470results about How to "High fluorescence quantum efficiency" patented technology

The invention discloses a 1,3,5-triazine derivative. The derivative is a compound with a structure of a formula I. The compound of the formula I can emit high-efficiency blue fluorescence and meanwhile has higher triplet state energy; so that the compound of the formula 1 can sensitize green and red phosphorescent doped materials while emitting the high-efficiency blue fluorescence, so that the technological conditions for preparing WOLEDs (White Organic Light Emitting Diode) are met. Meanwhile, the invention also discloses a preparation method of the compound of the formula 1 and application in preparation of the white light organic electroluminescent diode.

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 preparation method and application in the luminescent element thereof of CuInS2-ZnS / ZnSe / ZnS semiconductor quantum dots with a core-shell structure, belonging to the technical field of the preparation method of the semiconductor quantum dot. The method comprises the following steps: dissolving the precursors of copper source, zinc source, indium source and sulfur source in nonpolar mixed solvent to perform nucleation and growth under a certain temperature and obtain a CuInS2-ZnS alloy core-ZCIS, then adding zinc source and selenium source alternately in the solution to perform epitaxial growth of ZnSe on the core, then perform epitaxial growth of ZnS to prepare the CuInS2-ZnS / ZnSe / ZnS quantum dots, finally adding polar solvent in the solution, settling, centrifuging, cleaning, and perform vacuum drying to obtain solid quantum dot powder. The prepared quantum dots are 2-8nm and have uniform particle size, controllable emission wavelength and high yield. The quantum dots are used as luminescent material to prepare red, yellow and green quantum dot luminescent elements and the luminescent elements have excellent luminescent property.

The invention discloses application of a multifunctional carbon quantum dot taken as a fluorescent whitening agent in the fields of spinning printing and dyeing, washing agents, papermaking, plastics, leathers or coatings and the like. The carbon quantum dot disclosed by the invention has the advantages of wide application field, good whitening effect and good light resistance, is innoxious and environmentally friendly, can be applied to the fields of spinning printing and dyeing, washing agents, papermaking, plastics, leathers or coatings and the like, and can generate unforeseeable technical effect because the carbon quantum dot can generate active oxygen free radicals under the condition of illumination, wherein the unforeseeable technical effect is as follows: the bacteria attached to the surfaces of spinning printing and dyeing materials, the washing agents, paper sheets, the plastics, the leathers or the coatings and the like can be effectively killed after the spinning printing and dyeing materials, the washing agents, paper sheets, the plastics, the leathers or the coatings and the like which are doped with the carbon quantum dot absorb ultraviolet light.

The invention discloses a core-shell quantum dot structure and a preparation method thereof. The method comprises the following steps: firstly, preparing a core material CdS having a relatively wide band gap width, then coating with a layer of material CdSe having relatively narrow band gap width to be used as a first-layer shell layer, and again coating with wide-band-gap materials CdZnSeS and ZnS as a second-layer shell layer and a third-layer shell layer based on the first-layer shell layer. The new material has the advantages of high fluorescent quantum efficiency and continuous adjustable luminescent spectra relative to a traditional core-shell structural material, has quite good prospects on use no matter as photoluminescence or electroluminescence materials or application in biological fields. The invention also provides a simple method for synthesis of a core-layer material, the process is simple and easy to operate, and the repeatability is good.

The invention discloses a benzothiazole-cyanophenyl compound serving as a hydrazine fluorescence probe. The benzothiazole-cyanophenyl compound has a structural formula as shown in (I); the compound is prepared by performing cyclodehydration with bromobenzaldehyde and 2-amino-4-chloro thiophenol serving as the raw materials, then performing coupled reaction in order to connect with a bromobenzaldehyde derivate, and finally performing Knoevenagel reaction with malononitrile. The benzothiazole-cyanophenyl compound has the advantages that the raw materials are low in price and easy to gain, the synthetic route is simple, and the yield is relatively high; rigid structures such as benzothiazole and phenylacetylene groups are introduced into such a fluorescence probe, thus high fluorescence quantum efficiency is realized, and relatively high thermal stability and dissolubility are brought. The probe adopts the photoinduced charge transfer mechanism and the conjugate passivation mechanism, therefore, a response range respect to hydrazine can be expanded; the probe has the characteristics of being fast in response, high in sensitivity and high in selectivity, is suitable for being applied to safety detection of foods as well as safety detection of a laboratory, in particular applied to industrial wastewater monitor; and the probe has a wide application prospect in environment monitoring, ecological protection, disease diagnosis, industrial production and pollution discharge inspection.

