3821 results about "Luminescent material" patented technology

The invention discloses a double-boron polycyclic compound for an organic electroluminescent device, and belongs to the technical field of organic electroluminescent materials. The double-boron polycyclic compound takes a spiro derivative as a center B atom to be directly bonded with N, O, S and Se, has relatively high singlet and triplet energy, proper HOMO and LUMO energy levels and relatively small singlet-triplet energy difference, and can be used as a luminescent material to be applied to an organic electroluminescent device to improve the luminous efficiency of the device and improve the color purity of the device. After the double-boron polycyclic compound is applied to an OLED as a luminescent material, the relative value of external quantum efficiency of a luminescent device is 105.6%-126.9%, the half-peak width is 22-29 nm, and compared with an OLED using BD01 as the luminescent material, the luminescent efficiency is obviously improved, the half-peak width of an emission spectrum is narrower, and the color purity is higher. The invention provides an MR-TADF material for improving the color purity of a blue light device.

The invention belongs to the field of organic photoelectric materials, and discloses an electroluminescent material and a preparation method and application thereof. The structure of the electroluminescent material is as shown in a formula I: # imgabs0 #. According to the electroluminescent material compound provided by the invention, on the basis of a 9-methyl-9-phenylfluorene group, triarylamine and an aromatic ring are connected through 2 and 4 sites, when the triarylamine group is substituted by aryl, the energy level is relatively low, carrier migration localization is avoided, and a hole transport energy barrier can be reduced, so that the migration rate and the luminous efficiency are improved; triarylamine has excellent hole transport performance, a triarylamine material is used as a light-emitting auxiliary layer, a group with a high triplet state energy level is introduced, the energy range between energy levels can be reduced, and the service life of the device is greatly prolonged.

The invention discloses a display panel and a display device. The display panel comprises a substrate, a pixel definition layer, sub-pixels, separators and a first shading layer. The pixel definition layer is arranged on one side of the substrate, and pixel openings are formed in the pixel definition layer; the sub-pixel is arranged in the pixel opening and comprises a first electrode, a luminescent material layer and a second electrode which are sequentially stacked in a first direction deviating from the substrate; the separators are arranged in the pixel openings and at least divide the light-emitting material layers in the sub-pixels into a plurality of parts; the first shading layer is arranged on the side, away from the substrate, of the sub-pixels, and first light-transmitting openings are formed in the portions, corresponding to the sub-pixels, of the shading layer. Through the scheme, the display panel has better peep-proof performance, higher luminous efficiency is ensured, and the influence on the service life and the power consumption is reduced.

The invention belongs to the technical field of medical materials, and relates to a titanium-based implant surface dual drug release system and a preparation method and application thereof. Comprising a titanium-based implant and a hydrogel layer attached to the surface of the titanium-based implant, the surface of the titanium-based implant is of a nanotube array structure, zinc oxide nanoparticles and up-conversion luminescent material particles are arranged between the titanium-based implant and the hydrogel layer, and MgO2 nanoparticles are loaded in the hydrogel layer; wherein the material of the up-conversion luminescent material particles is NaYF4: Yb < 3 + >, Er < 3 + >, and the hydrogel layer is composed of gelatin-sodium alginate hydrogel. The titanium-based implant surface dual-drug release system provided by the invention can realize loading of different drugs, can be used for treating various diseases, has a better time sequence control effect, is long in action time and low in cost, and has a wide application prospect.

The invention discloses a luminescent material composition, ink, a luminescent device and a display device. The luminescent material composition provided by the invention comprises the host material with gradient energy level distribution and the exciplex capable of generating gradient energy distribution, during energy transfer, part of higher energy is not transferred to the guest material while higher energy is transferred to the guest material, and under the condition that lower energy with higher energy exists, the luminescent material composition can be used for generating the exciplex with gradient energy level distribution. The part of higher energy which is not transmitted to the guest material can be transmitted to the higher energy which is lower energy, and so on, on one hand, the loss of energy which is not transmitted to the guest material can be effectively reduced, large-area energy accumulation is avoided, and the service life of a light-emitting device prepared from the light-emitting material composition is effectively prolonged; and charge balance can be effectively promoted, so that the service life of a light-emitting device prepared from the light-emitting material composition is prolonged.

