39results about How to "High purity of luminous color" patented technology

The invention discloses a backlight module of a display device and a white light LED. The backlight module comprises a lamp bar and a light guide plate, wherein the lamp bar is provided with a plurality of ultraviolet light LEDs, and the light-entering face of the light guide plate and the ultraviolet light LEDs are arranged oppositely. A path of the process from light emitted by the ultraviolet light LEDs to the light shot from the light-exiting face of the light guide plate at least comprises an RGB quantum dot fluorescent powder layer. The RGB quantum dot fluorescent powder layer comprises a red light quantum dot fluorescent screen, a green light quantum dot fluorescent screen and a blue light quantum dot fluorescent screen, wherein the red light quantum dot fluorescent screen, the green light quantum dot fluorescent screen and the blue light quantum dot fluorescent screen are sequentially arranged. The RGB quantum dot fluorescent powder layer generates high-purity white light under excitation of ultraviolet light emitted by the ultraviolet light LEDs. As the RGB quantum dot fluorescent powder layer is formed by sequentially arranging the red light quantum dot fluorescent screen, the green light quantum dot fluorescent screen and the blue light quantum dot fluorescent screen, color saturation of the backlight module is improved, and the problem of reabsorption of RGB quantum dot fluorescent powder is solved.

The invention relates to a synthesizing method of inorganic perovskite nanosheets. The method includes: adding the precursor solution of cesium into the precursor solution of lead halide, performing ultrasonic treatment for 10-30 minutes to obtain a mixed solution, transferring the mixed solution into a reaction kettle, performing reaction under 60-150 DEG C for 30-420 minutes, and naturally cooling to obtain reactants; performing centrifugal processing and washing to obtain the inorganic perovskite CsPbX3 nanosheets. The method has the advantages that the method is simple to operate and does not need harsh experiment conditions, and the prepared nanosheets are uniform in size, high in controllability and high in yield, and the quantum efficiency of the nanosheets reaches up to 48%.

The invention discloses a blue, yellow and orange light calcium titanium mining quantum dot and a molecular sieve composite luminescent material and a preparing method and application thereof, and belongs to the field of luminescent materials. The method comprises the steps of 1, adding a molecular sieve into a cesium halide solution to stir to obtain a molecular sieve of Cs+ exchange; 2, adopting octadecene, oleic acid, oleylamine and lead halide as raw materials, heating and stirring the mixture at N2 atmosphere, and adjusting the molar ratio of different halogens in lead halide to obtain a lead halide solution; 3, mixing the molecular sieve of Cs+ exchange and octadecene, heating and stirring the mixture at N2 atmosphere, and injecting the mixture into the lead halide solution to react to obtain the composite luminescent material. The molecular sieve composite luminescent material is good in luminous efficiency and high in color purity and has narrow emission peaks at 465 nm (blue), 570 nm (yellow) and 590 nm (orange), the emission peaks is adjustable in the range according to halogen elements, meanwhile the fluorescent lifetime is obviously prolonged, and the composite luminescent material is stable in a solid state and can be applied to the fields of white light LED and the like.

The invention provides a quantum dot electroluminescent device, a preparation method of the quantum dot electroluminescent device and application of the quantum dot electroluminescent device. The quantum dot electroluminescent device includes an electron injection layer (an cathode), an electron transmission layer, a quantum dot light-emitting layer, a hole transmission layer, an anode auxiliary layer, and a hole injection layer (an anode). The quantum dot electroluminescent device of the invention is advantageous in relatively simple preparation process, high-purity illuminant color and omission of light filters; the emitting color of the quantum dot electroluminescent device can be adjusted through the size of quantum dots; the quantum dot electroluminescent device can be made into a flexible device; and the quantum dot electroluminescent device can be applied to a night vision imaging system.

