65results about How to "Reduce fluorescence quenching" patented technology

The invention discloses a composite hole transport layer with a multi-layer periodic doping structure, an LED device structure and application and preparation method of the LED device structure. By doping a metal oxide material in a hole organic transport layer of a quantum-dot light emitting device, the hole transport layer (HTL) taking the doping organic layer as a structural unit and with multi-layer periodic doping is fabricated, the hole injection capability of the device is remarkably improved, so that the carrier injection balance in the device is improved. Meanwhile, the influence of the doping proportion of the metal oxide doping material in the HTL on the light emitting property of the device is symmetrically researched. The structure is not limited to a quantum-dot LED, and the device structure can be implanted to other types of photoelectric devices.

A hydrotalcite composite luminescent material with rhodamine intercalation, which pertains to abio-organic composite luminescent material. The process is preparing solution A with mole ratio of bivalence and tervalence cation M2+ / M3+=2.0-4.0; adding laser dye sulphonated rhodamine and sodium salt of dodecylbenzene sulfonic acid into mixed solution of ethanol and water and fully dissolving to obtain solution of sulphonated rhodamine and dodecyl benzene sulfone acid group containing anion with negative charge B; mixing solution A, B into solution C, preparing NaOH solution; communicating solution C and NaOH solution into full-back-liquid mixing membrane reactor to react, mixing to obtain red slurry, introducing the red slurry into hydrothermal kettle, reacting, absterging by CO2, de-ionized water and absolute ethyl alcohol and centrifugally separating, vacuum drying. Then hydrotalcite system with co-intercalation of suphonated rhodamine and dodecyl sulfone acid group is obtained. Advantages of the invention are that dye molecular is immobilized, and fluorescence quenching caused by dye aggregation is reduced.

The invention discloses a composite luminescent film containing rare earth polyacid and brucite and a preparation method thereof and belongs to the technical field of the preparation of inorganic composite luminescent films. The preparation method comprises the following steps of: preparing brucite colloidal solution stripped by using a formamide solvent; confecting rare earth polyacid-containingsolution; and performing a plurality of alternate assemblies in two types of solution by using a hydrophilically-treated substrate to obtain a composite multilayer luminescent film containing the rare earth polyacid and the brucite. In the preparation method, sequential assembly of rare earth polyacid-containing functional molecules and brucite nanosheets is realized for the first time, and the application field of a material containing the rare earth polyacid and the brucite is expanded. The thickness of the obtained film is accurately controllable in nanoscale. Simultaneously, the space limiting function of the brucite and coaction between a host and a guest are utilized, so that the immobilization of luminescent molecules containing the rare earth polyacid is realized, the controllableluminous intensity of the film is realized by changing assembly times, the thermal stability of the film is enhanced effectively, and fluorescent quenching caused by aggregation is reduced.

The invention provides an inorganic metal compound, a composition comprising the inorganic metal compound, a device, apparatuses, and a manufacturing method for the device. The inorganic metal compound is used for a first current carrier transport layer of a photoelectric device; the inorganic metal compound is a chelate which is obtained from inorganic semiconductor nanocrystals and a chelating agent through a chelating reaction; and first current carriers comprise electrons or holes. By adoption of the inorganic metal compound, material stability can be improved; the chelate with a stable structure is formed by virtue of matching of the chelating agent and active sites of the inorganic semiconductor nanocrystals in the chelating reaction; therefore, by lowering or inactivating the activity of the active sites on the surfaces of the inorganic semiconductor nanocrystals, the capability of accepting external electrons or holes of the active sites is lowered; the electrons or holes of a quantum dot light emitting layer cannot be extracted by the active sites easily; fluorescence quenching of the quantum dots is reduced; the problem of fluorescence quenching of a quantum dot light emitting screen easily caused by the existing inorganic current carrier transport material can be solved; and the light emitting efficiency of the photoelectric device is improved.