The invention discloses an organic electroluminescent compound and a luminescent device. The organic electroluminescent compound has a structure as shown in a formula (1). In the structure of the N-type compound provided by the invention, an electron-rich group formed by carbazole and phenyl connected with the carbazole is substituted by deuterium, and the deuterated P-type compound in the core region is matched, so that the chemical stability, photoelectric stability and thermal stability of the structure of the luminescent material can be effectively improved, the stability of a luminescent device using the material is further improved, and the service life of the luminescent device is prolonged; meanwhile, the N-type compound and the deuterated P-type compound in the core area can form a good Premix material, good P / N stability and mass production stability are achieved in the evaporation process, the formed Premix material has more balanced carrier mobility, the efficiency of a device is greatly improved, and the service life of the device is greatly prolonged. And # imgabs0 #.

The invention provides a display panel and a display device.The display panel comprises a display area and a non-display area located on at least one side of the display area, the display area is provided with a plurality of light-emitting pixel units, and the non-display area is provided with at least one virtual pixel unit. The area of the virtual pixel units is larger than that of the light-emitting pixel units of the display area, and the maximum film-forming height difference of the virtual pixel units is larger than that of the light-emitting pixel units, so that when the film-forming light-emitting material layer is formed through ink-jet printing, the film-forming height difference of the virtual pixel units is larger than that of the light-emitting pixel units. The area where the large-area virtual pixel units are formed can contain more printing ink, so that a large amount of solvent atmosphere is created in the area to eliminate the influence of non-uniform vacuum drying, and the film forming uniformity of the light-emitting pixel units in the display area is further improved.

The invention provides a display panel and a display device.The display panel comprises a display area and a non-display area located on at least one side of the display area, the display area is provided with a plurality of light-emitting pixel units, and the non-display area is provided with at least one virtual pixel unit. The area of the virtual pixel units is larger than that of the light-emitting pixel units of the display area, and the maximum film-forming height difference of the virtual pixel units is smaller than that of the light-emitting pixel units. The area where the large-area virtual pixel units are formed can contain more printing ink, so that a large amount of solvent atmosphere is created in the area to eliminate the influence of non-uniform vacuum drying, and the film forming uniformity of the light-emitting pixel units in the display area is further improved.

The invention discloses a high-efficiency near-infrared two-region aggregation-induced emission material, a preparation method thereof and application of the high-efficiency near-infrared two-region aggregation-induced emission material in bimodal surgical navigation. According to the molecular structure, the organic near-infrared two-region material with an intramolecular charge transfer characteristic is constructed by taking thionaphthalene tetracarboxylic acid diimide as an electron acceptor group and tetraphenylethylene as a molecular rotor and an electron donor unit. By expanding the length of a pi conjugate fragment and introducing an isotope effect, the oscillator strength can be improved, and high-frequency vibration can be inhibited, so that the radiative transition rate of molecules is promoted, and the non-radiative transition rate is inhibited. The nanoparticles prepared from the aggregation-induced emission material have the advantages of high brightness, large Stokes shift and good light stability, and have an excellent effect in bimodal imaging guided mouse in-situ breast cancer and sentinel lymph node operation excision.

The invention belongs to the technical field of environmental monitoring, and particularly relates to a super-resolution fluorescence imaging analysis method based on hypersensitive fluorescent quantum dots. The quantum dots have high water solubility and stability, and can emit narrow-bandwidth fluorescence due to unique optical properties of the quantum dots. According to the invention, a quantum dot luminescent material is adopted to construct an ultra-high resolution microscope system which can be used for observing composite behaviors between micropollutants and quantum dots on a microscopic scale, and a three-dimensional fluorescence microspectrometer and a computer vision algorithm are integrated; the whole reaction process is deduced according to the evolution of the three-dimensional fluorescence spectrum between the micro-pollutants and the quantum dots in different space (concentration), time (reaction process) and chemical dimensions, and a multi-dimensional fingerprint spectrum is formed according to the whole reaction process and is used for identifying and tracing the micro-pollutants. The method has the advantages of being high in detection speed, high in fingerprint performance and less in interference of background factors.

