60 results about "Persistent luminescence" patented technology

A low rare earth mineral photoluminescent structure for generating long-persistent luminescence that utilizes at least a phosphorescent layer comprising one or more phosphorescent materials having substantially low rare earth mineral content of less than about 2.0 weight percent, and one or more fluorescent layers is disclosed. Further disclosed are methods for fabricating and using the inventive low rare earth mineral photoluminescent structure. A low rare earth mineral photoluminescent composition for generating long-persistent luminescence that utilizes at least one or more phosphorescent materials having substantially low rare earth mineral content of less than about 2.0 weight percent and one or more fluorescent materials is also disclosed, as well as, the methods for fabricating and using the inventive low rare earth mineral photoluminescent composition.

A low rare earth mineral photoluminescent structure for generating long-persistent luminescence that utilizes at least a phosphorescent layer comprising one or more phosphorescent materials having substantially low rare earth mineral content of less than about 2.0 weight percent, and one or more fluorescent layers is disclosed. Further disclosed are methods for fabricating and using the inventive low rare earth mineral photoluminescent structure. A low rare earth mineral photoluminescent composition for generating long-persistent luminescence that utilizes at least one or more phosphorescent materials having substantially low rare earth mineral content of less than about 2.0 weight percent and one or more fluorescent materials is also disclosed, as well as, the methods for fabricating and using the inventive low rare earth mineral photoluminescent composition.

The invention discloses a method for manufacturing a long-afterglow device. The method comprises the following steps of: preparing rear earth fluorescent powder; and arranging the rear earth fluorescent powder on a light emitting surface of a luminescent device. The invention also provides the long-afterglow device. According to the invention, the rear earth fluorescent powder is arranged on the light emitting surface of the luminescent device so that the luminescent device can still emit light continuously after power off, therefore, the luminescent device possesses a function of emitting light without power supply, an obvious energy-saving effect is achieved; and the rear earth fluorescent powder is not harmful to human bodies, and can prolong the time of the luminescent afterglow, the luminescent brightness is intensified, the device is maintaining-free, has the advantages of environmentally-friendliness, radioactive safety and the like, and the application fields and using range of the device are widened greatly.

The invention discloses a novel anti-snooping luminous warning optical PUF. The novel anti-snooping luminous warning optical PUF structurally comprises a substrate, an optical PUF dielectric layer growing on the substrate, a long afterglow luminescent material capable of being embedded in the substrate or the optical PUF dielectric layer, and a non-transparent box for packaging the substrate, the optical PUF dielectric layer and the long afterglow luminescent material therein. According to the novel anti-snooping luminous warning optical PUF, the long afterglow luminescent material added into a conventional optical PUF structure still can continuously emit light for a long time after the material is irradiated through a light source for a short time and the light source is turned off, and the light emitting behavior is utilized as a basis for judging whether the PUF is snooped or not, so that the PUF is endowed with an anti-snooping luminous warning function and the defect that a general optical PUF cannot judge whether excitation-response pairs of the optical PUF are snooped by an enemy or not is overcome; the PUF has the anti-snooping luminous warning function, so that the security of the optical PUF is ensured; and therefore, the novel anti-snooping luminous warning optical PUF has true practicality and can be widely applied to quantum authentication and quantum key distribution.

A light assembly for enclosed animal habitats, such as terrariums and aquariums, is provided. The assembly includes a light source, and a reflective luminous surface arranged with respect to the light source to absorb energy from the light source while the light source is turned on, and to emit the stored light for a finite period of time after the light source is turned off. The light assembly is designed to simulate natural light. In one embodiment, the light assembly includes a fixture that generally resembles a conventional light fixture with a reflector, socket and power source connection, with the reflector having a highly reflective, luminous coating that continues to glow to direct light and / or heat to the interior of the habitat after the lamp or heater is turned off.

