51 results about "Green yellow" patented technology

The invention discloses a low-cost train operation control simulation system based on digital twinning and an SSA-DBO algorithm. The system is composed of hardware, software and a digital twinborn body. Firstly, a single chip microcomputer, a wireless communication module, a common cathode nixie tube, a yellow-green LED lamp, a motor driving module and the like are designed as hardware, and the modules form a physical entity; secondly, according to software design, input signals of a track circuit are monitored, and corresponding logic judgment and processing are carried out according to received information; and finally, the digital twin designs a virtual model based on a physical system, the virtual model comprises a train, a track, a sensor and other components, various state information of the physical system is collected in real time through a track circuit, the train sensor and the like of the solid model, the state information is uploaded to a server by utilizing the Internet of Things technology, and after data screening is carried out through an SSA-DBO algorithm, the state information of the physical system is obtained. The data and the model together drive the digital twin for monitoring, analysis, optimization, prediction and visualization.

This invention discloses a method for controlling photon spin-orbit coupling in an organic alloy microcavity, belonging to the field of optical microcavity technology. This invention prepares β-type Pe by doping different amounts of DCA into Pe using a volatilization method. 1‑x DCA x An organic alloy, wherein x ≤ 20 wt%, allows for the controllability of crystal color from yellow-green to orange-red. Furthermore, this organic alloy exhibits birefringence, and its application in the fabrication of optical microcavities allows for the observation of TE-TM spin-orbit coupling and Rashba-Dresselhaus spin-orbit coupling within the microcavities. This provides a novel type of microcavity for studying the interaction between light and matter in organic alloy microcavities, and the controllability of photon spin-orbit coupling within these microcavities can be achieved by adjusting the value of x.

The invention belongs to the technical field of fluorescent polymer materials, and particularly discloses bifuran polyamide with high quantum yield and capable of emitting yellow-green wavelength light as well as a preparation method and application of the bifuran polyamide. The method comprises the following steps: dissolving a bifuranoyl chloride monomer in an organic solvent to obtain an organic phase; adding an alkaline aqueous solution into the organic phase to form a phase interface, then adding a diamine monomer, and stirring to carry out an interfacial polymerization reaction; and after the reaction is finished, filtering, precipitating, washing and drying to obtain the bifuran polyamide. The bifuran polyamide is prepared by regulating and controlling the main chain structure and chain rigidity and flexibility of the polymer through a diamine monomer with a specific molecular structure, the emission wavelength of the amorphous bifuran polyamide can reach 540-552 nm under exciting light of 480 nm, red shift is performed to 565-568 nm after crystallization, long-wavelength yellow-green light emission, high-quantum-yield light emission and good biocompatibility are achieved, and the bifuran polyamide can be applied to the field of organic light emitting devices, such as organic light emitting devices, organic light emitting devices, organic light emitting devices, organic light emitting devices, organic light emitting devices, organic light emitting devices, organic light emitting devices and the like. The application of the bio-based polyamide in the field of biological imaging is expanded.

The utility model provides a light source device and a lamp. A containing groove is formed in a support of the light source device. The first blue light chip is arranged on the groove bottom of the accommodating groove, and the first blue light chip is used for emitting blue light of which the peak wavelength is a; the second blue light chip is arranged on the groove bottom of the containing groove, the second blue light chip and the first blue light chip are arranged in a spaced mode, the second blue light chip is used for emitting blue light with the peak wavelength being b, and b is larger than a; the first fluorescent structure covers the first blue light chip; the second fluorescent structure covers the second blue light chip and the first fluorescent structure, and the second fluorescent structure comprises yellow-green fluorescent powder; according to the invention, a regional excitation structure can be formed, light of different colors can be excited in a targeted manner to complement spectrum deficiency, and the overall color rendering index can be improved; meanwhile, mutual absorption loss between different fluorescent structures is reduced through dual-wavelength hierarchical excitation and physical isolation of the fluorescent structures, and optimization of light extraction efficiency is facilitated.

The application discloses an aggregation-induced emission metal organic framework, a preparation method thereof and fluorescent / colorimetric dual-mode intelligent detection for trace HCl. 2+ The aggregation-induced emission metal organic framework is prepared by providing Zn(NO3)3.6H2O as Zn 2+ , imidazole-2-formaldehyde and an AIE molecule HDBB as organic ligands, and through a solvothermal method to obtain ZIF-90-HDBB, which can change the aggregation state fluorescence from yellow green to orange red after being contacted with HCl gas; the ZIF-90-HDBB is uniformly loaded on cellulose filter paper to obtain a paper-based sensor for portable detection of HCl, and through combination with a color recognition APP of a smart phone, the HCl can be rapidly and sensitively detected on site in a fluorescent / colorimetric dual mode. Since the HDBB molecule is prone to protonation under acidic conditions, the fluorescence color changes, and therefore the material can be accurately and efficiently used for detection of acidic gas, and the material can be recycled.

