811 results about "Luminescence" patented technology

The invention belongs to the technical field of organic radiation luminescence and radiation imaging, and discloses an aggregation-induced delayed fluorescence (AIDF) type organic scintillator material and a preparation method thereof, and a preparation method and application of a flexible organic scintillation film. The molecular structure of the material comprises carbonyl, methylene, sulfuryl and other connecting units, phthalonitrile is used as an acceptor unit, carbazole is used as a donor unit, an aggregation-induced excitation state is formed through space charge transfer among molecules, efficient AIDF luminescence and large Stokes shift characteristics are realized, the self-absorption phenomenon is effectively avoided, and the luminescent efficiency is improved. The X-ray fluorescence probe is suitable for a luminescence process under an X-ray excitation condition, the sensitivity of X-ray detection is remarkably improved, and the lowest detection limit can reach 276nGy.s <-1 > and is far superior to the 5.5 mu Gy.s <-1 > standard required by medical diagnosis. Besides, the flexible scintillator film prepared based on the material system radiates and emits light within the waveband range of 450-750 nm and is perfectly matched with the response area of a silicon-based detector, X-ray imaging with the high signal-to-noise ratio is achieved, and the imaging resolution is as high as 20.01 lp.mm <-1 >.

The invention provides a method for plasma bombardment energy distribution detection and life prediction of a silicon carbide part, and belongs to the technical field of semiconductor processing based on deep learning. The method comprises the following steps: firstly, arranging a magnetic probe array to obtain local electromagnetic parameters, and obtaining plasma luminescence characteristics by using optical imaging and spectrum acquisition equipment; preprocessing the acquired data to obtain multi-source fusion features; designing an energy distribution reconstruction framework based on a generative adversarial network, wherein a generator is used for deducing a three-dimensional energy distribution field of plasma; and inputting the three-dimensional energy distribution field time sequence characteristics into a bombardment dynamic characteristic modeling time sequence depth network, establishing a nonlinear mapping relation between energy distribution and material aging, further obtaining life prediction parameters, and finally obtaining the remaining service life of the silicon carbide part. According to the method, a complex degradation mechanism can be reflected more accurately, and the precision and robustness of life prediction are remarkably improved.

The invention relates to the field of electrochemiluminescence imaging analysis, and particularly discloses a single-particle electrochemiluminescence imaging method by adjusting the thickness of a molecular self-assembly layer, which is used for solving the problems of serious non-specific luminescence of an electrode substrate, incapability of finely regulating an interface structure, poor stability and the like in single-particle electrochemiluminescence imaging. The method comprises the following steps: preparing an insulating molecule self-assembly layer with gradient thickness, optimizing a fixing process of gold nanoparticles, determining the position of a single particle, carrying out ECL imaging acquisition on the single particle, and optimizing the thickness of the molecule self-assembly layer. According to the method, the thickness of a molecular self-assembly layer is precisely regulated and controlled, a nano-particle fixing and ECL system is optimized, and a single-particle ECL imaging device is built, so that the signal-to-noise ratio of single-particle electrochemical imaging can be increased, and background interference caused by non-specific luminescence of an electrode substrate is effectively inhibited.

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 nano fluorescent powder, and particularly relates to Ca10 (PO4) 6 (OH) 2: RE < 3 + > nano fluorescent powder as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing Ca (NO3) 2 and RE (NO3) 3 solutions in proportion to prepare a cation solution, dropwise adding a certain amount of H3PO4 to prepare a mixed solution, adjusting the pH value by using a charge compensation agent, uniformly stirring, performing ultrasonic dispersion, performing hydrothermal reaction on the obtained solution, and purifying to obtain the final product Ca10 (PO4) 6 (OH) 2: RE < 3 + > nano fluorescent powder. The charge compensation agent is at least one of KOH and LiOH. By utilizing the methods, the invention provides the Ca10 (PO4) 6 (OH) 2: RE3 + nano fluorescent powder taking K < + > / Li < + > as the charge compensation agent, and the Ca10 (PO4) 6 (OH) 2: RE3 + nano fluorescent powder has the advantages of thermal stability, color stability and high luminescence, and is suitable for temperature sensing, cheilogramma and anti-counterfeiting detection.