The invention relates to the field of a light guide and luminous lighting system, in particular to an optical fiber light guide and rare earth long-afterglow luminous lighting system, which comprises a light source, a condensing lens, a plug, a transmission layer, a reflecting layer and a fluorescent layer, wherein light emitted by the light source is condensed through the condensing lens; the light which is condensed through the condensing lens is conducted to the transmission layer through a transmission optical fiber; light is provided for the fluorescent layer by the transmission layer; and the luminous intensity of the fluorescent layer is enhanced through a reflection effect of the reflecting layer on the light. According to the system, the long-afterglow material can be laid on wall faces on two sides of a passage or on the floor by utilizing the characteristic that the long-afterglow material can still emit light when the light source disappears so as to provide indication and escape lighting for the safety passage of a public place; and the system is used on various road guardrails as an indication light source at night or for guiding in greasy weather and providing warning for safe running of an automobile so as to prevent traffic accidents.

The invention discloses a false-proof element and a manufacturing method thereof, a safe article, and an article detection method and device. The false-proof element includes at least one kind of optical fragment; the emission spectrum of the optical fragment is A under the irradiation of a special laser; and the optical fragment continuously emits light in a preset time period after the laser is turned off, and the emission spectrum of the optical fragment is B during continuous light emitting, wherein the emission peak wave length of the emission spectrum B is not within a spectrum range of the emission spectrum A. The provided false-proof element includes a kind of light emitting fragment, fluorescence emitted by the light emitting fragment while the light emitting fragment is excited and phosphorescence emitted by the light emitting fragment after excitation stops have different light emitting peaks of different wavelengths. Through on-off of excitation light, the element generates a light change effect on the basis of a time domain, continuous change of various fluorescence colors can be achieved, and different light emitting materials can be selected as needed according to the wavelength.

The invention discloses a long persistent luminescence emitter which has an electron-donating molecule that is stable in the radical cation state and an electron-accepting molecule that is stable in the radical anion state and from which luminescence is observed at 10 K after photo-irradiation of the long persistent luminescence emitter stops. According to the disclosed invention, persistent luminescence can be exhibited for a long time with only organic compounds without the use of any rare-earth elements.

The invention discloses a manufacturing method of a solvent-free thermochromic luminescent synthetic leather. The method includes the steps that firstly, a long-afterglow luminescent material is subjected to surface group activation modification; then, the modified long-afterglow luminescent material and a thermochromic capsule are introduced into a polyurethane surface layer at the same time through a bi-component in-situ coating technology, and the solvent-free thermochromic luminescent synthetic leather is obtained. The problems are solved that an existing blended compound luminescent material has poor compatibility with polyurethane, migration separation-out occurs easily and distribution is not uniform. The synthetic leather can absorb and store sunlight in the daytime and continuously emit light at night, the color can change reversibly with temperature in the daytime, the color of light can also change with temperature at night, the color of polyurethane can be controlled by changing temperature, the synthetic leather can have new styles and designs, the functionality of the synthetic leather is improved, and the application range of the synthetic leather is broadened. No organic solvent is used in the preparation process, which meets the development tendency of the synthetic leather industry and the green consumption and environmental health requirements of consumers.

The invention discloses synthetic leather with noctilucent property. The synthetic leather sequentially comprises a base layer, a resin layer, a noctilucent layer and a transparent film layer from the inside to the outside, wherein the noctilucent layer is formed by mixing 40-60 parts of acrylic resin, 1-5 parts of bentonite, 10-12 parts of xylene, 2-4 parts of butyl acetate, 20-50 parts of noctilucent powder, 10-20 parts of strontium aluminate excitant and 0.5-3 parts of auxiliaries. The synthetic leather with the noctilucent property disclosed by the invention is high in luminescent intensity, capable of continuously emitting light for more than 10 hours as long as absorbing any visible light for more than 10 minutes, sturdy and durable, and capable of being infinitely and cyclically used, thus breaking through the use limit of five or six hundreds.

The invention discloses an organic super-long room-temperature phosphorescent material which is an organic phosphonium salt prepared by taking triphenylphosphine as a raw material, the compound can still continuously emit light for a period of time after an excitation light source is turned off after 300nm ultraviolet irradiation, and multiple digital encryption is realized by utilizing phosphonium salt crystals with the same light emitting color and different light emitting lives; secondly, an ethanol solution of the organic phosphorescent material is used as safe ink, so that multiple safe anti-counterfeiting effects are achieved.

