350 results about "Fluorescent materials" patented technology

A light-emitting element includes an anode, a cathode, and an electroluminescent layer between the anode and the cathode. The electroluminescent layer includes an emission layer containing a host material and a first fluorescent material. A bandgap of the host material is equal to or greater than 3.0 eV and equal to or less than 3.4 eV. A difference in a level of a lowest unoccupied molecular orbital between the host material and the first fluorescent material is equal to or greater than 1.0 eV. A difference in a level of a highest occupied molecular orbital between the host material and the first fluorescent material is equal to or less than 0.3 eV

A method and a system have been developed to calibrate the total spectral radiance factor (TSRF) obtained from different instruments. A broad-band light source covering the whole visible range as well as the fluorescence excitation wavelengths is used to measure the TSRF, and one or more narrow-band light sources outside of the fluorescent band is used to measure fluorescent spectral radiance factor (FSRF) separately. After that, the TSRF is adjusted by the FSRF, and a calibrated TSRF can be obtained. This can be applied to characterize Optical Brightening Agents (OBAs) as well as other fluorescent materials without requiring any moving part of the instrument to do the calibration.

The invention discloses a graph pattern generation method based on a Clarii graph, and relates to the technical field of information, and the method comprises the steps: constructing an extended fluorescent material calibration module, introducing a saturation critical light intensity reference value, and carrying out the calibration of the Clarii graph under the dual constraints of color temperature deviation distribution and brightness standard deviation; according to the method, the pattern contrast change condition is recognized through the adjusted pattern contrast, a correction index is formed, the LED backlight wavelength is corrected for the second time according to the correction index, pattern structure deviation information is fed back to a spectrum control link, and the color uniformity of the LED backlight is improved. According to the scheme, on the premise of ensuring uniform fluorescence response and inhibiting bright spots, dark spots and stripes, the Clariy pattern can be kept stable, clear and layered in an actual application environment.

The invention discloses nitrogen-doped carbon quantum dots derived from American cockroach dregs as well as a preparation method and application of the nitrogen-doped carbon quantum dots, and belongs to the technical field of nitrogen-doped carbon quantum dots. The nitrogen-doped carbon quantum dots are prepared from the American cockroach dregs by a one-step hydrothermal method, optimal synthesis parameters are obtained through experimental optimization of synthesis conditions, and the prepared nitrogen-doped carbon quantum dots have excellent optical characteristics and stability; the invention also provides an application of the nitrogen-doped carbon quantum dot in Ag < + > detection, the nitrogen-doped carbon quantum dot has good selectivity, sensitivity and anti-interference performance on Ag < + >, a detection mechanism is an internal filtering effect and light-induced electron transfer, and the nitrogen-doped carbon quantum dot can be used as a preferred fluorescent material of an Ag < + > fluorescent sensor. The nitrogen-doped carbon quantum dots synthesized by the method not only have an Ag < + > sensing function, but also realize high-valued utilization of medicine residues, and also provide a new thought for self-doping of heteroatoms.

The present application relates to fluorescent material technical field, especially based on benzopentacyclic / septacyclic structure's carbonyl nitrogen type fluorescent material and its preparation method, the present application provides the preparation method with carbazole as raw material, in the synthesis process, the aldehyde group precursor is directly oxidized to acid by using strong oxidant, then the intermediate is made to occur intramolecular Friedel-Crafts reaction by acid catalyst, finally the carbonyl / nitrogen type fluorescent material of inlaid non-benzene structure is synthesized.This structure inhibits molecular relaxation through multiple resonance effect, and then realizes narrow band emission characteristics.At the same time, the structure retains higher photoluminescence quantum yield.The carbonyl nitrogen type fluorescent material based on benzopentacyclic / septacyclic structure provided by the present application is different from the existing all benzene type polycyclic aromatic hydrocarbons, so as to effectively widen the molecular system of carbonyl / nitrogen type narrow band light emitting material.