The invention discloses a display substrate, a display panel and a display device. The display substrate comprises a substrate body, a plurality of sub-pixels and a pixel limiting layer, the sub-pixels are located on the substrate body, each sub-pixel comprises a light-emitting functional layer, a first electrode and a second electrode, the first electrode and the second electrode are located on the two sides of the light-emitting functional layer in the direction perpendicular to the substrate body, the first electrode is located between at least part of the light-emitting functional layer and the substrate body, and the second electrode is located between at least part of the light-emitting functional layer and the pixel limiting layer. The pixel limiting layer is located between the light-emitting functional layer and the substrate, the pixel limiting layer comprises a plurality of pixel openings and pixel limiting parts located between the adjacent pixel openings, the pixel openings expose at least part of the first electrode, and the light-emitting functional layer makes contact with the first electrode through the pixel openings; a slope angle of 25-35 degrees is formed between at least part of the surface, located on the first electrode and far away from the substrate, of the pixel limiting part and the first electrode, so that scratch of a mask to a light-emitting material in the pixel opening can be reduced, and the product reject ratio caused by the scratch problem is reduced.

The invention provides an electroluminescent material composition and an organic electroluminescent device.The electroluminescent material composition comprises a combination of a first organic electroluminescent material and a second organic electroluminescent material, and through structural design and synergistic compounding of the two kinds of organic electroluminescent materials, the organic electroluminescent material composition is prepared. The electroluminescent material composition has excellent photoelectric properties and carrier transport properties, realizes balanced transport of carriers, is used for organic electroluminescent devices, is especially suitable for being used as a main body material of a luminescent layer, regulates injection / transport balance of holes and electrons, prevents a large amount of carriers from being accumulated at an interface, and improves the luminous efficiency of the organic electroluminescent devices. The device has excellent luminous efficiency and stability, the service life of the device is remarkably prolonged, the starting voltage is lower, the comprehensive performance of the device is effectively improved, and the requirements for high-performance materials in current panel and display manufacturing are fully met.

Disclosed is a luminescent material with a polycyclic ligand. The luminescent material is a metal complex with a polycyclic ligand, which can be used as a luminescent material in an electroluminescent device. These novel metal complexes can better adjust the luminescent color of the device while maintaining a very narrow half-peak width, reduce the driving voltage of the device or maintain a low voltage level, improve the device efficiency, greatly increase the device life, and provide better device performance. Also disclosed is an electroluminescent device and a compound combination.

The invention provides a method for providing composite luminescent particles, comprising: (a) providing (i) a luminescent material, comprising (A1-xBx)3(C1-yDy)5O12 nanoparticles or a precursor therefor, wherein A comprises one or more of yttrium, lutetium, gadolinium, lanthanum; B comprises one or more rare earth elements; C comprises one or more of aluminum, gallium, and scandium; D comprises one or more transition metal ions; and wherein 0≤x≤1, 0≤y≤1, and x+y>0; and (ii) further providing a precursor of an oxide material, wherein said oxide material has a melting point of at least 850°C; (b) mixing said (i) luminescent material comprising (A1-xBx)3(C1-yDy)5O12 nanoparticles or a precursor therefor and (ii) said precursor of an oxide material; (c) curing said precursor of said oxide material to obtain a cured particle, said cured particle comprising said luminescent material, and a coating of said oxide material; (d) heating said cured particle at a first temperature for a first duration, wherein said first temperature is 600 °C or higher, wherein said first duration is 10 minutes or more; and (e) heating said cured particle under a reducing atmosphere comprising carbon monoxide at a second temperature for a second duration, wherein said second temperature is 700 °C or higher, and wherein said second duration is 1 hour or more.

The invention belongs to the technical field of organic light-emitting materials, and relates to a boron-containing polycyclic compound for an organic light-emitting material. According to the invention, aryl or heteroaryl is taken as a center, 2-3 boron atoms are introduced and form covalent bonds with atoms such as N, O, S and Se, and a rigid polycyclic compound is constructed. The compound provided by the invention is a boron-containing polycyclic compound with multiple resonance effects, can realize narrow-spectrum and high-color-purity luminescence, also has efficient TADF characteristics, and significantly improves the performance of OLED devices. Compared with the prior art, the compound has remarkable advantages in the aspects of molecular structure design, photoelectric property regulation and control, application range and the like, provides important technical support for development of new-generation high-performance OLED materials, and has wide market prospects and application potential.

