33results about How to "Good luminous performance" patented technology

The invention provides quantum dot ink which comprises polar solvent, a surface tension adjusting agent, a charge transmission agent and quantum dots, and the quantum dots are polymerizable. After the quantum dot ink is printed, a more stable quantum dot light-emitting layer can be obtained, a long service life is achieved, and better light-emitting performance is achieved. The invention further provides a quantum dot light-emitting diode and a preparation method thereof.

The invention belongs to the field of agricultural light-light conversion functional materials, and discloses a light conversion agricultural film using nitride red phosphor as a light conversion agent, and a making method and an application thereof. The light conversion agricultural film mainly comprises a light conversion agent master batch, and the light conversion agent master batch comprises, by mass, 10-50% of the nitride red light conversion agent, 1-10% of an assistant, and the balance of a master batch matrix. The nitride light conversion agent well matches with spectra required by plant photosynthesis, has excellent red long afterglow luminescence performance through trivalent rare earth ion co-doping and cation replacement, and can provide red orange light required by plant photosynthesis for a long time under night or sunless conditions to prolong the plant photosynthesis. The nitride light conversion agent is processed to form the master batch, and the master batch is used to make the agricultural film, so the light conversion agent is pre-dispersed, thereby the dispersion of the nitride light conversion agent in the film matrix is improved, and yield increase and quality improvement effects are reached when the agricultural film is applied in the agriculture field.

The invention relates to a fluorene based water soluble conjugated polymer, process for preparing same and use in chemical / biological detection, wherein fluorenes compounds containing substituent groups are used as raw material for synthesizing water-soluble conjugated polymer with fluorenes as the conjugated chain primary structure through a series of organic reactions including metallic catalyse, the synthesized polymeric compound has fine light-emitting performance, and has good fluorescent quenching effect to certain specific groups or compounds.

The invention belongs to the field of a light-emitting material, and discloses metal particle doped indium salt-based phosphor and a preparation method thereof. The general chemical formula of the indium salt-based phosphor is Re'1-xRe''InO3:yM; wherein Re' is one or two of Y, La and Sc; Re'' is one or two of Tm, Tb, Eu, Sm, Gd, Dy and Ce; M is one or two of Ag, Au, Pt and Pd nanoparticles; and x is 0.001-0.2; and y is 5*10-5 to 5*10-2. Metal nanoparticles are introduced into the indium salt-based phosphor, the light-emitting strength is greatly improved by surface plasmon resonance effects produced on metal surfaces, and the degree of improvement can reach 40 percent. Meanwhile, under low-voltage (0.5-3kV) excitation, the phosphor has the advantages of good light-emitting performance, high internal quantum efficiency, high chemical stability, good stability and the like.

The invention discloses fluorescent glass ceramic, a preparation method of the fluorescent glass ceramic and application of the fluorescent glass ceramic in preparing a laser light source. The preparation method includes the steps that alpha-Si3N4, AlN, Al2O3 and Eu2O3 are subjected to heat preservation for 1-5 h at the temperature of 1500-2400 DEG C and the pressure intensity of 0.6-1.4 Mpa, the product is ground and sieved after being cooled, and Eu-doped Si-Al-O-N green fluorescent powder is obtained; the Eu-doped Si-Al-O-N green fluorescent powder and glass powder are subjected to heat preservation for 45-120 min at temperature of 450-700 DEG C after being mixed, and the fluorescent glass ceramic is obtained. The prepared green fluorescent powder is excellent in luminescence performance, the fluorescent glass ceramic prepared from the fluorescent glass ceramic compounded with the low-melting-point glass powder is excellent in heat stability, capable of being used for preparing the laser light source and resistant to blue light, the luminescence performance is not influenced, and the phenomenon of material deterioration or color changing will not occur in long-time high-temperature operation.

The invention discloses a rear earth doped non-fullness tungsten bronze luminescence ferroelectric material and a preparation method thereof. The chemical formula of the rear earth doped non-fullness tungsten bronze luminescence ferroelectric material is Ba1La[1-x]EuxTiNb9O30, wherein x is larger than or equal to 0 and less than or equal to 1. According to the invention, Ba1La[1-x]EuxTiNb9O30 porcelain is prepared by adopting a simple solid-phase reaction method, so cost is low, operation is convenient, and large-scale production is facilitated. The Ba1La[1-x]EuxTiNb9O30 porcelain has good luminescence performance and also has good dielectric property and ferroelectric property, is a novel and important multifunctional porcelain material and has wide application prospect in the field of photoelectric materials.