The invention discloses a compound with anthrone as a core and a use thereof. According to the compound, anthrone is a mother nucleus and is connected to an aromatic heterocyclic group so that molecular symmetry is destroyed, molecule crystallinity is destroyed, intermolecular aggregation is avoided and good film-forming performances are obtained. The compound as a light-emitting layer material is used for an organic light-emitting diode. An OLED device prepared from the compound has good photoelectric properties and can satisfy the requirements of the panel manufacturing companies.

The invention discloses a five-membered ring substituted compound with xanthone as a core and a use thereof. According to the compound, xanthone is a mother nucleus and is connected to an aromatic heterocyclic group so that molecular symmetry is destroyed, molecule crystallinity is destroyed, intermolecular aggregation is avoided and good film-forming performances are obtained. The compound as a light-emitting layer material is used for an organic light-emitting diode. An OLED device prepared from the compound has good photoelectric properties and can satisfy the requirements of the panel manufacturing companies.

The present invention relates to one kind of electroluminescent phosphorescence material and the organic electroluminescent device with the material. The electroluminescent phosphorescence material has the general expression of LnMX(3-n), where, M is selected from Os, Pd, Pt, Rh and Ir; X is selected from phenylpyridine, acetylacetone and picolinic acid; n is 1, 2 or 3; and L has the structure as shown. The present invention is superior to available red light emitting material, and the electroluminescent phosphorescence material and the organic electroluminescent device with the material have excellent performances, including high light purity, high brightness and high light emitting efficiency.

The invention discloses a fluorescent probe: a benzothiazole-terpyridine compound used for distinguishing and detecting zinc ions and cadmium ions. The probe has a structural formula as shown in (I). The compound is prepared by using bromobenzaldehyde and O-aminothiophenol as raw materials, and performing a dehydration cyclization reaction, a coupling reaction and a terpyridine derivative reaction. According to the invention, the raw materials are cheap and easily available, a synthesis route is simple, a yield is relatively high, and the fluorescent probe is high in fluorescence quantum efficiency, and relatively high in heat stability and dissolvability. The probe uses a photoinduced charge transfer mechanism, has different luminescence response for the zinc ions and the cadmium ions, has characteristics of rapid response, high sensitivity and high selectivity, is suitable for food safety inspection, laboratory safety inspection, and especially industrial wastewater monitoring, and has a wide application prospect in environment monitoring, ecological protection, disease diagnosis, industrial production and sewage inspection.

The invention discloses a benzothiazole-aniline compound used as a pH fluorescent probe and a preparation method thereof. The structural formula is shown as a chemical formula (shown in the description) (I), wherein in the formula, R1 is vinyl, acetenyl, styryl, phenylethynyl, biphenyl or perylene base; and R2 and R3 are both hydrogen, methyl or ethyl alkane. The preparation method comprises the following steps of: taking p-bromobenzaldehyde and 2-aminothiophenol as raw materials, and connecting with iodine-containing nitrobenzene derivative through dehydration cyclization reaction and coupling reaction; and generating the pH fluorescent probe benzothiazole-aniline derivative through reductive amination. Rigid structures, such as benzothiazole and phenylethynyl, are introduced into the fluorescent probe; the fluorescent probe is high in fluorescence quantum efficiency, and high in thermal stability and solubility. The probe can detect pH value under strong acid condition by adopting a photoinduced charge transfer mechanism and a conjugate passivation mechanism; and the probe has the characteristics of rapid response, high sensitivity and high selectivity, and has wide application prospect in environment monitoring, ecological protection, disease diagnosis, industrial production and sewage inspection.

The present invention belongs to the field of nanometer material and biological analysis and detection technology, and is especially preparation process of water soluble CdTe / CdS / ZnS quantum dot in core-shell-shell structure. The preparation process includes mixing zinc salt or zinc oxide with water soluble sulfhydryl compound in water phase, injecting prepared solution of CdTe / CdS in core-shell structure to obtain CdTe / CdS / ZnS precursor solution, setting the precursor solution in a glass tube and performing microwave radiation reaction in a microwave reactor to obtain CdTe / CdS / ZnS quantum dot in core-shell-shell structure. The process is completed in water phase, and is safe and simple. The CdTe / CdS / ZnS quantum dot in core-shell-shell structure has high fluorescence quantum efficiency, high water solubility, excellent stability and high biocompatibility, and may be applied widely in fluorescent marker for biological analysis and detection.