The invention is suitable for the technical field of inorganic luminescent materials, and provides a fluorescent powder material based on a double-perovskite structure and a preparation method and application thereof. The general chemical formula of the fluorescent powder is Ca2AlNbO6: xEu < 3 + >, wherein x is a molar fraction of 0.06 to 0.30; the excitation spectrum coverage range of the fluorescent powder under the condition of monitoring the emission wavelength of 615 nm is 260-500 nm, and the emission main peak is located at 615 nm; when x is equal to 0.18, the quantum efficiency under the excitation of 396nm ultraviolet light is greater than or equal to 91%, and the red light emission ratio is greater than or equal to 85%. According to the invention, Ca2AlNbO6 double perovskite is taken as a substrate, and a red fluorescent powder material with wide-spectrum excitation and high quantum efficiency is designed through Eu < 3 + > high-concentration doping and local symmetry regulation and control design engineering, so that the characteristics of high quantum efficiency, efficient red light emission, wide-spectrum excitation and excellent concentration quenching resistance are realized.

The invention relates to the technical field of luminescent materials, and discloses a preparation method and application of a transition metal and chalcogen ion doped metal halide high-efficiency wide-spectrum luminescent material, the chemical formula of the transition metal and chalcogen ion doped metal halide is Cs2Sn1-x-yCl6: x% Te < 4 + >, yMo < 4 + >, the ultra-wideband fluorescent powder converted light emitting diode (LED) covers the range from visible light (VIS) to near infrared light (NIR), and shows remarkable potential in practical application. According to the invention, ultra-wide spectrum emission from 400 nm to 1400 nm is realized in Mo < 4 + >-Te < 4 + > co-doped Cs2SnCl6, and the photoluminescence quantum yield of 95.3% is achieved, the excellent performance is realized through efficient energy transfer from Te < 4 + > to Mo < 4 + > and passivation synergistic effect of vacancy defects, and the performance can be verified through theoretical calculation and spectral research; finally, the ultra-wideband fluorescent powder conversion LED based on the Mo < 4 + > and Te < 4 + > co-doped Cs2SnCl6 is successfully prepared and is applied to the fields of blood gas analysis and night vision imaging.

The invention discloses an organic electroluminescent material and a device thereof. The organic electroluminescent material is a compound with a structure as shown in a formula 1. The novel compounds can be used as luminescent materials in organic electroluminescent devices, and can provide better device performance, such as very narrow half-peak width and very high current efficiency and external quantum efficiency. The invention further discloses an organic electroluminescent device containing the compound with the structure shown in the formula 1 and a compound composition.

The invention provides a near-infrared fluorescent material activated by Sm < 2 + > as well as a preparation method and application of the near-infrared fluorescent material. The chemical composition of the fluorescent material is Si < 2-x > Al < x > N < 2 + y > O < 1-y >: Mz, Smm, Lnn, m in the formula is one or more elements of Ba, Sr, Ca and Mg; ln is one or more elements of Bi, Yb, Eu, Nd, Gd, Tb, Dy, Ho, Er, Tm and Pr; 0 < = x < = 0.2, 0.1 < = y < = 0.5, 0 < = z < = 0.5, 0 < = m < = 0.15, and 0 < = n < = 0.1. The luminescent material provided by the invention has a brand new chemical composition, takes Sm < 2 + > as an activation center, and shows a near-infrared luminescence behavior in a gap occupation manner. The fluorescent material can be excited by light within the wavelength range of 300-600 nm, so that narrow-band near-infrared light of 681 nm is emitted, and therefore, the fluorescent material can convert ultraviolet light, purple blue light and green light into near-infrared light. The near-infrared fluorescent material provided by the invention has the advantages of convenient synthesis method and stable chemical properties, and is suitable for the fields of biological imaging, plant growth illumination, white light LEDs, temperature sensors and the like.

The invention discloses a performance optimization method and system for an organic light-emitting material, and relates to the related technical field of light-emitting material optimization, and the method comprises the steps: preparing an initial OLED material sample set according to a preset formula; building a real-time monitoring platform, and carrying out luminescence performance monitoring according to a preset luminescence performance index; carrying out intensive screening on the sample luminescence performance index data set, and determining data representing the sample luminescence performance indexes; and carrying out directional optimization on the thickness and the doping ratio of the functional layer in the preset formula by taking the standard luminescence performance index data as a constraint, obtaining an optimized formula, and carrying out OLED material preparation. The technical problems that in the prior art, OLED material preparation depends on an empirical formula, performance monitoring is not accurate, functional layer parameters and the doping proportion are difficult to effectively optimize, the OLED material is poor in light-emitting performance, and the service life of a device is short are solved, and the technical effects of improving the light-emitting performance of the OLED material and prolonging the service life of the device are achieved.