The invention discloses preparation and application of an organoboron phosphorescent material with the ultra-long lasting luminescent performance. By molecular design, electron-absorbing group difluoro boron and various donor groups are introduced in molecular, and the organoboron phosphorescent material with the ultra-long lasting luminescent performance is synthesized. The organic long lasting material has the advantages that the costs of raw materials are low, synthesis is easy and convenient, lasting luminescence for several seconds is achieved after an excitation source is closed, and thefluorescence quantum efficiency is high. Wide potential application value of the material is achieved in the fields such as anti-fake, bioimaging and photoelectric materials, and the organoboron phosphorescent material is expected to be applied to the fields such as anti-fake and organic light-emitting devices.

The present invention provides a photoluminescent coating material, which comprises 12-35% of a photoluminescent material, 1-8% of natural muscovite powder, 2-6% of a dispersing agent, 1-3% of a film forming aid, 1-2% of a thickener, 0.5-2% of an antifoaming agent, 12-20% of a polymer emulsion, and the balance of deionized water. The present invention further provides a preparation method of the photoluminescent coating material. The photoluminescent coating material of the present invention has characteristics of stable performance and storage resistance of the coated product, good decoration effect, good luminescence luminosity, and high luminescence brightness, wherein the luminescence can last for more than 10 h after the photoluminescent coating material absorbs light for 1 h.

The invention relates to a yellow long-afterglow luminescent material utilizing calcium stannate as a luminescent material substrate, trivalence dysprosium irons Dy<3+> as a luminescent activating agent and boric acid as a material synthesis fluxing agent. The invention also provides a preparation method of the yellow long-afterglow luminescent material. The preparation method comprises the steps of measuring raw materials such as CaCO3, SnO2, H3BO3 and Dy2O3 according to a chemical measuring ratio, sufficiently grinding the raw materials, uniformly mixing the ground raw materials to obtain a mixture I, filtering the mixture I by means of a sieve with the granularity of 180-220 meshes to obtain mixed powder, tabletting the obtained mixed powder, then calcining the mixed powder, naturally cooling the mixed powder to room temperature, grinding the mixed powder, filtering the mixed powder by means of the sieve with the granularity of 180-220 meshes, thereby obtaining the yellow long-afterglow luminescent material. After being radiated by ultraviolet rays, the material emits out light in yellow rays; after a light source is moved away, the material can continuously emit out light in a luminescent brightness capable of being distinguished by eyes. The preparation method of the yellow long-afterglow luminescent material is simple, pollution-free, radiation-free and low in cost.

The invention relates to an animal ear tag capable of performing photoluminescence. The animal ear tag can still emit light continuously after exciting light stops irradiation, does not consume electric energy, can store the absorbed natural light, takes on bright and differentiable visible light, has a lighting function and can mark animals at night conveniently. The animal ear tag has the characteristics of storing light by using sunlight or lamplight and emitting light at night or in dark places. Marks such as characters or patterns and the like on the ear tag can be discriminated without other light sources. The ear tag has advanced, novel and convenient design and high functionality.

The chemical composition formula of the zinc-germanium oxide long-afterglow luminescent material is Zn2GeO4: XC, C is Eu < 3 + > or Dy < 3 + >, and X is greater than or equal to 0.001 and less than or equal to 0.1. The preparation method of the oxide comprises the following steps: taking a proper amount of raw materials to prepare a solution with a certain concentration, mixing in a beaker according to a certain proportion, adjusting to a required pH value, magnetically stirring uniformly, loading into a high-temperature reaction kettle with a polytetrafluoroethylene lining, heating to 220 DEG C, keeping the temperature for 4 hours, and cooling to room temperature after the reaction is finished, taking out a reaction product, centrifuging, washing and drying to obtain a product. The material obtained by the invention can emit green afterglow after being irradiated by ultraviolet light, the afterglow time can reach 500 seconds, and the long afterglow material takes Zn, Ge and O elements as a matrix and Dy < 3 + > or Eu < 2 + > as an afterglow luminescence center, and has better thermal stability and chemical stability. The innovation of the invention is that a rare earth material is introduced as an activator, the long-afterglow luminescent material is synthesized by a hydrothermal synthesis method, the synthesized long-afterglow luminescent material has small and relatively uniform particle size and excellent sustainable luminescence performance, and provides possibility for in-depth study of in-vivo imaging, biological targeted therapy and other medical fields.

