oxide film, the silicon nitride film and the grid line electrode from bottom to top; a structure ofa back surface of the P-type silicon wafer substrate sequentially includes silicon oxide or aluminum oxide, the metal nanoparticle coated aluminum oxide film, a P-type polycrystalline silicon, the silicon nitride film and the grid line electrode from top to bottom; the mutual synergistic effect exists between stacked layers; and the obtained solar cell is capable of remarkably improving the cellefficiency.

A novel substance with which an increase in life and emission efficiency of a light-emitting element can be achieved is provided. A carbazole compound having a structure represented by General Formula (G1) is provided. Note that a substituent which makes the HOMO level and the LUMO level of a compound in which a bond of the substituent is substituted with hydrogen deep and shallow, respectively is used as each of substituents in General Formula (G1) (R1, R2, Ar3, and α3). Further, a substituent which makes the band gap (Bg) and the T1 level of a compound in which a bond of the substituent is substituted with hydrogen wide and high is used as each of the substituents in General Formula (G1) (R1, R2, Ar3, and α3).

The invention provides a fused ring non-fullerene acceptor material, and a preparation method and an application thereof. The fused ring non-fullerene acceptor material comprises an electron donatingunit and electron withdrawing end groups, the electron donating unit is a carbon-oxygen bridge trapezoidal fused ring structure, the electron withdrawing end groups are connected to two ends of the electron donating unit, and the fused ring non-fullerene acceptor material has a structure represented by formula I or formula II. The prepared fused ring non-fullerene acceptor material prepared through the preparation method has excellent light absorption and carrier transport properties, can be easily dissolved in common organic solvents, has strong visible near-infrared absorption property and high electron mobility (being more than or equal to 10<-5> cm<2>.V<-1>.s<-1>), realizes a high short-circuit current and a high energy conversion efficiency in organic solar cells, and has a broad application prospect and high application values.

A light-emitting element with high emission efficiency is provided. In addition, a light-emitting element having a low driving voltage is provided. Furthermore, a novel compound which can be used for a transport layer, a host material, or a light-emitting material of a light-emitting element is provided. A novel compound including a benzothienopyrimidine skeleton is provided. Furthermore, a light-emitting element including a pair of electrodes and an EL layer sandwiched between the pair of electrodes is provided. The EL layer contains a substance including the benzothienopyrimidine skeleton.

The invention relates to a novel D-A'-PI-A polymer metal complex sensitizer (as shown in a formula I) taking 8-hydroxyquinoline derivative Cu (II) as an auxiliary electron acceptor, a preparation method of the sensitizer and application of the sensitizer to dye-sensitized solar cells. The sensitizer takes derivates of IDT (indacenodithiophene) or CZ (carbazole) as electron donors (D), 8-hydroxyquinoline derivative Cu (II) complexes serve as A' and pi bridges respectively, cyanoacrylate serves as an electron acceptor (A) and an anchor group, and Yamamoto polymerization is performed to obtain sensitizers PIDT-QCu and PCZ-QCu. The D-A'-PI-A sensitizer taking high-electrophilicity 8-hydroxyquinoline derivative Cu (II) complexes as the auxiliary electron acceptor A' is synthesized successfully. According to photovoltaic performance tests, the sensitizer is excellent in photovoltaic performance and thermal stability and has a promising application prospect.