The present invention relates to a spectral dimming package structure, characterized in that: it includes at least one first CSP chip, the first CSP chip includes a violet chip, and a first encapsulation layer coated on the outer surface of the violet chip; at least one second CSP chip, the second CSP chip includes a blue chip, and a second encapsulation layer coated on the outer surface of the blue chip; and an outer encapsulation layer for encapsulating the first and second CSP chips; a number of blue phosphor particles disposed at least in the first encapsulation layer and not within the second encapsulation layer; a number of yellow-green phosphor particles disposed only within the second encapsulation layer; and a number of red phosphor particles disposed in the outer encapsulation layer and / or at least one of the second encapsulation layers. The spectral dimming package structure of the present invention has higher luminous efficiency and spectral integrity.

The present invention discloses a single-component white light coordination polymer, the chemical formula of which is [Zn(bpdo)(fum)(H2O)2] n , where bpdo represents 4,4′-bipyridine-N,N′-dioxide, and fum represents fumaric acid; the structural unit of the single-component white light coordination polymer is a triclinic system with a space group of P1 and unit cell parameters of #imgabs0#α=87.312(7)°, β=82.988(8)°, and γ=73.760(8)°. The present invention synthesizes a single-component white light coordination polymer crystalline material in a one-step solvent thermal reaction; the material can emit white light within an excitation wavelength range of 320-370nm and gradually changes from pink to yellow-green within 5 minutes under irradiation with a 200W xenon lamp; the material has the dual functions of emitting white light with a high color rendering index and photochromism.

To provide a vacuum cleaner provided with a suction port body for reducing the feeling of incompatibility of light emitted to a surface to be cleaned and improving the visibility of dust on the surface to be cleaned.SOLUTION: The suction port body 20 of the vacuum cleaner 1 includes an irradiation part 202 for irradiating a surface to be cleaned with light. The illumination unit 202 includes a toning LED (LED221) that emits light adjusted to include wavelengths of green and white, and the toning LED is adjusted by mixing a blue LED with a yellow-green phosphor and a yellow phosphor.SELECTED DRAWING: Figure 10

The invention relates to the technical field of marking adhesives, in particular to an aircraft high-temperature-resistant torque marking adhesive and a preparation method and application thereof.The aircraft high-temperature-resistant torque marking adhesive is prepared from, by mass, 50%-60% of Dynasyl SIVO 140, 1%-2% of magnesium lithium silicate, 2%-3% of hydrophilic vapor-phase silicon dioxide, 35%-41% of filler, 1%-2% of mildew preventive and 1%-2% of europium-doped silicate fluorescent powder. The water-based inorganic sol-gel resin DynasylanSIVO 140 based on a silane technology is used as an adhesive, can resist the high temperature of 1000 DEG C, does not crack, and can be cured at room temperature; meanwhile, europium-doped silicate fluorescent powder is added into the components of the marking glue, so that yellow-green fluorescence can be displayed under the irradiation of 365nm ultraviolet light, the visibility of tiny cracks is improved, and the detection sensitivity is improved; in addition, the airplane high-temperature-resistant torque marking adhesive is prepared according to the mass percent, can meet the technical index of the enterprise standard BMS8-45 of the Boeing company, and has high efficiency and reliability.

The application discloses a cellulose-based pH / HClO dual-response fluorescent probe, and steps of a preparation method thereof are as follows: a deep red solid product compound 1 is synthesized; a light yellow-green compound 2 is synthesized; and modified cellulose is obtained by modifying cellulose. After the modified cellulose is completely dissolved in DMSO, the compound 1 and the compound 2 are added, stirring is carried out at 100 DEG C for 6 hours, freeze-drying is carried out, washing with ethanol is carried out until the product is colorless, and after drying, a red-brown fluorescent probe is obtained. The application takes natural polymer cellulose as a substrate, grafts a fluorescent probe, realizes pH and HClO dual-response, and has good application potential in multitasking processing.

