75results about How to "Strong absorbance" patented technology

The present invention provides metal fine particles which have selective wavelength absorption characteristics in a wavelength region from visible light to near infrared light, and have sharp absorption characteristics, and influences little the surrounding wavelength, and therefore, they yield tones having high chroma. The present invention provides metal fine particles wherein an aspect ratio is in a range from 1.1 to 8.0, a maximum absorption wavelength in plasmon absorption is in a range from 400 nm to 1,200 nm, and an absorption coefficient at a peak position of the maximum absorption wavelength is in a range from 6,000 to 20,000 L / mol.cm (measurement concentration: 1.6x10-4 mol / L, and solvent:water).

The invention discloses an ultraviolet light detector of a lead-free double perovskite single crystal. The detector successively comprises a substrate, the lead-free double perovskite single crystal,an electrode, a silver colloid and a conductive gold wire from bottom to top. The lead-free double perovskite single crystal is formed by A, BI, BIII, and X. A molecular structural formula is A2BIBIIIX6, wherein the A is methylamine (MA) or Cs, the BI is Ag or Na, the BIII is Bi, Sb or In, and the X is Cl or I. A lead-free double perovskite single crystal material is selected from any one of Cs2AgInCl6, Cs2NaInCl6, MA2AgBiI6, and MA2AgSbI6. The type of double perovskite material solves a problem caused by biotoxicity of lead in traditional perovskite and has excellent photoelectric performance. Compared with a traditional perovskite material, the perovskite material of the invention has a high and rapid ultraviolet response. Good performance can be maintained in an air and humidity environment and good stability is achieved.

The invention discloses an environment-friendly latex paint and a preparation method thereof, and relates to the technical field of latex paint. The latex paint is prepared from the following raw materials in parts by weight: 85-105 parts of styrene-acrylic emulsion, 35-45 parts of nano-silica sol, 20-25 parts of diatom ooze, 10-15 parts of nano-TiO2, 10-15 parts of tourmaline anion powder, 10-15parts of glutinous rice glue, 7-8 parts of plant dehydrated filaments, 7-8 parts of antibacterial powder, 4-6 parts of active powder, 4-6 parts of essential oil components, 20-22 parts of an aid and 70-75 parts of deionized water. The latex paint has relatively powerful adhesive force, a paint film has light smell, low VOC and high adhesive force and is combined with the wall stably, peeling and bursting of the paint surface are not easily produced, and weather resistance of the latex paint is greatly improved.

A labeling reagent having a distinct Raman, or surface enhanced Raman, spectral signature is used for the control and analysis samples. The labeling reagents can be fluorescent dyes with different isotopic substituents, such as the substitution of some hydrogen atoms for deuterium atoms. Such labeling does not have any detectable effect on separation retention. Raman spectroscopy is used for detection purposes. By combining SERS and SERRS, a concentration ratio prediction error of less than 3% can be obtained over four orders of magnitude of total concentration with up to a factor of 3 concentration ratio range. The method is reliable, reproducible and more sensitive than methods based on absolute SERS / SERRS intensity correlations, with no internal standard, or using a different molecule (rather than an IEIS) as a SERS / SERRS internal standard.

The invention relates to a for detecting the entrapment rate of protein or polypeptide drugs in lipid vesicles, and belongs to the technical field of drug analysis. The method comprises the following steps: diluting a prepared protein or polypeptide wrapped lipid vesicle solution, taking the diluted lipid vesicle solution, adding a nonionic surfactant to carry out demulsification, taking the lipid vesicle solution before and after the demulsification, respectively adding a BCA reaction solution, and carrying out color development at a certain temperature and time; and reading the absorbance at 562 nm, and calculating the protein concentration and the entrapment rate according to a standard curve. The method uses a difference between the reaction rate of free proteins outside the lipid vesicles with a color developer and the reaction rate of the wrapped proteins in the lipid vesicles and the color developer to measure the entrapment rate of the lipid vesicle protein drugs without separating the free proteins, so the method has the advantages of convenience in operation, and good repeatability, solves the problems of tediousness and deviation in the measurement process of the entrapment rate of the lipid vesicle protein drugs, and provides an effective method and basis for relevant production application and research fields of the lipid vesicle protein drugs.

