161 results about "Polyfluorene" patented technology

The embodiment of the invention provides a compound luminous layer and a manufacturing method thereof, and a white light organic electroluminescence device, relates to the technical field of electroluminescence, and can be used for meeting the requirement of multiple color domains and increasing the brightness of the device simultaneously. The compound luminous layer comprises a first luminous layer and a second luminous layer, wherein the first luminous layer comprises polyfluorene or a polyfluorene derivative; the second luminous layer comprises quantum dots. The compound luminous layer is applied to organic electroluminescence devices.

The present invention discloses methods to remove impurities in polymeric materials in order to improve the opto-electronic characteristics of devices fabricated from these polymers. The polymers include but not limited to polyarylenes, polyarylenevinylenes, polyaryleneethylnylene, polyfluorenes, polyanilines, polythiophenes, polypyrroles, and any conjugated co-polymers. The methods involve the selection of a scavenger or chelating agent and use it to remove metallic impurities from the polymers. The methods involve dissolving the polymer in a suitable solvent, adding a scavenger, mixing to form a scavenger, containing phase, and finally separating the scavenger containing phase from the polymer phase. According to this invention, it is preferable for the selected scavengers to have functional groups which can chemically react with metallic species and form a coordination compound that is not soluble in a selected solvent. The selected scavenger can be used in a free stand form or carried by either organic or inorganic media.

A compound for use in an electroluminescent device, including 0.001% to 10% by weight of nanostructure and a polyfluorene polymer. The compound can be used as a light emitting layer of an EL device including a cathode, an anode, and the light emitting layer disposed between the cathode and the anode. The EL device can be manufactured by providing a substrate, providing an anode or cathode on the substrate, and depositing the emitting layer on the substrate. The compound can be manufactured by ultrasonically cutting nanostructures and mixing the nanostructures with a polymer, such as the polyfluorene polymer.

The invention discloses a luminescent device, a manufacturing method of the luminescent device and a display panel. By means of the manufacturing method of the luminescent device and the display panel, the manufacturing process of the luminescent device is simplified, and the performance of the luminescent device is improved. The luminescent device comprises a white light emitting layer, the white light emitting layer comprises polyfluorene blue light emitting materials, red light quantum dots and green light quantum dots, and the red light quantum dots and the green light quantum dots are mixed in the polyfluorene blue light emitting materials. The white light emitting layer is of a single film layer structure, the film can be formed once, respective preparation of a red luminescent layer, a green luminescent layer and a blue luminescent layer is not needed, and therefore the process of the luminescent device is simplified and the structure of the luminescent device is simple. Besides, the polyfluorene blue light emitting materials have high heat stability and chemical stability and have a high fluorescent quantum yield, so that the luminescent device is high in luminous efficiency.

The invention provides a dual-electron and dual-hole transport layers-based organic solar cell and a preparation method thereof, and belongs to the technical field of organic solar cells. The organic solar cell sequentially comprises an ITO conductive glass substrate, a PFN/polyfluorene material PFBT dual-electron transport layer, a PCDTBT:PCBM active layer, an MoO3/graphene oxide dual-hole transport layer and a graphite anode from bottom to top. According to the method, an amphiphilic polyfluorene material PFBT with high conductivity and PFN are combined as the dual-electron transport layer; traditional inorganic transport layers of TiO2, ZnO and the like are replaced; interface contact with ITO is improved; interface composition is reduced; and the organic solar performance is improved. Meanwhile, MoO3 and graphene oxide are combined as the hole transport layer; a layer of graphite electrode is sprayed on the surface of the graphene oxide by an inkjet printing technology; the method is simple in use and suitable for large-area popularization; meanwhile, traditional materials of Au, Ag, Al and the like are replaced with graphite; and a metal-semiconductor contact does not exist, so that the interface is free of a schottky barrier; the energy loss in a device is reduced; and the performance of the device is improved.

The embodiment of the invention provides a composite film and a production method thereof as well as a photoelectric element and a photoelectric device, and relates to the field of manufacturing. The composite film has the advantage that the phenomena such as the agglomeration and the fluorescence quenching can be avoided. The composite film production method comprises the following steps: preparing a polyfluorene compound solution which comprises polyfluorene or polyfluorene derivatives; preparing a quantum dot solution; mixing the polyfluorene compound solution and the quantum dot solution together so as to prepare a mixed solution; removing a solvent in the mixed solution, and preparing the composite film.

A polymer formed from optionally substituted first repeat units of formula (I) wherein Ar is selected from (a) aromatic hydrocarbon substituted with at least one electron withdrawing group or electron withdrawing heteroaryl. The polymers have application in electroluminescent devices.

