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42results about How to "Wide range of discoloration" patented technology

Gelatinous polymer electrolyte and preparation method for solid electrochromism device based on conductive polymer

ActiveCN104698717AQuick color changeConfirmed electrochromic performanceNon-linear opticsPolymer electrolytesElectrolysis
The invention discloses a gelatinous polymer electrolyte and a preparation method for a solid electrochromism device based on a conductive polymer. The gelatinous polymer electrolyte has the advantages of good environment stability and high ionic conduction. The preparation method for the solid electrochromism device based on the conductive polymer comprises the following steps: using the working electrode deposited by a conductive polymer membrane with electrochromism performance as the positive electrode, uniformly coating the gelatinous polymer electrolyte on the surface of the conductive polymer membrane of the positive electrode material, after an electrolysis solvent A is partially volatilized and becomes thicker, taking a blank conductive substrate with the same material as the negative electrode, packaging and assembling the positive and negative electrode materials by using double faced adhesive tapes, and finally stilly placing the assembled device in the shade place for 1-4 days. The solid device based on the conductive polymer is easy to assemble and prepare, and has the electrochromism performance, so the solid device based on the conductive polymer has large application prospect in the fields, such as the display, the intelligent window, and the electronic paper.
Owner:ZHEJIANG UNIV OF TECH

Monodisperse superparamagnetic nano crystal colloidal core-shell composite particles and preparation method thereof

The invention discloses monodisperse superparamagnetic nano crystal colloidal core-shell composite particles, which are monodisperse superparamagnetic nano cluster particles which are gathered by ferroferric oxide nanocrystalline. The surfaces of the particles are coated by polyvinylpyrrolidone. The preparation method of the composite particles comprises the following steps: adding trivalent iron salt to polyol mixture solution of polyvinylpyrrolidone and polyhydroxy compounds; agitating until the trivalent iron salt is completely dissolved; adjusting the pH value to 8.0-10.0, then carrying out enclosed heating to 180-240 DEG C, and carrying out heat preservation for 6-48 hours. The monodisperse superparamagnetic nano crystal colloidal core-shell composite particles disclosed by the invention can be assembled into different colors of photonic crystal in a magnetic control manner; the dependency level of the magnetic photonic crystal on the solvent polarity, the ion strength and the pH value can be reduced.
Owner:WUHAN UNIV OF TECH

Quasi-solid electrolyte for flexible electrochromic film and preparation method of quasi-solid electrolyte

The invention provides a quasi-solid electrolyte for a flexible electrochromic film, a preparation method of the quasi-solid electrolyte, a flexible electrochromic film and a preparation method of theflexible electrochromic film. The quasi-solid electrolyte for the flexible electrochromic film comprises PVB resin, a dispersing agent, inorganic lithium salt, nano inorganic particles and an auxiliary agent, and the molecular weight of the PVB resin is 60000-200000. The quasi-solid electrolyte disclosed by the invention is good in ionic conductivity, light transmittance, film-forming property and cohesiveness, and the assembled flexible electrochromic film has a relatively large discoloration range at a low voltage and is excellent in overall performance.
Owner:CHINA LUCKY FILM CORP

Conductive and reflective layer and application thereof in electrochromic device

The invention relates to a conductive and reflective layer and application thereof in an electrochromic rearview mirror. The conductive and reflective layer is mainly characterized by comprising a transparent metallic oxide layer, a metallic reflective layer, a transparent conductive layer and a high-refraction-rate layer in sequence, and one side of the high-refraction-rate layer can further comprise a low-refraction-rate layer and a second high-refraction-rate layer in sequence. The conductive and reflective layer has low loss of visible light. The electrochromic rearview mirror has a widercolor change interval and higher sensitivity.
Owner:NINGBO MI RUO ELECTRONICS TECH CO LTD

Stimulable response colour changing functional coating, and preparation method and application thereof