An apparatus and method for realizing photon pair emission and fiber output on the basis of quantum dots. The apparatus comprises: a single quantum dot (1), which is used for generating cascaded luminescence of single excitons and biexcitons, wherein an exciton state exhibits luminescence in two polarization states, i.e. H and V, and the two polarization states have an energy splitting; a microcavity (2), which is formed by a first Bragg reflector (3) and a second Bragg reflector (4), and is used for controlling the directional light emission of the single quantum dot (1); an optical fiber coupling component (6), which is prepared by means of vertically bonding a single-mode optical fiber (5) and encapsulated by means of curing, and is used for collecting the cascaded luminescence of single excitons and biexcitons generated by the single quantum dot (1); a local electric field, which is generated by a single dopant atom (22) in an adjacent modulation-doped layer (21), and is used for tuning the single quantum dot (1), so as to reduce exciton energy splitting and tune an exciton wave function; a luminescence output module, which is used for performing fluorescence collection on the single quantum dot (1) and outputting the collected cascaded luminescence of single excitons and biexcitons in the form of a Gaussian optical field; and a photon pair correlation test unit (11), which is used for filtering the cascaded luminescence of single excitons and biexcitons, and testing polarization correlation on the basis of filtered single excitons and biexcitons.

The present invention provides a high-speed image analysis method suitable for identifying the interaction structure between flames in multi-jet flames, and belongs to the technical field of flame structure analysis. The present invention processes the flame self-luminescence / induced fluorescence image taken by a high-speed camera through a digital image processing method to identify the overlapping area between multi-jet flames, and specifically includes the following steps: selecting the analysis area, dividing the analysis area, Gaussian filtering, feature corner point detection, feature corner point supplementation, optical flow field calculation, flame area discrimination, flame outer contour recognition, and adjacent flame interaction extraction. The present invention discloses a high-speed image analysis method suitable for identifying the interaction structure between flames in multi-jet flames, which can identify the interaction structure between multiple flames from the flame image, and has high recognition efficiency. It can provide a method for further analyzing the interaction between flames and is very suitable for use in the field of flame structure research in multi-nozzle combustion chambers.

The utility model relates to the technical field of biological detection, and discloses a bioluminescence detector which comprises a bottom plate, a reagent rack and a luminescence detection module, the reagent rack and the luminescence detection module are arranged on the bottom plate, the reagent rack is connected with a kit in a sliding manner, a light filtering assembly is arranged above the kit, the light filtering assembly is provided with a plurality of light filters for selecting light waves, and the light filtering assembly is connected with the luminescence detection module. The luminous detection module detects an optical signal in the kit through the optical filter; the whole structure is compact, optical signals of non-target wavelengths can be removed and background light interference can be reduced by using the optical filters, so that the purity of the detection signals is improved, the light emitting detection module can detect the optical signals of the target wavelengths in a more targeted manner, and the accuracy of the detection result is enhanced; the appropriate filtering wave band can be selected according to different types of chemical agent reactions to meet different detection requirements, the application range of the detector is expanded, and the detector can be suitable for various bioluminescence reactions.

The invention discloses a gold nanocluster electrogenerated chemiluminescence probe which is a multifunctional gold nanocluster obtained by taking a 2-sulfydryl-1, 3, 4-thiadiazole ligand as a reducing agent or a protective agent. Comprising a solid-phase probe with a gold cluster modified on an electrode; or the gold cluster is independent of the electrode and is a liquid-phase probe dissolved in the electrolyte during use. The obtained electrogenerated chemiluminescence gold nanocluster probe can generate an electrogenerated chemiluminescence signal under the condition of no co-reactant, and is relatively low in luminescence potential, high in quantum yield and good in biocompatibility.