The invention relates to a new compound and an organic electroluminescent device containing the compound. The structural formula of the compound is shown as below, Ar1 and Ar2 are respectively and independently selected from substituted or unsubstituted aromatic group, aromatic ethylene group, polycyclic aromatic group, polycyclic aromatic ethylene group, aromatic amine group and a polycyclic compound containing nitrogen atoms or a heterocyclic compound containing nitrogen atoms. The invention resolves the problems existing in the colorimetric purity, luminescent efficiency, etc. of the currently used luminescent materials. The material of the invention can be used as a luminescent material, and the electroluminescent device prepared of the material of the invention has the predominant performances of high colorimetric purity, high brightness and high efficiency.

The invention discloses a preparation method of an ethylene-vinyl acetate adhesive film containing quantum dots, which comprises the following steps: using a modifier to perform hydrophilic or lipophilic modification on the surfaces of the semiconductor quantum dots, further uniformly dispersing the semiconductor quantum dots after modification into a solvent for forming semiconductor quantum dotink, then mixing the semiconductor quantum dot ink, an ethylene-vinyl acetate copolymer and an assistant, and performing hot compression molding or extrusion molding for getting the ethylene-vinyl acetate adhesive film containing the semiconductor quantum dots. The preparation method is simple, good in controllability, strong in operability and easy for industrial production. The invention further discloses the ethylene-vinyl acetate adhesive film containing the quantum dots, which is applied in solar cells and can effectively improve the utilization efficiency of the solar cells.

The invention discloses a compound taking triazine as a core and an application of the compound on an organic electroluminescent device. The compound takes triazine as the core, which has the characteristics of difficult crystallization among molecules, difficult aggregation and good film forming ability. When the compound is taken as a luminescent layer main material of the organic electroluminescent device for usage, current efficiency, power efficiency and external quantum efficiency of the device are greatly improved; at the same time, the device life can be obviously increased.

The invention discloses a polysubstituted quinoline-coordinated iridium-hybridized compound, a preparation method thereof and application of the compound in electroluminescent materials. A modified ligand of the compound comprises 3,5-bis-substituted(R<d> R<d>) in 2-subsittued phenyl, 4-substituted(R<e>) and 3,4,5-tri-substituted(R<d> R<e> R<d>)phenyl. The specific synthesis route of the polysubstituted quinoline-coordinated iridium-hybridized compound comprises the steps of generating substituted quinoline by virtue of amine ester exchange reaction, acid-catalysis Skraup cyclocondensation and hydroxyl halogenating reaction, and preparing ligand by virtue of Suzuki coupling reaction. According to the route, the side reactions of alkyl suzuki coupling reaction and competition of multiple reaction sites are avoided, so that the synthesis efficiency can be improved, and the purifying difficulty can be reduced. According to molecular spectral features and compound modification functions, the iridium-hybridized compound can be clearly used as an electroluminescent material for use in organic photoelectric appliances.

The invention relates to a novel red BODIPY fluorescent dye with the chemical formula of C10+mH7+nBF2N2+xOy, wherein m, n, x and y are integers from 0 to 100. The preparation method comprises the following steps: dissolving pyrrole with substituent groups R1, R2 and R3 in an organic solution; adding ethyl glyoxylate together with nitrogen to the organic solution for a chemical reaction by using trifluoroacetic acid or toluenesulfonic acid as a catalyst; adding 2,3-dichloro-5,6-dicyano-1,4-benzoquinone oxidative dehydrogenation; and adding organic amine and a boron trifluoride diethyl ether solution for another reaction. After the reaction solution is concentrated, chromatography is performed with a silicagel column to obtain the fluorescent dye. The fluorescent dye can be used for cell imaging, fluorescent probe or laser dye. The fluorescent dye has the advantages that the ultraviolet-visible absorption spectrum and the fluorescence emission spectrum of the fluorescent dye are narrow; fluorescent quanta has high efficiency and good light stability; and the fluorescent dye has simple molecular structure and can be synthesized easily, so as to facilitate popularization and application.

The invention discloses bi(trimethylphenyl) boron derivatives. The derivatives are compounds with a structure show in a formula I; the formula I is as shown in the specification; the compounds shown in the formula I can emit efficient blue fluorescence, and also have high triplet level; green and red phosphor doped materials also can be sensitized when the efficient blue fluorescence is emitted; therefore, the technological conditions of preparation of white organic light-emitting diodes (WOLEDs) are met. Meanwhile, the invention also discloses a preparation method of the compounds shown in the formula I and application thereof in preparation of the white organic light-emitting diodes.