The invention belongs to technical field of coatings, and particularly relates to a stimulable response colour changing functional coating, and a preparation method and application thereof. The invention provides the stimulable response colour changing functional coating, which is prepared from the following raw materials: epoxy resin, a furanone pigment, an amine curing agent and a solvent. According to the stimulable response colour changing functional coating, the furanone pigment comprises organic conjugated conductive molecules; hydrogen bond-containing cross-linking molecules are formedby reacting the amine curing agent and the furanone pigment; the cross-linking molecules can show extremely good electronic transition behaviour under different environmental stimuli; the cross-linking molecules are unstable; and electron transitions of different properties can be produced through different stimulus conditions to endow the coating with a colour changing property, so that the coating has different colours under the different environmental stimuli. An experimental result shows that the stimulable response colour changing functional coating provided by the invention has the properties of thermally induced colour changing, ultraviolet induced colour changing and strong acid colour charging; the colour changing stimulating conditions are diversified; and the colour changing range is wide.
Owner:SHAANXI SCI TECH UNIV +1

Electropolarized particle, preparation method thereof, and application of electropolarized particle to electropolarized color-changing optical film

The invention discloses an electropolarized particle, a preparation method thereof, and application of the electro-polarized particle to an electropolarized color-changing optical film. The electropolarized particle is a rod-like metal complex formed by chemical reaction based on metal iodide, carboxylic acid nitrogen-containing organic molecules, iodine elementary substance, cellulose suspending aid and the like. The electropolarized particle can be used for preparing the electro-polarized color-changing optical film. The electropolarized color-changing optical film comprises a substrate, and a first conductive film, an electric polarization color-changing film and a second conductive film which are sequentially arranged on the substrate. The electropolarized particle has the characteristics of simple operation, easy large-scale preparation and the like. The electropolarized color-changing optical film prepared from the electropolarized particle has the advantages of being wide in transmittance color-changing range, low in haze, high in response speed and the like under voltage driving.
Owner:SHAOXING DIFEI NEW MATERIAL CO LTD

Method for preparing electrochromic device

The invention relates to a method for preparing an electrochromic device. The preparation method comprising the steps: (1), preparing a first transparent conductive layer; (2), preparing an electrochromic layer; to be specific, plating the surface of the first transparent conductive layer with an electrochromic film by using a plasma vacuum film-plating device to form an electrochromic layer; (3),preparing an ion conducting layer; (4), preparing an ion storage layer; to be specific, plating the surface of the ion conducting layer with an ion storage layer film by using a plasma vacuum film-platingg device to form an ion storage layer; (5), preparing a second transparent conductive layer; (6), preparing an ion barrier layer; (7), preparing an isolation layer; and (8), carrying out laser electrode etching. The method has the following advantage: the electrochromic device prepared by the preparation method has characteristics of wide discoloration range, high fading state transparency and fast discoloration speed.
Owner:NANTONG FANHUA NEW MATERIALS TECH CO LTD

Preparation of novel viologen electrochromic material and application thereof

The invention relates to a preparation and application of a novel viologen electrochromic material. The preparation method comprises the steps of taking 4,4'-bipyridyl as a raw material, and performing Menschutkin reaction with halogenated alkane to synthesize monosubstituted 4,4'-bipyridyl salt; then, importing aromatic groups into the monosubstituted 4,4'-bipyridyl salt to increase a conjugatedstructure of molecules, and then increasing the stability of the molecules and improving the radiation resistance and temperature resistance of molecular chains. In addition, along with the growth ofmolecular chains and the importing of the aromatic groups, the electron-deficient state on 4,4'-bipyridyl of the core group of the viologen compound is improved, a proper substituent is selected, different colors can be obtained by adjusting the molecular orbital energy level and the charge transfer capacity, and the possibility is provided for realizing multicolor display. The viologen electrochromic material obtained by the invention is higher in transmittance difference, quicker in color change, lower in color change voltage and longer in service life, and the electrochromic device preparedby using the viologen electrochromic material has outstanding color change performance and cost advantage.
Owner:INST OF PROCESS ENG CHINESE ACAD OF SCI