The invention discloses naphthalene tetracarboxylic diimide-naphtho dithiophene-containing copolymer and a preparation method as well as application thereof. The polymer is a compound which has a general formula shown in the specification, wherein R1 and R2 are selected from H, C1-C20 alkyl groups, phenyl groups or substituted phenyl groups with C1-C20 alkoxyl groups; R3 and R4 are selected form C1-C20 alkyl groups or alkoxyl groups; and n is an integer of 1-100. The naphthalene tetracarboxylic diimide-naphtho dithiophene-containing copolymer is prepared through Stille reaction with a simple reaction synthesis route and low technological requirements, and has the characteristics of high dissolubility, strong absorbency, superior charge transfer performance, capability of extending an absorption range to a near infrared region, capability of increasing utilization rate of sunlight, wide application and the like.

Disclosed is a perylenetetracarboxylic acid diimide organic semiconductive material represented by the following formula (I), which belongs to the field of photoelectric material. In formula (I), n is an integer of 1-100, R1, R2 or R3 is hydrogen, C1-C20 alkyl, C1-C20 alkoxyl, phenyl or alkoxyphenyl, R4 or R5 is C1-C20 alkyl, R6 or R7 is hydrogen, C1-C20 alkyl, C1-C20 alkoxyl or phenyl. The preparation method of said perylenetetracarboxylic acid diimide organic semiconductive material and the use thereof are also disclosed.

The invention, belonging to the field of photoelectron material, discloses a naphthalene tetracarboxylic acid diimide-dithiophene quinoxaline copolymer of formula (I), wherein, n represents an integer between 1 and 100, R1 and R2 represent hydrogen, C1 to C20 alkyl, C1 to C20 alkyloxy benzene, and R3 and R4 represent C1 to C20 alkyl or alkyloxy. The invention also provides a preparation method and applications of the naphthalene tetracarboxylic acid diimide-dithiophene quinoxaline copolymer. According to the invention, by forming an electron donor-acceptor structure, the band gap of the polymer is adjusted, and the absorption band edge is pushed to the infrared and near infrared region; and the modified naphthalene tetracarboxylic acid diimide has good dissolvability, strong absorbance, and wide absorption region that extends to the near infrared region, improves the utilization rate of sunlight, and has excellent charge transport performance.

The invention discloses a super-hydrophilic copper-based MOF photo-thermal fabric, a preparation method and application thereof, and belongs to the technical field of photo-thermal material preparation. The preparation method comprises the following steps: carrying out plasma etching treatment and deposition treatment by taking a polymer fabric film as a substrate to prepare a copper-coated polymer fabric film; and carrying out Cu(OH)2 nanowire growth treatment on the obtained copper-coated polymer fabric film, and then carrying out hydrothermal treatment to prepare the super-hydrophilic copper-based MOF photo-thermal material. According to the invention, the super-hydrophilic copper-based MOF photo-thermal material has excellent super-hydrophilicity and ultrahigh evaporation efficiency due to a unique metal organic porous carbon skeleton structure, so that a brand new photo-thermal conversion material is provided for a solar-driven interface seawater desalination technology; and the preparation process is simple, large-scale production can be achieved, and the preparation method can be well applied to the field of preparation and application of portable solar evaporators.

Relating to the technical field of latex paint, the invention discloses a latex paint with antibacterial function and a preparation method thereof. The latex paint comprises the following raw materials: 55-65 parts of a vinyl acetate-acrylic emulsion, 45-55 parts of a nanoparticle coating component, 35-40 parts of bamboo vinegar, 30-33 parts of nanometer polymer hollow microspheres, 25-27 parts of diatom mud, 20-23 parts of plant dehydrated fiber, 20-22 parts of lavender essential oil, 15-20 parts of assistant and 65-75 parts of deionized water. The latex paint provided by the invention has good antibacterial and bacteriostatic effect, is environment-friendly and safe, combines with wall stably, does not generate paint surface peeling, bursting or other phenomena easily, and greatly improves weather resistance.

The invention discloses a preparation method of a high-temperature-resistant light absorption coating. The preparation method comprises the following steps: (1) dispersing a nano carbon material, a surface modifier, a matting material, aromatic diamine and aromatic dianhydride in an organic solvent to prepare a composite suspension; (2) carrying out surface roughening treatment after the substrate is cleaned; and (3) depositing the composite suspension liquid obtained in the step (1) on the substrate treated in the step (2) in an aerial fog spraying or brushing manner, and heating and curing to obtain the high-temperature-resistant light absorption coating. According to the invention, by adjusting the types and proportions of the components in the composite suspension and combining with adaptive spraying process parameters, the components in the suspension can have a synergistic effect, so that the coating has a micro-nano porous structure and also has good mechanical properties. The high-temperature-resistant light absorption coating prepared by the method is good in binding force with a substrate and excellent in light absorption performance, and has a wide application prospect in the fields of optics, navigation and the like.

