110 results about "Upconversion luminescence" patented technology

The invention relates to a near-infrared light response in-situ gelling and synergistic photo-thermal-photodynamic gel delivery system and a preparation method and application thereof, a mesoporous silicon coated up-conversion nano-carrier and an efficient photosensitizer are compounded to form a photo-response core unit, and then the photo-response core unit is intelligently integrated with photo-curing hydrogel to form the near-infrared light response in-situ gelling and synergistic photo-thermal-photodynamic gel delivery system. The general problem of aggregation and quenching of photosensitive molecules is relieved by utilizing the unique space confinement effect of the mesoporous structure, the ICG photo-thermal efficiency and photodynamic performance are enhanced, under precise excitation of a near-infrared light source, the system can activate a photo-crosslinking reaction through an up-conversion luminescence process, in-situ conversion from a liquid eye drop preparation to a stable gel state is achieved, and the stability of the eye drop preparation is improved. A lasting drug reservoir is formed on the surface of the cornea; synchronously excited photodynamic and photo-thermal dual-mode treatment generates a remarkable synergistic antibacterial effect, and shows an excellent removal capability on pathogens including highly drug-resistant bacteria; meanwhile, an ideal microenvironment is created for tissue repair through high biocompatibility and a stable mechanical matrix, and integrity recovery of cornea structures and functions is promoted.

The invention belongs to the technical field of temperature sensors, and particularly relates to an up-conversion luminescence temperature sensor based on a plasmon effect and preparation and application thereof. The core of the sensor provided by the invention is a composite structure formed by a gold nanorod array and Er < 3 + > and Yb < 3 + > co-doped NaYF4 up-conversion nanoparticles, and the gold nanorod array is prepared by adopting a two-way aluminum oxide template method and is regularly and orderly arranged in a hexagonal shape. Under the excitation of 980nm near-infrared light, the local surface plasmon resonance effect of the gold nanorods can significantly improve the up-conversion luminescence intensity and accelerate the thermal response rate of the sensor; the ratio type temperature sensing system is constructed by detecting the fluorescence intensity ratio of two emission bands of 515-535 nm and 535-555 nm, self-calibration accurate detection within the temperature range of 303-348 K can be achieved, and the sensor has the advantages of being uniform in structure, controllable in preparation, high in detection sensitivity, high in response speed and the like.

A method for preparing a dual-mode immune structure based on a surface-enhanced Raman substrate and an up-conversion luminescent probe, and an application thereof. The dual-mode immune structure based on a surface-enhanced Raman substrate and an up-conversion luminescent probe comprises a copper / black phosphorus / silver nanoflower composite immunosubstrate and a NaGdF4:Yb3+ / Er3+ up-conversion nanoparticle immunoprobe, wherein the copper / black phosphorus / silver nanoflower composite immunosubstrate is prepared using an electrochemical reduction method, and the NaGdF4:Yb3+ / Er3+ up-conversion nanoparticle immunoprobe is prepared using a hydrothermal method. During the application to cancer detection, assembling an immunosubstrate and an immunoprobe realizes the combination of up-conversion luminescence and surface-enhanced Raman spectroscopy technology for realizing dual-mode detection of cancer biomarkers. Thus, simple operation and high detection sensitivity are achieved, thereby facilitating efficient and precise clinical screening and identification of cancer biomarkers.

The invention discloses GPU chip forming equipment and a chip packaging method, and the method comprises the steps: injecting bottom filling resin containing an ultraviolet light initiator, a latent thermal initiator, up-conversion luminescence nanoparticles and magnetic induction heating nanoparticles into a gap between a bare chip and a substrate, and forming a functional resin layer; performing ultraviolet irradiation on the peripheral area, so that the photoinitiator is polymerized to release heat and activate the latent thermal initiator to generate a thermal polymerization reaction frontal surface which is propelled from outside to inside; near-infrared light is transmitted through a bare chip to excite up-conversion luminescent nanoparticles to release ultraviolet light in a shading area, and the ultraviolet light and a thermal polymerization reaction frontal surface cooperate to initiate resin polymerization in the shading area; applying an alternating magnetic field to the initially cured resin layer, exciting magnetic induction to heat the nanoparticles to generate induction heat to trigger the residual latent thermal initiator to complete deep curing and release residual stress; and gradient cooling and constant-temperature aging treatment are executed. According to the invention, the uniform deep curing of the filling resin at the bottom of the GPU chip can be realized in an all-black workshop environment.

