3results about How to "High Luminous Quantum Efficiency" patented technology

The application discloses a kind of multispectral nanocluster doped multiple coating light concentrator and its method, including preparation substrate layer, preparation light emitting layer and preparation anti-reflection function layer, multispectral nanocluster doped light emitting layer is coated on substrate layer, anti-reflection function layer is coated on light emitting layer, the multispectral nanocluster is using Eu 3+ 、Tb 3+ 、Ce 3+ Ion or any combination thereof induced nanocluster of agglomerated polymer formation, the light emitting layer is obtained using multispectral nanocluster doped resin, for the absorption of incident short-wave light and conversion into characteristic emission light;The anti-reflection function layer is coupled to the outermost layer of light emitting coating, for limiting the light quantum conduction in coating, using different refractive index coating to limit the light quantum conduction in coating, to lock the fluorescent light quantum escape emitted by inner layer light emitting material, while, also can play the role of reducing interface reflection loss and improving the injection efficiency of incident light to light emitting layer.

This invention discloses a method for preparing polycrystalline fluoride composites through template-based slow-release in-situ molding, belonging to the field of inorganic luminescent functional materials technology. The method includes: providing raw materials, including at least one bulk material as a template, with the raw materials collectively providing A, B, and M ions; mixing the raw materials in a solvent and maintaining the reaction temperature for a specified time, allowing the template to slowly dissolve and release ions; the ions provided by the raw materials react with fluoride ions provided by the solvent and / or the raw materials to grow fluoride crystals in situ on the template surface, with the crystals interpenetrating and fusing to form a polycrystalline composite; after the reaction, the product is obtained by washing and drying. This invention eliminates the need for tableting, high-temperature sintering, and organic binders, and can generate polycrystalline fluorescent fluoride composites of predetermined sizes in a single self-stacking process, avoiding the defects of powder breakage and high-temperature degradation of luminescent ions in traditional two-step methods. It features high luminescence quantum efficiency, a simple process, and ease of industrial production.

The application relates to the technical field of detection, in particular to a lead halide perovskite quantum dot material and a preparation method and application thereof. The method comprises the following steps: mixing a lead source, 1-octadecene, oleylamine, oleic acid and a cesium source, and then carrying out ultrasonic treatment to obtain a mixed solution; placing the mixed solution in a tip ultrasonic instrument, first activating at low power, then improving the power to carry out ultrasonic synthesis reaction, washing the obtained product with a first organic solvent, dispersing the product in a second organic solvent, adding a surfactant, again carrying out ultrasonic treatment and tip ultrasonic activation, and finally preparing the lead halide perovskite quantum dot material. The lead halide perovskite quantum dot CsPbX3 (X is Cl, Br or I) material obtained by the method has excellent quantum dot luminescence performance, good stability in a reverse microemulsion system, can introduce a to-be-detected substance, and realizes quantitative analysis through fluorescence or chroma testing.