The invention relates to a perylene tetracarboxylic dianiline conjugated polymer which has high solubility and high film forming processing performance and can effectively utilize sunlight and a preparation method and application thereof. The perylene tetracarboxylic dianiline conjugated polymer utilizes high carrier mobility of thiophene [3,2-b] bithiophene and has the advantage of solution processibility. The thiophene [3,2-b] bithiophene is copolymerized with a narrow-band system monomer diazosulfide unit and perylene tetracarboxylic dianiline so as to regulate a band gap of the polymer. An absorption edge of the perylene tetracarboxylic dianiline conjugated polymer is pushed to an infrared and near-infrared region. Decorated perylene tetracarboxylic dianiline have high solubility, strong absorbance and wide adsorption range and can be extended to the near-infrared region. The sunlight utilization rate of the perylene tetracarboxylic dianiline conjugated polymer is improved. The perylene tetracarboxylic dianiline conjugated polymer has excellent charge transfer performance and has wide application prospect in the fields of an organic solar cell and the like.

The invention is applicable to the technical field of organic semiconductor materials, and provides a naphthalenetetracarboxylic acid diimide copolymer containing benzothiophene unit, and a preparation method and application thereof. The copolymer has the following structural formula. The benzothiophene unit and the naphthalenetetracarboxylic acid diimide unit are polymerized, so that the copolymer provided by the invention has the advantages of high solubility, strong absorbance, wide light absorption range and the like; the light absorption range can be extended to the near infrared region,so that the sunlight utilization ratio is enhanced; and meanwhile, the naphthalenetetracarboxylic acid diimide copolymer containing benzothiophene has excellent stability and charge transmission performance.

The invention discloses a reduced graphene oxide film photoelectric detector comprising a reduced graphene oxide film and a surface electrode. The reduced graphene oxide film is a substrate-containingreduced graphene oxide film or a substrate-free reduced graphene oxide film. The surface electrode is a symmetric interdigital electrode, and is prepared through metal vapor plating on the reduced graphene oxide film. The preparation process of the invention is very simple, and the reduced graphene oxide film photoelectric detector obtained by the method has the characteristics of high response rate, controllable area and wide spectrum detection at normal temperature and at atmospheric pressure. It is found that a self-supporting substrate-free reduced graphene oxide film can be obtained through a very simple substrate stripping method, and the self-supporting substrate-free reduced graphene oxide film photoelectric detector prepared by metal vapor plating has enhanced photoelectric response property and high light absorbance.

The invention which belongs to the optoelectronic material field discloses perylenetetracarboxylic diimide copolymers. The perylenetetracarboxylic diimide copolymers have a structural formula represented by formula (I). In the formula (I), n is an integer between 1 and 100; R1, R2 and R3 are hydrogen, C1-C20 alkyl, C1-C20 alkoxy, phenyl, or alkoxybenzene; R4 is C1-C20 alkyl; and R5 is hydrogen, C1-C20 alkyl, C1-C20 alkoxy, or phenyl. The invention also provides a preparation method and an application of the perylenetetracarboxylic diimide copolymers. The diphenyl silole unit-contained perylenetetracarboxylic diimide copolymers have the advantages of good dissolving performance, high carrier mobility, strong absorbance, wide light absorption range, and sunlight utilization rate improvement; and the preparation method which has the advantages of simple process and high yield is easy to operate and control.

The invention discloses emulsion paint which is formed by mixing an organic solvent, water, inorganic pigment, filling material, adjuvant and the like and comprises the following components by weight percent: 20%-35% of diatom ooze, 8% of dry film midewproof agent, 1%-3% of dispersing agent, 0.5% of wetting agent, 0.3% of defoaming agent, 0.2% of wetting agent, 10%-15% of isopropanol, 5%-8% of zinc white, 2.5%-3.8% of adhesive and the balance of water. The preparation process of the diatom ooze emulsion paint is as follows: pouring water in a container and starting to stir; successively adding organic solvent, inorganic pigment, filling material and adjuvant in the process of stirring, then heating and fully and evenly stirring; and when the mixture is heated to 60 DEG C, adding the diatom ooze and then continuously stirring for 20 minutes, and then adding the adhesive to stir until all the materials are fully mixed. The effect is as follows: the diatom ooze emulsion paint is capable of clearing peculiar smell, maintaining air fresh, humidifying air, self-cleaning wall surface and preventing inflaming, is soft in color and is has small possibility of generating eyestrain, thereby reducing myopia rate.