The present invention belongs to the field of optoelectronic material technology, and is especially polysilico fluorene with the carbon atom in the ninth position in polyfluorene substituted with silicon atom and its preparation process. Industrial materials are made to pass through four high yield reaction steps to synthesize serical silico fluorene products, and the serical silico fluorene products are then are polymerized through Suzuki, Heck, Sonogashira, Yamamoto and other processes to obtain silico fluorene homopolymers and copolymers. These polymers have excellent light emitting performance and are efficient and stable light emitting polymer materials with latent excellent application foreground in the fields of electroluminescence, photovoltaic cell, non-linear optics and sensor.

The invention pertains to the technical field of organic and organometalic electro-active material, which more particularly relates to a hyperbranched polyfluorenes material comprising steric blockade and a preparation method thereof. The material introduces high blockade on the basis of hyperbranched polyfluorenes structure to distort considerately the synthesis molecular chain, thus efficiently inhibiting molecular aggregation, avoiding formation of excimer and fluorescence quenching, improving the material with luminous efficiency. As organic electro-active material with high inoxidability, thermal shock resistance and photostability, the material can be widely used in organic electronics industry such as organic/synthesis electroluminescent, photovoltaic cell, organic field-effect transistor and laser etc.

Novel aromatic ether-containing monomers are described along with processes for their preparation and their polymerization into corresponding aromatic ether-containing polyfluorenes. These polyfluorenes exhibited stable blue-emission and therefore have application in polymer light-emitting devices.

The invention discloses polymer nanoparticles capable of detecting hypochlorous acid and copper ions. The polymer nanoparticles are novel polymer nanoparticles prepared by taking a polyethylene glycol monomethyl ether chain transfer agent, styrene, 2-aminoethylmethacrylate hydrochloride, rhodamine B isothiocyanate and a 9,9-dioctyl polyfluorene-benzothiadiazole alternate copolymer as raw materials. The polymer nanoparticles can realize high-sensitivity ratio fluorescence detection on the hypochlorous acid and the copper ions in a pure water solution. Compared with an existing fluorescence detection technology, the prepared polymer nanoparticles have a double-ratio detection function and good biocompatibility; a synthetic route is simple and a detection method is simple and convenient; the polymer nanoparticles are applicable to amplified synthesis and actual production application, and have a great application prospect in the technical fields including analytical chemistry, life science, environmental science and the like.

The invention relates to a preparation method for carboxylic acid type polyfluorene/titanium dioxide nano-hybrid materials. The preparation method comprises the steps that a dibromo fluorene monomer which contains carboxyl is compounded, carboxylic acid type polyfluorene is compounded, and a sol-gel method is adopted to prepare the carboxylic acid type polyfluorene/TiO2 nano-hybrid materials. The preparation method has the advantages that the anionic type polyfluorene is compounded, the sol-gel method is adopted to prepare the carboxylic acid type polyfluorene/titanium dioxide nano-hybrid materials, the method is simple, the reaction condition is gentle, two-phase mixing is conducted to approach the molecular level, and the hybrid materials are facilitated to form a homogeneous system; according to the prepared carboxylic acid type polyfluorene/titanium dioxide nano-hybrid materials, an obvious fluorescence quenching phenomenon can be observed, separating and transmitting process of electric charges are generated on the interfaces of the polyfluorene and titanium dioxide particles, the film-forming property is good, and therefore the hybrid materials have potential application in the field of photoelectricity.

The invention relates to a preparation method of a polyfluorene blue high-molecular luminescent material modified by zinc oxide quantum dots. The method comprises the synthesis of 1,4-di-n-butoxybenzene, the synthesis of 1,4-dibutoxy-2, 5-bis(bromomethyl)benzene, the synthesis of 1,4-dibutoxy phenyl-2,5-tri phenylphosphine bromine, the synthesis of 1,4- dibutoxy-2,5-divinyl benzene, the synthesisof 2,7-dibromofluorene, the synthesis of 2,7-dibromo-9,9-dioctyl benzene and the synthesis of a polymer-based nanocomposite. Compared with the prior art, the present invention has the following advantages that the preparation technology is simple and the cost is low; the heat stability of the polymer is excellent; the unique quantum confinement effect and the fluorescent characteristic of the added ZnO quantum dots enable the polymer fluorescent emission spectrum to make an obvious blue shift, and the fluorescent strength is obviously enhanced; in addition, ZnO is a good electron transport material, ZnO introduced into a luminescent layer polymer is capable of effectively balancing the ratio of electron and hole for forming exciton and increasing the luminescent efficiency of the devices.