The invention relates to a microcapsule with fluorescent tracing and reduction responsive drug release functions and its preparation method. A drug-loading microcapsule using a cross-linking film containing graphene quantum dots as a capsule wall and an oil phase loading a hydrophobic drug as a core is formed by: performing ultrasonic radiation on an aqueous solution obtained by modification with an organic polymer or biopolymer containing both sulfhydryl groups and amino groups and on the oil phase loading the hydrophobic drug. The graphene quantum dots are evenly distributed on the capsule wall of the microcapsule and are modified with the organic polymer or biopolymer, spacing among the graphene quantum dots is enlarged, and fluorescent tracing performance of the microcapsule during drug delivery is guaranteed; the formed capsule wall containing the graphene quantum dots encapsulates and protects a drug; drug release is effectively controlled by using reduction responsiveness of disulfide bonds; the preparation method is quick and simple and efficient and environment-friendly, and products are pure and nontoxic.

The embodiment of the invention discloses an organic light-emitting display device, a manufacturing method thereof and organic light-emitting display equipment. The organic light-emitting display device comprises a first electrode and a second electrode which are arranged oppositely; a first light-emitting layer and a second light-emitting layer are arranged between the first electrode and the second electrode; the first light-emitting layer is arranged close to the first electrode and is prepared from the composing materials including a first subject material and a first object material; the second light-emitting layer is arranged close to the second electrode and is prepared from the component materials including a second subject material and a heat activation delay fluorescent material. In the embodiment of the invention, the heat activation delay fluorescent material can reduce electron injection obstruction, and an exciplex is difficult to generate; the first light-emitting layer and the second light-emitting layer are arranged, so that a light-emitting center position can be flexibly regulated, the efficiency of the device is improved, and the service life of the device is prolonged; and in addition, the strongest radiation wavelength of the device is fixed after the light-emitting center position is determined, so that the problem that the light color, the brightness and the color error are changed because of offset of the light-emitting center position, is solved.

The invention discloses a spirobifluorene fluorescence probe which is 2,7-di(benzimidazole) spirobifluorene. According to the invention, the structural formula of a product is shown in a formula (I). The preparation method of the spirobifluorene fluorescence probe comprises the following steps: carrying out coupling reaction, bromination, Grignard reaction, dehydration cyclization reaction and oxidization reaction on parabromotoluene which is used as a raw material so as to obtain a spirobifluorene dialdehyde compound; and reacting the spirobifluorene dialdehyde compound with o-phenylenediamine to obtain the compound (I). According to the invention, the raw material is cheap and available, the synthesis route is simple, the yield is high, and the preparation method is suitable for large-scale production. Because the three-dimensional rigid structure of spirobifluorene is introduced, the compound (I) has high fluorescence quantum yield and fluorescence intensity; the compound (I) has high sensitivity and good selectivity when being used for silver ion detection, detection limit of naked eye can reach 10<-5>M, and the detection limit of an instrument can reach 10<-6>M; the response time of the compound (I) on the silver ion is less than 2 seconds; and simultaneously, the compound (I) is a pH fluorescence probe having wide response range and has a good application prospect.

The invention discloses a luminous nano composite fiber film containing rare earth polyacid and a method for preparing the luminous nano composite fiber film, and belongs to the field of inorganic-organic composite materials. The method includes the steps that a polyacrylonitrile solution is prepared, the rare earth polyacid is added to the solution, and the rare earth polyacid / polyacrylonitrile luminous nano composite fiber film is prepared by means of the electrostatic spinning technology. The method achieves the fact that rare earth polyacid functional molecules and water-insoluble polymer polyacrylonitrile form the nano composite fiber film by means of electrostatic spinning for the first time, and expands the application field of the rare earth polyacid and polymer materials. The thickness of the prepared fiber film is controllable in a micron grade, meanwhile the space confinement function in filaments of nano composite fibers is used, and solidification of rare earth polyacid luminescent molecules is achieved. The luminescence intensity of the fiber film can be controlled according to changes of spinning time, and the fiber film is strong in operability. The fiber film can serve as a pH sensitive gas sensing material, and is applied in novel photoelectric equipment.