The embodiment of the utility model discloses a light source module, a lamp and a lighting system, and relates to the technical field of electronics. The light source module comprises a first light emitting unit used for emitting controlled first color temperature white light; the second light emitting unit is used for emitting controlled second color temperature white light; the third light emitting unit is used for emitting controlled first color light; and the fourth light emitting unit is used for emitting controlled second color light, the first color temperature white light, the second color temperature white light, the first color light and the second color light are used for light mixing to obtain target color temperature white light, the first color light is long-wave red light, and the second color light is yellow-green light. According to the light source module, the lamp and the lighting system, the color band range of the target color temperature white light can be expanded, meanwhile, the color deviation of the target color temperature white light is reduced, and the overall light quality is improved.

The application discloses a kind of divalent lanthanide series metal marked yellow-green fluorescent plastic microspheres and its preparation method and application, it is related to high molecular polymer preparation technical field.The preparation method of plastic microspheres of the application is as follows: under argon atmosphere, prepare nitrogen heterocyclic ligand N8;Under nitrogen atmosphere, drop the mixed solution of nitrogen heterocyclic ligand N8 and methanol into the mixed solution of EuBr2 and methanol to prepare Eu-N8 by reaction;Eu-N8 is dissolved in solvent containing polyvinylpyrrolidone, first embedding treatment is carried out by hydrothermal method, and PVP@Eu-N8 is obtained;PVP@Eu-N8 is added in the process of synthesizing polystyrene micro-nano plastic to carry out second hydrothermal coating treatment, and the plastic microspheres are obtained.The plastic microspheres prepared by the method of the application have uniform and consistent particle size, high-brightness yellow-green fluorescence, high stability, and can be directly added to various environmental samples to realize fluorescent tracing and quantitative detection of microplastics.

The invention relates to the technical field of environment-friendly high polymer materials and functional coatings, and discloses yellow-green fluorescent water-borne epoxy resin for photovoltaic aluminum profiles and a preparation method of the yellow-green fluorescent water-borne epoxy resin. The method comprises the following steps: S1, synthesizing fluorescent dihydric alcohol (NTDI-Diol), S2, synthesizing a fluorescent dicarboxylic acid chain extender (CA-Fluo), S3, taking the CA-Fluo as a chain extender, carrying out ring-opening addition reaction with epoxy resin, and carrying out composite hydrophilic modification and phase inversion emulsification, so as to prepare the waterborne epoxy resin with low-temperature rapid curing, high flexibility and intrinsic fluorescence function. According to the invention, the synergism of technical characteristics and effects is realized through molecular structure design, and the coating can be hard-dried at 5 DEG C for 36 hours, has fluorescence performance and excellent salt fog resistance, is suitable for high-end industrial coating of photovoltaic aluminum profiles and the like, and has a good application prospect.

The invention belongs to the field of phosphorescent materials, and provides a long-life room-temperature phosphorescent material based on natural polysaccharide and a preparation method thereof. The preparation method of the long-life room-temperature phosphorescent material comprises the following steps: uniformly grinding boric acid, urea and natural polysaccharide molecules, placing the obtained solid mixture in a beaker for heating treatment, naturally cooling to room temperature after the reaction is completed, and grinding to obtain the long-life room-temperature phosphorescent material. After the long-life room-temperature phosphorescent material powder disclosed by the invention is excited and removed by ultraviolet light, cyan, green or yellow green afterglow can be obtained according to different added polysaccharides, the average decay life of the room-temperature phosphorescent material can reach 582.86-1046.28 ms under room-temperature and air conditions, the afterglow luminescence time visible to naked eyes can reach 5-11s, and the afterglow luminescence time can reach 582.86-1046.28 ms under room-temperature and air conditions. And the preparation and post-treatment processes are convenient, and the raw materials are low in cost and environment-friendly. The obtained long-life room-temperature phosphorescent material has important application in the fields of information encryption, multi-color display and the like.

The present invention relates to the technical field of LEDs. The present invention discloses an LED light source with a high color rendering index. By adding a compound capable of absorbing yellow-green visible light to the light-emitting formulation and matching the white light emitted by a blue light chip, the color rendering index of the LED lamp is improved. The compound for absorbing yellow-green visible light is preferably cobalt phosphate or lithium cobalt phosphate. By adding a relatively small mass ratio of cobalt phosphate or lithium cobalt phosphate, the effect of improving the color rendering index of the LED lamp can be achieved. The formulation is simple, and the materials are simple and easily available, solving the problems in the prior art that the formulation is complicated and the cost is relatively high due to the need to increase the types of phosphors or use long-wave nitrogen oxide red phosphors to improve the color rendering index.