The invention belongs to the technical field of light-emitting materials, and particularly relates to a near-infrared light-emitting ytterbium-doped quantum dot material and a preparation method and application thereof. According to the preparation method of the near-infrared light-emitting ytterbium-doped quantum dot material, a Yb-doped perovskite quantum dot synthesis method which is high in near-infrared light-emitting intensity, good in stability and simple in preparation is innovatively provided, short-chain amine is used in the preparation process, and the near-infrared light-emitting ytterbium-doped quantum dot material has high reaction activity, small steric hindrance and high near-infrared light-emitting efficiency. The complex ability with precursor raw materials is low, chemical bonds between halogen and metal ions are easy to open in the reaction process, and the complex is matched with long-chain amine (such as oleylamine and the like) in a perovskite quantum dot system prepared by a conventional injection method, so that doping of rare earth Yb ions is facilitated, the Yb ions smoothly enter perovskite crystal lattices, and the perovskite quantum dot is prepared. The near-infrared luminous intensity of the material is improved.

The invention relates to the technical field of OLED (Organic Light Emitting Diode) luminescent materials, in particular to an anthracene azepine material as well as a preparation method and application thereof, and the structure of the anthracene azepine material is as shown in the following formula: # imgabs0 #, r is any one of a deuterated terphenyl group, an isoquinolyl group, a piryl group, a 9, 9-diphenyl fluorenyl group, a dibenzothienyl group and a deuterated N-phenyl carbazolyl group. The parent structure of the anthracene-azepine material has anthracene, deuterated carbazole, azepine structures and the like, and intramolecular large steric hindrance space distorted structures, so that the spin-orbit coupling effect between different excited states is remarkably improved, the molecules are greatly limited during relaxation, and finally, the device realizes dark blue light emission, and has wide application prospects. The introduced aryl heterocyclic structure can greatly improve the stability of the material, and meanwhile, the deuterated structure can obviously prolong the service life of the device and obviously improve the luminous efficiency of the device.

The invention relates to Eu (II) doped double perovskite red fluorescent powder as well as a preparation method and application thereof, and belongs to the technical field of inorganic luminescent materials. According to the red fluorescent powder capable of being excited by the blue light, disclosed by the invention, high-performance red light emission is realized by doping Eu < 2 + > with an oxide Sr2B1-xB 'O6 (wherein B is lutetium (Lu), B' is tantalum (Ta) or niobium (Nb), and x is greater than or equal to 0.01 and less than or equal to 0.10 as a matrix). The novel red fluorescent powder can be applied to white light LED illumination. When the fluorescent powder is used in combination with green light or yellow light fluorescent powder in the prior art, efficient white light is expected to be realized under the excitation of blue light, so that the color rendering performance of a white light LED is absolutely improved.

The invention relates to the technical field of luminescent materials, and discloses an aggregation-induced emission material, nanoparticles as well as a preparation method and application thereof, the structural general formula of the aggregation-induced emission material is as follows: # imgabs0 #, R is selected from one of the following structures: # imgabs1 # aggregation-induced emission material takes a pyridine group as an acceptor unit, and the acceptor unit is selected from one of the following structures: 1 # imgabs2 # aggregation-induced emission material; a carbon-carbon double bond and a thiophene unit are used as pi bridges, and diphenylamine, bis (4-ethylphenyl) amine and bis (4-(tert-butyl) phenyl) amine are used as strong electron donors. The donors not only provide strong electron supply ability, but also become efficient rotors due to highly twisted molecular conformation, and endow the aggregation-induced emission material with long emission wavelength and aggregation-induced emission activity.

The invention discloses a red up-conversion luminescent material, which belongs to the field of inorganic luminescent materials, the chemical formula of the material is NaEr < 0.65 > F4: Yb < 0.2 > / Gd < 0.1 > / Tm < 0.05 >, and up-conversion microparticles of the red up-conversion luminescent material are used as a bifunctional luminescent temperature sensor which can be used for a 293348 K low-temperature region sensitization sensor and a 348498 K high-temperature region thermal quenching sensor. After near-infrared light with the wavelength of 980 nm excites Yb < 3 + > ions, through efficient energy transfer between Er < 3 + > and Tm < 3 + >, different changes of near-infrared response type 654 nm and 808 nm red up-conversion luminescence characteristics can be used for non-contact optical temperature measurement under the extreme temperature condition. Temperature detection is realized based on thermal coupling energy levels of 4F9 / 2 to 4I15 / 2 and 3H4 to 3H6, and the distance between two emission peaks is large, so that the data processing error is greatly reduced; excitation light and emission light are located in an optical window of the biological tissue, and absorption and self-fluorescence of the biological tissue are greatly reduced. The preparation method is based on the green chemistry concept, takes water as a solvent and adopts a one-step hydrothermal method for synthesis, the preparation method is simple, the required temperature is low, the preparation process is easy to control, the material crystal phase is good, the phase is uniform, the yield is high, the material performance is stable, and the good temperature response effect is achieved.