The invention provides an organic electroluminescent material and an organic light-emitting device, and belongs to the technical field of organic electroluminescent material materials. A compound of the organic electroluminescent material has a three-dimensional structure of triptycene, and can solve the technical problems of poor light-emitting performances such as low light-emitting efficiency and relatively high drive voltage of the organic electroluminescent material in the prior art. Compared with the prior art, the organic electroluminescent material and the organic light-emitting device have the advantages that: light-emitting efficiency is as high as 15.0 cd / A, drive voltage is as low as 4.7 V, and the organic electroluminescent material is an excellent OLED material.

The invention discloses an indirect background fluorescence colloidal gold immunochromatographic test strip based on double-labeled signal amplification and application thereof. The test strip comprises five parts, namely a PVC plastic back plate paved with fluorescence, a PVC bottom plate, a nitrocellulose membrane, a sample pad and absorbent paper. The invention also discloses a double-labeled colloidal gold probe, the double-labeled colloidal gold probe is composed of a gold nanoparticle labeled biotinylated anti-target object antibody and gold nanoparticle labeled streptavidin, and signalamplification is realized by using superstrong affinity between biotin-streptavidin molecules. According to the fluorescent colloidal gold immunochromatography test strip disclosed by the invention, asample is pretreated by utilizing the immunomagnetic microspheres before detection, and an enriched target object can be efficiently and rapidly separated in an external magnetic field. The test strip has the advantages of good stability, high sensitivity and no matrix interference, can realize rapid qualitative or quantitative detection of the sample, is simple in operation steps, strong in controllability, and has good application prospects.

A method for detecting microcystin LR based on the fluorescence resonance energy transfer of a shell-core type up-conversion material and molybdenum disulfide is used for detecting the microcystin LR (MC-LR) in a practical water sample. The shell-core type up-conversion material (NaYF4:Yb, Tm@NaYF4:Yb) is prepared to improve the fluorescence intensity. After the up-conversion material is connected with the nucleic acid adaptor of the MC-LR, nucleic acid bases is adsorbed to the bottom surface of the molybdenum disulfide through Van der Waals force, the fluorescence resonance energy transfer occurs between the up-conversion material and molybdenum disulfide, and fluorescence is quenched. When the MC-LR exists in the detection process, the MC-LR specifically binds to the adaptor of the MC-LR, the conformation of the adaptor is changed, and the adaptor is separated from the bottom surface of the molybdenum disulfide to recover the fluorescence. The fluorescence intensity at 361 nm is monitored, the MC-LR is quantitatively detected, the linear range is 0.01-50 ng / ml, and the detection limit is 0.002 ng / ml. The method used for detecting the MC-LR has the advantages of high sensitivity, high specificity and good stability. A result is accurate and reliable when the method is used for detecting tap water and Taihu Lake water.

The invention discloses dual-mode imaging nano-micelle which comprises a CT (Computed tomography) contrast medium, red fluorescent molecules NPAPF (N-(2-naphthyl)phenylamino)phenyl)-fumaronitrile) and a carrying material for carrying the CT contrast medium and the NPAPF into the dual-mode imaging nano-micelle. The invention further discloses a preparation method and an application of the dual-mode imaging nano-micelle. The dual-mode imaging nano-micelle combines fluorescent imaging and CT imaging, achieves targeted dual-mode imaging of living tumor and organs and meanwhile is long in action time, intensive in detection signal and very small in toxicity.

The invention belongs to the technical field of organic photoelectric materials, and particularly relates to an organic photoelectric material as well as a preparation method and application thereof.The organic photoelectric material comprises a molecular structure as shown in formula I: (shown in the description), in the formula I, R1 and R2 are respectively one of C6-C18 aryl group or C6-C18 aromatic heterocyclic group containing at least one of O, S and N. The organic photoelectric material can be effectively applied to an organic electroluminescence device, and has good luminescence performance, an asymmetric diarylamine structure facilitates the hole transportation, by introducing a butterfly-shaped group, the organic photoelectric material has good rigidness and space three-dimensional characteristics, and the stability and film forming performance of the organic photoelectric material can be improved.