The invention discloses high-brightness borate-based green fluorescent powder for a white light-emitting diode (LED) and a high-temperature reduction preparation method thereof, and belongs to a preparation technology for the green fluorescent powder applied in the fields of white LEDs, mobile display equipment background lamps, light-storing materials and the like. A series of borate green fluorescent powder coactivated by Ce<3+>-Tb<3+> is prepared by a high-temperature solid phase reduction method, wherein the structural formula is Na3La2-x-yCexTby(BO3)3 (x is more than 0 and less than or equal to 0.5 and y is more than 0 and less than or equal to 0.4). The fluorophor can be effectively activated by near ultraviolet light (335nm) to emit green light, wherein the main emission peak value is 543 nm. In the process of preparing the products by the high-temperature solid phase method, the green fluorescent powder for the white LED is prepared by adding 5 mass percent of excessive H3BO3 in a stoichiometric ratio and performing ultrasonic aftertreatment.

The invention discloses a cage type low polysilsesquioxane and a rare earth ion light-emitting material. 1,3,5,7,9,11,14-heptaisobutyltricyclo[7.3.3.15,11]heptasiloxane-endo-3,7,14-triol is used as a matrix, and an alpha-thenoyltrifluoroacetone silanization derivative, a dipyridyl silanization derivative and a terpyridyl silanization derivative are used as angle complementing bodies, and the complementing bodies react with the matrix in an angle complementing manner to form the complete novel cage type low polysilsesquioxane; and the novel cage type low polysilsesquioxane is combined with a rare earth element to form a cage type low polysilsesquioxane (POSS) / rare earth ion light-emitting material. The rare earth compound / low polysilsesquioxane material is rich in light-emitting colors, is high in color purity, long in fluorescence lifetime (0.5-1.5ms), high in quantum efficiency (20), and strong in heat stability (350 DEG C) and light stability, is a valuable optical material, and can be applied to the fields of display and development, new light sources, X ray intensifying screens and the like.

The invention discloses a copper (I) phosphorine heterocyclic complex and a preparation method and application thereof. The structural formula of the copper (I) phosphorine heterocyclic complex is shown in the formula I. In the formula, X represents a halogen element. The complex has good phosphorescence performances at the room temperature and 77K, lifetime of about 100 microseconds at the room temperature and lifetime of about 2 milliseconds at 77K. In a range of 77K to 297K, the lifetime of the complex has high dependence on the temperature. The lifetime of a sensor prepared from the complex has high linear dependence on the temperature. The complex has excellent sensitivity and stability and a very wide temperature response range of 77K to 337K. The invention discloses a copper (I) metal complex fluorescence temperature sensor in a visual temperature-life linear relationship. The copper (I) metal complex fluorescence temperature sensor has the advantages of low cost, simple preparation process and great application prospect.

The invention relates to the field of flexible wearable luminescent devices, in particular to a composite luminescent fiber and a preparation method and application thereof. The composite luminescentfiber comprises a polymer and aggregation-induced emission (AIE) molecules, wherein the curing temperature of the polymer is 0-300 DEG C. According to the composite luminescent fiber, because the AIEmolecules which have high luminescent capability under ultraviolet excitation are contained in the fiber and the polymer is high in softness and stretchability, the formed composite luminescent fiberhas excellent luminescent capability and is highly stretchable.

The invention discloses an asymmetric heat-activated delayed fluorescent material, a synthesis method and application thereof. The material has a structural formula shown as formula (1) in the specification, wherein Ar1 and Ar2 are aromatic amine substituent groups of different structures. The invention simultaneously discloses a synthesis method of the asymmetric heat-activated delayed fluorescent material, and also discloses a non-doped OLED device, wherein a luminescent layer is prepared from the asymmetric heat-activated delayed fluorescent material. The asymmetric heat-activated delayed fluorescent material disclosed by the invention has circularly polarized luminescence and aggregation-induced luminescence properties, good thermal stability and excellent luminescent properties, and the synthesis method and purification process are simple. The non-doped OLED device prepared from the heat-activated delayed fluorescent material as the luminescent layer has high luminance and good stability, so that both the luminous efficiency and service life of the OLED device can meet the practical requirements.