The application belongs to the technical field of nonlinear optical crystal and semiconductor functional crystal material, and relates to a growth method of lithium-rich yellow-green LiInSe2 single crystal and application thereof. The method comprises the following steps: S1, placing non-equimolar yellow-green LiInSe2 polycrystalline material in a pBN crucible with a seed crystal section, and then placing the pBN crucible in a quartz crucible, sealing the quartz crucible after vacuumizing to form a sealed double-crucible system; S2, completely melting the yellow-green LiInSe2 polycrystalline material by low-temperature overheating in a rotating state; S3, lowering the sealed double-crucible system from a high-temperature zone and passing through a temperature gradient zone to enter a low-temperature zone in a rotating state, and then pulling back the whole to re-enter the high-temperature zone after cooling; repeating the lowering-pulling back multiple times to complete the cycle of melting-recrystallization; and S4, cooling to room temperature to obtain the lithium-rich yellow-green LiInSe2 single crystal. The lithium-rich yellow-green LiInSe2 single crystal prepared by the method has significant advantages in single crystal rate, process robustness, crystallization quality and detection performance.

The present application relates to a kind of yellow-green light-emitting single crystal material and its preparation method and yellow-green light-emitting device.The preparation method includes mixing soluble alkali metal iodide and soluble luminescent center ion halide, dissolving the mixture in acid solution at first dissolution temperature, to obtain reactant solution;Reactant solution is cooled from first dissolution temperature to first end crystallization temperature according to first cooling rate, to obtain first crystal grain;First crystal grain is placed in reactant solution at second dissolution temperature, and is cooled to second end crystallization temperature according to second cooling rate, to obtain the yellow-green light-emitting single crystal material.The yellow-green light-emitting single crystal material prepared by the present application can have a quantum yield of up to 98.98% in the yellow-green waveband, and the preparation method is simple, and the production cycle is short.

The invention discloses a method for detecting the content of ferrous iron impurities in a lithium supplementing material and application of the method, and belongs to the technical field of lithium ion battery pre-lithiation. According to the technical scheme, the method comprises a lithium ferrite pretreatment step and a potassium permanganate titration step, the lithium ferrite pretreatment step comprises the following steps: adding lithium ferrite into concentrated hydrochloric acid for dissolving, carrying out suction filtration after dissolving to obtain a clear yellow green liquid, and then diluting to obtain a to-be-titrated liquid. The invention provides the method for detecting the content of the ferrous iron impurity in the lithium supplementing material, the detection method is simple and rapid to operate, has an important promotion effect on the detection of the purity of lithium ferrite, can also be used for analyzing and guiding the modification of the lithium ferrite material, and has important significance on improving the performance of the material.

The application belongs to the technical field of carbon dot superlattice preparation, and particularly relates to a structural color carbon dot superlattice and a preparation method and application thereof. The carbon dot superlattice with structural color is synthesized by using o-phenylenediamine as the only carbon source and nitrogen source through a simple and green hydrothermal method. Five kinds of structural color carbon dot superlattices are prepared by changing the oxidant, sodium sulfate and cooling speed, and the colors are powder purple, dark green, yellow green, blue purple and light green respectively. From the structure, the structural color of the carbon dot superlattice is related to the structure of the carbon dot itself and the arrangement between the carbon dots. The long-range van der Waals attractive force, long-range electrostatic repulsion and π-π stacking effect between the carbon cores are the main driving force for the formation of the carbon dot superlattice. The structural color carbon dot superlattice CD-SL has good potential in the simple and rapid preparation of large-area structural color thin films.

Systems and methods of producing high quality temperature adjustable white light using six different colored LEDs is disclosed. In one embodiment the six LEDs are a Red (630 nm), an Amber (589 nm), a lime LED (568 nm), a green LED (540 nm) a cyan LED (505 nm) and a blue (430 nm). Optimal relative intensities of the RGBACL LED are calculated by solving a matrix relating the CIE tristimulus values Alternatively, optimum relative intensities may be calculated for two light sources lying on a line of constant CCT value, but on opposite sides of the Planckian locus. These relative intensities for each of the light sources are then retained and adjusted as a group to obtain a single white light source of the requested CCT value lying on the Planckian locus.