The embodiments of the present disclosure provide a display panel, including: a base substrate, a first electrode layer, a luminescent material layer, a second electrode layer, an elastic lens layer and at least one light wavelength conversion layer arranged in sequence. The luminescent material layer is configured to emit an excitation light, the at least one light wavelength conversion layer is configured to convert the excitation light emitted from the luminescent material layer into light of a predetermined color, and the elastic lens layer is configured to converge the excitation light emitted from the luminescent material layer. The embodiments of the present disclosure further provide an electronic device and a method of manufacturing a display panel.

The present disclosure teaches an article of manufacture using an industrial (or commercial) manufacturing process. The article of manufacture comprises an infrared (IR) luminescent material that emits in the IR wavelength range (e.g., from approximately seven-hundred nanometers (˜700 nm) to approximately one millimeter (˜1 mm)) after being excited by incident wavelengths of between ˜100 nm and ˜750 nm (or visible light). In other words, once the material has been exposed to visible light, the material will continue to emit in the IR wavelength range for a period of time, even when the material is no longer exposed to the visible light.

The invention provides a sulfur-containing boron-nitrogen compound and application thereof, the sulfur-containing boron-nitrogen compound has a structure as shown in a formula I or a formula II, the boron-nitrogen compound has a narrow spectrum, and is used as a luminescent material for preparing a luminescent layer of an organic electroluminescent device, and the prepared organic electroluminescent device shows high efficiency and high stability, and can be used as a luminescent material for preparing a luminescent layer of the organic electroluminescent device. Meanwhile, the emission spectrum of the device is narrow, the electroluminescence belongs to emission from orange red light to near infrared light, and the highest external quantum efficiency of electroluminescence of the device is as high as 20% or above.

The invention provides a luminescent material containing a cyclobutadiene structure, and a preparation method and application thereof, and relates to the technical field of organic electroluminescent materials. According to the cyclobutadiene-containing luminescent material provided by the invention, the anti-aromatic cyclobutadiene is fused into a binary nitrogen-containing fused heterocyclic skeleton, and excitation state vibration relaxation is inhibited by using the special electronic structure and high ring tension of the anti-aromatic cyclobutadiene, so that narrow-band luminescence is realized. By introducing the steric hindrance effect group, the aggregation fluorescence quenching phenomenon between luminescent parent nuclei is weakened, and the fluorescence quantum yield is improved. Different from a current mainstream multi-resonance mechanism, the design of the narrow-spectrum light-emitting molecule provided by the invention does not need to depend on the construction of a B / N-fused ring, and the molecular structure can be simplified to realize full-light-color ultra-narrow-band light emission. When the organic light-emitting diode is applied to an organic light-emitting device, an ultra-narrow full-width-at-half-peak electroluminescent spectrum and high device efficiency can be realized, and a better solution is provided for an ultra-high-definition organic light-emitting diode display technology.

The invention belongs to the technical field of luminescent materials, and particularly relates to a luminescent material, an anti-counterfeiting optical thin film and a preparation method thereof. The chemical general formula of the luminescent material is SrGa < 12-x > Mn < x > O < 19 > / Ga < 2 > O < 3 >, and x is equal to 0.025 to 0.035. The preparation method of the anti-counterfeiting optical thin film comprises the following steps: uniformly mixing a luminescent material, a PDMS polymer and a curing agent to obtain colloid, and curing to obtain the optical thin film, the mass ratio of the luminescent material to the PDMS polymer is 1: (0.65-1.5), and the mass ratio of the PDMS polymer to the curing agent is (9-10): 1. The invention overcomes the defects that inorganic fluorescent powder in the prior art only has one light-emitting mode of photoluminescence, is poor in anti-counterfeiting effect and is easy to counterfeit.