Electrically expandable colloidal crystal thin film preparation method

ActiveCN106810707ASimple processNo feature requiredMaterials preparationMicrosphere
The invention relates to a colloidal crystal thin film preparation method, in particular to an electrically expandable colloidal crystal thin film preparation method and solves the problem of difficulty in preparation of existing electrically expandable polymer materials. The method includes: step one, monodispersed polystyrene microsphere preparation; step two, ferrocenyl derivative synthesis; step three, electrically expandable colloidal crystal material preparation. The method is used for preparing electrically expandable colloidal crystal thin films.
Owner:HARBIN INST OF TECH

Electrochromic material, composition, preparation method, electrochromic device, shell assembly and electronic equipment

The invention discloses an electrochromic material, a composition, a preparation method, an electrochromic device, a shell assembly and electronic equipment. The electrochromic material has a structural formula shown as a formula (I), wherein R1, R2, R3 and R4 are respectively and independently hydrogen, halogen, alkyl, haloalkyl or an oxygen-containing hydrocarbon functional group; Yis methyl, ethyl or one bond; and R6 and R7 are respectively and independently hydrogen, methoxy, methyl or trifluoromethyl. The electrochromic material has better durability, higher coloring state and transparentstate contrast and higher response speed, and is suitable for being applied to electronic equipment with higher requirements on discoloration / fading, such as mobile phones, mobile terminals or camerashooting equipment and the like.
Owner:GUANGDONG OPPO MOBILE TELECOMM CORP LTD +1

Preparation method of responsive structural color optically variable anti-counterfeiting coating

The invention relates to a preparation method of a responsive structural color optically variable anti-counterfeiting coating, which comprises the following steps of: preparing 100ml of a SiO2 microsphere aqueous dispersion with the mass fraction of 10-15% and the diameter of 150-220nm, adding 0.3-0.8 mg of carbon quantum dot powder and 0.1-0.4 mg of a photochromic polymer into the aqueous dispersion, magnetically and stirring at room temperature for 10-20 minutes for and sufficient mixing to obtain uniformly dispersed dispersion liquid to be sprayed; constructing a structural color pattern ona substrate by using a method of spraying nanoparticles on a mask; and then plating a metal film on the surface of the constructed structural color pattern. By adding the carbon quantum dots into thespraying dispersion liquid, the color change range of the obtained anti-counterfeiting coating is wider, and recovery is faster; and spiropyrane is positioned in a cross-linked structure of polyesteras a color-changing compound, and the unique structure can enable spiropyrane to be protected by polyester with relatively stable properties, so that the color-changing compound is prevented from being influenced by an external environment, the spectral response is more sensitive, and the color-changing effect is good.
Owner:่‹ๅทžๅฎ็ฆๆๆ–™็ง‘ๆŠ€ๆœ‰้™ๅ…ฌๅธ

Cadmium sulfide pectinate semiconductor micro/nano material and preparation method thereof

The invention relates to a cadmium sulfide pectinate semiconductor micro / nano material and a preparation method thereof, belonging to the technical field of photochromism. The preparation method comprises the following steps: putting cadmium sulfide and tin dioxide at the center of a quartz pipe of a pipe furnace, putting a gold-plated silicon wafer as a substrate into upstream or downstream the air flow of the quartz pipe of the pipe furnace, introducing carrier gas, heating, keeping the temperature for 1-3 hours, shutting down the pipe furnace, continuing introducing carrier gas, and cooling to room temperature to obtain the tin-doped cadmium sulfide pectinate micro / nano material. The tin-doped cadmium sulfide pectinate micro / nano material has the new application of color variations, and has the characteristics of low cost, simple preparation process and wide raw material sources. Compared with the existing photochromic material, the cadmium sulfide pectinate semiconductor micro / nano material is easier to implement, can implement color variations in real time, and has more color options, so that the photochromic range is more abundant. The invention can be widely applied to the fields of laser display, laser televisions, anti-counterfeiting materials and military wave-absorbing materials.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY

Flexible electroluminescent device capable of dynamically changing color and preparation method thereof

PendingCN112087836AConstant Luminous BrightnessConstant luminous colorElectrical apparatusElectroluminescent light sourcesElectrical field strengthEngineering
The invention belongs to the technical field of intelligent electronic devices, and particularly relates to a flexible electroluminescent device capable of dynamically changing colors and a preparation method thereof. The preparation method comprises the following steps of uniformly blending electroluminescent powder and a polymer solution to obtain a composite active material, stacking double light-emitting layers with different dielectric constants on a flexible transparent conductive substrate layer by layer through a solution film forming method, and constructing an electrode layer on theupper layer to prepare the flexible electroluminescent device. In the process of increasing the intensity of a driven electric field, the light emitting color of the device can be changed from orangelight to white light in real time and then to blue light. The electroluminescent color-changing device provided by the invention has excellent flexibility and mechanical stability, and can be designedinto various shapes to display different patterns. The electroluminescent color-changing device can play a huge application potential in the field of intelligent wearable equipment for camouflage orfashion decoration and the like.
Owner:FUDAN UNIV

Preparation method of vanadium-doped double-layer nickel oxide electrochromic film

InactiveCN110171931AIncreased speed in and out of the filmClosely arrangedCoatingsNon-linear opticsCyclic processVanadium doping
The invention discloses a preparation method of a vanadium-doped double-layer nickel oxide electrochromic film. The ratio of doped vanadium ions can be effectively controlled by controlling the sputtering power ratio of a vanadium target and a nickel target. NiO deposited in the lower layer of the film belongs to a crystalline state, crystal lattices of the film are closely arranged, the degree oforder is good, and the film is uneasy to degrade in the circulating process, therefore, the stability of the film with the structure in the circulating process is guaranteed. In conclusion, a synergistic effect between a crystalline film and the doped film can enable the electrochromic performance of the nickel oxide film to be obviously improved. The preparation method of the vanadium-doped double-layer nickel oxide electrochromic film is simple and convenient to operate, is easy to promote and plays very positive significance in commercial promotion of the NiO electrochromic film.
Owner:JILIN AGRI SCI & TECH COLLEGE

A fluorescent wide chromaticity test paper for visual detection of copper ions and its preparation method and application

The invention discloses fluorescent wide chroma test paper for visually detecting copper ions as well as a preparation method and application of the test paper. The preparation method comprises the following steps: by taking a three-color ratio fluorescence probe as ink and taking filter paper as a solid-phase carrier through an inkjet printer, uniformly printing, thereby obtaining the test paper capable of visually detecting the copper ions, wherein the three-color ratio fluorescence probe refers to blue carbon dots, green quantum dots and red quantum dots, and the quantum dots are all modified by 3-mercaptopropionic acid. The three-color ratio fluorescence test paper is constructed to be used for visually detecting the copper ions by utilizing double-quenching principle first, the prepared detection test paper has the advantage that the color change range is wide compared with the conventional double-ratio fluorescence test paper, and along with addition of the detection object, test paper colors can be obviously identified by naked eyes from light scarlet, light flesh color, deep orange, grass green, dark olive green, slate blue, royalblue to cyanic color (Figure 4).
Owner:NANJING MEDICAL UNIV

Use of photochromic cadmium sulfide comb-shaped semiconductor micro-nano material

The invention relates to a use of a photochromic cadmium sulfide comb-shaped semiconductor micro-nano material and belongs to the technical field of photochromism. The photochromic cadmium sulfide comb-shaped semiconductor micro-nano material can be used as an anti-counterfeit material, a military wave-absorbing material, a decorative material or a biological fluorescent labeling material and can be used for a laser display field, a laser television field, a biological chip field or a laser cryptography field. The invention provides a novel approach for a cadmium sulfide nano-comb doped with tin in color change application. The photochromic cadmium sulfide comb-shaped semiconductor micro-nano material has the characteristics of low cost, simple making method and wide raw material sources. Compared with the existing color-variable material, the photochromic cadmium sulfide comb-shaped semiconductor micro-nano material is obtained more easily, realizes real-time color change, and has more color change choices and wider color change ranges. The photochromic cadmium sulfide comb-shaped semiconductor micro-nano material has wide application prospects in fields of laser display, laser television, anti-counterfeit materials and military wave-absorbing materials.
Owner:ๅˆ˜็‘žๆ–Œ