The invention discloses a heterocyclic compound with xanthone as a core and a preparation method and applications thereof, and belongs to the technical field of semiconductors. The structure of the compound provided by the invention is represented by a general formula (I) shown in the description. The invention also discloses the preparation method and the applications of the compound. The compound of the invention has high glass transition temperature and molecular thermal stability and has a suitable HOMO and LUMO energy leves, has a singlet-triplet energy level difference ([delta]Est), andcan be used as a doping material of a light emitting layer of an organic electroluminescent device, thereby improving the luminous efficiency and service life of the device.

The invention belongs to the technical field of OLED, and provides a compound with a structure shown in a formula (1), wherein D represents an electron donating group containing a nitrogen atom and isconnected to a benzene ring through the nitrogen atom, and A represents an electron accepting group containing a boron atom and is connected to the benzene ring through the boron atom; m and n are respectively selected from 1, 2 and 3; and R11, R12, R13 and R14 are respectively and independently selected from a hydrogen atom, an alkyl group, an alkoxy group, a cyano group, a trifluoromethyl group, the electron accepting group A' or the electron donating group D' containing the nitrogen atom. The compound adopts biphenyl as a connecting unit between the electron donating group D and the electron receiving group A, the D and the A achieve effective separation of HOMO and LUMO at different positions of molecules, and two physical processes of intramolecular charge transfer and space charge transfer can be simultaneously formed in the same molecule through connection of the biphenyl between the D and the A units, so that absorption of the molecules to light is improved, and the oscillatorstrength of the molecules is improved.

The invention provides a preparation method of a particle size-controllable quantum dot display material. The preparation method comprises the following steps: by taking aerogel as a reaction carrier, modifying the aerogel with amino propyl trimethoxysilane, adding soluble metal ion salt, and adsorbing metal ions into pores of the aerogel under the complexing action of NH<4+>, thereby forming a metal ion precursor mixing solution; putting the metal ion precursor mixing solution into a high-pressure reaction kettle, injecting nonmetal ion source mixing solution into the reaction kettle at high temperature and high pressure, performing solvothermal reaction at certain temperature and pressure, and finally performing centrifugal settling, cleaning and drying, thereby obtaining quantum dot materials assembled in the pores of the aerogel. Synthesis of quantum dots is performed in the pores of the aerogel; the particle size of the quantum dots mainly depends on the size and uniformity of aerogel control, but other factors have little influence on the particle size of the quantum dots; the preparation method is easy and quick to operate, feasible, high in efficiency and environment-friendly, and is suitable for large-scale production.

The invention belongs to the technical field of luminescent materials, and particularly relates to a perovskite composite luminescent material and a preparation method, a prepared product and application thereof. Wherein the perovskite composite luminescent material comprises perovskite nanocrystals and metal halides, the metal halides are carriers of the perovskite nanocrystals, the perovskite nanocrystals are embedded in the metal halides, and the molar ratio of the perovskite nanocrystals to the metal halides is 1: 0.1-100. The preparation method of the perovskite composite luminescent material comprises the following steps: carrying out solid-phase mixing on a perovskite precursor and a metal halide according to a molar ratio of 1: (0.1-100); and melting the solid-phase mixture at 650-1000 DEG C for 10-60 minutes, cooling to crystallize, and grinding until the particle size is less than 80 mu m, thereby obtaining the perovskite composite luminescent material. Different from the prior art, the method provided by the invention has the characteristics of simple synthesis process, low cost, no solvent and the like, and the prepared luminescent material has high luminescent intensity and high luminescent color purity, and can be widely applied to photoluminescent devices, lasers and nonlinear optical devices.

The invention discloses a preparation method of CsPbBr3 spindle type perovskite micro-particles with an adjustable size. The preparation method comprises the following steps: firstly, by taking 5-hexynoic acid and 10-undecynoic acid as surface ligands, respectively preparing a 5-hexynoic acid CsPbBr3 perovskite nanocrystal solution and a 10-undecynoic acid CsPbBr3 perovskite nanocrystal solution;respectively mixing the 5-hexynoic acid CsPbBr3 perovskite nanocrystal solution and the 10-undecynoic acid CsPbBr3 perovskite nanocrystal solution according to different volume ratios to obtain mixedsolutions; and finally, reacting the mixed solutions under the irradiation of an ultraviolet lamp to obtain the CsPbBr3 spindle type perovskite micro-particles with different length-width ratios. Thepreparation method is simple, the CsPbBr3 spindle type perovskite micro-particles with higher luminous purity and adjustable luminous life can be prepared at one time; the spindle type perovskite CsPbBr3 micro-particles prepared by the method disclosed by the invention are adjustable in length-width ratio, smaller in band gap, narrow in light-emitting half-peak width, high in color purity, long inlight-emitting service life and excellent in photoelectric property.