The invention relates to a preparation method for terbium oxide and yttrium oxide co-stabilized zirconia nano fluorescent ceramic powder. The preparation method comprises the steps of weighing zirconium oxychloride octahydrate, a terbium raw material and a yttrium raw material respectively according to stoichiometric ratio of various metal elements in (Tb4O7)x(Y2O3)y(ZrO2)1-4x-2y (wherein 0.010 <= x+ y <= 0.150, 0.002 <= x <= 0.040), dissolving the terbium raw material and the yttrium raw material and transferring the terbium raw material and the yttrium raw material into a mixed solution of corresponding nitrate, and dissolving the zirconium oxychloride octahydrate in the mixed solution; (2) adding a soluble salt and an organic fuel in the mixed solution obtained by the step (1); heating to dissolve the soluble salt and the organic fuel, continuously heating the solution into a sticky state, putting the obtained sticky material in a heating furnace cavity at a temperature of 400-1,000 DEG C and igniting; and (3) washing, filtering and drying a product obtained by the step (2). The prepared powder particles are spheres which are uniform in size and good in dispersion. The particle size of crystals is 3-7 nm; and a specific surface area can reach 269 m<2>.g<-1>. The preparation method is simple in process, easily available in raw materials, low in equipment requirements and short in synthesis time, can form a phase in one step, and is low in energy consumption and low in cost.

The invention relates to quantum dots and a preparation method thereof. Surfaces of the quantum dots are bound with a rigid ligand, and the rigid ligand is coordinately bound with metal atoms on the surfaces of the quantum dots. The structural formula of the rigid ligand is R1-CONH-R2, wherein R1 is C6-C18 alkyl, R2 is H atom, or R2 is C6-C18 alkyl. According to the quantum dots and the preparation method thereof, because motion activity of a rigid chain is lower, the rigid ligand cannot fall off the surfaces of the quantum dots by violent motion even in a higher temperature environment, and thermal stability of the quantum dots is significantly improved.

The invention relates to a luminescent polyvinyl alcohol material and a preparation method thereof. The preparation method comprises the following steps: dissolving polyvinyl alcohol, aldehyde acid and a europium ion compound in a solvent, adjusting the pH value to neutrality or alkalinity, performing thermal synthesis reaction for 0.5-24h in a hydrothermal solvent at 60-140 DEG C, and performingdrying to obtain the luminescent polyvinyl alcohol material. By the thermal mode of the hydrothermal solvent, the valence states of some europium ions are changed; by combination with the aldehyde acid with two functional groups, simultaneously, the europium ions with different valence states are bonded to polyvinyl alcohol molecules, thereby obtaining the luminescent polyvinyl alcohol material with adjustable luminescent color; and furthermore, adverse effects caused by single physical mixing are overcome, and the compatibility between europium ions and polyvinyl alcohol is good. The obtainedluminescent polyvinyl alcohol material is high in brightness and has good light transmittance and excellent mechanical properties; and the luminescent polyvinyl alcohol material with adjustable luminescent color has important application values in the aspects of decoration, counterfeiting prevention, illumination and display.

The invention discloses a composite nano-particle for three-dimensional fluorescence imaging of a blood vessel network, and a preparation method thereof and an application thereof. The composite nano-particle includes 1-30 wt% of a fluorescent material used as a core and 70-99 wt% of an amino-modified polymer used as a shell layer. The fluorescent material has the advantages of controllable dimensions, good water dispersibility, high light stability, and simple and easy preparation process. The prepared composite nano-particle has the advantages of high fluorescence brightness, uniformity in dyeing, low interference of photobleaching and background fluorescence, low toxicity and low cost when used for the blood vessel imaging, can accurately mark the fine structure of the blood vessel network, and has potential practical values in in-vivo imaging, medical diagnosis, disease therapy and other important fields.