The invention discloses a terpyridyl derivative. The derivative has a structure shown as a formula I which is as shown in the specification. The terpyridyl derivative having a structure shown as the formula I is taken as an organic electroluminescent material which efficiently emits blue fluorescent light and is high in color purity, fluorescent quantum yield, electroluminescence efficiency, film-forming property and thermal stability, easy to modify, and various in structural forms. A light-emitting material made of the material can be taken as a main body material of sensitized phosphorescent molecules. A white light device made of the material is simpler in structure, simpler in manufacturing process, and lower in cost.

The invention discloses a phosphine-containing benzophenone organic light-emitting material, a synthesis method and applications thereof, wherein the molecular general formula is Ar-Ar'-R, Ar is a phosphine-containing functional group, Ar' is benzophenone, and R is alkane, halogen, aromatic ring or aromatic heterocyclic substituent, and the like. According to the present invention, the synthesis method has advantages of simple process and easy purification, and the synthesized light-emitting material has good electron transmission performance and high fluorescence quantum efficiency, is suitable for preparing the light-emitting layer or electron transmission layer in organic electroluminescent devices, and can further be adopted as the light-emitting material and the electron transmission material in OLEDs, wherein the two layers in the classic OLEDs structure are integrated into one layer so as to simplify the OLEDs device structure and the preparation process; and the light-emitting material of the present invention specifically responds to oxygen, metal ions and the like, and is suitable for use in chemical detection, biological detection, biological imaging, anti-counterfeiting, and other fields.

The invention belongs to the technical field of organic electroluminescent display, and particularly relates to coumarin derivates, a preparation method thereof and application thereof in a white-light organic electroluminescent device. The coumarin derivates are in any one structure as disclosed in the specification. The coumarin derivate materials provided by the invention can efficiently emit blue fluorescence, and have high color purity, high fluorescence quantum yield, high electroluminescence efficiency and favorable film-forming performance; and the synthesis and purification method ofthe coumarin derivate materials is simple and suitable for mass production. The coumarin derivate materials provided by the invention have a high triplet-state energy level (higher than 2.4eV), and can simultaneously sensitize green and red phosphorescent doped materials. The coumarin derivate materials provided by the invention can be used as main materials in illuminant materials and / or luminescent layers in the organic electroluminescent device and used for preparing the organic electroluminescent device.

The invention discloses a perovskite quantum dot film and a preparation method thereof, and a device. The preparation method of the perovskite quantum dot film comprises the following steps of: dissolving AX, BX2 and a short-chain organic ligand in a solvent to obtain a perovskite ABX3 precursor solution, wherein A is a metal cation or an alkylammonium ion, B is a divalent metal cation, and X is ahalogen anion; in the spin-coating process, combining an anti-solvent method for in-situ growth of a perovskite quantum dot film, and performing heating annealing. The perovskite quantum dot film anda preparation method thereof, and the device have the advantages that the perovskite quantum dots grow in situ in the spin-coating preparation process of the thin film, the thin film is good in film-forming property, high in fluorescence quantum efficiency, simple in preparation process and adjustable in light-emitting wavelength, and short-chain organic ligands can be adopted, so that the conductivity of the quantum dot thin film is improved, and the preparation method is beneficial to preparation of a more efficient and stable perovskite light-emitting diode.

The invention discloses a compound containing ketone and heterocyclic nitrogen and application thereof to an organic light-emitting device. The compound has the advantages of being not subjected to crystallization and aggregation easily and having good film-forming property, and rigid groups in molecules can improve heat stability of a material. The compound serving as a light-emitting layer material is applied to an organic light-emitting diode (OLED), and a manufactured OLED device has good photoelectric property and can meet the requirements of panel manufacturing enterprises.

The invention relates to a blue-fluorescence material and an application thereof. The blue-fluorescence material and the application thereof start from the perspective of molecular design, tetraphenyl ethylene is taken as the core, and an electron-donating structure and an electron-withdrawing structure which are provided with anthryl groups are introduced to the two sides of a molecule. The tetraphenyl ethylene has the property of aggregation-induced emission, and the fluorescence quenching phenomenon produced by molecular aggregation can be effectively avoided; anthracene is a stable and efficient blue-fluorescence group, and the two anthracene structures are introduced, so that the number of chromophoric groups is increased, the relative molecular mass of the molecule is increased, the glass-transition temperature of the molecular is increased, and the heat stability of the molecule is enhanced. The D (electron-donating) group and the A (electron-withdrawing) group are introduced, transfer of electric charges inside the molecule can be effectively facilitated, and the luminescence property of the molecule is improved. Experiment results show that the blue-fluorescence material has good heat stability and electroluminescene properties, and when the blue-fluorescence material is used as luminescent layers of blue organic electroluminescence devices, blue-light with better color purity and emitting efficiency can be obtained.