The invention is suitable for the technical field of optical materials, and provides a perovskite nanowire and a preparation method and application thereof.The preparation method of the perovskite nanowire comprises the following steps: making octadecene, oleic acid and a cesium source heated and dissolved to obtain a precursor solution; mixing lead chloride, oleic acid, rare earth acetate, octadecene, caprylic acid, octylamine and oleylamine to obtain a transparent solution; and injecting the precursor solution into the transparent solution, performing low-temperature cooling, and dispersing the precursor solution into a non-polar solvent to obtain the perovskite nanowire. The preparation method provided by the embodiment of the invention is simple in operation, less in time consumption and low in energy consumption, and the prepared blue-violet light CsPbCl3 perovskite nanowire is stable in sample phase, uniform in morphology and size, narrow in half-peak width, high in luminous color purity, few in surface defect and high in quantum efficiency.

The present invention belongs to the technical field of OLEDs, and provides a boron heterocyclic compound, which has a structure represented by a chemical formula I, wherein X1 and X2 are respectivelyand independently selected from a single bond,-(R<1>)C(R<2>)2, -NR<2>, BR<3>, an O atom and an S atom, R<1>, R<2> and R<3> are mainly and independently selected from any one of aryl, heteroaryl, fused aryl and fused heteroaryl, D1 and D2 are respectively and independently selected from a hydrogen atom, a C12-C40 carbazole group and a derivative group thereof, a C12-C40 diphenylamino group and a derivative group thereof, and C13-C40 acridinyl and a derivative group thereof, and D1 and D2 are respectively connected to the benzene ring with a structure represented by the chemical formula I, andare not hydrogen atoms at the same time. According to the invention, the boron heterocyclic compound contains a donor-acceptor structure, has appropriate HOMO and LUMO values and small [delta]Est, andcan bring high brightness, low voltage, high efficiency and long service life. The invention further provides a display panel and a display device.

The invention belongs to the field of luminescent materials, and discloses a perovskite quantum dot and low-dimensional oxide composite luminescent material, preparation method and an application thereof. The method includes adding a bulk layered perovskite material into an acidic solution to protonate; then adding an organic amine or ammonium solution to strip the protonated layered material; mixing stripped low-dimensional oxide nano sheets with octadecene; raising the temperature to 130-170 DEG C under inert atmosphere; and then injecting a lead halide solution and stirring for reaction, cooling, centrifugally washing and drying to obtain the perovskite quantum dot and low-dimensional oxide composite luminescent material. The composite material has good luminous efficiency and high color purity, has narrow emission peaks at 460nm (blue), 519nm (green) and 658nm (red), and the emission peaks can be adjusted within this range according to halogen components, meanwhile, the fluorescence lifetime is remarkably improved, the composite material is relatively stable in the presence of solid state, and can be used in the fields of white light LED and the like.

The invention discloses a gasochromic rare earth complex. The structure of the gasochromic rare earth complex is obtained by the coordination of rare earth metal Eu (III) and a tripod type ligand MeNTB. The invention also discloses a preparation method of the above complex, comprising: carrying out coordination on rare earth salt and MeNTB ligand at the molar ratio of 1:2 to obtain the gasochromic rare earth complex. The gasochromic phenomenon obtained by the complex of the invention has high signal strength, speed, stability and repeatability; moreover, the response strength, response range and response time can be further improved by decorating the ligand and selecting metal; in addition, the complex can be used for designing gasochromic switches and logic gate devices and has wide application prospect.

