7 results about "Deep blue" patented technology

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.

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 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 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.

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.

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.