The invention belongs to the field of organic electroluminescent materials, and discloses a bis-carbazole pyridine compound and applications thereof. The provided compound has a structure representedby the formula (I), has a high triplet energy level, and can be used as a host material of a phosphorescence organic light emitting device (OLED), in particular, a blue phosphorescence OLED. Comparedwith a 2,6-bicarbazole pyridine host material commonly used in the field, a device prepared from provided bis-carbazole pyridine compound has a good light emitting performance and a long service lifeand can be used in industry.

The invention provides alkaline earth nitride fluorescent powder and a preparation method thereof. A chemical general formula is xM3N2-aSi3N4-bMY2:mR, wherein M is one kind or several kinds of Mg, Ca, Sr and Ba; Y is one kind or several kinds of F, Cl and Br; R represents one kind or several kinds of La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Tm and Yb selecting from rare earth elements; and a parameter range is 0.3<x<1, 0.1<a<2, 0<b<0.1, and 0.005<m<0.5. Products of the alkaline earth nitride fluorescent powder is prepared by adopting a direct high temperature solid-state reaction method, and the nitride fluorescent powder with a specific luminous center R and base elements with different percentage values is obtained. The fluorescent powder has good luminance performance in a visible light spectrum range, and when the fluorescent powder is excited by using light with wavelength ranging from 250 to 550 nm, an emission spectrum with the wavelength ranging from 500 to 750 nm can be obtained.

The invention discloses a method for preparing silicon dioxide hybridized quantum dot by using a one-pot method. The invention comprises the following steps of: adding a non-metal ion source needed for preparing quantum dots to a quantum dot metal ion source containing mercapto stabilizer in a water phase system, getting the precursor liquid of quantum dot under the protection of a nitrogen atmosphere, then adding the silicon dioxide to the precursor liquid of quantum dot and reacting the silicon dioxide with the precursor liquid of quantum dot to obtain the silicon dioxide hybridized quantumdot. The silicon dioxide hybridized quantum dot obtained in the invention has the advantages of good dissolubility, excellent luminous performance and optical stability, good biocompatibility and biological stability, and good prospect of application in the aspects of biomarker and function materials.

The invention discloses an ultraviolet or near ultraviolet inspired LED fluorescent powder and a preparation method thereof. The preparation method includes the following steps: weighing materials according to chemical expression of the fluorescent powder, namely Cd1-x-yWO4:Sb3, Eu3+y, wherein x is more than 0 and smaller than or equal to 0.03, and y is more than 0 and smaller than or equal to 0.05; respectively dissolving a compound containing Sb3+ and Eu3+ into bismuth nitrate and europium nitrate solution, and respectively dissolving a compound containing Cd2+ and WO42- into respective solutions; fully mixing antimony nitrate, europium nitrate and cadmium salt solution, and then adding tungstate solution; after finishing instilment, filtering tungstate sediment formed by the process, drying to prepare a precursor, grinding the precursor, then putting the precursor into a crucible and burning in air; after cooling the precursor to the indoor temperature, taking out and grinding the precursor to obtain samples. The tungstate fluorescent powder can emit blue light when being inspired by ultraviolet, or emit yellow light when being inspired by near ultraviolet, so as to be used for LEDs with different color requirements.

The invention relates to an organic compound and an organic light-emitting device using the same, and specifically relates to a soluble organic compound having excellent color purity and high luminance and light-emitting efficiency and an OLED device using the same. The structure of the organic compound provided by the invention is shown as a formula 1 in the description. In the structural formula, Ar1 and Ar2 are independently selected from substituted or unsubstituted C1-C30 alkyl, substituted or unsubstituted C10-C30 condensed ring group, substituted or unsubstituted C8-C30 heteroaryl, substituted or unsubstituted C13-C30 amine derivative or fluorene derivative; and Z represents a substituted or unsubstituted naphthalene derivative.