The present invention relates to an ionic phosphorescent metal complex, and a preparation method and application thereof. The structure of the complex is represented by a general formula (I) as shownin the specification. In the formula (I), R1 and R2 are the same or different, and are independently selected from alkyl, aryl and heteroaryl groups; the alkyl, aryl and heteroaryl groups are optionally substituted by the group consisting of halogen, an alkyl group, an alkoxy group, an alkylthio group, an amino group, an alkylamino group, a dialkylamino group, an arylamino group, a diarylamino group, a halogenated alkyl group, a cyano group, a nitro group, an alkenyl group, an aryl group and a heteroaryl group optionally substituted by 1 to 3 aryl groups; R3 is one optionally selected from thegroup consisting of halogen, an alkyl group, a haloalkyl group, an alkoxy group, an alkylthio group, an amino group, an alkylamino group, a dialkylamino group, a cyano group, a nitro group, an alkenyl group and the like; and M is optionally selected from Cu (I), Ag (I) and Au (I). The invention further relates to an organic light-emitting diode and a preparation method and application thereof. The organic light-emitting diode prepared by taking the phosphorescent metal complex as a light-emitting layer dopant has high-performance organic electroluminescence and can be applied to illuminationand panel display.

The invention discloses a preparation method of a quantum dot patterned film. The preparation method at least comprises the following steps: (1) obtaining a film forming solution S1; (2) obtaining a solution S2 for patterning; (3) obtaining a film prepared from the film forming solution S1 on a substrate; (4) transferring the solution S2 to the pixel sites of the film in the step (3) to obtain thequantum dot patterned film, wherein the solution S2 contains a patterned solute, the patterned solute comprising at least one of quantum dots and a perovskite quantum dot precursor. The method is easy and convenient to operate, low in cost and suitable for industrial production, large-area quantum dot patterning can be achieved, and the patterned film prepared through the method can effectively isolate water and oxygen, is resistant to chemical corrosion and has high stability.

The present invention relates to a compound, a luminescent material, an organic light-emitting display panel and an organic light-emitting display device. The compound has a structure shown in Chemical Formula I; the luminescent material includes any one or at least two combinations of the compounds, The organic light-emitting display panel includes an anode, a cathode, and an organic layer located between the anode and the cathode; the material of the organic layer includes any one or a combination of at least two of the compounds; the The organic light emitting display device includes the organic light emitting display panel. ΔE of the compounds provided by the invention _st ≤0.30eV, when used in an organic light-emitting display panel, it can further improve the luminous efficiency of the device.

The invention discloses an organic light-emitting device and a display device. The organic light-emitting device comprises an electron transmission layer, an electron injection layer and a quantum dotlayer, wherein the quantum dot layer is arranged between the electron transmission layer and the electron injection layer. According to the organic light-emitting device and the display device, the quantum dot layer is added between the electron injection layer and the electron transmission layer, so that the quantum dots in the quantum dot layer emit a narrower spectrum, a phenomenon of shoulderpeak enhancement caused by a micro-cavity effect by the light-emitting spectrum with extremely narrow quantum dot is avoided, and the purity of the light-emitting color is improved.

The invention discloses a method for preparing a benzogermanole compound through naphthyl lithium induced intramolecular cyclization reaction, a product and application. The method mainly comprises the following steps of: reacting lithium naphthyl with (o-germanium phenyl) acetylene in tetrahydrofuran or diethyl ether at the temperature of between-78 and 0 DEG C for 5 to 30 minutes to generate a lithiated benzogermanle intermediate; and further carrying out Negishi coupling reaction with an electrophilic reagent, and separating by a chromatographic column to obtain a series of functional germanium-containing conjugated molecules containing the benzogermanle structure. Through selection of aryl substituent groups, the light-emitting wavelength of the benzogermanole compound is regulated and controlled, and high-purity and high-quantum-yield blue light emission is realized. The method is simple, efficient, wide in substrate range and easy to functionalize. The method has the advantages of mild reaction conditions, simple operation, atom economy and easy industrialization.