The invention discloses a preparation method of traceable polyester staple fibers, which comprises the following steps: mixing a tracing raw material and a renewable synthetic fiber raw material, and carrying out melt spinning to obtain the traceable regenerated polyester staple fibers, the tracing raw material comprising at least two of cobalt Prussian blue analogues, germanate fluorescent materials and metal oxides. The invention also provides a traceable polyester staple fiber product prepared by the preparation method. According to the method, two color changes under thermal stimulation and solvent stimulation of primary-color polyester fibers can be achieved, meanwhile, the tracing germanate fluorescent particles and the metal oxide tracing particles are added to make up for the defect that color changes are difficult to recognize after the fibers are dyed, and meanwhile the tracing means is complicated, so that the fibers are difficult to counterfeit.

The application discloses a blue fluorescent molecule, which has a D-pi-A structure, contains an oxadiazole as an acceptor group and a phenyl carbazole as a donor group, and connects the acceptor group and the donor group with an aromatic ring having a thermal excitation energy level arrangement characteristic as a pi bridge. The application also provides a preparation method and application of the blue fluorescent molecule. The application uses the aromatic ring having the thermal excitation energy level arrangement characteristic as the pi bridge, reasonably regulates a high-energy excited state of the acceptor by introducing the donor, activates a thermal excitation channel of the molecule, breaks through a limitation of 25% of an excitation utilization rate of a fluorescent material, and thus improves the excitation utilization rate.

This invention discloses a method, system, and fluorescent mixed-spray device for detecting and evaluating inclined roadways in open-pit mines. The method includes: performing fluorescent material spraying and optical observation in at least two boreholes along the target exploration line; determining the spatial connectivity of roadway cavities between boreholes based on the observation results; acquiring roadway profile area data perpendicular to the exploration line at each borehole location for roadway sections determined to be connected; calculating a quantitative index characterizing the degree of profile morphology change based on the profile area data; and adaptively selecting a corresponding volume calculation model to calculate the volume of the roadway cavity based on a comparison of the quantitative index with a preset threshold. This invention combines rapid qualitative assessment of spatial connectivity based on fluorescence with accurate adaptive volume calculation based on morphological variation coefficients, using a single integrated technical process to simultaneously solve the problems of high exploration costs and low calculation accuracy in traditional methods.

A fastener has enhanced visibility by a fluorescent material coating applied to recessed surfaces formed in a strike surface of the head of the fastener. The fluorescent material coating on the recessed surface is protected by the raised strike surface of the fastener from being impacted by a tool and worn or chipped from the fastener. The fluorescent material of the coating will fluoresce when exposed to ultraviolet radiation light thereby enhancing the visibility of the fastener.

The invention provides a display panel and electronic equipment, the display panel comprises a plurality of light-emitting devices, the plurality of light-emitting devices are arranged in an array, each light-emitting device comprises a light-emitting layer, the light-emitting layer comprises a sensitization layer, an isolation layer and a doping layer which are stacked in sequence, the sensitization layer comprises a main body material and a sensitization material, the mass of the main body material of the sensitization layer accounts for more than or equal to 50% of the mass of the sensitization layer, the doping layer comprises the main body material and a luminescent material, the mass of the main body material of the doping layer accounts for more than or equal to 50% of the mass of the doping layer, and the isolation layer comprises the main body material. The mass of the main body material of the isolation layer accounts for more than or equal to 80% of the mass of the isolation layer. According to the embodiment of the invention, triplet excitons in the sensitizer can be prevented from being transferred to the doping layer through energy, so that the service life of a fluorescent material in the doping layer is not influenced.

The present invention provides a Zn-MOF material for high-sensitivity and high-selectivity detection of ATP / ADP, and a preparation method therefor and a use thereof. The Zn-MOF material uses zinc as a metal center and H2PDBA as a ligand. The chemical molecular formula of the Zn-MOF material is [C34H30N2O4Zn]n, wherein n represents an infinite alternating arrangement of the simplest molecular formula in the internal molecular composition of the material. The present invention further provides a preparation method for the Zn-MOF material. The preparation method comprises adding H2PDBA and an inorganic zinc compound to a first organic mixed solution and placing the mixture in a reaction kettle for a reaction to obtain the Zn-MOF material. The Zn-MOF material of the present invention can realize high-selectivity detection of ATP / ADP in water. In addition, a new fluorescent material is provided for the detection of ATP / ADP, and new ideas are provided for rationally constructing more stable MOFs in terms of structural design.