The embodiment of the invention relates to an A-A type conjugated polymer based on isoindigo-blue and a preparation method and application thereof.The structural general formula of the A-A type conjugated polymer based on isoindigo-blue is shown in the description, wherein Ar is an aromatic compound fragment, and R is alkane of C1-C32, alkenyl of C2-C32 and alkyne or ether oxygen or alkyl chain amines or sulfydryl of C2-C32; n is an integer larger than or equal to 4 and smaller than or equal to 100.According to the A-A type conjugated polymer based on isoindigo-blue, the solubility is good, the light absorbance is strong, the absorption range is wide, the sunshine utilization rate is high, the LUMO energy level is low, the A-A type conjugated polymer can replace fullerene and derivatives thereof as an acceptor material for preparing a full-polymer organic light detector and an organic solar cell.

The invention discloses an organic semiconductor material based on fluorene, anthracene and quinoxaline, a preparation method thereof and an application thereof. The organic semiconductor material has a structure represented by formula (P). In the formula (P), n is an integer greater than 1 and equal to or less than 200, and m is an integer equal to or greater than 1 and equal to or less than 20;x and y are positive real numbers, and the value of x+y is 1; R1 and R2 are hydrogen, fluorine, cyan, C1-C40 alkyl, alkoxy, aryl, or heteroaryl respectively; and R3 is hydrogen, phenyl, C1-C20 alkyl,or C1-C40 arylalkoxy. The organic semiconductor material based on fluorene, anthracene and quinoxaline of the invention, which has a high carrier mobility, a strong absorbance, and a wide light absorption range, allows the sunlight utilization rate to be improved; and the preparation method of the organic semiconductor material, which has the advantages of simple technology and high yield, is easy to operate and control.

The invention relates to an outdoor decoration Zisha coating material for building, and a preparation method thereof, particularly to a building coating material and a preparation method thereof, wherein the building coating material comprises, by weight, 7.0% of a dispersion water, 0.2% of a thickener EBS-481F, 0.1% of a PH value regulator RF-86, 1.0% of a cosolvent ethylene glycol, 0.8% of a film forming aid TEXANOL, 0.5% of a dispersant RT-8027, 0.1% of a fungicide 623, 13.7% of a lacquer emulsion PX-7015, the material obtained by diluting 0.1% of a thickener 730 with 0.5% of water, 20-40% of Zisha clay with a particle size of 80-120 mesh, 10-30% of Zisha clay with a particle size of 40-80 mesh, 5.0-7.5% of Zisha clay with a particle size of 20-40 mesh, and 1.0% of a waterproof agent R-75. The preparation method comprises: breaking Zisha ore, firing, crushing, screening to achieve a particle size of 80-325 mesh, and mixing to obtain the product. According to the present invention, the prepared Zisha coating material has significant comprehensive effects, particularly such as air purification, formaldehyde removing, external body thermal insulation enhancing, ultraviolet radiation preventing, natural color achieving, wall crack preventing.

The invention discloses a bifunctional probe for identifying iron ions and fluoride ions, a preparation and application of the bifunctional probe. The bifunctional probe is of a structure representedby a formula I described in the descriptions of the invention. The synthesis method of the bifunctional probe of the invention is simple and enables a high yield. The bifunctional probe can realize the detection of iron ions and fluoride ions and is reversible in the identification of the fluoride ions.

The invention discloses a preparation method of a solar light absorption coating. The method comprises the following steps of mixing Fe(NO3)3, Ni(NO3)2 and Co(NO3)2, dissolving in absolute ethyl alcohol, and performing stirring at constant temperature of 70 DEG C to prepare sol; adding polyethylene glycol-400 into the sol, and then spraying the sol to the surface of a polished substrate through aspray gun; and drying the surface film layer of the substrate at 70 DEG C, putting the substrate into a muffle furnace, heating to 500 DEG C at a speed of 5 DEG C / min, keeping the temperature for 1 hour, calcining, and cooling to room temperature along with the furnace to form the solar light absorption coating. The preparation method provided by the invention is convenient and simple in process,has no special requirements on the surface of the substrate, can be applied to a complex surface, further saves the preparation cost and reduces the preparation difficulty; and the prepared light absorption coating has good high temperature resistance, and still keeps good absorbance after continuously working at 500 DEG C for 24 hours.