The invention belongs to the technical field of organic synthesis, in particular to a pyrene type asymmetrical disc-like luminous compound and a preparation method thereof. The general structural formula of the compound is shown in the specifications, wherein R1 is shown in the specifications, and n is an integer ranging from 4 to 20; and R2 is shown in the specifications, and n is an integer ranging from 4 to 20. The preparation method of the compound comprises a pyrene Friedel-Crafts acylation reaction, an intermediate product bromination reaction, a Sonogashira coupling reaction, a trimethyl silicane removing reaction and a bromination chain linking reaction. The pyrene type asymmetrical disc-like luminous compound prepared with the method takes a disc as an axis and an asymmetrical bar-shaped molecular chain as an axis, has very high fluorescence and luminous efficiency, and has wide application.

The invention discloses a small molecular blue-light emitting material and a preparation method thereof. The small molecular blue-light emitting material is a monomer and supermolecular annular compound prepared by taking 9,10-di(2,4-dimethoxyl phenyl) anthracene as a parent and is prepared by the following two reaction steps: (1) preparing 9,10-di(2,4-dimethoxyl phenyl) anthracene; and (2) preparing 9,10-di(2,4-dimethoxyl phenyl) anthracene ring dimer, trimer and tetramer. The 9,10-di(2,4-dimethoxyl phenyl) anthracene in the deep blue-light emitting material synthesized in the invention is connected through methylene to form the ring dimer, trimer and tetramer material molecules, so that the steric hindrance is increased in an anthracene framework of a plane structure. Gathering of molecular chromophores can be more effectively blocked, the interaction among molecules is reduced, and therefore, the light-emitting property of the material is improved obviously.

The invention relates to a GDF15 rapid quantitative fluorescent microsphere detection device and a preparation method thereof, and belongs to the field of medical detection. The device is prepared byadhering a nitrocellulose membrane with a solid phase containing a GDF15 antibody and a goat-anti-mouse IgG polyclonal antibody, glass fiber adsorbed with a fluorescent microsphere labeled GDF15 antibody, a sample pad, absorbent paper and other auxiliary materials. The preparation method comprises the following steps: pretreating a nitrocellulose membrane by adopting a polyethylene glycol glyceroltreatment solution; combining a GDF15 antibody firstly with oleic acid modified zinc sulfide nanoparticles and then adsorbing to a nitrocellulose membrane; and preparing the proper buffer solution and the sample pad treatment solution. The reaction sensitivity is effectively improved on the basis of ensuring complete release of the immunofluorescence microsphere, and under the same threshold value, the dosage of the immunofluorescence microsphere can be reduced, the cost is saved, and the complexity of production operation is not increased. The test paper is high in sensitivity, strong in specificity, simple and convenient to operate, time-saving and strong in practicability.

The invention discloses a multi-layer planar waveguide structure of a laser and a preparation method of a multi-wavelength organic laser. The multi-layer planar waveguide structure is formed by cascade connection of at least two planar waveguide structure units; an intermediate modulation layer is arranged between the adjacent two planar waveguide structure units and is formed by a low-refractive-index super-thick transparent layer, and a high-reflectivity ultra-thin metal layer; and the intermediate modulation layer and a laser dye layer adjacent to the intermediate modulation layer form a planar waveguide unit. According to the invention, with introduction of the high-reflectivity metal layer, spontaneous radiation light is amplified and limited into the dye active layer; and the low-refractive-index super-thick transparent layer is added into the dye active layer and the metal modulation layer to reduce fluorescence quenching, and pumping energy is centralized into an optical waveguide. In order to obtain multi-waveband high-gain spontaneous radiation light amplification, the intermediate modulation layer is arranged to enable the ASE to be limited in the dye active layer; and under simulation of optical pumping, multi-waveband low-threshold laser can be obtained.

