15 results about "Deep blue" patented technology

The invention discloses a simple and low-cost preparation method of a dark blue organic light emitting diode material benzo [k] fluoranthene. The method comprises the following steps: by taking aryl halide as an initial raw material, activating the aryl halide and inorganic alkali under heating under the action of a catalytic system, carrying out DA reaction under the light irradiation under the synergistic catalysis of polycyclic aromatic hydrocarbon and a metal catalyst, and oxidizing by an oxidant to obtain the benzo [k] fluoranthene. Wherein the polycyclic aromatic hydrocarbon has an autocatalytic effect under illumination, and cooperates with metal halide as a reaction catalyst to activate carbon halogen bonds on halogenated aromatic hydrocarbon, so that the halogenated aromatic hydrocarbon and the polycyclic aromatic hydrocarbon are subjected to cycloaddition Diels-Alder reaction, and then aromatization is performed to obtain the target product benzo [k] fluoranthene. All raw materials involved in the synthetic route are cheap and easy to obtain, and expensive and dangerous chemical raw materials are avoided. The reaction is carried out under illumination, the condition is mild, compared with a traditional high-temperature reaction condition, the condition is better, and the green chemistry and sustainable development concepts are met.

This invention relates to the field of nanomaterials and photovoltaic devices, specifically a method for preparing ultrafine nickel oxide nanoparticles, comprising the following steps: weighing Ni(NO3)2·6H2O into a beaker, adding deionized water, preparing a nickel nitrate solution with a concentration of 3-5 mol / L, adding ammonia dropwise to the solution until the pH value of the solution is 9-10, obtaining a deep blue mixed solution; centrifuging the mixed solution with deionized water, repeating this process three times to obtain a uniform green colloidal precipitate; drying the colloidal precipitate in a freeze dryer for 6-24 hours, removing it, grinding it into powder, and calcining it in a muffle furnace to obtain black nickel oxide nanoparticles. The prepared ultrafine nickel oxide nanoparticles have small size and good solution dispersibility, and can be used to prepare flat and dense hole transport layer films, showing good application prospects in the field of perovskite solar cells.

The invention discloses a thermally activated delayed fluorescent material, a preparation method thereof and a luminescent device, and relates to the technical field of organic luminescent materials. The structural formula of the thermal activation delayed fluorescence material is shown in the specification, wherein R1 is H, tert-butyl or methyl, and R1 is located at any connectable position on a benzene ring; r < 2 >, R < 3 >, R < 4 > and R < 5 > are each independently H, tert-butyl or phenyl; a is an m-cyanophenyl group, a p-cyanophenyl group, a cyano group, or; representing a connection site; r6 is H or alkyl, R6 is located at any connectable position on a benzene ring, and M is O or N. The thermally activated delayed fluorescence material provided by the invention has relatively high fluorescence quantum yield and rapid reverse intersystem crossing rate, emits dark blue light, has the emission wavelength of 444-457 nm, is matched with a dark blue light MR material with a narrow-band emission characteristic, and has a wide application prospect. Therefore, the thermal activation delayed fluorescence material provided by the invention can be used as a sensitizer to realize preparation of a deep blue light super-fluorescence device.

This invention discloses a blue thermally activated delayed fluorescence (TADF) material, its preparation method, and its applications, belonging to the field of luminescent materials technology. Using a triazine unit as an electron acceptor and an organophosphorus-modified diphenyl acridine as an electron donor, a blue TADF luminescent material, TRz-POAc, was synthesized. Organophosphorus modification can effectively regulate the molecular twist angle, intermolecular interactions, and photophysical properties. The prepared TRz-POAc exhibits a molecular twist angle of 83.7°, with no significant π-π stacking between molecules, and a singlet-triplet bandgap (ΔEST) as low as 0.02 eV, enabling efficient reverse system crossing (RISC) processes. In doped devices, the maximum EQE reaches 22.26% with 20 wt% doping; in undoped devices, the maximum EQE is still as high as 21.00%, demonstrating excellent deep blue light emission performance and its application potential in undoped devices.

The application discloses a kind of blue light organic semiconductor materials of aromatic and sila polybasic ring and preparation method and application thereof.The structural formula of the blue light organic semiconductor material is as follows: wherein, Ar1, Ar2 are function control group, and Ar3 is H or function control group.The present application connects different modification groups on the 4th position of naphthalene ring and the 2,3 position of diphenylnaphthosila six-membered ring to control the luminescence physical property and energy level characteristic of derivative thereof.The prepared luminescent material has high-efficiency blue or deep blue emission under solid state, and has significant aggregation-induced emission performance;The energy level structure of the material has good regulation characteristics, so as to adjust the electron / hole injection performance of the material, which is beneficial to the simplification of device structure;All materials have good stability and film-forming property, can be dissolved in organic solvent to form film by spin coating or vacuum evaporation, and device preparation process is flexible.

The invention discloses a D-A type covalent organic framework material as well as a preparation method and application of the D-A type covalent organic framework material. The material is obtained through aldehyde amine condensation by using N, N ', N'-tetra (p-aminophenyl) p-phenylenediamine (TAPB) as a donor unit and 3, 6-bis (5-aldehyde thiophene-2-yl)-2, 5-bis (2-ethylhexyl) pyrrolo [3, 4-c] pyrrolo [3, 4-c] pyrrole-4 (2H, 5H)-diketone (DSZ) as an acceptor unit, and the material is of a two-dimensional layered porous structure, is dark blue and has reversible switching electrochromic performance from dark blue to nearly transparent color. According to the invention, a donor-receptor type covalent organic framework structure is constructed through TAPB and DSZ, and reversible color change from dark blue to nearly colorless in a near-infrared region is realized by using synergistic oxidation reduction of a D-A unit and charge transfer characteristics of a conjugated framework.