The invention provides a method for preparing hollow microsphere doped glass. The method comprises the following steps: S1, mixing first glass powder, a dispersing agent and a foaming agent into uniform slurry, centrifuging and atomizing the slurry, and drying in a drying oven to obtain a microsphere blank; S2, sintering the microsphere blank to obtain hollow glass microspheres; S3, uniformly mixing second glass powder with the hollow glass microspheres, melting, quenching and annealing to obtain glass doped with the hollow glass microspheres, wherein the melting temperature is lower than themelting temperature of the hollow glass microspheres. Under the condition that the long-afterglow material is added in the S1, the glass doped with the long-afterglow hollow microspheres is obtained.The glass can absorb ultraviolet light to play a role of a light-emitting center and can continuously emit light at night, and when the glass is applied to a photovoltaic module, the photovoltaic module can also be in a working state at night.

The invention discloses a ligand compound and a functionalized metal-organic framework compound prepared from the ligand compound, and preparation methods and applications thereof. The structure of the ligand compound is represented by formula (I), the ligand compound is used as a ligand, the ligand compound and cadmium chloride are self-assembled to form the functionalized metal-organic frameworkcompound, and the functionalized metal-organic framework compound has high fluorescence quantum yield and long room-temperature phosphorescence lifetime, and has the advantages of high emission intensity and stable luminescence property; and under the vacuum condition, after an excitation light source is turned off, long-time continuous light emitting still exists. LIFM-ZCY-1 does not contain mercury, is nontoxic and non-volatile, is easy to recycle and has environmental friendliness; and the LIFM-ZCY-1 can be used for counterfeiting prevention through room-temperature phosphorescence characteristics, shows optical properties negatively related to the oxygen content, can be prepared into a light-emitting device, an anti-counterfeiting material and / or an oxygen sensor for application, andhas wide application value.

The invention discloses a bi-component organic room-temperature phosphorescent material and a preparation method thereof, the bi-component organic room-temperature phosphorescent material is doped in a host-guest form, the synthesis steps are simple, the cost is low, the stability is good, under a dry condition, the bi-component organic room-temperature phosphorescent material has an ultra-long luminescence life, after being excited by a 254nm ultraviolet light source and under a dark condition, the bi-component organic room-temperature phosphorescent material can still continuously emit light, and after water is added, the luminescence quantum efficiency is improved.

The invention discloses an organic-inorganic two-dimensional perovskite room-temperature phosphorescent material as well as a preparation method and application thereof, and the organic-inorganic two-dimensional perovskite room-temperature phosphorescent material with long afterglow luminescence performance is synthesized by selecting an organic layer with a strong electron-donating group and an inorganic layer with a relatively strong rigid structure through molecular design. The two-dimensional perovskite room-temperature phosphorescent material disclosed by the invention has the advantages of low raw material price, simple synthesis method, capability of continuously emitting light for several seconds after an excitation light source is turned off, and the like. The material has wide potential application value in the fields of anti-counterfeiting encryption, photoelectric materials and the like, and is expected to be applied to the fields of anti-counterfeiting encryption, electroluminescent devices and the like.

The invention discloses a 3D printing ABS composite material capable of continuously emitting light and a preparation method thereof. The preparation method comprises the following steps: respectively weighing long afterglow fluorescent powder, KH550, ABS particles and ABS powder; adding the KH550 into deionized water, carrying out hydrolyzing and stirring, adding fluorescent powder, performing refluxing, cooling and washing, carrying out vacuum drying to constant weight, and conducting grinding to obtain KH550 modified fluorescent powder; after the ABS powder is acidified by hydrochloric acid, grafting the acidified ABS powder with the KH550 modified fluorescent powder through HATU to obtain a composite material; and subjecting the composite material to melting and manufacturing through a 3D printing extruder, and carrying out extrusion and drawing to obtain the 3D printing ABS composite material capable of continuously emitting light. According to the preparation method, the combination of a long-afterglow luminescent material and a 3D printing technology is realized, and the prepared 3D printing composite material not only can continuously emit light, but also has good mechanical properties, can be applied to the aspects of medicine, the manufacturing industry, the food industry, the industry, the jewelry industry and the like, and greatly expands the application field of 3D printing.