The invention relates to 9,10-bis(2,4-dimethoxybiphenyl)anthracene, a cyclic trimeric compound thereof, and a preparation method and application of the trimeric compound. The 9,10-bis(2,4-dimethoxybiphenyl)anthracene in a blue-light emitting material molecule synthesized by the invention is linked by methylene to form a cyclic trimeric blue-light emitting material molecule. A 9,10-bis(2,4-dimethoxybiphenyl)anthracene monomer introduces four methoxy groups into a molecular skeleton, so that the steric hindrance of the material molecule on the anthracene skeleton of a plane structure is increased, aggregation between molecular chromophores can be prevented more effectively, and interaction between molecules is reduced. In addition, a macrocycle has a unique twisted structure and three-dimensional characteristics, so that the fluorescence quenching effect at relatively high dosage concentration is reduced to a relatively great extent, and the luminous efficiency of materials is significantly increased, thereby significantly improving the luminescence properties of the materials.

The invention discloses a sulfonated polyphenylene ethylene and hydrotalcite composite luminescent ultrathin membrane and a preparation method thereof, which belong to the technical field of organic-inorganic composite luminescent materials. The preparation method comprises the following steps: preparing a hydrotalcite colloidal solution peeled off by a formamide solvent and a dilute aqueous solution of sulfonated polyphenylene ethylene respectively; and performing alternate assembly in the two solutions by using a substrate with negative charges after treatment so as to obtain the sulfonated polyphenylene ethylene and hydrotalcite composite luminescent ultrathin membrane. The prepared ultrathin membrane is formed by the alternate assembly of organic luminescent polymer anions and inorganic hydrotalcite, the preparation process is simple, the ultrathin membrane can be controlled precisely at nanometer scale; and simultaneously, because the two-dimensional confinement effect of a hydrotalcite rigid plywood and the host-guest interaction of the polymer anions, the immobilization of the luminescent polymer sulfonated polyphenylene ethylene is achieved, the photo-thermal stability of the ultrathin membrane is improved effectively, and the fluorescence quenching caused by the aggregation of the polymer luminescent thin membrane is reduced.

The invention discloses an organic electroluminescent material, a preparation method and an application thereof, and belongs to the technical field of organic electroluminescence. The organic electroluminescent material has the molecular structure represented as follows, wherein A is void or is a six-membered carbon ring, X is O, S or CMe2, Ar1 and Ar2 are substituted or non-substituted aryl group and substituted or non-substituted hetero-aryl group. The invention also discloses the preparation method and the application of the organic electroluminescent material. The organic electroluminescent material has good carrier transportation efficiency and thermodynamic stability, excellent film-forming property, proper molecular energy level and high luminescence efficiency, can be used as a blue light doping material and is applied in the field of organic electroluminescence.

The invention discloses novel spirobifluorene compound 2-methyl-7-benzimidazolyl spirobifluorene. The method for preparing the novel spirobifluorene compound comprises the following steps of performing coupling reaction on parabromotoluene serving as a raw material, and performing bromination, grignard reaction, dehydration cyclization and oxidizing reaction to obtain the 2-methyl-7-formacyl spirobifluorene, and reacting the 2-methyl-7-formacyl spirobifluorene with o-phenylendiamine to obtain the compound (I). The method and the compound have the advantages that raw materials are low in price and readily-available, the synthetic route is simple, the yield is high, and the method can be applied to large-scale production; because a three-dimensional rigid structure of spirobifluorene is adopted, the compound has a high yield of fluorescent quantum and fluorescence intensity; the compound has high thermal stability and high solubility; the compound can be applied to the field of electroluminescence, and when the compound is used as a luminescent layer to prepare an electroluminescent device, pure white light can be obtained; and when the compound is applied to a fluorescent ion probe, the probe has high sensitivity, can make quick response to a pH value of a solution, is a pH probe with a quite wide response range and has quite good application prospect.