The invention relates to an up-conversion infrared photon contact lens as well as a preparation method and application thereof, and belongs to an infrared visual material. Wrapping the surface of the solid nanometer microsphere with the up-conversion nanometer particles to form an up-conversion luminescence core-shell structure microsphere; dispersing the up-conversion core-shell structure microspheres in an acrylate solution to prepare an up-conversion luminescent layer (UCL); dispersing polymer microspheres in an acrylate solution to prepare an up-conversion light reflecting layer (GRL); dispersing the solid nano-microspheres in an acrylate solution to prepare an infrared reflection layer (IRL); dispersing the hollow nano-microspheres in an acrylate solution to prepare a surface antireflection layer (ARL); and further obtaining the up-conversion infrared photon contact lens. The contact lens prepared by the invention has excellent up-conversion luminescence performance and a good wearing function, and can realize efficient utilization of infrared photons so as to realize visualization of infrared light.

The invention provides and discloses an anti-counterfeiting material based on multi-mode invisible light fluorescent powder and a preparation method and application thereof, the fluorescent powder is Mg3Y2Ge3O12: Bi < 3 + > / Pr < 3 + > / Yb < 3 + > / Er < 3 + >, triple independent luminescence is realized through quaternary ion co-doping: 980nm near-infrared excitation green up-conversion luminescence (UCL) and 254nm ultraviolet excitation red down-conversion luminescence (DCL), 328nm deep ultraviolet long afterglow (PersL) is generated after ultraviolet excitation is stopped, and the fluorescent powder can be used for preparing anti-counterfeiting materials. Wherein the ultraviolet PersL needs to be detected by special CCD (Charge Coupled Device) equipment to form an invisible hidden layer; during verification, naked eye observation (UCL / DCL) and equipment reading (PersL) are combined to realize four-stage dynamic anti-counterfeiting. The limitation of dependence on visible light in the prior art is broken through, double anti-counterfeiting logic of visible information and hidden ultraviolet verification is formed, the anti-counterfeiting safety level is remarkably improved, and the material stability is excellent.

The invention relates to the technical field of nano materials and biomedical engineering, and discloses a dye-sensitized rare earth up-conversion luminescent nano material as well as a preparation method and application thereof. The dye-sensitized rare earth up-conversion luminescent nano-material comprises a rare earth doped up-conversion nano-particle core, an unsaturated fatty acid salt self-assembled shell layer and a near-infrared dye modified on the surface of the rare earth doped up-conversion nano-particle. The unsaturated fatty acid salt coating layer endows the material with excellent water dispersibility through a hydrophilic group; a hydrophobic chain segment and an unsaturated double bond can effectively block water and oxygen permeation and quench singlet oxygen, so that the photobleaching half-life period of the material is increased by 86.7 times or more compared with that of a conventional coating material, and the light stability is excellent; the material successfully realizes efficient up-conversion luminescence under excitation of a low-power near-infrared light emitting diode (NIR LED, the power density of which can be as low as 100mW / cm < 2 >), and thoroughly gets rid of dependence on a high-cost and high-risk laser.

The invention provides an optical encryption communication method and system based on up-conversion pulse response, and relates to the technical field of information encryption, and the method comprises the steps: converting to-be-encrypted original data into coded data according to a preset transcoding rule; according to the coded data and a luminescence characteristic mapping table, target excitation parameters of the laser pulse are determined, the target excitation parameters comprise the target width of the laser pulse, and the luminescence characteristic mapping table is used for representing luminescence characteristics of each luminescence wave band in the up-conversion luminescent material; and exciting the up-conversion luminescent material by using a laser pulse with a target excitation parameter, so that the up-conversion luminescent material emits a fluorescence signal corresponding to the coded data. Therefore, the target excitation parameter of the laser pulse can be determined by utilizing the light emitting characteristic of the light emitting wave band in the up-conversion light emitting material, so that the emission of the fluorescence signal is realized, namely, the encrypted communication can be realized by controlling the laser pulse without switching and controlling multiple light sources, and the efficiency of the encrypted communication is improved.