The invention relates to the technical field of fluorescent probes, and provides a fluorescent probe luminescence brightness quantification method and system for coupling excitation wavelength detuning. The fluorescence probe luminescence brightness quantification method for coupling excitation wavelength detuning comprises the following steps: constructing an initial structure of a probe molecule, and optimizing a geometric structure of a ground state of the probe molecule to obtain a stable configuration of the ground state of the probe molecule; based on the stable configuration of the ground state of the probe molecule, the excitation states are calculated, and the excitation energy of the lowest n excitation states of the probe molecule and the absorption transition dipole moments of the probe molecule in the X, Y and Z directions are obtained; based on the stable configuration of the ground state of the probe molecule, optimizing the geometric structure of the lowest excited state of the probe molecule to obtain the emission energy of the lowest excited state of the probe molecule and the emission transition dipole moments of the probe molecule in the X, Y and Z directions; and calculating a luminance index in combination with the energy parameter and the transition dipole moment parameter so as to select an optimal probe. Therefore, accurate and rapid prediction of the luminescence brightness of the probe is realized.

The invention relates to the technical field of LED display, and discloses a photo-thermal crosstalk modeling and compensation method for a multi-chip LED display module, and the method comprises the steps: controlling an LED display screen to display a specific test sequence to a thermal stable state, and obtaining original hyperspectral data through a spectrum collection module; executing spectral unmixing to extract photon counting and peak wavelength of an independent channel; constructing a photo-thermal bidirectional coupling model containing a photoluminescence gain and thermal feedback attenuation competition mechanism, and performing numerical approximation by using a sequence space polynomial; solving a coefficient set containing linear, nonlinear and spatial crosstalk items by adopting a block least square method; and calculating a photo-thermal crosstalk predicted value based on the coefficient set, generating reverse compensation data and correcting the driving current. According to the invention, the problems of chromaticity drift and non-uniform brightness of the high-density LED module under different gray levels are effectively solved by quantifying a photo-thermal bidirectional competition mechanism and nonlinear characteristics of gray level response, and pixel-level fine calibration is realized.

The invention relates to a stimulus-response lasting phosphorescent material based on carboxymethyl chitosan and a preparation method and application thereof, the preparation method comprises the following steps: preparing a mixed solution: mixing purified carboxymethyl chitosan with pyrene-2, 7-dicarboxylic acid mother liquor dissolved by sodium hydroxide, and introducing acid to adjust the pH value to obtain the mixed solution; and preparing an afterglow film material: pouring the obtained mixed solution into a mold, and drying to obtain the stimulus-response-lasting phosphorescent material based on carboxymethyl chitosan. Compared with the prior art, the material disclosed by the invention is diversified in response dimension, wide in color change range, stable in luminescent property at normal temperature, free of inert gas or vacuum protection in a use process, good in actual operability and reusability, and suitable for customized development of personalized anti-counterfeiting ink; the material can also be used as a functional additive to be doped in hydrophilic macromolecules, and is used for intelligent information labels, wearable display fabrics, noctilucent art materials, flexible encryption coatings and other emerging application scenes.

The invention relates to a high-performance copper (I)-based glass scintillator material and a preparation method thereof, and particularly discloses a Cu (I)-based hybrid metal halide optimized based on halogen engineering (Cl, Br, I), and the X-ray absorption cross section and the light output performance are remarkably improved. The light yield of the material reaches 79, 770 photons MeV <-1 > and is improved by 180% compared with that before optimization. The transparent glass scintillation screen (optical transmittance gt; the material has excellent X-ray imaging resolution (20.5 lp mm <-1 >), and also shows good thermal stability (stable luminescence performance at a high temperature of 150 DEG C) and anti-radiation durability. The material has the advantages of high light yield, low detection limit, high spatial resolution and the like, provides a breakthrough solution for application of the zero-dimensional halogenated cuprous-based scintillator in the fields of X-ray detection and imaging, and is particularly suitable for the fields of medical diagnosis, industrial nondestructive testing, high-energy physical detection and the like.