The invention belongs to the technical field of aureomycin detection, and particularly relates to a preparation method of a carbon quantum dot ratiometric fluorescent probe and a method for detecting aureomycin. The method is based on the characteristic that aureomycin can enable a carbon quantum dot ratio fluorescent probe to correspondingly detect that the color of a system gradually changes from yellow to yellow green to dark blue to light purple to final dark purple under an ultraviolet lamp, and obvious changes occur. Detecting the fluorescence intensity change R425 / R515 of a mixed solution of a to-be-detected sample and D-CDs, and comparing with the standard curve to obtain the aureomycin content in the to-be-detected sample. Besides, a paper-based sensor containing the carbon quantum dot ratio fluorescent probe is prepared, a smart phone is used as a signal reader, carrying is convenient, on-site detection of aureomycin in a limited-resource environment can be achieved, and the detection method is simple, sensitive and efficient.

Disclosed is a light emitting display device including a substrate having first to fourth subpixels, first to fourth anodes provided respectively on the first to fourth subpixels, an emission unit provided on the first to fourth anodes, the emission unit including two or more blue stacks and a phosphorescent stack including at least a yellowish green emission layer and a green emission layer, a cathode provided on the emission unit, a red filter and a color conversion layer provided between the substrate and the first anode, a green filter provided between the substrate and the second anode, and a blue filter provided between the substrate and the third anode, wherein the first anode has a first thickness, and at least one of the second to fourth anodes has a second thickness greater than the thickness of the first anode.

The application discloses a kind of transmission type three-layer composite structure fluorescent ceramic for laser illumination and a preparation method thereof, and the fluorescent ceramic is three-layer composite structure from top to bottom in turn (Re 1‑x Ce x )3Al5O 12 Yellow-green fluorescent layer, transparent high-thermal-conductivity heat-dissipation layer, (A 1‑y Ce y )3(Al 1‑z B z )5O 12 Red fluorescent layer. The preparation method comprises the following steps: placing yellow-green fluorescent ceramic obtained by dry pressing into the bottom of a copper mold, pouring magnesium-aluminum spinel molten liquid into the preheated copper mold, placing red fluorescent ceramic above the molten liquid, and placing the composite structure material obtained after cooling in a muffle furnace for crystallization treatment to obtain the composite structure fluorescent ceramic of yellow-green fluorescent layer / transparent high-thermal-conductivity heat-dissipation layer / red fluorescent layer. The method can realize good connection and combination between different ceramic matrices, and has the advantages of simple process and low cost. The obtained transmission type composite structure fluorescent ceramic can maintain higher luminous intensity at high temperature, and excellent color rendering property can be obtained.

The invention relates to a yellow-green switching self-adaptive electrochromic camouflage system based on green light response and a preparation method thereof. The yellow-green switching self-adaptive electrochromic camouflage system comprises an electrochromic device and a microcontroller, the electrochromism device is of a sandwich laminated structure and comprises two conductive base materials and an interlayer photoresponse electrochromism gel electrolyte. The electrochromic device senses green light and realizes reversible conversion of yellow / green; the microcontroller processes the light signal and applies a coloring / fading voltage signal. According to the invention, the system design is simplified, the communication efficiency and stability of the camouflage system are improved, the response speed and the self-adaptive capability are remarkably improved, the camouflage effect is optimized, and the method has higher applicability.

The invention provides a modulation method and system for perovskite precursor multicolor aggregation-induced emission and application. Dissolving a perovskite precursor component in a polar solvent to prepare a clear or slightly-turbid precursor solution; by adjusting the temperature of the precursor solution to 0-140 DEG C, the precursor solution is excited to generate visible fluorescence under the irradiation of ultraviolet light. When the temperature is 0 DEG C, yellow-green fluorescence can be excited at 30 DEG C, and red-orange fluorescence can be excited at 60 DEG C; after the solvent is volatilized for a long time at the temperature of 140 DEG C, visible fluorescence excited by the residual solution is white light; the temperature is 140 DEG C, and after the volatilized solvent is collected, the excited visible fluorescence is blue light. According to the invention, continuous light-emitting color change from red and yellow to white light and blue can be realized in a single precursor solution system only by means of adjusting the temperature of the solution, and the method has the advantages of rapidness, reversibility, fine controllability and the like. The multicolor light-emitting adjustable system provided by the invention has potential application value in the fields of photoelectric devices and sensing.