The invention discloses an up-conversion luminescence time sequence regulation color-changing material, color-changing ink and a preparation method and application thereof, the chemical general formula of the material is SrMoO4: xYb < 3 + >, yHo < 3 + > and zNa < + >, x is the molar doping amount of Yb < 3 + >, y is the molar doping amount of Ho < 3 + >, z is the molar doping amount of Na < + >, 0.10 < = x < = 0.40, 0.01 < = y < = 0.03, and 0.21 < = z < = 0.31. According to the material, under the condition of charge compensation ion Na < + > co-doping, the solid solubility of sensitizer ions Yb < 3 + > in SrMoO4 crystal lattices is remarkably improved, and under the condition of Na < + > excessive charge compensation, the material is remarkably superior to the upconversion luminescence effect of other charge compensation enhanced heterovalent doping systems reported in literatures; the color-changing ink for advanced dynamic anti-counterfeiting and the application method thereof are designed and developed by combining the remarkably enhanced up-conversion luminescence and the excellent time sequence regulation color-changing characteristic of the material, and the color-changing ink has a wide application prospect in the field of dynamic fluorescent anti-counterfeiting.

The invention discloses a method for regulating and enhancing ultraviolet fluorescence of rare earth up-conversion nanocrystals through a local structure and a method for measuring the local structure, and belongs to the field of rare earth luminescent nanomaterials. According to the method, in the process of synthesizing the LiREF4: coated LiREF4 core-shell structure, the stoichiometric ratio of LiOH and NH4F in a core layer and / or the use amount of lithium trifluoroacetate in a shell layer are precisely regulated and controlled, and the localized crystal field environment around activated ions is changed, so that the selective regulation and control on the luminescence transition path of the activated ions are realized, and the emission intensity of multiphoton ultraviolet up-conversion luminescence is improved. According to the method, the high-order multi-photon up-conversion process of rare earth ions can be remarkably enhanced, meanwhile, low-order emission is inhibited, the luminescence selectivity of an up-conversion nano material is improved, emission light with the corresponding wavelength can be synthesized from the same matrix material according to the requirements of synthesizers, and the method can be suitable for various rare earth active ions and matrix materials and has a wide application prospect. The method has application potential in the fields of nano photonics and biomedicine.

The application discloses a kind of near-infrared benzothiadiazole dye sensitized rare earth upconversion luminescence nano-probes and preparation method thereof;Probe is composed of near-infrared benzothiadiazole dye and upconversion nanoparticle, benzothiadiazole dye is compounded with ligand-free lanthanide ion doped upconversion nanoparticle, and upconversion luminescence is enhanced.This application preparation method is simple, and it does not involve complex core-shell structure and energy migration process, benzothiadiazole dye is directly compounded with ligand-free rare earth nanoparticle, and upconversion luminescence nano-probe is formed, under the irradiation of 808nm laser, the emission spectrum of benzothiadiazole dye and the absorption spectrum of sensitizer ion in upconversion nanoparticle overlap, which can effectively enhance the upconversion luminescence intensity of nano-probe, and keep good light stability, keep more than 90% of initial luminescence intensity under the irradiation of 120 minutes excitation light.

The invention provides an all-dielectric grating quasi-BIC up-conversion luminescence enhancement structure and application thereof. The all-dielectric grating quasi-BIC up-conversion luminescence enhancement structure comprises a substrate; wherein a plurality of silicon nitride gratings are arranged on the upper surface of the substrate at equal intervals, interval grooves are formed between the adjacent silicon nitride gratings, and conversion nanoparticles are arranged in the interval grooves. The in-plane symmetry is destroyed by introducing perturbation, so that SP-BIC can be converted into qBIC, a local electric field in a grating gap is remarkably enhanced, the up-conversion nanoparticles are arranged in the grating gap, the up-conversion emission intensity is enhanced, and compared with traditional surface plasma up-conversion enhancement, the theoretical luminescence enhancement factor reaches 1.58 * 10 < 15 >.

The application belongs to the technical field of new materials, and discloses a reinforced rare earth doped upconversion luminescence metal organic framework material, a preparation method and application, a basic building unit of the material has a chemical formula of C4HO8Ln, and is recorded as Ln-MOFs, wherein the Ln site is jointly occupied by one, two or three different rare earth ions, including a sensitizing agent rare earth ion, an activator rare earth ion and an energy mediating node rare earth ion; the Ln-MOFs are prepared by a high-temperature solvothermal method, and a three-dimensional framework is constructed by taking rare earth ions as metal centers and oxalic acid and formic acid as organic ligands, wherein the formic acid is derived from in-situ decomposition of a DMF molecule under high temperature. Under excitation of 980 nm near-infrared light, the three-doped Ln-MOFs have a significantly improved upconversion luminescence intensity of Ho 3+ . The upconversion luminescence intensity of Ho 3+ is significantly improved by taking the energy mediating node. The material prepared by the application can be widely applied in the fields of optical anti-counterfeiting and information security storage.