The invention relates to the technical field of organic detection, in particular to a nanoparticle modified quantum dot MOF material and a preparation method and application thereof. A zirconium-based double-ligand metal organic framework material is used as a carrier, a co-reaction accelerant Ti3C2 quantum dot is modified to enhance the electrochemical luminescence reaction efficiency, and copper-gold nanoparticles are loaded to amplify signals. The nanoparticle modified quantum dot MOF material provided by the invention can be prepared into an aptamer biosensor for accurately identifying malathion, and has high sensitivity and high selectivity. According to the invention, a nanoparticle modified quantum dot MOF material is coupled and combined with an aptamer, and an aptamer probe with high electrochemical luminescence activity and specific sensitivity to malathion is constructed. When the malathion acts on the aptamer probe, the malathion is combined with the aptamer in a high affinity manner, the aptamer probe is separated from the surface of the electrode, and meanwhile, an electrochemical luminescence signal is changed, so that the malathion residue in the agricultural product is rapidly detected.

The invention provides a fullerene pyrrolidine enantiomer mediated cholesteric liquid crystal with circular polarization luminescence property and nonlinear anti-saturated absorption property, and a preparation method and application thereof. The method comprises the following steps: dissolving C60, paraformaldehyde and (R / S)-(+ / -)-alpha-methylbenzylamine in an organic solvent, and carrying out heating reflux reaction to obtain fullerene pyrrolidine enantiomer molecules; dissolving in carbon disulfide to obtain an enantiomer solution; dissolving achiral dye molecules in a solvent to obtain a dye solution; and dropwise adding the enantiomer solution and the dye solution into thermotropic liquid crystal molecules, and drying to obtain the thermotropic liquid crystal. The method is simple, the obtained cholesteric liquid crystal system shows a characteristic fingerprint texture and has a periodic spiral structure, and the doping proportion of chiral molecules is easy to adjust; the composite system has good time stability and is not prone to phase separation; the liquid crystal platform shows good circular polarization luminescence performance and third-order nonlinear optical property, and is a cholesteric liquid crystal platform with an integrated function.

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 belongs to the field of functional nano materials and optical imaging, and particularly relates to a gold nanocluster and a preparation method and application thereof. The surface of the gold nanocluster contains a sulfydryl ligand A and a sulfydryl ligand B, the sulfydryl ligand A is ATT, and the sulfydryl ligand B is a sulfydryl ligand containing arginine; fluorescence quantum efficiency and electron transfer efficiency are synergistically enhanced on the basis of interaction of hydrogen bonds in the gold nanoclusters, the ultra-small luminous gold nanoclusters protected by double ligands are synthesized, the electrochemical luminescence quantum efficiency of the ultra-small luminous gold nanoclusters is up to 13.0% and is 4.2 times of that of a standard compound terpyridyl ruthenium in the field of electrochemical luminescence, and the ultra-small luminous gold nanoclusters are high in electrochemical luminescence quantum efficiency. An electrochemical luminescence transition area can be narrowed by 10 times compared with a terpyridyl ruthenium imaging system, and zero-thickness ECL luminescent layer cell high-resolution imaging can be realized; good application prospects are realized in the fields of fluorescence detection, electrochemical luminescence detection, fluorescence imaging, electrochemical luminescence imaging and the like.

The invention discloses an immunosensor for detecting Alzheimer's disease neurofilament light chain protein based on a two-dimensional metal organic framework and a preparation method of the immunosensor, and belongs to the technical field of biological detection sensors. An electrode modified with a RuMOFNSs-Ab2 conjugate and an Au-coated MoS2-Ab1 conjugate is used as a working electrode; the sandwich type electrochemical luminescence immunosensor is based on the two-dimensional RuMOFNSs / Au-coated MoS2, can be used for detecting the blood marker NfL of the Alzheimer's disease, provides a thought for the field of analysis and detection of the NfL, and also provides a reference for clinical medicine detection.