The invention discloses an organic electroluminescent device comprising a first electrode, a second electrode and a layer of or a plurality of layers of organic layers located between the first electrode and the second electrode. The organic layer at least comprises a luminescent layer and an electronic transmission layer; the electronic transmission layer is 5-100 nm in thickness, and the electronic transmission layer contains at least one compound represented by the formula (I), wherein L1 and L2 are independently selected from chemical bonds, C6-C12 arylene or sub-polycyclic aromatic groups, and C3-C12 heteroarylene or sub-polyheterocyclic aromatic groups respectively; R1, R2, R3, R4 and R5 are independently selected from hydrogen, halogen, cyano groups, nitro groups, C1-C10 alkylene, C6-C30 substituted or non-substituted aryl or polycyclic aromatic groups, and C3-C30 substituted or non-substituted heteroaryl or polyheterocyclic aromatic groups respectively, and R2 and R5 can be connected with each other to form a ring structure; Ar1 and Ar2 are independently selected from C6-C30 substituted or non-substituted aryl or polycyclic aromatic groups, and C3-C30 substituted or non-substituted heteroaryl or polyheterocyclic aromatic groups respectively. The organic electroluminescent device has the advantages of low working voltage and high luminescent efficiency.

This invention relates to an organic electro-luminance device OLED containing a substrate, an anode and a cathode on it, and organic function layer between the anode and cathode including a luminance layer which is composed of two host materials to be isomer to each other or homogloue or analogue. This invention also provides a blue OLED device with the best luminance efficiency and colority. The host material of each component in this invented device luminance layer can be prepared by dual mixed steam, combination of the host materials can be luminance material directly or doped with dye as the carrier transfer materials.

The invention provides an organic electroluminescent device and a display device. The organic light-emitting device comprises a first light-emitting layer and a second light-emitting layer, wherein the material of the first light-emitting layer comprises a first main body material, a first sensitizer and a first dye, and the material of the second light-emitting layer comprises a second main bodymaterial, a third main body material, a second sensitizer and a second dye; the first main body material can form an exciplex with the second main body material or the third main body material, and the second main body material can form an exciplex with the third main body material; the first sensitizer and the second sensitizer are both thermally activated delayed fluorescent materials; the firstdye and the second dye are both resonance type thermal activation delayed fluorescence materials. According to the light-emitting layer of the organic light-emitting device provided by the invention,the interface exciplex and the bulk phase exciplex are used as main body materials, and the TADF material is used as a sensitizer to sensitize the resonant TADF material, so that the efficiency roll-off is remarkably reduced, and the device efficiency and stability are remarkably improved.

The invention discloses a novel organic electroluminescence device. The device comprises a first electrode, a second electrode and one or more layers of organic layers between the first electrode andthe second electrode. Each organic layer at least comprises a light emitting layer and an electronic transmission layer. The device is characterized in that the thickness of each electronic transmission layer is 5-100nm; each electronic transmission layer comprises at least one kind of compound shown by the formula (I) shown in the description, wherein L is selected from a chemical bond, an arylidene or sub-polycyclic aromatic hydrocarbon group of C6-C12, and a sub-heteroaryl or sub-polycyclic heteroaryl aromatic hydrocarbon group of C3-C12; the Ar1, the Ar2 and the Ar3 are respectively selected from the substituted or non-substituted aryl or polycyclic aromatic hydrocarbon group of C6-C30, and the substituted or non-substituted heteroaryl group or polycyclic heteroaryl aromatic hydrocarbon group of C3-C30; the R1, the R2, the R3 and the R4 are selected from hydrogen, the alkylene of C1-C10, the halogen, the cyan, the nitryl, the substituted or non-substituted aryl or polycyclic aromatic hydrocarbon group of C6-C30, and the substituted or non-substituted heteroaryl group or polycyclic heteroaryl aromatic hydrocarbon group of C3-C30; and the R3 can be connected with the R4, so an annular structure can be formed. According to the invention, the device is advantaged by low working voltage and high light emitting efficiency.

The invention discloses a conjugated micromolecule material based on bithiophene dipyrrole and derivatives thereof, and a preparation method and application thereof. The molecular structure is disclosed as Formula I, wherein R1 and R2 independently represent C1-C50 alkyl group, C1-C50 alkoxy group, aralkyl group or heteroalkyl group; X1 and X2 independently represent carbon or nitrogen; and Ar1 and Ar2 independently represent an unsubstituted or substituted group: monocycloaryl group, bicycloaryl group, tricycloaryl group and above, monocyclo heteroaryl group, bicyclo heteroaryl group, tricyclo heteroaryl group and above, and 1-3 groups above connected by bonding (including single bond, double bond and triple bond) or condensing. The micromolecule material has excellent current carrier transmission performance and solubility, and can be used in organic field-effect transistors and organic solar cells in the field of photoelectricity. Formula I.