The present application belongs to the technical field of luminescent materials, and particularly relates to a calcium stannate color-changing material and a preparation method thereof. 2.015‑ x Ho 0.005 SnO4:xYb 3+ wherein x is 0-0.07. The calcium stannate color-changing material provided by the present application has more obvious color-changing effect, higher color-changing rate and light intensity control rate, and has up-conversion luminescence intensity control and down-conversion luminescence intensity control performance at the same time, as compared with the color-changing ceramic obtained by doping a calcium stannate matrix with Al 3+ or Eu 3+ .

The application discloses a dual-frequency excitation up-conversion luminescence glass ceramic, a preparation method thereof and a three-dimensional display device. The dual-frequency excitation up-conversion luminescence glass ceramic comprises 40-80 mol parts of TeO2, 10-40 mol parts of ZnO, 5-60 mol parts of GeO2, 0.01-5 mol parts of ErF3 and 0.1-10 mol parts of CaF2. The dual-frequency excitation up-conversion luminescence glass ceramic can generate high-brightness and high-contrast green light under the common excitation of near-infrared light of two different wavelengths of 850 nm and 1550 nm, and has high luminescence efficiency, and can be widely applied in the fields of three-dimensional display, solar cell, optical switch and laser.

This invention provides a three-layer core-shell structured rare-earth upconversion luminescent material, its preparation method, and its application, relating to the field of luminescent material technology. This invention provides a three-layer core-shell structured rare-earth upconversion luminescent material with NaYF4:Er 3+ With NaYF4:Yb as the core 3+ The core-shell structure consists of an intermediate shell and a NaYF4 outer shell. This novel three-layer core-shell structure reduces surface defects and solves the problem of easy quenching. It exhibits strong single-band red light emission performance, and its upconversion luminescence performance is significantly improved compared to existing materials. It demonstrates excellent luminescence performance and good biological stability, and can be applied in fields such as biomedicine and infrared detection, providing a new material for further expanding its application in the field of luminescence.

The invention relates to the technical field of upconversion materials, and particularly provides a core-shell structure upconversion material and a preparation method thereof. The structure of the upconversion material with the core-shell structure is NaLnF4: RE13 < + >, RE23 < + > and Ag2S. The invention also provides a preparation method of the up-conversion material with the core-shell structure. According to the method, toxic gas H2S does not need to be used, the coating process of the Ag2S shell layer can be completed through a one-step solvothermal method, the process is simple, safe and suitable for large-scale preparation, the problems of process complexity and safety existing in the prior art are fundamentally solved, and the obtained core-shell structure up-conversion material shows an excellent luminous effect and is suitable for large-scale preparation. The up-conversion luminescence quantum yield under the excitation of 980nm laser is not less than 7%.

The application discloses a ratio type fluorescent probe for 4-hexyl resorcinol detection and a preparation method thereof, relates to the field of food safety detection technology, and comprises up-conversion nanoparticles and fast blue B salt; the up-conversion nanoparticles are NaYF4:Yb,Er@NaYF4 up-conversion nanoparticles with a core-shell structure. The application introduces the fast blue B salt as a 4HR specific recognition unit, combines the up-conversion luminescence characteristics of the up-conversion nanoparticles, and constructs a visual detection system; near-infrared (980 nm) is used to excite the up-conversion nanoparticles, so that the interference of background fluorescence is effectively eliminated; and based on the rapid color reaction between the fast blue B salt and 4HR and the luminescence response of the up-conversion nanoparticles, the detection time is greatly shortened.

The present invention discloses a white-light-emitting upconversion rare-earth-doped nanomaterial and a preparation method thereof. The core-shell structured LiYF4:xHo@LiYbF4@LiYF4 upconversion nanoparticles (0 < x ≤ 0.02) with a particle size of 28-38 nm are synthesized by the high-temperature co-precipitation method. They have good dispersibility and obvious upconversion luminescence. Under 980 nm laser excitation, they exhibit upconversion fluorescence at 480 nm, 540 nm and 650 nm, making their overall color show white light, and having good application prospects in the fields of biomedicine, solar cells, temperature sensors and photocatalytic degradation, etc.

The application discloses a kind of high transparent rare earth nanoparticles / cage polysilsesquioxane composite photoresist and its preparation method and application, the photoresist includes the composite matrix consisting of cage polysilsesquioxane, multifunctional acrylate and photoinitiator, and the rare earth nanoparticles modified by bifunctional ligand.The bifunctional ligand anchors nanoparticles by first functional group, and forms chemical bonding with matrix by second functional group, realizes the atomic level uniform dispersion of nanoparticle.The photoresist has very high optical transparency, high-efficiency up-conversion luminescence performance and very high ultraviolet photosensitivity.Its preparation process is simple, without high-temperature expensive equipment, can be adapted to a variety of photo-curing technology realizes the integration precision forming of complex three-dimensional structure luminescence device, has wide application prospect in integrated photonics device field.