The application relates to a fishery lighting LED light source, which comprises a support, a first blue light LED chip, a second blue light LED chip, a bonding wire and fluorescent glue, a bowl cup is arranged on the support; the first blue light LED chip and the second blue light LED chip are arranged at the bottom of the bowl cup and are connected in series, wherein the first blue light LED chip is connected with a conductive part one through the bonding wire, and the second blue light LED chip is connected with a conductive part two through the bonding wire; the bowl cup is filled with the fluorescent glue, the fluorescent glue covers the whole functional area, the first blue light LED chip, the second blue light LED chip and all the bonding wires; the fluorescent glue comprises silicon A glue, silicon B glue, green fluorescent powder, yellow-green fluorescent powder and red fluorescent powder; the fishery lighting LED light source is prepared through the blue light chip and specific fluorescent powder, a double-wave-peak spectrum with good continuity is formed, the peak spectrum band has high sensitivity to the cone cells of marine fishes, has strong penetration in seawater and has good gathering effect on the marine fishes.

The preparation method of a phosphorescent group 7H-indole [2,3-c] quinoline series derivative with light response belongs to the field of organic intelligent materials. Several organic phosphorescent materials with NBCz as the core provided in the application can realize a color change from green or yellow-green afterglow to orange-yellow afterglow under the influence of different light activation times of a 365nm ultraviolet lamp, so as to achieve light-induced phosphorescent color change-stimulative response, and therefore can be widely applied to anti-counterfeiting, data encryption and sensing applications. The organic phosphorescent material with NBCz as the core has the following advantages: (1) simple and easy-to-follow synthesis route; (2) simple light activation condition; (3) large stokes shift, and remarkable effect.

The invention discloses rare earth element Dy / Tb / Eu co-doped aluminum borophosphate tunable luminescent glass, and a preparation method and application thereof, the luminescent glass can realize luminescence tuning from a yellow green area to an orange red area under excitation of light with different wavelengths, has good luminescence stability and thermal stability, and can be widely applied to the fields of WLED or solid-state illumination luminescence and the like. The rare earth element Dy / Tb / Eu co-doped aluminum borophosphate tunable luminescent glass disclosed by the invention is prepared from the following raw materials in percentage by mass: 50.0 to 60.0 percent of P2O5, 15.0 to 25.0 percent of H3BO3, 10.0 to 20.0 percent of Al2O3, 1.0 to 6.0 percent of Li2CO3, 1.0 to 7.5 percent of K2CO3, 0.5 to 3.0 percent of Gd2O3, 0.5 to 1.0 percent of Dy2O3, 0.1 to 0.5 percent of Tb4O7 and 0.3 to 0.9 percent of Eu2O3.

The application discloses a kind of high efficiency high thermal stability high color rendering index composite fluorescent ceramic for solid-state lighting and a preparation method thereof.The composite fluorescent ceramic has a three-layer composite structure, which comprises, from top to bottom, a red fluorescent film, a high light efficiency yellow-green fluorescent ceramic as a substrate, and a copper heat sink.The preparation method comprises the following steps: preparing the high light efficiency yellow-green fluorescent ceramic by batching, tabletting and vacuum sintering; mixing red fluorescent glass powder with an organic binder to obtain a fluorescent glass colloid; spin-coating the fluorescent glass colloid on the surface of the high light efficiency yellow-green fluorescent ceramic, and placing it in an oven for heat preservation to obtain a composite fluorescent glass-ceramic; and fixing the composite fluorescent glass-ceramic on the copper heat sink after sintering.The method can realize good connection and compounding between different ceramic substrates and the copper heat sink, and has the advantages of simple process, low cost and industrial production.The prepared composite fluorescent ceramic has the characteristics of high light efficiency, high thermal stability and high color rendering index.

The present invention discloses a visible light-excited long-afterglow optical ink for anti-counterfeiting and a preparation method thereof. The ink is prepared from a long-afterglow luminescent nanopowder and a thermoplastic compound resin. The mass ratio of the long-afterglow luminescent nanopowder to the thermoplastic compound resin is 1:2-10. The excitation light of the long-afterglow luminescent nanopowder is ultraviolet light and / or visible light, with an emission wavelength of 500-530nm, and has a cyan, green, or yellow-green long afterglow. The thermoplastic compound resin has a solid content of 30-50% and a softening point of 80-130°C. The invention is simple to manufacture, easy to identify for anti-counterfeiting, expands the capacity of encrypted information, and is innovative and environmentally friendly. It invents a tunable multiple encryption method. By regulating the luminescent properties of the long-afterglow luminescent nanopowder, multiple information encryption anti-counterfeiting applications are achieved. This has profound research significance and broad application prospects for avoiding the interference of fluorescence on anti-counterfeiting applications and expanding the forms of anti-counterfeiting encryption.