The invention discloses a temperature measuring device based on a fluorescent material, and the device comprises a housing which comprises an upper cover, a housing pedestal, an LED light source, a fluorescent material, an optical fiber probe, an optical fiber spectrometer, an optical fiber, a console, a display screen, a charging device, a charging hole, a charging line, and a data exchange interface. The temperature measurement method based on the fluorescent material comprises the steps of database input, fluorescent material excitation, light sample collection, light component analysis, light parameter transmission, temperature value calculation and temperature value feedback.

An oxide fluorescent material comprises: at least one first element M1 selected from Li, Na, K, Rb, and Cs; at least one second element M2 selected from Mg, Ca, Sr, Ba, and Zn; at least one third element M3 selected from B, Al, Ga, In, and rare earth elements; at least one fourth element M4 selected from Si, Ti, Ge, Zr, Sn, Hf, and Pb; O; and Cr, wherein when the molar ratio of the at least one fourth element M4 in 1 mol of the composition is 5, the molar ratio of the at least one first element M1 is 0.7 or more and 1.3 or less, the molar ratio of the at least one second element M2 is 1.5 or more and 2.5 or less, the molar ratio of the at least one third element M3 is 0.7 or more and 1.3 or less, the molar ratio of oxygen is 12.9 or more and 15.1 or less, and the molar ratio of Cr is more than 0 and 0.2 or less, and wherein the oxide fluorescent material has a light emission peak wavelength in a range of 700 nm or more and 1,050 nm or less in a light emission spectrum of the oxide fluorescent material.

The application discloses a double-line ratio fluorescent competitive immunochromatographic detection device and a preparation method and application thereof, and relates to the technical field of immunochromatographic detection.The detection device comprises a double-specificity recognition unit mixed-labeled quenched fluorescent probe, a background fluorescent material and a solid phase substrate, the solid phase substrate is provided with a T line on which a target object binding ligand is immobilized and a C line on which a quality control ligand is immobilized; and the application also provides application of the detection device in detection of exogenous harmful substances.The application solves the technical problem of low detection sensitivity of the existing method, and adjusts the binding amount of the probe on the T line and the C line through an immune competition reaction, adjusts the quenching degree of the background fluorescence based on an internal filter effect, takes (T line quenched fluorescent signal / background fluorescent signal) / (C line quenched fluorescent signal / background fluorescent signal) as a quantitative signal, and takes the C line to participate in ratio calculation to improve the detection sensitivity, so that the application is suitable for high-sensitivity qualitative and quantitative detection of small molecule compounds and the detection sensitivity is improved.

The application discloses a kind of Mn 4+ Activated fluorine (oxygen) oxide red fluorescent material and its preparation method;The application uses organic-inorganic hybrid fluoride manganese salt material as Mn 4+ Source preparation Mn 4+ Activated fluorine (oxygen) oxide red fluorescent material.The application uses organic-inorganic hybrid fluoride manganese salt material instead of all-inorganic fluoride manganese salt, manganese salt and permanganate as Mn 4+ Source, for preparing Mn 4+ Activated fluorine (oxygen) oxide red fluorescent material, significantly improve the luminescent efficiency of Mn 4+ Activated fluorine (oxygen) oxide red fluorescent material.