The present specification relates to a delayed fluorescence compound represented by chemical formula 1 and an organic light-emitting device comprising same, and achieves delayed fluorescence light sensitive hyperfluorescence properties by the use of a compound that exhibits deep blue properties and has a low singlet-triplet energy difference, and a fluorescence compound which, relative to conventional delayed fluorescence material, exhibits deep blue properties, has a narrow half-width, and has excellent color purity.

The present application relates to a kind of pyrene organic compounds, mixture, composition and organic electronic device.The pyrene organic compound has the structure shown in formula (I), has fluorescent emission with short wavelength of luminescence wavelength, shows deep blue fluorescent emission.The pyrene organic compound described in the present application is used as guest light-emitting material, in the light-emitting layer of organic electronic device, can effectively improve the luminous efficiency and lifetime of organic electronic device.

1. Name of the product in this design: Circuit board under guard (Chang'an Deep Blue S09). 2. Purpose of this design: To protect automotive wiring. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The invention provides an xZnGa2O4 / (1-x) CaGa4O7: 0.1% Mn gallate heterojunction fluorescent powder design and a preparation method thereof, and aims to prepare a long-afterglow luminescent material which is stable in structure and can be used for realizing dynamic multi-dimensional information anti-counterfeiting under multimode excitation. The afterglow and attenuation time of the material are partially enhanced, and the material has good light excitation performance and dynamic luminescence color conversion ability, and is simple in preparation process and low in cost. The xZnGa2O4 / (1-x) CaGa4O7: 0.1% Mn fluorescent powder shows luminous colors which dynamically evolve along with time along with the change of the proportion of matrix components under the excitation of 254nm ultraviolet, the luminous colors comprise the change from green to cyan blue and the change from orange to light blue, the other brightness shows dark blue and dynamic light blue-orange change, and the luminous colors show dynamic reversible change under the heating condition. And under the excitation of 296 nm ultraviolet light, the sample with the component x being equal to 0.2 shows orange afterglow which is obviously different from the photoluminescence color of the sample. Based on the excellent optical performance, the material can be further applied to multi-dimensional information anti-counterfeiting.

This application relates to the field of display technology, and more particularly to a boron nitride compound and its applications. The boron nitride compound provided in this application can produce deep blue light emission, and its binuclear structure has carbon, nitrogen, and oxygen atoms arranged alternately on the same plane, which helps to improve exciton utilization and increase luminous brightness.

A wig base is provided including a skin side layer of natural fiber, an outer layer of synthetic fiber for maintaining the shape, and adhesive for bonding the skin side layer and the outer layer together. The outer layer may be transparent fabric. The skin side layer may also be transparent fabric and the outer layer may have higher transparency than the skin side layer. The adhesive may not permeate into the skin side surface of the skin side layer. The skin side layer may be colored deep blue and pale red in comparison to the outer layer. A wig may be provided whose wig base is molded into a head shape and has hairs attached thereto. A manufacturing method for a wig base may be provided including a step of molding the wig base with a mold resembling a head through heating.

1. Name of this design product: Fuel tank lower guard plate (Chang'an Deep Blue S09). 2. Purpose of this design: To protect the fuel tank of a car. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The application discloses a Eu(II) based halide nanocrystal dispersion glass, and a chemical composition thereof includes, in terms of molar percentage of oxide or halide: SiO2 40-65%, Al2O3+1 / 2AlF3 5-25%, MO+MX2 10-23%, A2O+1 / 2AX 3-15%, Eu2O3+1 / 2EuX3 0.05-7%; wherein, M is an alkaline earth metal element, A is an alkali metal element, and X is a halogen. The application can prepare alkali metal halide and CsEuX3 nanocrystals, realizes controllable precipitation of different crystal phase halide nanocrystals, promotes realization of high-efficiency adjustable light emission in a deep blue light to cyan light range, simultaneously obtains high color purity and high-efficiency light emission, and can have good thermal stability, water resistance and light stability, and has potential application prospects in the fields of solid-state lighting, display backlight sources and X-ray detection and imaging.

This invention belongs to the technical field of organic electroluminescent devices, and relates to an organic electroluminescent device based on a doublet-state sensitized fluorescence mechanism and its fabrication method. It includes a light-emitting layer; the light-emitting layer is made of a first organic compound, a second organic compound, and a third organic compound; the first organic compound has a first triplet state... T The energy level of the first organic compound must be higher than the first doublet state of the second organic compound. D 1. Energy level; the second organic compound is an organic compound with doublet luminescence properties, and the second organic compound's... D The energy level 1 is greater than the first singlet state of the third organic compound. S The first energy level; the third organic compound is a traditional fluorescent material, phosphorescent material, or a thermally activated delayed fluorescence material with multiple resonances. This invention realizes high-efficiency and low-roll-off high-color-purity light-emitting devices (especially deep blue light devices) and single-emitting-layer white light devices with excellent color coordinate stability.