The invention provides monodisperse spherical white-light fluorescent powder for a white-light LED and a preparing method of the powder, and belongs to the technical field of rare earth light-emitting materials. The chemical general formula of the white-light fluorescent powder is (Y1-x-y-zGdxEuyBiz)2O3, wherein x is larger than or equal to 0 and smaller than or equal to 0.30, y is larger than or equal to 0.001 and smaller than or equal to 0.01, and z is larger than or equal to 0.0002 and smaller than or equal to 0.008. The preparation method includes the steps that raw materials are weighed, and an acid solution is added to dissolve the raw materials; a nitrogen-containing precipitator is added and stirred, the mixture is heated to 80-98 DEG C, and after white precipitate appears in the solution, the temperature is kept for 60-240 min; after the white precipitate is cooled, centrifugally separated, washed, dried and forged, the monodisperse spherical white-light fluorescent powder for the white-light LED is prepared. The prepared white-light fluorescent powder is single-matrix white-light fluorescent powder, a synthesis method is simple, the forging temperature is low, energy is saved, the yield is high, the repeatability is good, the defects that spectrum re-absorption exists in three-primary-color fluorescent powder and powder matching is difficult to control are effectively avoided, and the problem that light attenuations between multiple phases of fluorescent powder are not consistent is solved.

The invention discloses a europium-doped yttrium strontium triborate-based red fluorescent powder and a preparation method thereof. The general chemical formula of europium-doped yttrium strontium triborate-based red fluorescent powder is Sr3Y1-x(BO3)3:xEu, wherein x is greater than or equal to 0.01 and less than or equal to 0.15. The europium-doped yttrium strontium triborate-based red fluorescent powder can be effectively excited by near ultraviolet or blue light to emit red light with high color purity. According to tThe invention, prepares the red fluorescent powder is prepared on the basis of a solid-phase synthesis method, preparation is carried out under air atmosphere, the process is simple, the repeatability is good, the preparation period is short, no pollutants are discharged, the red fluorescent powder the invention is environmentally -friendly, and operation and industrial production are easy.

The invention discloses a carbon nitride paper-based fluorescence sensor for detecting polycyclic aromatic hydrocarbon, a preparation method thereof and application of the carbon nitride paper-based fluorescence sensor. According to the carbon nitride paper-based fluorescence sensor, a carbon nitride nano composite material is prepared; and the carbon nitride nano composite material is loaded on filter paper, so that the carbon nitride paper-based fluorescence sensor can be obtained. On the basis of the excellent luminescence property and film forming process of the carbon nitride, the carbonnitride is compounded with a high polymer material, and an obtained compound is loaded onto the filter paper, so that the carbon nitride paper-based fluorescence sensor can be obtained. By virtue of pi-pi interaction between the CNNS (carbon nitride nanosheet) and PAHs, generated fluorescence is quenched, so that the linear detection of the PAHs is carried out. With the carbon nitride paper-basedfluorescence sensor provided by the invention adopted, the problems of long detection period, complex operation, low stability and the like of the detection of polycyclic aromatic hydrocarbon in the prior art can be solved, the PAHs can be effectively detected. The sensor has the advantages of convenient and rapid detection, easiness in carrying, and high detection sensitivity.

The invention relates to a Mn<4+> doped red fluorescent material and a preparation method thereof. The general formula of the fluorescent material is (Mg1-yAy)2(Ti1-zBz)1-xO4: xMn<4+> (A = Ca, Sr, Ba;B=Zr, Si; 0.01 at% < / = x < / = 1.0 at%; 0 < / = y < / = 5 at%; 0 < / = z < / = 10 at%). The preparation method comprises the following steps OF: taking MgO, caCO3, SrCO3, BaCO3, TiO2, ZrO2, SiO2 and MnO2 as raw materials, weighing the raw materials according to the element molar ratio, after uniformly grinding in an agate mortar, carrying out high-temperature solid-phase reaction, adding a proper amount offluxing agent under the condition that a pure phase is guaranteed, and finally acquiring the Mn<4+> doped red fluorescent powder material ((Mg1-yAy)2(Ti1-zBz)1-xO4: xMn<4+>), the obtained Mn<4+> doped red fluorescent powder material having excellent red light-emitting performance. According to the prepared red fluorescent material, Mn<4+> is used as an activator, rare earth elements are not contained, raw materials and final products do not contain harmful substances such as fluorine, the preparation method is simple, and the production cost is low. The red fluorescent powder can emit red fluorescence with the wavelength range of 630-730 nm when excited by excitation light sources such as ultraviolet, near ultraviolet or blue light LEDs, and is suitable for being applied to the field of warm white light LED device illumination and display.