The invention relates to a boron-containing organic compound and application of the boron-containing organic compound to an OLED device. The structure of the compound is shown as a general formula (1), the whole molecule of the compound is a large rigid structure, and the introduction of substituent groups reduces the planarity of a material, so the steric hindrance of the material is increased, the material is not easy to rotate, and a three-dimensional space structure is more stable; and therefore, the compound has higher glass transition temperature and molecular thermal stability. In addition, the HOMO and LUMO distribution positions of the compound are separated from each other, so the compound has appropriate HOMO and LUMO energy levels; and therefore, after the compound is applied to the OLED device, the luminous efficiency of the device can be effectively improved, and the service life of the device can be effectively prolonged.

A near-infrared boron dipyrromethene (BODIPY) compound based on a duplex heterocyclic pyrrole group has the structure as follows (refer to the Specification), wherein the substituent group M, N, P, E, F, M', N', P', E' or F' refers to H or Br. The invention synthesizes a big conjugated BODIPY photosensitizer taking duplex thieno pyrrole as a parent for the first time. Due to introduction of two thiophene groups, the absorption spectrum of the photosensitizer is shifted to 680 to 720 nm in a red shift mode, the emission peak is 716 to 750 nm and is in the range (650 to 900 nm) of a biological window, and the fluorescence quantum efficiency of the dye is high. The molar absorption coefficient of the photosensitizer in solution is up to 200,000 M<-1>cm<-1>. S in the two thiophene groups refers to heavy atoms, so that the triplet efficiency of the photosensitizer is increased, the generation efficiency of singlet oxygen is increased, and attractive application prospect in the aspects of bioimaging and photodynamic therapy is achieved.

The invention discloses a perylene diimide-rhodamine fluorescent probe, and a preparation method and an application thereof. The fluorescent probe has the following structural formula. The invention also discloses a preparation method of the fluorescent probe and an application thereof. The perylene diimide-rhodamine fluorescent probe provided by the invention has good solubility and a fluorescent probe property of good sensitivity. The fluorescent probe can be used as a near-infrared fluorescence emission sensitive pH fluorescent probe and a mercury ion fluorescent probe. The fluorescent probe has important application values in the fields of fluorescent switch and sensor, fluorescent probe, bio-marker and fluorescent imaging, organic light-emitting device, and the like.

The invention discloses a carbon quantum dot solution which contains carboxyl and emits reddish orange fluorescent light and a preparing method thereof and relates to the technical field of quantum dot luminescence. The carbon quantum dot solution which contains carboxyl and emits reddish orange fluorescent light and the preparing method thereof aim to solve the problems of existing red-light-emitting materials that quantum efficiency is low, service life is short, and color purity is low, and the problems of existing red-light-emitting material preparing methods that complexity is high and cost is high. Maleic anhydride and o-phenylenediamine are dissolved in absolute ethyl alcohol and placed in a polytetrafluoroethylene reaction still; ultrasonic treatment and stirring are conducted in sequence; the reaction still is placed in a steel kettle, heating and natural cooling are conducted, and then a reactant is taken out after temperature is reduced to be room temperature; the reactant is filtered, and then the carbon quantum dot solution which contains carboxyl and emits reddish orange fluorescent light is obtained. The method is simple, easy to operate, low in cost and high in yield. The carbon quantum dot solution obtained with the method is high in fluorescence quantum efficiency, high in stability, capable of being placed in the air for a long time, and high in color purity. The carbon quantum dot solution is suitable for serving as a red-light-emitting material, and the method is suitable for preparing the carbon quantum dot solution which emits reddish orange fluorescent light.

The invention discloses a compound with pyridine as a core and application thereof in an organic electroluminescence device. The compound has the advantages that molecules are not prone to crystallization or aggregation and have a good film-forming property. By means of rigid groups in the compound molecules, thermostability of the material can be improved, the compound can be used as a luminescent layer material applied to an OLED, and a manufactured OLED device has high photoelectric property and can meet the requirement of a panel manufacturing enterprise better.