The invention relates to a photosensitive composition excellent in light absorption and suitable for forming a fine pattern, in particular to a photosensitive composition, a cured material thereof and a dry film. Through a disposable exposure method for performing exposure through an ultraviolet lamp and a light mask or a direct description method utilizing light from an ultraviolet lamp or short-wavelength lasers, the photosensitive composition which is used for forming the cured part of the expected pattern and applies the uncured part of the expected pattern to developing through an alkaline aqueous solution is formed. The dry film is obtained by coating a carrier film with the composition and then performing drying. Preferentially, when the drying film coating thickness of the photosensitive composition before exposure is 25 micrometers, the light absorbency for light with the wavelength of 355 nm-375 nm is 1.2-1.8, and the light absorbency for light with the wavelength of 405 nm is above 0.6.

The invention discloses a preparation method of blue niobium pentoxide. The preparation method comprises the following steps: taking an amorphous niobium oxide precursor, heating to 500-600 DEG C, andcalcining for 2-4 h to obtain white niobium pentoxide; and adding the white niobium pentoxide into an aqueous hydrochloric acid solution, performing ultrasonic dispersion, then adding metal powder, stirring for 5 min or above, centrifuging, and taking, washing and drying the obtained precipitate to obtain the blue niobium pentoxide. The invention further discloses the blue niobium pentoxide is prepared according to the method. The invention also discloses an application of the blue niobium pentoxide in preparation of a photothermal conversion material. The method is simple in process, free ofdangerous reagents, low in raw material cost, short in production period and capable of achieving industrial large-scale rapid production; the blue niobium pentoxide has a strong absorption effect onvisible light and near-infrared light; and the blue niobium pentoxide has good dispersibility and stability in water, has biocompatibility, and has a wide application prospect in the biomedical fields of photothermal therapy and the like.

The invention discloses fluorine-doped titanium dioxide nano powder with a transparent function and a near-infrared shielding function. The preparation method comprises the following steps: mixing oleylamine, oleic acid, 1-octadecene, octadecanol, a titanium source and a fluorine source, heating and uniformly stirring in a nitrogen atmosphere, degassing, raising the temperature to 260-320 DEG C, and keeping the temperature for 0.5-2 hours; and cooling, washing and drying the reaction product. After the fluorine-doped titanium dioxide nano powder forms a film, the light transmittance is greater than 90%, and the near-infrared rejection rate is 17%-43%. According to the invention, titanium dioxide has near-infrared barrier property on the premise of ensuring high visible light transmittance, the absorbance of the product in a near-infrared light area is enhanced along with the increase of the use amount of the fluorine source, and the absorption of the titanium dioxide nano-powder to near-infrared light can be changed by adjusting the F-doping amount; the prepared transparent heat-insulating film has high transmittance in a visible light region and good barrier property in a near-infrared light region, and has good application value in the aspect of transparent heat-insulating coatings.

The invention discloses a method for detecting tobacco leaf reducing sugar. The method comprises the following steps: manufacturing a reducing sugar standard curve: adding a certain quantity of picric acid into glucose solutions with different concentrations, performing a heating reaction on sodium carbonate in boiled water for 10 min, detecting the light absorption values at 285 nm, and manufacturing the standard curve according to the concentrations and the light absorption values; and extracting soluble reducing sugars in tobacco leaves with boiled water, then adding a certain quantity of picric acid, performing a heating reaction on sodium carbonate in boiled water for 10 min to obtain a tobacco leaf reducing sugar to-be-detected solution, detecting the light absorption values at 285 nm, and calculating the content of the tobacco leaf reducing sugar according to the standard curve. The method has the advantages that the detection result is reliable, the repeatability is high, the operation is simple and convenient, popularization is convenient, and the method can be not only used for detecting the tobacco leaf reducing sugar but also widely applied to preliminary determination of other soluble reducing sugar.