This application discloses a crystal, a rare-earth-doped crystal, its preparation method, and its applications, belonging to the field of crystal materials. The chemical formula of the crystal is [Gd(L)]. 1.5 (DMA)] n Formula I; in Formula I, L is a ligand formed by deprotonated benzene polycarboxylic acid; benzene polycarboxylic acid is selected from any one of terephthalic acid, phthalic acid, and isophthalic acid; DMA is N , N -Dimethylacetamide; n ∞ represents continuous repetition and infinite extension. The crystal is rare-earth doped, and the chemical formula of the rare-earth doped crystal is [Gd]. 1‑x% (L) 1.5 (DMA)] n :x% Ln 3+ Equation II; in Equation II, x = 0.1~10; Ln 3+ Selected from Tb 3+ Or Eu 3+ Any one of the following. It has potential application value in fields such as fluorescent materials, multicolor display materials, long afterglow materials, X-ray detection and imaging materials, radiation detection dosimeters, and optical information encryption. The preparation method used in this application can be easily achieved through solution reaction under relatively mild conditions, with low cost and strong industrial feasibility.

The invention discloses a phenanthroimidazole-based Fe < 3 + > specific recognition fluorescent probe and application thereof. The fluorescent probe takes a phenanthroimidazole group as an electron donor unit and takes a benzene ring and a fluorine atom substituted benzene ring as an electron acceptor unit. An imidazole group and a fluorine atom are respectively introduced in the directions of a short axis and a long axis of a molecule, so that fine regulation and control of excited state properties are realized, vibration coupling in a first singlet excited state is effectively inhibited, high-purity blue light emission is obtained, and the photophysical properties of the material are remarkably improved. The fluorescent material is simple and convenient in synthesis method, easy to purify, excellent in thermal stability and remarkable in signal response, and has a wide application prospect in detection of Fe < 3 + > in a high-temperature industrial environment.

To provide an organic electroluminescent element with high stability and suppressed roll-off, using a combination of delayed fluorescence material and multi-resonance type luminescent material in the light-emitting layer. [Solution] The organic electroluminescent element of the present invention is characterized in that the light-emitting layer includes at least a delayed fluorescence material and a multi-resonance type light-emitting material, a substituent is introduced into the multi-resonance type condensed ring skeleton constituting the multi-resonance type light-emitting material, and the difference in HOMO energy levels between the multi-resonance type light-emitting material and the delayed fluorescence material is 0.4 eV or less.

The invention relates to the technical field of biomedical detection and functional organic fluorescent materials, in particular to synthesis and application of a single-molecule probe combining BODIPY (boron dipyrromethene) and a semi-cyano dye. Comprising the following steps: preparing an intermediate 1: reacting 4-hydroxybenzaldehyde with 2, 4-dimethyl pyrrole to generate BDP-OMe, and then reacting with pyridinium chlorochromate to obtain the intermediate 1; preparation of an intermediate 2: carrying out reflux reaction on 2, 3, 3-trimethyl-3H-indole and 2-bromoethanol in ethanol to obtain the intermediate 2; and synthesizing a final product: heating the intermediate 1 and the intermediate 2 in toluene to react, and performing post-treatment and column chromatography purification to obtain the probe CyB-C. The bimodal detection capability enables the probe to simultaneously distinguish the microenvironment difference between normal cells and cancer cells and monitor diseases related to viscosity abnormity.

A non-sintering technique is used to prepare a fluorescent thin film for laser lighting. This fluorescent film comprises a 0.5–2 mm thick aluminum substrate with a visible light reflectance greater than 95%, and a 100–500 μm thick emitting layer on the aluminum substrate. The emitting layer is obtained by mixing a fluorescent material and a fixative at 40–80 °C using a non-sintering technique. Under blue light excitation at 450 nm, the light emitted by the emitting layer mixes with unabsorbed blue light to produce white light with a color temperature range of 3000 K–4500 K and an Ra value of 90–98. The fluorescent thin film for laser lighting prepared by this invention has a simple overall structure and a convenient preparation process; the nitride red fluorescent material is not sintered, thus greatly preserving its luminescent properties; and the preparation process does not use water, which would decompose the nitride red fluorescent material; the fluorescent film is directly coupled to a highly thermally conductive aluminum plate, thereby enabling the fluorescent film to be used in laser lighting.