The invention relates to a composite light-storing ceramic for fire-fighting indication and a preparation method thereof. The preparation method comprises the following steps: respectively weighing light storage powder and glass powder according to a ratio, putting the light storage powder and the glass powder into a granulator, and directly stirring and granulating to obtain a mixture; directly screening the mixture through a screen in a distributing machine and flatly laying into a mold, then covering the surface of the mixture with a frosted glass sheet printed with patterns, and feeding the frosted glass sheet and the frosted glass sheet into a roller kiln together to be fired; dividing a roller kiln into a preheating zone, three sintering zones, a quenching zone and a slow cooling zone, and dividing the roller kiln sintering step into a pre-sintering stage, three sintering stages and two cooling stages; and further processing the sintered ceramic product according to requirements.According to the composite light-storing ceramic prepared by the invention, after 20 minutes of light storage, 18 hours (more than 0.32 mcd / m <2>) of continuous luminescence can be realized at most,and the initial 1 min intensity is more than 4800 mcd / m<2 >; wherein the intensity is greater than 44 mcd / m<2> (outdoor sunlight is directly irradiated for 20 min, a fluorescent lamp is used for 30 min, ultraviolet rays are used for 5 min, and the room temperature is tested at 25 DEG C).

The invention provides a luminescent fibre. Luminescent master material as an additive is added into fibre to prepare the luminescent fibre through the process of light absorption, light accumulation and irradiation. The luminescent fibre has no toxicity, no innocuity, no radioactivity, lustrous surface, flexible texture and good antiaging performance; after the luminescent fibre absorbs various visible lights for 10 minutes, the luminescent fibre can keep irradiating for over 6 hours in darkness.

The invention provides a device for detecting the long persistent luminescence of an optical network unit (ONU). The device comprises a long persistent luminescence hardware detection enabling circuit for sending an effective detection enabling signal to a long persistent luminescence hardware detection circuit upon receiving an effective enabling signal sent from a CPU or judging the CPU to be in the abnormal state; the long persistent luminescence hardware detection circuit used for outputting a notifying signal to notify the ONU to turn off a power supply when detecting that the duration of a light-emitting indication signal is larger than a predetermined longest light-emitting time after receiving the detection enabling signal sent from the long persistent luminescence hardware detection enabling circuit or outputting a notifying signal to notify the ONU not to turn off the power supply when detecting that the duration of the light-emitting indication signal is not larger than the predetermined longest light-emitting time. According to the technical scheme of the invention, the long persistent luminescence problem of the ONU is effectively solved even under the condition that the CPU itself works abnormally. The ONU, with the long persistent luminescence problem, is automatically drawn out of the production line. Therefore, the whole network is not affected at all.

The invention discloses a preparation method of a luminescent ceramic material. The luminescent ceramic product is red, blue, purple or green fluorescent ceramic; red luminous powder is contained in the red fluorescent ceramic; blue luminous powder is contained in the blue fluorescent ceramic; purple luminous powder is contained in the purple fluorescent ceramic; green luminous powder is contained in the green fluorescent ceramic. Compared with the prior art, the luminescent ceramic material, the preparation method and application have the advantages that the luminescent ceramic material is applicable to various ceramic tiles or glass; the obtained fluorescent product can be continuously luminescent in dark places after the material with the functions of light absorption, light storage and luminescence absorbs various kinds of visible light and reaches the saturation; the cycle use without the number of times is realized; the afterglow time is long; the brightness is high; a series of characteristics of corrosion resistance, abrasion resistance, aging resistance, flame retardance, no toxic and side effects, no radioactivity and the like are realized.

This invention provides a groundbreaking approach to PLNPs and their preparation. In particular, the synthetic methodology disclosed herein fundamentally differs from the traditional solid-state annealing reactions that require extreme and harsh reaction conditions. In one unique aspect of the invention, a simple, one-step mesoporous template method utilizing mesoporous silica nanoparticles (MSNs) is disclosed that affords in vivo rechargeable NIR-emitting mesoporous PLNPs with uniform size and morphology. In another unique aspect of the invention, the novel synthetic approach is based on aqueous-phase chemical reactions conducted in mild conditions, resulting in uniform and homogeneous PLNPs with desired size control (e.g., sub-10 nm).