The invention discloses a perylene tetracarboxylic diimide copolymer containing a dithieno quinoxaline unit as well as a preparation method and application thereof. The copolymer is shown in the specification. The preparation method comprises adding a perylene tetracarboxylic diimide dibromide and a 6,9-bis(tributyl tin)-dithieno[3,2-f:2',3'-h]quinoxaline derivative in an organic solvent, adding a catalyst, carrying out Stille coupling reaction at the temperature of 50-120 DEG C for 24-72 hours, and refining to obtain the copolymer. The copolymer disclosed by the invention can be applied to manufacture of polymer solar cell devices, organic field effect transistors, organic electroluminescent devices, organic light storage devices, organic nonlinear materials or organic laser devices. Thecopolymer disclosed by the invention has the advantages of good solubility, strong light absorbency and excellent charge transfer performance, the absorption range of the copolymer can extend to a near infrared region, and the sunlight utilization rate can be increased; and the preparation method has a simple synthesis route and a low process requirement.

Belonging to the technical field of nano and photocatalysis, the invention discloses a method for preparation of nano-CoFe1.95Y0.05O4 powder and catalytic degradation of methyl orange. A sol-gel method is employed to prepare the target product by controlling the amount of Y(NO3)3.6H2O, the baking temperature and the like, X-ray diffraction characterization finds that the XRD spectrum of the sample is completely consistent with PDF card (22-1806); TEM characterizes that the particle size is in the range of 16-26nm; diffuse reflection spectrum determination indicates that the CoFe1.95Y0.05O4 band gap is 1.71ev wide, and the ultraviolet region and visible region have strong absorption. A CoFe1.95Y0.05O4-H2O2-pH4 composite system is designed to study the methyl orange solution photocatalytic reaction, and experiments prove that: after 500w xenon lamp illumination on the solution for 2h, the methyl orange degradation rate is close to 100%. The nanocrystals synthesized by the method provided by the invention have the advantages of strong magnetism, high efficiency and complete photocatalytic degradation, etc. At the same time, the cost of the required raw materials is low, and the process is simple, can realize zero emission and has low energy consumption, thus being easy for industrial production.

Indolestyryl compounds and use thereof for a high density recording media and method for fabricating the same. The indolestyryl compounds exhibit strong absorbance in the visible light region (400˜700 nm) of the spectrum, resistance to heat and light, high light sensitivity, and excellent solubility, resulting from their special chemical configuration. Furthermore, the indolestyryl compounds can be used as recording layer materials in high density recording media for matching a reading laser wavelength and enhancing the reflective index and carrier-to-noise ratio (CNR) of the high density recording media. Accordingly, the recording sensitivity and the readout characteristics of high density recording media comprising the indolestyryl compound according to the present invention can be improved.

The invention relates to building paint and a preparation method thereof, in particular to a building interior decoration purple sand paint and a preparation method thereof. The paint is composed of the following ingredients by weight percent: 61.40% of silicon oxide, 20.16% of aluminum oxide, 7.74% of iron oxide, 0.64% of calcium oxide, 0.07% of sodium oxide, 1.31% of potassium oxide, 1.46% of magnesium oxide, 1.10% of titanium oxide and 6.12% of ignition loss. The preparation method comprises the following steps: firstly, firing purple sand ore for 6 h after being naturally weathered for 6 months; crushing fired slaked purple sand material, screening through sieves, dividing the screened material into four paint raw materials, namely 80-mesh paint raw material, 100-mesh paint raw material, 150-mesh paint raw material and 200-mesh paint raw material, for standby application, and uniformly stirring according to the ratio that 80 kg of redispersible latex powder is added into 1 ton of purple sand slaked powder. The purple sand paint has an obvious comprehensive effect, particularly, can purify air, eliminate formaldehyde and peculiar smell and sterilize, facilitates human body microcirculation regulation, and is scientific and reasonable in preparation process and excellent in conditions.

The invention belongs to the field of an optoelectronic material, and discloses a fluorene, anthracene and 2-thiophene thiazide-containing copolymer shown in Formula (P). In the formula, n is an integer between 1 and 100, m is an integer between 1 and 20, x and y are positive real numbers, and the sum of x and y is 1; R1 and R2 are respectively hydrogen, fluorine, cyano, alkyl with a C1-C40 straight or branched chain, alkoxy with a C1-C40 straight or branched chain, aryl or heteroaryl; and R3 and R4 are hydrogen and C1-C20 alkyl. The invention also provides a preparation method and an application of the fluorene, anthracene and 2-thiophene thiazide-containing copolymer. The fluorene, anthracene and 2-thiophene thiazide-containing copolymer has a high carrier mobility rate, high light absorbance and broad scope of light absorption, the rate of utilization of sunlight can be increased, and the process of the preparation method is simple, the yield is high, and the operation and control can be facilitated.