Synthesis method of POSS-based reversible thermochromic membrane material

ActiveCN112980021AObvious discolorationSynthetic scheme economyThermochromismColor changes
The invention discloses a synthesis method of a POSS-based reversible thermochromic membrane material, and belongs to the technical field of synthesis of color-changing materials. The invention solves the problem that color-changing materials at the temperature of 80-200 DEG C are few at present. The method comprises the following steps: dissolving POSS in water; adding a chromium salt into the POSS aqueous solution; and stirring at 20-40 DEG C for 1-24 hours, and volatilizing the solvent at 20-80 DEG C to obtain the POSS-based reversible thermochromic membrane material after the solvent is completely volatilized. The POSS-based reversible thermochromic membrane material is synthesized for the first time, the color change range is 80-200 DEG C, the color change is obvious, and the application field of POSS is expanded. According to the method, the POSS-based membrane material with various color changes can be synthesized. The method has the advantages of simple post-treatment method, mild treatment conditions, wide color change range of the membrane material, high color change speed and the like. Water is used as a solvent, the POSS-based color-changing membrane material is generated through low-temperature reaction, and the method is green, environmentally friendly and mild in reaction condition.
Owner:HARBIN INST OF TECH

Polyaniline derivative and preparation method thereof

The invention relates to a polyaniline derivative and a preparation method thereof. The polyaniline derivative is characterized in that the components of the raw material comprise monomer aniline and monomer o-phenetidine, between which the quantity relative ratio is (0-1):(0-2). The preparation method comprises the following steps: achieving reduced pressure distillation of both the aniline and the o-phenetidine through a vacuum pump to obtain purified monomer aniline and monomer o-phenetidine; mixing the monomer aniline and the monomer o-phenetidine in proportion, adding deionized water into the mixture for dilution and then performing ultrasonography for half an hour; and dropping oxidant solution into the diluted mixture, pickling and leaching through dilute hydrochloric acid after reaction, then washing and leaching till the filtrate is colorless to obtain polymer powder, and drying the polymer powder in room temperature to obtain the polyaniline derivative. The invention has the benefits that on one hand, regulation and control of the electric conductivity of polyaniline are carried out in different orders of magnitudes, and on the other hand, the solubility of the polymer in different solvents is improved. The polyaniline derivative prepared by the method can be used for manufacturing electrochromic films with moderate electric conductivity, wide color change interval, long cycle time and high-speed response.
Owner:NORTHWESTERN POLYTECHNICAL UNIV

A kind of alkyl side chain phenyl boron fluoride complex and its preparation method and application

The invention discloses a preparation method of a series of piezochromic phenyl boron fluoride complexes with different alkyl chain lengths. The preparation method of the complexes comprises followingsteps: (1), a halogen-containing triphenylethylene compound and 4-acetylphenylboronic acid are subjected to a reaction, and tetraphenylethylene monoketone is synthesized; (2), tetraphenylethylene monoketone and esters are subjected to a reaction, and tetraphenylethylene beta-diketone compounds with different alkyl chain lengths are obtained; (3), the synthesized tetraphenylethylene beta-diketonecompounds with different alkyl chain lengths are complexed with boron trifluoride diethyl etherate respectively, and a series of boron fluoride complexes with different alkyl chain lengths are obtained. The boron fluoride complexes have excellent molecular aggregation induced fluorescence effect and excellent characteristics of piezochromism, wider wavelength shift range and the like, a new thinking is provided for researching color change mechanism of the piezochromic material by the aid of the synthesis of the material, and the material is expected to be widely applied in the fields of a brain tumor imaging technology, a near-infrared probe technology, photoelectric devices and the like.
Owner:HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY