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 belongs to the technical field of polymer films and anti-counterfeiting, and discloses a preparation method of a full-coverage positioning type anti-counterfeiting functional film, a base material layer, a functional layer and a protective layer are obtained at a time through three-layer synchronous extrusion forming, and step-by-step superposition errors are avoided; engraving a code alignment mark on the surface of the thin film, and accurately aligning and curing the micro-lens array and the holographic pattern by combining machine vision positioning and a nanoimprint process; and then carrying out ultraviolet crosslinking treatment to obtain the composite film which simultaneously has a visible anti-counterfeiting pattern, a microscopic optical structure and a near-infrared up-conversion luminescence function. According to the method, the technological process is simplified, the anti-counterfeiting recognition reliability is improved, and the imitation difficulty is effectively improved.

The invention discloses a light-emitting device, a preparation method thereof and a display device. The light-emitting device comprises a light-emitting layer, and the light-emitting layer comprises a quantum dot body, a first ligand and a second ligand; the first ligand is connected with the quantum dot body through a first cross-linking structure; the second ligands are dispersed in the quantum dot light-emitting layer, at least part of the second ligands are connected through a second cross-linking structure, and the polarity of the first ligands is the same as that of the second ligands. The light-emitting layer of the light-emitting device is less in residue in the adjacent sub-pixels, wide in color gamut and good in light-emitting performance; in addition, due to the existence of the second ligand, the combination of the first ligand and the quantum dots can be more stable, and the light-emitting performance of the light-emitting device is more stable.

The application belongs to the field of scintillator material preparation, and particularly relates to a manganese-based pixelated scintillator array and a preparation method and application thereof. The (BuTPP)2MnBr4 scintillator material in a molten state is filled into a quartz glass cavity by capillary action, and a glass scintillator matrix is formed by cooling and quenching; then, in-situ crystallization is realized in the glass scintillator by using femtosecond laser direct writing processing, and a pixelated array is precisely constructed. The in-situ crystallization induced by the femtosecond laser significantly improves the photoluminescence intensity and the radiation luminescence intensity of the material, effectively solves the problems of low luminescence efficiency, high pixelation processing difficulty and poor crystallization controllability of the traditional glass scintillator, and the prepared pixelated scintillator array has stable optical performance and clear pixel boundary, is suitable for X-ray imaging, radiation detection and the like, and has simple preparation process and strong controllability of parameters, thereby providing a new implementation method for the preparation of arrayed X-ray scintillators.

Compositions, articles, systems, and methods for sensing and / or authentication using luminescence imaging are generally provided. In some embodiments, the article is associated with an emissive material comprising an emissive species. In some embodiments, the emissive species has a radiative lifetime of at least 10 nanoseconds. A characteristic of the article may be determined by acquiring an image comprising time-dependent information related to the emissive species. In certain cases, the radiative lifetime of the emissive species may be determined from the image. Because the radiative lifetime of an emissive species may be modified by numerous factors, including, but not limited to, binding to or proximity to other molecules, temperature, pH, and radiation exposure, the measured length of the radiative lifetime may provide information regarding a characteristic of the associated article. In some cases, the emissive material comprising one or more emissive species may be used to identify and / or authenticate the associated article.

1. Name of the product in this design: Quick Clip (JQ503Z). 2. Application of this design: Quick-release handles with locking function for test chambers, ovens, drying ovens, constant temperature chambers, luminescence equipment, etc. 3. The key design feature of this product is its shape. 4. The picture or photo that best illustrates the key design points: Design 1 3D diagram 1. 5. Design 1 is designated as the basic design.