The application belongs to the technical field of functional polyurethane materials, and more particularly relates to a polyurethane fluorescent material applicable to bacterial detection and a preparation method thereof. The polyurethane pre-polymer is obtained by pre-polymerization of a hydrophobic polyether monomer, isocyanate, a catalyst and a hydrophilic solvent; a chain extender is added to the pre-polymer for chain extension reaction, and then a capping agent is added for capping reaction, and after curing, a polyurethane elastomer is obtained; the polyurethane elastomer is mixed with an ethanol solution, curcumin is added, and stirred uniformly to obtain a fluorescent polyurethane solution, and curing obtains a polyurethane-based fluorescent material. The polyurethane fluorescent material applicable to bacterial detection is designed through a polyurethane segment, ensures solid-state light emission of curcumin, does not cause fluorescence quenching, ensures activity of a heat-sensitive base material at room temperature, and the fluorescent color is different under different bacterial concentrations, and the response is sensitive.

The invention discloses a radiation refrigeration material, a preparation method and a preparation device, and the radiation refrigeration material comprises a primer layer, a middle paint layer and a finish paint layer, the primer layer is doped with titanium dioxide nano particles; the middle paint layer is doped with aluminum oxide or barium sulfate nanoparticles; and the finish paint layer is doped with silicon dioxide nanoparticles and a fluorescent material. The preparation method of the radiation refrigeration material comprises the following steps: S1, respectively preparing the primer, the intermediate paint and the finish paint through weighing, stirring, grinding and filtering processes; s2, the surface of an object is coated with primer, and a primer layer is formed; s3, the surface of the primer layer is coated with intermediate paint, and an intermediate paint layer is formed; and S4, the surface of the middle paint layer is coated with finish paint to form a finish paint layer. The radiation refrigeration material preparation device comprises a stirring barrel, a stirring shaft and a feeding pipe. According to the scheme, the spectral selectivity, durability, environmental friendliness and attractiveness of the refrigeration material can be effectively guaranteed.

A light emitting device includes a light emitting element having a light emission peak wavelength of 430 nm or more and 470 nm or less, and a fluorescent member containing a first fluorescent material having a light emission peak wavelength of 510 nm or more and less than 590 nm and a second fluorescent material having a light emission peak wavelength of 590 nm or more and 670 nm or less and containing a first fluoride fluorescent material having a composition included in the compositional formula represented by the following formula (1):where A1 includes K, M1 includes Si and Al, a and b satisfy 0<a<0.2 and 5<b<7, and c represents the absolute value of the charge of [M11-aMnaFb] ions.The light emitting device satisfies the following condition (A) or (B):the condition (A) is that an average color rendering index Ra is 80 or more and 90 or less and a color rendering index R9 is 50 or more and 90 or less; andthe condition (B) is that an average color rendering index Ra is 80 or more and 87 or less and a color rendering index R9 is 50 or more.

The invention provides a Zn-BTC-RhB MOF material as well as a preparation method and application thereof, and belongs to the technical field of fluorescent materials. The Zn-BTC-coated RhB MOF material provided by the invention is used as a Cu < 2 + > fluorescent probe, Cu < + > can initiate probe ratio luminescence response, the luminescence color gradually changes from blue violet to orange yellow, visual detection by naked eyes is realized, high sensitivity and visual detection functions on Cu < 2 + > are realized, and the Zn-BTC-coated RhB MOF material integrates the advantages of high sensitivity, quick response, good stability, strong anti-interference performance, visual detection and the like.

The present application relates to the field of fluorescent material, and disclose a kind of samarium activated garnet-based red fluorescent powder, including Na, Gd, Sm, Ga, In and Ge, wherein, the amount-of-substance ratio of metal element is Na:Gd:Sm:Ga:In:Ge=1:2-2x:2x:2:1:2, x is the doping amount of samarium in inert rare earth site, 0.01≤x<0.10, the fluorescent powder proposed in the present application utilizes new garnet matrix constructed by sodium, gadolinium, gallium, indium, germanium, and has significant advantages compared to the traditional garnet isomorphic system constructed by containing aluminum, silicon, alkaline earth metal in preparation process.By using the new matrix, the reaction temperature of solid-phase synthesis fluorescent powder is greatly reduced, and no auxiliary solvent is needed, and it can be synthesized in one step.The preparation method of the present application does not require specific pressure and atmosphere requirements during the reaction process.This means that the preparation process is more flexible, and does not require high-pressure equipment or complex atmosphere control, simplifying the operation steps, improving the efficiency and feasibility of preparation.