The application discloses a red and near-infrared emission rare earth-based fluorescent powder and belongs to the technical field of luminescent materials. The application adopts a high-temperature solid-phase method to prepare the red and near-infrared emission rare earth-based fluorescent powder, and the chemical formula is Bi2Er (1‑x) O4Cl:xB; wherein 0.01<=x<=0.1; the element B is one of Li, Na and K. 3+ The element Er 3+ serves as a sensitized ion and a luminescent center ion. Different from a general up-conversion luminescent system which has multi-band emission in visible light, the red and near-infrared emission rare earth-based fluorescent powder has single-band red light emission in visible light, the luminescence is enhanced by 3.2 times, the emission range is wide, and the emission band covers a red light region of 630nm-730nm and a near-infrared region of 1500nm-1600nm. The near-infrared region has strong emission and thermal stability. In addition, the red and near-infrared emission rare earth-based fluorescent powder has low biological toxicity.

The application relates to the technical field of light-emitting materials, and discloses an in-vitro multiplex detection method and related equipment. The in-vitro multiplex detection method comprises the following steps: obtaining a first photoluminescence spectrum corresponding to a plurality of up-conversion luminescence coding materials and a second photoluminescence spectrum corresponding to a magnetic separation product, obtaining a color difference between the second photoluminescence spectrum and each first photoluminescence spectrum in a LAB color space, and comparing each color difference with a preset threshold value, so that the target type of a sample to be detected can be determined. The first photoluminescence spectra do not need to have different luminescence peak wavelengths, and obvious photoluminescence color differences do not need to be generated. In the multiplex detection application, the type of the up-conversion luminescence coding materials that can be used is greatly increased, and errors caused by human eye judgment and equipment limitations can be effectively avoided, so that the accuracy of the in-vitro multiplex detection is improved.

The invention discloses an up-conversion luminescent transparent ceramic material and a preparation method and application thereof, and relates to the technical field of up-conversion luminescent materials.The preparation method comprises the steps that an aluminum oxide ceramic substrate is coated with layered rare earth hydroxide doped with rare earth ions, interface reaction is conducted through calcination, and the luminescent transparent ceramic material is obtained; according to the preparation method, not only can the time consumption be reduced, but also the requirements on equipment are reduced; the obtained transparent ceramic luminescent material is nontoxic and harmless to a human body, has the advantages of good mechanical strength, wear resistance and the like, and can be applied to the fields of lasers, temperature sensors, illumination and the like.

The application discloses a degradable NaCeF4-based up / down conversion luminescent material and a preparation method and application thereof, and belongs to the technical field of luminescent materials. 4+ The molar ratio of Ce 3+ , Yb 3+ , Tm 4+ and Zr is (60-80):(18-22):(0.08-0.12):(2-20). The NaCeF4-based up / down conversion luminescent material has good degradability, high up-conversion emission efficiency, and an up-conversion emission Stokes shift increased to the ultraviolet region; the up-conversion luminescent material can simultaneously emit up-conversion luminescence and down-conversion luminescence under 980nm laser irradiation, and is expected to be used as a contrast agent for fluorescence imaging; and the preparation process is simple, environment-friendly and low in cost.

This application discloses a rare-earth upconversion luminescent material, which comprises a multi-component complex; the multi-component complex comprises a rare-earth metal ion center and an organic ligand chelated and coordinated with the rare-earth metal ion center; the rare-earth metal ion center comprises at least two Yb atoms. 3+ Sensitizer; the upconversion luminescence excitation wavelength of the rare earth upconversion luminescent material is 980 nm; the multi-component complex contains less than or equal to 20408 cm⁻¹ ‑1 The energy levels of the excited state; the rare earth upconversion luminescence is the Yb 3+ Upon excitation, the sensitizer co-transfers energy to the excited state of the organic ligand, which then undergoes upconversion luminescence. This application represents the first realization of upconversion luminescence in rare-earth molecular cages, potentially enabling lanthanide organic components to become novel upconversion luminescent materials for biological applications.