The invention provides a preparation method of anthracene-doped polyphenyl acetylene-graphene OLED photoelectric particles. The method comprises grinding anthracene groups and polyphenyl acetylene under frozen conditions, during the grinding process, introducing graphene conductive agent, taking graphene as an external skeleton to form a non-coplanar scroll structure to reduce fluorescence quenching. Therefore, the high fluorescence quantum efficiency can be kept and meanwhile, the performance of the polyphenyl acetylene can be effectively regulated. The preparation method of the an anthracene-doped polyphenyl acetylene-graphene OLED photoelectric particles overcomes the intrinsic defect of crystallization proneness of small molecules such as anthracene serving as light emitting units in the prior art, increases the service life and the thermal stability of devices and is simple in synthetic processes of composite materials, low in cost of raw materials and capable of meeting the requirements of industrialized development.

The invention relates to a rapid quantitative fluorescence detection device for 3-deoxyfructose and a preparation method thereof, and belongs to the field of medical detection. The device is preparedby adhering a nitrocellulose membrane with a solid phase containing 3-deoxyfructose-carrier protein and a goat-anti-mouse IgG polyclonal antibody, glass fiber adsorbed with an immunofluorescence microsphere labeled 3-deoxyfructose antibody, a sample pad, absorbent paper and other auxiliary materials. The preparation method comprises the following steps: pretreating a nitrocellulose membrane by adopting a polyethylene glycol glycerol treatment solution; firstly combining carrier protein-3-deoxyfructose with oleic acid modified zinc sulfide nanoparticles, and then adsorbing onto a nitrocellulosemembrane; and preparing the proper buffer solution and the sample pad treatment solution. The reaction sensitivity is effectively improved on the basis of ensuring complete release of the immunofluorescence microsphere, and under the same threshold value, the dosage of the immunofluorescence microsphere can be reduced, the cost is saved, and the complexity of production operation is not increased. The test paper is high in sensitivity, strong in specificity, simple and convenient to operate, time-saving and strong in practicability.

The invention provides a POSS based polyionic liquid / rare earth fluorescent material and a preparation method thereof. The POSS based polyionic liquid / rare earth fluorescent material is characterizedby comprising POSS based polyionic liquid, wherein rare earth complexes are adsorbed around molecules of the POSS based polyionic liquid; the POSS-based polyionic liquid is obtained by the quaternaryamination reaction of a POSS-based imidazole polymer. The preparation method has strong operability, mild experimental conditions and good reproducibility. The obtained POSS based polyionic liquid / rare earth fluorescent material has stable quality and very good photothermal performance.

The invention discloses a preparation method of a thenoyltrifluoroacetone (HTTA) modified rare earth hydroxide nano-sheet fluorescence reinforcing material. The preparation method comprises the following steps of dissolving yttrium nitrate hexahydrate into deionized water firstly, then adding europium nitrate hexahydrate, and performing uniform mixing; dropwise adding dilute ammonia water, and regulating a pH value of the solution to 7.5; putting the solution in a microwave field, performing continuous microwave treatment for 20 min in the N2 protection atmosphere, performing air pump filtration, water washing and washing with ethanol on a product after microwave treatment, and then putting the product in a vacuum drying tank at the condition with the temperature being 35 DEG C for dryingand grinding to obtain a dry powdery rare earth hydroxide hydrate; and then performing ion exchange, ultrasonic treatment and modification on the dry powdery rare earth hydroxide hydrate to obtain theHTTA modified rare earth hydroxide nano-sheet fluorescence reinforcing material. According to the preparation method, by utilizing the antenna effect of a ligand, the energy absorbed by the ligand istransferred to rare earth ions, so that the fluorescence performance of a composite is improved by an order of magnitude.

The invention relates to a rare earth polyacid, organic light active molecule and layered double hydroxides composite luminous thin film and a preparation method thereof, and belongs to the technical filed of organic and inorganic composite luminous thin films. The method comprises the following steps of firstly, preparing a layered double hydroxides gel solution stripped by a formamido solution; respectively preparing rare earth polyacid and an organic molecule water solution; and using a hydrophilic substrate to carry out several times of alternative assembly in three solutions in a certain sequence to obtain the double-color organic and inorganic composite luminous thin film. The thickness of the thin film is accurately controllable at nano level, and the luminous strength is controllable through changing the number of assembly layers.