The invention discloses a carbazole derivative and a material and an organic light-emitting device comprising the same. The carbazole derivative adopts a structural formula as follows: FORMULA. The carbazole derivative provided by the invention is soluble in an organic solvent, and has relatively high glass transition temperature, high heat stability and good carrier transport capacity. The carbazole derivative has a simple synthesis technology and a simple purification method and has the characteristics of suitability for large-scale production and the like, and through connection with different groups, the molecular energy level can be adjusted and the light-emitting property, the heat stability and the like are regulated, so that the carbazole derivative is an ideal choice as an organiclight-emitting device material. The light-emitting device prepared from the carbazole derivative provided by the invention has high light-emitting efficiency, good stability and a longer service life, so that the light-emitting efficiency and the service life of the device can meet a requirement on practicality.

The invention provides a phosphorescent host material. The phosphorescent host material has a structural formula as described in the specification; in the structural formula, R is one selected from the group consisting of an H atom and C1-C10 alkyl groups or phenyl groups. The phosphorescent host material is pyridine-substituted difluorene prepared by bonding fluorene containing a carbazole group with pyridine, fluorene and pyridine have high heat stability, the carbazole group has a good hole transport property, and pyridine has a good electron transport property, so the phosphorescent host material has high heat stability and good carrier transport performance. Furthermore, the invention also provides a preparation method for the phosphorescent host material, and the preparation method has simple process. Moreover, the invention further provides an organic electroluminescent device using the phosphorescent host material, and the organic electroluminescent device has high performance.

A carbazole compound which can be used for a transport layer or as a host material or a light-emitting material of a light-emitting element is provided. Specifically, a carbazole compound which makes it possible to obtain a light-emitting element having good characteristics when used in a light-emitting element emitting blue phosphorescence is provided. In the carbazole compound, the 9-position of one carbazole, the 9-position of the other carbazole, and the 1-position of a benzimidazole skeleton are bonded to the 1-position, the 3-position, and the 5-position of benzene.

A composite material including an organic compound and an inorganic compound, which has a high carrier-transport property; a composite material having an excellent property of carrier injection to an organic compound; a composite material in which light absorption due to charge transfer interaction is unlikely to occur; and a composite material having a high visible-light-transmitting property are provided. A composite material which includes an organic compound and an inorganic compound exhibiting an electron-accepting property with respect to the organic compound, in which the rings of the organic compound are all benzene rings and the number of the benzene rings of the organic compound is greater than or equal to 4 and less than or equal to 25, is provided.

The invention discloses a production method of a titanium dioxide / black phosphorus quantum dot composite material. The production method of the titanium dioxide / black phosphorus quantum dot compositematerial comprises the steps of (1) dispersing titanium tetrabutoxide and glycerin in ethyl alcohol respectively, then mixing obtained solutions, stirring an obtained mixture evenly, transferring themixture into a reaction kettle for reaction to obtain white powder, and then annealing the obtained white solid powder in a muffle furnace to obtain titanium dioxide micrometer flower; and (2) mixingthe titanium dioxide micrometer flower obtained in the step (1) and black phosphorus, conducting full grinding, then adding a ground mixture into a saturated aqueous solution of nitrogen, under the action of an ice-water bath, placing mixed liquid in a reaction kettle for hydrothermal treatment, and conducting centrifugal drying to obtain the titanium dioxide / black phosphorus quantum dot compositematerial. The titanium dioxide / black phosphorus quantum dot composite material can completely degrade dye methyl orange in 150 minutes, has photocatalytic activity higher than those of other photocatalysts relative to black phosphorus quantum dots under the same condition, and has the advantages of environmental protection, low consumption, high efficiency and good industrial prospects.