The invention belongs to the field of organic electroluminescent materials, and discloses a carbazole pyridine compound and applications thereof. The provided compound has a structure represented by the formula (I). The compound has a high triplet level and can be used as the host material of a phosphorescence organic light emitting device, in particular, a blue light phosphorescence organic lightemitting device. Compared with a 2,6-dicarbazole pyridine host material, which is commonly used in the field, a device prepared from the provided carbazole pyridine compound has a good light emittingperformance, at the same time, the service life of the device is long, and the compound can be used in industry.

The invention discloses an organic light emitting diode. The organic light emitting diode comprises an anode, a hole injection layer, an organic light emitting layer, an electron transport layer and acathode which are sequentially stacked; the work function of the hole injection layer is matched with the highest occupied molecular orbital energy level of the organic light emitting layer. The invention also discloses a pixel structure. The pixel structure comprises a red sub-pixel, a green sub-pixel and a blue sub-pixel arranged in sequence; each of the red sub-pixel, the green sub-pixel and the blue sub-pixel includes an anode, a hole injection layer, an organic light emitting layer, an electron transport layer and a cathode which are sequentially stacked; and in each of the red sub-pixel, the green sub-pixel and the blue sub-pixel, the work function of the hole injection layer is matched with the highest occupied molecular orbital energy level of the organic light emitting layer. According to the organic light emitting diode and the pixel structure of the invention, materials and printing processes are rationally selected during the manufacturing process of the organic light emitting diode and the pixel structure, and therefore, the work functions of the hole injection layers can be matched with the highest occupied molecular orbital energy level of the materials of the organic light emitting layers respectively, so that the organic light emitting diode and the pixel structure can realize excellent light emitting properties.

The present invention relates to a cage-like metal compound with strong fluorescence emission shown in a general formula (II) and a synthesis method thereof, wherein M is Ag, Cu or Au, Y is PF6 or BF4, and R is methyl or ethyl. The present invention develops a method for synthesizing a cage-like metal compound with high fluorescence emission through atom micro-control by using triazolium salts asstarting materials. Compared with the traditional method, the method of the invention has a series of advantages, such as mild reaction conditions, short reaction time, high yield, simple operation and strong fluorescence emission.

The invention provides a nanometer Sn ball preparing method. The method comprises the steps of 1, coating a substrate with a layer of rosin; 2, preparing a Sn film on the rosin to obtain a sample wafer, and conducting heat treatment on the sample wafer in a heat treatment device to enable the Sn film to become a plurality of nanometer Sn balls scattered on the rosin; 3, placing the sample wafer subjected to heat treatment in absolute ethyl alcohol, and melting the rosin by means of absolute ethyl alcohol to enable the nanometer Sn balls to be separated from the substrate; 4, cleaning the nanometer Sn balls with absolute ethyl alcohol. The prepared nanometer Sn balls have high luminescence property and can serve as quantum dots. Solid is taken as the raw material, the diameter of the nanometer Sn balls depends on the thickness of the Sn film, the adopted reagent is cheap and nontoxic, and therefore the preparing method has the advantages that operation is easy and safety performance is high.

The invention discloses a CuInSe2 ultra-small quantum dot as well as a preparation method and application thereof. The preparation method comprises the following steps: S1, preparing a trithiocyanuricacid or sulfydryl coordinated Cu and In ion precursor solution and a selenium precursor solution; preparing a CuInSe2 quantum dot precursor solution; preparing a micromolecular thiocyanate or sulfydryl coated ultra-small CuInSe2 quantum dot aqueous solution, preparing a target product in the aqueous solution by adopting an aqueous-phase one-pot method at a relatively simple process and a relatively low temperature, coating the obtained CuInSe2 quantum dot cubic-phase ultra-small nanocrystal with micromolecular thiocyanate or sulfydryl, and carrying out near-infrared luminescence. After the quantum dot ink is printed, a stable quantum dot light-emitting layer can be obtained, and the quantum dot ink has long service life and good light-emitting performance. When the quantum dot ink is usedfor printing and preparing a solar cell, the optical performance and the electrical performance of the cell can be effectively improved, and quantum dots have excellent photocatalytic performance.