A kind of magnetochromic photonic crystal material and preparation method thereof

The invention relates to a magnetic photochromic photonic crystal material and a preparation method thereof. The preparation method comprises the three steps of (1) preparing monodisperse silica microsphere colloid; (2) synthesizing a functional metal material; (3) preparing the magnetic photochromic photonic crystal material. The preparation method provided by the invention is simple. The photonic crystal material prepared by the method has a core-shell structure; in the structure, silica microspheres are taken as a core, and metal ions attached to the surfaces of the silica microspheres are taken as a shell. The metal ions have superparamagnetism, so that the photonic crystal material also has magnetic response performance. When an appropriate magnetic field is applied to the photonic crystal material, the volume locations or volumes of metallic particles are changed, so that the cluster lattice structure of photonic crystals changes, the position of a photonic forbidden band changes, and the colors of crystals are accordingly changed. Furthermore, the silica microspheres are uniform in structures and good in dispersity; therefore, the prepared nano photonic crystal material prepared by the method has the advantages of being uniform in crystal structure and rich in structural color.
Owner:MUDANJIANG MEDICAL UNIV

Fabrication method of solid electrolyte electrochromic flexible devices based on conductive polymers

The invention provides a solid electrolyte electrochromism flexible device preparation based on conductive polymer. The preparation method comprises steps of preparation of solid electrolyte, preparation of positive electrode material, preparation of negative electrode material and assembling of single-layered solid device. The solid electrolyte is self-designed by a laboratory, prepared in a simple way and has great environmental stability; the conductive polymer electrochromism material is advantaged by various structural types, wide color-changing ranges, high optical contrast ratio, great processing performance and fast response speed compared with inorganic and organic small molecules; the conductive polymer-based solid device thin film has electrochromic performance, thereby having wide application prospect in fields of displays, intelligent windows and electronic paper; the electrochromism material is advantaged by low driving voltage and color memory effect; and obvious electricity-saving effect can be achieved and passive luminescence is great for human eye protection.
Owner:ZHEJIANG UNIV OF TECH

Gel-like polymer electrolyte and method for preparing solid-state electrochromic devices based on conductive polymers

ActiveCN104698717BQuick color changeConfirmed electrochromic performanceNon-linear opticsElectrolysisPolymer science
The invention discloses a gelatinous polymer electrolyte and a preparation method for a solid electrochromism device based on a conductive polymer. The gelatinous polymer electrolyte has the advantages of good environment stability and high ionic conduction. The preparation method for the solid electrochromism device based on the conductive polymer comprises the following steps: using the working electrode deposited by a conductive polymer membrane with electrochromism performance as the positive electrode, uniformly coating the gelatinous polymer electrolyte on the surface of the conductive polymer membrane of the positive electrode material, after an electrolysis solvent A is partially volatilized and becomes thicker, taking a blank conductive substrate with the same material as the negative electrode, packaging and assembling the positive and negative electrode materials by using double faced adhesive tapes, and finally stilly placing the assembled device in the shade place for 1-4 days. The solid device based on the conductive polymer is easy to assemble and prepare, and has the electrochromism performance, so the solid device based on the conductive polymer has large application prospect in the fields, such as the display, the intelligent window, and the electronic paper.
Owner:ZHEJIANG UNIV OF TECH

A kind of stimuli-responsive color-changing functional coating and its preparation method and application