The invention discloses a polyester high-strength netting twine with a self-luminous function and a preparation method thereof. The preparation method comprises the following steps of compounding an alkaline earth aluminate luminous material and an alkaline earth silicate luminous material to obtain mixed luminous powder; dynamically and statically mixing a self-luminous polyester master batch melt containing high-concentration luminous powder with an ordinary polyester melt to obtain a mixed melt containing low-concentration luminous powder; spinning self-luminous polyester FDY filaments which have large amorphous regions and low crystallinity and are more suitable for multi-stage drawing by adjusting and controlling spinning parameters; and then, performing low-speed multi-stage drawingtreatment on the self-luminous polyester FDY filaments . The polyester high-strength netting twine with the self-luminous function prepared by the preparation method provided by the invention has theadvantages that the fracture intensity is greater than 6.5 cN / dtex, the boiling water shrinkage rate is lower than 4 percent, and after sufficient light illumination, the polyester high-strength netting twine can continuously emit light in the dark for 12 h or longer.

The invention provides a single-ended DC (direct current) input LED (light-emitting diode) straight-tube fluorescent lamp which comprises an LED illuminator and a lamp tube, wherein the inner wall of the lamp tube is coated with a fluorescent powder coating, one end of the lamp tube is open and the other end of the lamp tube is closed, and the LED illuminator is installed at the open end of the lamp tube; and the peak wavelength of the spectrum of light emitted by the LED illuminator is between 320nm and 480nm. Since the LED illuminator capable of emitting blue and violet light is mounted at the open end of the lamp tube, the peak wavelength of the spectrum of light emitted by the LED illuminator is between 320nm and 480nm, and the fluorescent powder coating is coated on the inner wall of the lamp tube, and when blue and violet light emitted by the LED illuminator irradiates the fluorescent powder coating on the inner wall of the lamp tube, the fluorescent powder coating is activated to emit light continuously. In the invention, mercury grains causing environment pollution are not used, and the lamp tube does not need to be vacuumized, therefore the single-ended DC input LED straight-tube fluorescent lamp has the advantages of an LED lamp, such as energy saving, environmental friendliness and long service life, and also has the characteristics of a fluorescent lamp, such as high luminous flux and high unit power lumen, is energy-saving and environmentally-friendly.

The invention relates to the technical field of medical aids, and specifically to a method for producing a fluorescent fabric for a medical first-aid kit. Blended fibers are placed into a fluorescent agent for soaking and then dried, in which the fluorescent agent is made from such raw materials as dioctyl phthalate and an organic phosphonic coupling agent; the blended fibers are processed into a blended fabric; the blended fabric is coated with a layer of waterproof adhesive; afterwards, the blended fabric is plasticized. The method for producing a fluorescent fabric for a medical first-aid kit provided by the present invention allows the fluorescent agent to be absorbed by the blended fibers to an utmost extent such that the produced fluorescent fabric is able to keep the fluorescent properties persistently. Particularly, the fluorescent agent is added with the component organic phosphonic coupling agent component that is capable of remarkably improving the persistent luminescence of a photo-induced energy-storage luminous powder in the fluorescent agent as compared to a traditional silicone coupling agent. The waterproofness and friction durability of the fabric can be remarkably improved by means of application of the waterproof adhesive and plasticization to the blended fabric.

The invention discloses an LED energy-saving lamp capable of saving energy and achieving light-operated illumination. The lamp structurally comprises a controller, a lamp holder, an induction block and a lamp body, due to the fact that a current is cut off in time by an instant inductor when a flash lamp suddenly illuminates, a bulb stops emitting light; and with the change of the current around aconducting strip through a push block, the conductive tube moves up and down to be in contact with a conductive sheet to electrify the lamp holder, so that the current between the lamp holders can beimmediately cut off, the bulb can continuously emit light for a period of time to be extinguished, the imaging environment luminosity of the camera is not changed, and the imaging definition is keptnormal; because the conductive tube is affected by too fast reduction of the own gravity, the current of the lamp holder becomes intermittent to accelerate aging; a clamping block in a supporting rodis movably matched with the conductive tube, so that the contact area between the clamping block and the outer wall of the conductive tube is increased, the friction force is increased, the moving speed of the conductive tube is limited, slow moving of the conductive tube is facilitated, the lamp holder is protected, and the service life of the lamp holder is prolonged.