The invention discloses a fluorescent microsphere immunochromatographic test strip for detecting olaquindox residue and application thereof, the test strip can qualitatively and quantitatively detectolaquindox in water and feed, the sample pretreatment process is simple, convenient and fast, the detection time is short, and the test strip has very high precision and sensitivity; in addition, theolaquindox-resistant monoclonal antibody prepared by the invention is high in specificity; an olaquindox monoclonal antibody marked by fluorescent microspheres is adopted; the luminous intensity and the detection signal of the fluorescent microsphere can be enhanced along with the enhancement of the exciting light intensity, so that the fluorescent microsphere labeled olaquindox monoclonal antibody can effectively improve the analysis sensitivity of an immunochromatographic technique, and compared with the traditional colloidal gold immunochromatographic method, the immunochromatographic method provided by the invention has higher sensitivity; meanwhile, as the fluorescent microspheres have relatively stable morphological structures, the microspheres are uniform in granularity, good in dispersity and stability, high in luminous efficiency and good in repeatability, and dye fluorescence quenching is greatly reduced.

The invention relates to a spirofluorene dibenzacridine organic electroluminescent material and application thereof. The spirofluorene dibenzacridine organic electroluminescent material is provided with a molecular structure as shown in a formula I, wherein Ar1 and Ar2 are independently selected from hydrogen or aromatic groups. The organic electroluminescent material provided by the invention has a favorable film-forming property and a suitable molecular energy level, is capable of changing electron transition to enable a light-emitting peak position to be adjustable due to introduction of different substituent groups, and is a light-emitting material with good light-emitting efficiency.

The invention relates to a silicon oxide single-coated cesium-copper-chlorine quantum dot, and a preparation method and application thereof, and belongs to the technical field of quantum dots. A low-temperature coating technology is utilized, a precursor is utilized to capture water in air at a relatively low temperature, rapid hydrolysis is carried out, silicon oxide successfully coats the surface of the cesium-copper-chlorine quantum dot, surface defects of the cesium-copper-chlorine quantum dot can be effectively passivated through silicon oxide coating, the light-emitting quantum yield of the cesium-copper-chlorine quantum dot can be increased, and the stability of the quantum dot can also be improved. The luminous quantum yield of the silicon oxide single-coated cesium-copper-chloride quantum dot film is as high as 76%, and a white light emitting diode prepared from the silicon oxide single-coated cesium-copper-chloride quantum dot has the advantages of high luminous color rendering index, proper color temperature and the like, and is good in stability. The silicon oxide single-coated cesium-copper-chlorine quantum dot serves as a light source in visible light communication, the -3dB bandwidth of the optical fiber is 420 KHz, and bit loading in an OFDM mode reaches 4 bit / s / Hz. The method has the characteristics of good repeatability, no requirement for high-temperature and high-pressure conditions, low cost and the like, and is suitable for expanded production.

The invention discloses an organic-inorganic hybrid photosensitizer and a preparation method for a hybrid nanometer diagnosis and treatment reagent. According to the invention, polysilsesquioxane witha three-dimensional cage structure and a dodecyl chain are introduced into a porphyrin photosensitizer, and the photosensitizer is doped into organic semiconductor nanoparticles by a coprecipitationmethod; by utilization of the characteristic of high extinction coefficient of an organic semiconductor, the organic semiconductor is used as a light energy donor; the three-dimensional cage structureof the polysilsesquioxane can effectively inhibit aggregation of the porphyrin photosensitizer and reduce fluorescence quenching caused by aggregation of the organic semiconductor; meanwhile, the dodecyl chain on the polysilsesquioxane has the effect of enhancing the stability of nanometer particles; and thus, the obtained organic-inorganic hybrid nanometer diagnosis and treatment reagent is usedfor cancer photodynamic treatment under the guidance of high-performance fluorescence imaging.