The invention discloses a novel synthesis method of a polyfluorene derivative and an application in a flow injection fluorescent sensor for a tumor marker. The synthesis method of the polyfluorene derivative comprises the following steps that: 1,4-dibromo p-phenylenediamine (a compound 1) is synthesized; 2,7-dibromo-9,9-bi(3'-(N,N'-dimethylamino) propyl)-fluorene (a compound 2) is synthesized; p-vinyltoluene (a compound 3) is synthesized; the three monomers are polymerized into the polyfluorene derivative by a Heck reaction. A fabrication method of the sensor comprises the following steps that polymethyl methacrylate is adopted to fabricate a flow injection fluorescent flow cell; ferroferric oxide magnetic particles and gold nanoparticles are prepared and assembled into gold covered ferroferric oxide; a primary antibody is modified on gold cladded ferroferric oxide; the polyfluorene derivative is subjected to silicon cladding treatment; a secondary antibody is modified on the surface of the silicon cladded polyfluorene derivative; an immune reaction is conducted; and flow injection fluoroscopic detection is conducted on the tumor marker. The sensor is strong in specificity, high in sensitivity, simple to operate, and low in detecting line.

An alcohol-soluble high-molecular polyfluorene material containing phosphate radicals used for electroluminescent device, flat display and fluorescent sensor is prepared through linking the high-polar phosphate radical with the side chain of polyfluorene, and Yamamoto or Suzuki reaction for grafting the fluorescent dye (dibenzothiadiazole or dithiophene dibenzothiadiazole) to polyfluorene.

The present invention relates to blue electroluminescent polymer material and its preparation process. Based on the thought that deep blue polymer molecule can transfer energy effectively to blue light or blue-green light fluorescent dye molecule, the present invention adopts polyfluorene as deep blue mother body and naphthyl imide with high blue light or blue-green light fluorescence quantum efficiency as doped object unit, and grafts the doped unit onto the mother body to disperse the doped unit inside the mother body in molecule level. By means of regulating the content of the blue light or blue-green light fluorescent dye, the present invention realizes the energy transfer from the blue polymer molecule to the blue light or blue-green light fluorescent dye partially or completely and the pure blue electroluminescence, and constitutes one kind of molecularly dispersed blue polymer electroluminescence material.

The invention discloses a synthetic method of a brush type homopolymer and a brush type copolymer containing conjugate oligomeric branched chains. In the synthesis process of a novel monomer, a metal catalysis coupling reaction and an esterification reaction are adopted, so that conjugate alkene monomers such as oligo-containing polyfluorene, oligomeric benzene, oligomeric benzyne, oligomeric carbazole, oligomeric thiophene and the like are synthesized; and a way for grafting and grafting to is adopted, and radical polymerization (including atom transfer radical polymerization) are performed, so that a series of brush type homopolymers and copolymers with conjugate branched chains are obtained, homopolymerization, binary irregular copolymerization and block copolymerization, and ternary irregular copolymerization and block copolymerization of a monomer containing a conjugate branched chain are realized, and special brush type homopolymers and brush type copolymers are obtained. The synthetic method disclosed by the invention is simple, convenient and practicable; a synthesized brush type polymer has a controllable structure; and a three-dimensional structural design of a large molecular strain is realized, and combination of a conjugate structure and a brush type structure is realized, so that a polymer with excellent comprehensive performance is obtained.

The invention provides a polyfluorene derivative and an organic light-emitting device thereof, and belongs to the technical field of organic photoelectric materials. The derivative has a structure shown as a formula (I). The polyfluorene derivative disclosed by the invention has a larger conjugate plane structure, so that high electron fluidity can be provided; electron-deficient group dibenzofuran, dibenzothiophene, acridine, phenoxazine and phenothiazine structures are introduced to better facilitate the acception of electrons and enable the polyfluorene derivative to have good transmissionperformance; by introducing a bridged structure, on the one hand, the molecular weight of the compound can be enlarged, and the obtained material is enabled to have high glass transition temperature and prevent the crystallization effect; on the other hand, the derivatives are enabled to have certain distortion in three-dimensional stereoscopic structure, and the film-forming property of the derivative is improved. The organic light-emitting device, which is prepared by using the compound as a main body material in a luminescent layer, shows the advantages of low driving voltage and high luminous efficiency; the polyfluorene derivative is an organic luminescent material with excellent performance.