The invention discloses a multi-cycle laminated Si-based InAs / GaAs quantum dot array structure and a preparation method thereof. The multi-cycle laminated Si-based InAs / GaAs quantum dot array structure comprises a Si substrate; the SiO2 mask layer covers the Si substrate, and the SiO2 mask layer is provided with a circular hole array which is arranged in a matrix and is used for exposing a Si substrate area below the SiO2 mask layer; a GaAs nanowire buffer layer and a plurality of periodically stacked InAs / GaAs vertical coupling quantum dot units are sequentially grown on the Si substrate exposed in each circular hole from bottom to top; each unit comprises a GaAs nanowire layer, an InAs quantum dot layer, an In < x > Ga < 1-x > As cover layer and a GaAs cover layer which are sequentially stacked from bottom to top; and the epitaxial structure also comprises an AlyGa1-yAs cladding layer which coats the side surfaces of all the epitaxial layers in the circular hole. A plurality of periodically stacked InAs / GaAs vertical coupling quantum dot units constructed by the invention effectively inhibit the lateral diffusion of In atoms, and solve the problem of blue shift of light-emitting wavelength; the light-emitting wavelength can be accurately regulated and controlled to a 1.3 [mu] m communication wave band.

The application discloses a SiO2-coated negative thermal expansion film and application thereof, and belongs to the technical field of temperature measurement. 12 :Nd 3+ The precursor solution is calcined to obtain the negative thermal expansion film, and then SiO2 solution is added dropwise on the negative thermal expansion film to obtain the SiO2-coated Yb2W3O 12 :Nd 3+ The SiO2-coated negative thermal expansion film is loaded on the opal template. 12 :Nd 3+ As a matrix, the SiO2 coating does not affect the luminescence of the negative thermal expansion film, and makes the Yb2W3O 12 :Nd 3+ The luminescence of the film in the near infrared is significantly enhanced. In addition, compared with the negative thermal expansion material film without the SiO2 coating, the negative thermal expansion material film is more sensitive to temperature.

Disclosed herein is a methodology which quickly provides for the analysis of multiple luminescence decays from individual phosphor samples. The disclosed method utilizes a Trust-Region method to provide non-physical solutions when the fitting application was not provided with bounds for the respective intensities and decay times. Results from Double Decay were found to be statistically similar to data analyzed in methodologies known in the art.

The utility model relates to the technical field of warning boards, in particular to a self-luminous road danger warning board which comprises a bottom board. The top of the bottom plate is fixedly connected with the mounting frame, a storage battery is arranged at the top of the mounting frame, a warning lamp is arranged at the top of the mounting frame, a solar panel is arranged at the top of the mounting frame, and the adjusting assembly is arranged at the bottom of the bottom plate; a first motor drives an eccentric rotating plate to rotate in a supporting plate, the eccentric rotating plate drives a second gear outside a groove plate to rotate in the supporting plate in a reciprocating mode, at the moment, the second gear drives a third gear outside a first gear to move externally, and the third gear drives a fourth gear on the inner side of a toothed belt to move in a reciprocating mode; therefore, the first self-luminous warning board and the second self-luminous warning board are driven by the third gear and the fourth gear to swing in the mounting frame in a reciprocating mode, attention of passers-by is attracted, the warning function is improved, and the passers-by is prevented from entering a dangerous site by mistake.

The invention discloses an ABX3 type perovskite material stabilized by a liquid crystal material and a preparation method of the ABX3 type perovskite material, and belongs to the field of semiconductor photoelectric materials and energy materials. The preparation method comprises the following steps: (1) uniformly mixing lead iodide and dodecyl dimethyl benzyl ammonium bromide, and carrying out heat treatment reaction to obtain a liquid crystal material solid; (2) dissolving the obtained liquid crystal material solid in an organic solvent to obtain a precursor solution; and (3) coating the surface of the ABX3 type perovskite thin film with the obtained precursor solution to obtain the ABX3 type perovskite material stabilized by the liquid crystal material. The ABX3 type perovskite which is high in quality and ultrahigh in stability is prepared through the method, the stability and the photoelectric property of the perovskite material are improved in order of magnitude, and the ABX3 type perovskite can be widely applied to the photoelectric fields of batteries, light emitting, detectors and the like; the preparation method has the characteristics of simplicity, easiness in control, convenience in operation, lower cost and the like, and is convenient for large-scale production in factories.