This invention discloses a photosensitizer with twisted π-conjugated charge transfer properties, its preparation method, and its applications. The preparation method of the photosensitizer includes the following steps: dissolving a quinolino[3,2,1-de]acridin-5,9-dione derivative, a perylene diimide with brominated position, and a basic substance in a first solvent to obtain a mixture; reacting a palladium catalyst with the mixture under a protective atmosphere; and after the reaction, extracting and purifying to obtain the photosensitizer with twisted π-conjugated charge transfer properties. The photosensitizer prepared by this invention uses a perylene diimide photoabsorbent group as an electron acceptor, which is then coupled with an electron donor group through a ring-closure reaction to prepare a photosensitizer with a twisted π-conjugated structure. The compound prepared by this invention has a long excited-state lifetime, high intersystem crossing efficiency, and suitable energy level structure, making it an ideal candidate material for photosensitizers and suitable for upconversion luminescence systems and visible light photocatalytic oxidation reactions.

The application discloses a novel multi-mode display material and a preparation method thereof. The novel multi-mode display material comprises a multi-mode display layer, and the multi-mode display layer is formed by compounding a CLCE matrix and an up-conversion luminescent material. The CLCE matrix is a controllable cross-linking density elastic network with a spiral superstructure, and the spiral pitch of the CLCE matrix is regulated by a chiral agent concentration, a mechanical force or heat, so that a photonic band gap is regulated. Meanwhile, the chiral agent can also regulate a chiral selective reflection function through the chirality of the chiral agent. The up-conversion luminescent material comprises a functionalized luminescent component, the functionalized luminescent component is combined with the CLCE matrix through a covalent grafting or an adaptive dispersion mode, and the functionalized luminescent component can generate up-conversion luminescence under excitation of specific wavelength light. Through the synergistic effect of the CLCE matrix and the up-conversion luminescent material, the multi-mode display layer has four-dimensional orthogonal optical functions of mechanical response, thermal response, light response and chiral selective reflection.

The invention relates to the technical field of artificial synapses, in particular to a composite artificial synapse which comprises a core functional layer, the core functional layer is a composite material layer, and the composite material layer is formed by mixing a SrAl2O4-based long afterglow material and a NaYF4-based up-conversion material; eu < 2 + > and Dy < 3 + > are doped in the SrAl2O4-based long afterglow material; yb < 3 + > and Tm < 3 + > are doped in the NaYF4-based up-conversion material; under excitation of near-infrared light, the NaYF4-based up-conversion material transmits energy to the SrAl2O4-based long-afterglow material through up-conversion luminescence, so that the SrAl2O4-based long-afterglow material generates long-afterglow luminescence, and a synaptic function is realized; through thermal stimulation, the release process of defect trap electrons in the SrAl2O4-based long afterglow material is regulated and controlled, and thermally induced synaptic plasticity is realized. According to the invention, SrAl2O4: Eu < 2 + >, Dy < 3 + > and NaYF4: Yb < 3 + >, Tm < 3 + > are coupled, so that long afterglow luminescence (LPL) of near-infrared triggering and thermal regulation is realized, and information encryption, handwritten number recognition and mechanical arm gesture control are realized by artificial synapses based on photo-thermal synergistic stimulation.

The application provides application of metal sulfate in preparation of rare earth up-conversion luminescent material; the metal includes alkali metal and / or alkaline earth metal. The application particularly applies alkali metal sulfate and / or alkaline earth metal sulfate in preparation of rare earth up-conversion luminescent material, which enhances the luminescent performance without obviously affecting the crystal phase and composition of the crystal. The application also provides a preparation method of the corresponding electrolyte adjuvant-enhanced rare earth up-conversion luminescent material, which uses alkali metal or alkaline earth metal sulfate as electrolyte adjuvant, hardly needs any post-treatment process, does not affect the original structure and proportion of the crystal, has good repeatability, involves only water as a green solvent in the whole process, has low cost, is easy to mass-produce, has good application prospect and potential economic benefits.

The present application relates to the field of biological medicine nanomaterials, and particularly relates to a kind of nanocomposite material and its preparation method and application.The preparation method of nanocomposite material provided by the present application, first, by a kind of room temperature fast, green method is synthesized hollow sodium bismuth fluoride carrier, and doping makes it have excellent upconversion luminescence performance, then using the excellent surface area of hollow sodium bismuth fluoride is successfully loaded photosensitizer MC540, clothing mould toxin, finally using DSPE-PEG-FA is modified, obtains nanocomposite material.It can effectively activate tumor cell endogenous calcium overload, induce tumor cell pyroptosis, realize the effect of efficient cancer treatment.