The invention belongs to the technical field of polymer solar cells, and particularly relates to an organic solar cell based on the polyfluorene cathode interface self-assembly anode plasma resonance effect and a preparation method of the organic solar cell. According to the method, an amphipathic polyfluorene material with high conductivity serves a cathode transmission layer, interface contact with ITO is increased through self-assembly of the cathode transmission layer, the cathode transmission layer replaces a traditional TiO2 or ZnO inorganic transmission layer, interface combination is reduced, and the performance of the organic solar cell is improved; meanwhile, a vacuum evaporation method is adopted for directly arranging a layer of gold nanoparticles on an active layer in an evaporation mode, light scattering is increased by utilizing the surface plasma effect of the layer of gold nanoparticles, the light path is increased, then the light utilization rate is increased, and thus the performance of a device is improved. The efficiency of the organic solar cell is effectively improved through the method, and the method is of great reference significance for nanoimprint lithography and development of organic solar cells in the future.

The invention belongs to the technical field of solar cells, and particularly relates to an electron transport layer for improving the stability of a reverse perovskite solar cell and a preparation method of the electron transport layer. The preparation method comprises the following steps: synthesizing fluorine-containing polyfluorene by adopting Suzuki coupling reaction, dissolving the preparedfluorine-containing polyfluorene, fullerene and derivatives thereof in chlorobenzene to obtain a fluorine-containing polyfluorene, fullerene and derivative solution thereof, and then carrying out thespin-coating of the fluorine-containing polyfluorene, fullerene and derivative solution thereof on a perovskite layer of a solar cell device to obtain an electron transport layer. Compared with a common electron transport layer material, the electron transport layer provided by the invention can obviously improve the stability of the reverse perovskite solar cell.

A memory element includes a first electrode, a passive layer on and in contact with the first electrode, a polyfluorene active layer on and in contact with the active layer, and a second electrode on and in contact with the polyfluorene active layer. The chemical structure of the polyfluorene active layer may be altered to take different forms, each providing a different memory element operating characteristic.

The invention relates to a di-polyfluorene graft polystyrene which is prepared in the following steps of: 1, synthesizing 2-iodo-fluorenone; 2, synthesizing di-polyfluorene; and 3, synthesizing the di-polyfluorene graft polystyrene. The invention has the following performance that the reaction temperature is low, the reaction can be implemented at room temperature so as to achieve the advantages of less byproducts and easiness for purification; a synthesizing progress is simple and the total yield is higher up to 20% to 30%; and the content of di-polyfluorene fluorescence components in the di-polyfluorene graft polystyrene can be adjusted.

The invention discloses a polyfluorene polymer with a main chain containing non-conjugated units and a preparation method and application of the polyfluorene polymer. The polymer is characterized in that the non-conjugated structural units are introduced into the main chain of polyfluorene so as to achieve induction to generate a beta-phase. As everyone knows, the polyfluorene polymer is one of the most promising blue-light-emitting polymers and is considerably researched due to the fact that the polyfluorene polymer is high in fluorescence quantum efficiency, relatively good in thermal stability and electrochemistry stability, easy to functionalize at carbon-9 site of fluorene, and the like, and the beta-phase has far-reaching influence on thin film morphology, carrier transporting and device performance.

The invention discloses a preparation method of a cross-linked polyfluorene piperidine anion exchange membrane. The method comprises the following steps: dissolving 9,9-dimethyl fluorene, N-methyl piperidone and trifluoroacetone in dichloromethane to obtain a homogeneous solution, adding trifluoroacetic acid and trifluoromethanesulfonic acid as catalysts, performing reacting for 24-36 hours at 0-10 DEG C in a nitrogen atmosphere, performing precipitating with a K2CO3 aqueous solution, and performing washing with deionized water to obtain light yellow solid polyfluorene piperidine polymer powder; dissolving the obtained polyfluorene piperidine and iodomethane in chloroform, performing heating and refluxing for 24-36 hours under a dark condition and a nitrogen atmosphere, then pouring a reaction solution into diethyl ether to precipitate, and performing washing with deionized water to obtain a quaternized polyfluorene piperidine polymer; and dissolving the obtained solution in dimethyl sulfoxide, adding a brominated amino siloxane cross-linking agent solution, performing reacting for 12-24 hours at 50-60 DEG C, adding iodomethane, performing reacting for 24-48 hours at 30-40 DEG C in a dark nitrogen atmosphere, adding ethanol, performing standing for 24-36 hours at room temperature, performing standing for 12-24 hours at 80 DEG C, standing for 3-6 hours at 100 DEG C, and performing standing for 1-3 hours at 120 DEG C to obtain the cross-linking type polyfluorene piperidine anion exchange membrane.