The invention relates to the technical field of luminescent materials, in particular to a red fluorescent material, a preparation method and application thereof, a lower transfer layer and preparation of the lower transfer layer, the red fluorescent material has a chemical formula of K < 0.5 > La < 0.5 > Sr Mg < 1-x > (W < 1-y > Tey) < 1-z > O6: zMn < 4 + >, xLu < 3 + >, wherein 0 lt; x is less than or equal to 0.1, 0lt; y is less than or equal to 0.5, 0lt; and z < = 0.05. The material can be excited by visible light and near ultraviolet in sunlight and can emit red light at the same time, namely sunlight in the wavelength range of 300-600 nm is converted into dark red light in the wavelength range of 600-800 nm, the problem that a silicon-based solar cell is poor in short-wavelength photoelectric conversion efficiency is solved, and the photoelectric conversion efficiency of the silicon-based solar cell is improved.

The invention relates to a chromium ion single-doped ultra-wideband near-infrared fluorescent material, a preparation method thereof and an LED device, and belongs to the technical field of luminescent materials. The chemical composition formula of the material is Ca2Sc1-yYyGa3-3xSn2O12: xCr, x is larger than or equal to 0.003 and smaller than or equal to 0.10, and y is larger than or equal to 0.00 and smaller than or equal to 1.00. The material is high in phase purity, simple in preparation process, simple and convenient to operate, environment-friendly and high in synthesis efficiency. Under excitation of 475-500 nm, the emission spectrum of the material covers the range of 600-1600 nm, the material has high luminous intensity in a first near-infrared region (about 855 nm) and a second near-infrared region (about 1300 nm), and the full width at half maximum can reach 200-655 nm. Meanwhile, the material has good absorption in the range of 400-700 nm, can be effectively matched with a commercial blue light LED chip, and is suitable for preparing a high-performance near-infrared LED light source. Compared with the prior art, the material provided by the invention not only can realize ultra-wideband emission covering a first near-infrared area and a second near-infrared area, but also is adjustable in emission peak position and high in absorption characteristic and commercial blue light chip compatibility, and is beneficial to development of high-efficiency and high-stability near-infrared LED devices.

The invention belongs to the technical field of organic photoelectric materials, and discloses a blue fluorescent compound and application thereof in an organic electroluminescent device. The blue fluorescent material disclosed by the invention is one of structures shown in a formula I or a formula II. The blue fluorescent compound contains a dioxin structure, oxygen heteroatoms in the dioxin structure provide richer acting force among molecules, a better basis is provided for improving mobility and triplet state-triplet state up-conversion efficiency, the blue fluorescent compound is used for organic electroluminescent devices, and the organic electroluminescent devices have good application prospects. The current efficiency, the power efficiency and the external quantum efficiency of the device are remarkably improved, and the blue index is higher.

The invention provides a Zn-MOF material for high-sensitivity and high-selectivity detection of ATP / ADP as well as a preparation method and application of the Zn-MOF material, the Zn-MOF material takes zinc as a metal center and H2PDBA as a ligand, the chemical formula of the Zn-MOF material is [C34H30N2O4Zn] n, and n represents that internal molecules of the material are infinitely and alternately arranged with the simplest molecular formula; the invention also provides a preparation method of the Zn-MOF material, and the preparation method comprises the following steps: adding H2PDBA and an inorganic zinc compound into a first organic mixed solution, and placing in a reaction kettle for reaction to obtain the Zn-MOF material. The Zn-MOF material provided by the invention can realize high-selectivity detection of ATP / ADP in water, provides a new fluorescent material for ATP / ADP detection, and provides a new thought for reasonably constructing more stable MOFs from structural design.