The invention relates to a photocatalytic water splitting material, and particularly relates to a Z-configuration visible light catalytic decomposing water composite material and a preparation method thereof. The preparation method comprises the steps of dropwise adding a silver nitrate solution into flower-like molybdenum disulfide dispersion liquid under stirring, and stirring to obtain a mixed precursor solution; weighing and dissolving phosphate into deionized water to obtain a phosphate solution; under stirring, adding a sodium phosphate solution into the prepared mixed precursor solution, enabling the solution to gradually generate greyish-green sediments along with the adding of sodium phosphate, continuously stirring the mixed solution for 3h after dropwise adding, finally washing the reaction sediments with deionized water and ethyl alcohol respectively for three times and vacuum drying. The bent basal plane formed by flower-like molybdenum disulfide can become the main active site of a light-catalyzed reaction, and is stronger than a molybdenum disulfide nanosheet within the absorption range of visible light, and the performance of the composite photocatalyst can be further improved.

The invention belongs to the technical field of panel display, and specifically relates to a quantum dot film, a preparation method thereof, a QLED (Quantum dot Light-Emitting Diode) device and a preparation method thereof. The surface of a quantum dot in the quantum dot film is bound with a conjugated ligand with the following structural general formula: X1-R-X2, wherein both X1 and X2 are a functional group capable of being bound with the surface of the quantum dot, and R is an alkyl or alkyl derivative with a conjugated group. According to the quantum dot film provided by the invention, thequantum dot surface is connected with the specific conjugated ligand, and the conjugated ligand cross-links the quantum dots to enable the solubility, dispersion and conductivity of the quantum dotsto reach a better balance state, so that the stability and the carrier transmission ability of the quantum dot film are further improved, the light-emitting efficiency is correspondingly improved, andthe overall performance is improved.

To provide an organic semiconductor composition that can exhibit a high carrier transport property and give uniform characteristics. An organic semiconductor composition characterized by containing a high molecular weight compound having a carrier transport property and a low molecular weight compound, in which the low molecular weight compound has a structure represented by Formula (1) and a content ratio of the low molecular weight compound is from 5 to 95 parts by mass relative to a total of 100 parts by mass of the high molecular weight compound and the low molecular weight compound,[where, E represents a sulfur atom or a selenium atom, three E's may be the same or may be different from one another, and an aromatic ring in Formula may have substituents].

The invention discloses an organic thin-film transistor, comprising a baseplate, a gate electrode, an insulating layer, an organic semiconductor layer, a drain electrode and a source electrode. The organic thin-film transistor is in top-contact structure, or bottom-contact structure or top-gate type structure and is characterized in that the insulating layer is the combination of one or more materials which need UV curing. The invention aims at optimizing the fabrication process of the thin-film transistor, improving the property of the organic thin-film transistor and reducing the cost of the thin-film transistor by a large margin so as to largely reduce technique requirements and production cost in industrial production of the organic thin-film transistors and to improve rate of quality transistors.

The invention provides a compound of general formulae (I) and (II), wherein A1 and A2 are independently selected from C1-12 alkyl, C6-60 substituted or unsubstituted aryl and C10-60 substituted or unsubstituted condensed ring aryl, separately; the substituted aryl specifically means that the substituent is selected from C1-6 alkyl, halogen and CN or Si(R2)3, and R2 is selected from C1-6 alkyl; andthe substituted condensed ring aryl specifically means that the substituent is selected from C1-6 alkyl, halogen and CN or Si(R2)3, and R2 is selected from C1-6 alkyl. The compound of the general formulae can be used in organic electroluminescence devices.