The invention belongs to the technical field of coatings, and specifically relates to a stimulus-responsive color-changing functional coating and its preparation method and application. The invention provides a stimulus-responsive color-changing functional coating, which includes the following preparation raw materials: epoxy resin, furanone pigments, amine curing agents and solvents. In the present invention, the furanone pigments are organic conjugated conductive molecules. The reaction between the amine curing agent and the furanone pigments forms cross-linked molecules containing hydrogen bonds. The cross-linked molecules can react under different environmental stimuli. It shows excellent electronic transition behavior, and the cross-linked molecule is unstable. It can produce electronic transitions with different characteristics through different stimulation conditions, giving the paint color-changing properties, making it have different colors under different environmental stimuli. Experimental results show that the stimulus-responsive color-changing functional coating of the present invention has thermochromic, ultraviolet photochromic and strong acid color-changing properties, with diverse color-changing stimulation conditions and a wide color-changing range.
Owner:SHAANXI SCI TECH UNIV +1

Preparation method of cadmium sulfide pectinate semiconductor micro/nano material

The invention relates to a cadmium sulfide pectinate semiconductor micro / nano material and a preparation method thereof, belonging to the technical field of photochromism. The preparation method comprises the following steps: putting cadmium sulfide and tin dioxide at the center of a quartz pipe of a pipe furnace, putting a gold-plated silicon wafer as a substrate into upstream or downstream the air flow of the quartz pipe of the pipe furnace, introducing carrier gas, heating, keeping the temperature for 1-3 hours, shutting down the pipe furnace, continuing introducing carrier gas, and cooling to room temperature to obtain the tin-doped cadmium sulfide pectinate micro / nano material. The tin-doped cadmium sulfide pectinate micro / nano material has the new application of color variations, and has the characteristics of low cost, simple preparation process and wide raw material sources. Compared with the existing photochromic material, the cadmium sulfide pectinate semiconductor micro / nano material is easier to implement, can implement color variations in real time, and has more color options, so that the photochromic range is more abundant. The invention can be widely applied to the fields of laser display, laser televisions, anti-counterfeiting materials and military wave-absorbing materials.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY

Low-toxicity heat-sensitive quantum dot material and preparation method thereof

InactiveCN103074058BClear color change with temperatureWide range of discolorationLuminescent compositionsChemical synthesisDispersity
The invention discloses a low-toxicity heat-sensitive quantum dot material and a preparation method thereof, and belongs to the technical field of semiconductor nanomaterial preparation. The preparation method comprises the steps as follows: by taking a Cu-doped InP quantum dot as a core, coating with a semiconductor ZnS isolation layer at first for isolating an inner material layer from an outer material layer, then coating with a semiconductor InP nanocrystal shell layer, and finally coating an outermost layer with a ZnS protection layer to form a Cu@InP / ZnS / CdSe / ZnS quantum dot. The quantum dot is highly sensitive to temperature, emits green light at normal temperature, red light at the temperature of 200 DEG C and different levels of yellow light at the intermediate temperature, and is stable in property, uniform in size and good in dispersity, and particles after the quantum dot is coated with the shell layer are in a perfect spherical shape; and as the quantum dot material prepared with the method is a non-cadmium semiconductor material, the quantum dot material has the advantage of low toxicity, accords with the green chemical synthesis concept, and is environment-friendly and strong in applicability.
Owner:JILIN UNIV

A method for driving flexible photonic crystals to change color based on shape memory alloy polymers

ActiveCN110146976BRealize the electrochromic effectAchieve uniaxial stretching functionOptical elementsPhotonic crystalChange color
The invention discloses a method of driving a flexible photonic crystal to change color based on a shape memory alloy polymer. With the shape memory alloy as a base material and a rigid structural member and a silicone rubber as composite materials, a driver is prepared; the flexible photonic crystal is then prepared and placed on the driver, DC is supplied to the driver to achieve deformation, and the flexible photonic crystal generates uniaxial stretching and color changing. The shape memory alloy polymer is used to drive the flexible photonic crystal to change color, the problems of insufficient flexibility and over high voltage of an electrochromic structure can be solved, the method is applicable to color changing occasions with high requirements on shape adaptability and use safety,and has important application potential in fields such as flexible display, anti-counterfeiting treatment, human assistance and smart cities.
Owner:XI AN JIAOTONG UNIV
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