The invention relates to a polycyclic organoboron derivative and an electronic device. According to the polycyclic organoboron derivative disclosed by the invention, a cyclic rigid structure is introduced, so that the obtained organoboron derivative is excellent in film-forming property and thermal stability, and can be used for preparing an organic light-emitting device, an organic field effect transistor and an organic solar cell. In addition, the polycyclic organoboron derivative can be used as a constituent material of a hole injection layer, a hole transport layer, a light emitting layer,an electron blocking layer, a hole blocking layer or an electron transport layer, and can reduce the driving voltage, improve the efficiency, improve the brightness, prolong the service life and thelike. In addition, the preparation method of the polycyclic organic boron derivative is simple, raw materials are easy to obtain, and the industrial development requirement can be met.

The invention provides a thermal excitation delayed fluorescence main material based on phosphonic aryl derivatives, a preparation method and an application thereof and relates to the thermal excitation delayed fluorescence main material, the preparation method and the application thereof. The invention aims to solve the technical problem of low device efficiency caused by the easiness in quenching of the molecules of the present planar thermal excitation delayed fluorescence dye. The structural formula of the thermal excitation delayed fluorescence main material provided by the invention is as shown in the specification. The preparation method comprises the following steps: adding an o-dibromo-benzene derivative, dichlorophenyl phosphine and n-butyllithium into tetrahydrofuran and reacting; extracting and drying, and then directly purifying or vulcanizing / and oxidizing and then re-purifying, thereby acquiring the product; or adding o-dibromo-benzene derivative, dichlorophenyl phosphine and n-butyllithium into tetrahydrofuran and reacting and then reacting with chlorodiphenylphosphine, re-oxidizing and purifying, thereby acquiring the product. The thermal excitation delayed fluorescence main material based on phosphonic aryl derivatives is applied to a thermal excitation delayed fluorescence electrofluorescence device.

The invention provides a D-A type conjugated polymer containing a condensed ring lactone, and a preparation method and an application thereof. The structural formula of the D-A type conjugated polymercontaining the condensed ring lactone is represented by formula I. The condensed ring lactone group is introduced to the conjugated main chain of a polymer, so the molecular conjugate plane of the polymer is widened, the intermolecular pi-pi stacking interaction is promoted, and the intermolecular steric hindrance of the polymer is reduced. The D-A type conjugated polymer containing the condensedring lactone has the advantages of good solubility, good photoelectric properties, excellent light absorption and carrier transport performances, and realization of a high short circuit current and ahigh energy conversion efficiency in organic solar batteries.

The invention discloses an optical activity layer of a polymer solar cell doped with an inorganic semiconductor nanocrystal and a preparation method thereof. The method comprises the following steps of: (1) dissolving inorganic salts of Pb, Cd or Zn into methacrylic acid or acrylic acid to obtain the inorganic salt solution of the Pb, Cd or Zn; (2) dissolving an optical active substance of a polymer solar cell into ortho-dichlorobenzene or chlorobenzene and stirring the mixture to obtain a solution of the optical active substance of the polymer solar cell; (3) mixing and stirring the inorganic salt solution obtained in the step (1) with the solution of the optical active substance of the polymer solar cell obtained in the step (2) to obtain a mixed solution; and (4) spinning the mixed solution obtained in the step (3) to form a film, placing the film in the H2S or H2Se atmosphere, treating for 10-120 minutes and taking out the treated film. The method is free from using complicated physical or chemical process steps for preparing nanocrystals, has the characteristics of simple process, low cost, controllable size and content of nanocrystals and the like and is applied to the large-scale industrial production.

The invention discloses arylamine tetradentate cyclometalated platinum complex near-infrared electroluminescent materials as well as preparation and application thereof. The cyclometalated platinum complexes contain ligands comprising dual donor units (triphenylamine fluorene or carbazole) and dual C^N tetradentate coordination structures; the donor units in cyclometalated complex molecules can further enlarge a conjugated system of the complexes, red shift of the emission spectra of the complexes is realized, and the complexes have a near-infrared emission characteristic. Efficient near-infrared emission can be realized when the cyclometalated platinum complexes are applied to preparation of polymer electroluminescent devices.