39results about How to "High light conversion efficiency" patented technology

The invention relates to the technical field of photovoltaic cells, and provides copper electrode slurry, a metal electrode, a preparation method of the metal electrode and a photovoltaic cell. The copper electrode slurry comprises a metal composition, a dispersion reducing agent, a composite curing agent and an optional solvent, the metal composition at least comprises copper powder and optional gold powder and / or silver powder; the composite curing agent comprises thermosetting resin and a latent curing agent; wherein the mass ratio of the metal composition to the composite curing agent is (7-30): 1. The copper electrode paste provided by the invention replaces expensive silver paste, so that the manufacturing cost of a solar cell energy electrode is greatly reduced. According to the method for preparing the metal electrode, the position of the copper electrode can be precisely machined, damage to the amorphous silicon layer is avoided, remelting and solidification of the copper electrode are achieved through multiple times of laser scanning, and the problem that the adhesive force between the copper electrode and the substrate is poor is effectively solved.

The embodiment of the invention relates to the field of photovoltaic technology, and provides a solar cell and a preparation method thereof, the solar cell comprises a substrate, the substrate is provided with a first surface and a second surface which are opposite, at least one of the first surface and the second surface is provided with a suede, the suede is composed of a plurality of pyramid structures, and the side wall of at least part of the pyramid structures is provided with a wrinkle part; the wrinkle part is composed of a plurality of scaly protrusions, in the direction from the top of the pyramid structure to the bottom of the pyramid structure, the length of the wrinkle part is a first length, the length of the side wall of the pyramid structure is a second length, and the ratio of the first length to the second length is larger than or equal to 0.5. According to the solar cell and the preparation method thereof provided by the embodiment of the invention, the light reflectivity of the solar cell is at least reduced, so that the light conversion efficiency of the solar cell is improved.

The present invention relates to a coating composition for forming a UV light conversion coating for a photovoltaic cell, a UV light conversion coating prepared therefrom, a method for preparing the UV light conversion coating, and a photovoltaic cell and a photovoltaic module comprising the coating. The composition comprises by mass: (A) 100 parts of a first epoxy resin that is liquid at room temperature, which is an epoxy resin containing at least two glycidyl ether groups per molecule on average; (B) 33-66 parts of a second epoxy resin that is liquid at room temperature, which is an alicyclic epoxy resin containing at least two epoxy cycloalkyl groups per molecule on average; (C) 33-66 parts of a vinyl ether monomer that is liquid at room temperature; (D) 6-16 parts of a cationic initiator; (E) 3-15 parts of a UV light conversion agent; and (F) 0-200 parts of an inert diluent. The light conversion coating prepared by the coating composition can reduce the UV band light transmittance and increase the visible light wavelength transmittance when used in a photovoltaic cell or a photovoltaic module, improve the light conversion efficiency and have excellent adhesion and aging resistance.

The invention relates to the technical field of photovoltaic cells, and provides a solar cell and a preparation method thereof, the solar cell comprises a silicon substrate and a transparent conductive film, the transparent conductive film is provided with a periodic nanostructure array, and the solar cell also comprises a metal electrode arranged on the surface of the transparent conductive film, the metal electrode is prepared by adopting copper electrode slurry and a laser process. The periodic nanostructure array modified layer is prepared on the conductive thin film, so that the surface area and the conductivity of the transparent conductive thin film can be increased, the absorption and reflection of the transparent conductive thin film to light are improved, and the efficiency of the solar cell is improved; and the binding force of the electrode can be increased, and the durability and the stability of the solar cell are improved. According to the preparation method of the solar cell provided by the invention, the position of the copper electrode can be precisely processed, the problem of precision of current silk-screen printing is solved, the damage to the amorphous silicon layer can be avoided, the prepared copper electrode has a relatively large height-width ratio, and the light conversion efficiency can be effectively improved.

The invention relates to the technical field of photovoltaic cells, and provides a laser processing device, a method for preparing a metal electrode and a photovoltaic cell. According to the laser processing system, remelting and solidification are carried out while selective metallization is carried out, the internal stress of the electrode is released while the adhesive force is increased, and the porosity can be effectively reduced; in addition, the technological process can be simplified, the problem that the secondary machining position is difficult to calibrate is solved, and the machining efficiency is improved. According to the method for preparing the metal electrode, the position of the copper electrode can be precisely machined, the problem of precision of current silk-screen printing is solved, damage to the amorphous silicon layer can be avoided, the prepared copper electrode has the large height-width ratio, and the light conversion efficiency can be effectively improved.

The invention discloses a laser beam combining device and method, the laser beam combining device comprises a plurality of laser units, a wave locking assembly and a beam combining assembly, and the laser units are used for outputting light beams; the wave locking assembly comprises a beam splitter and a grating, the grating is arranged at the reflecting end of the beam splitter, a light beam output by the laser unit is emitted to the beam splitter, and wavelength locking is carried out through the grating; the beam combining assembly is used for combining the light beams output by the wave locking assembly in pairs step by step until the light beams output by all the laser units are combined into one beam; the beam combining assembly comprises a polarization state conversion device, a reflecting mirror and a polarization beam combining device, the polarization state conversion device is used for adjusting the polarization direction of the light beams, and the reflecting mirror is used for adjusting the light paths of the light beams so that the two light beams in the same group can enter the polarization beam combining device; and the polarization beam combining device is used for combining the two light beams subjected to polarization direction and light path adjustment. The light-to-light conversion efficiency is high, the light spot brightness after beam combination is improved, and the light beam quality is improved.

The present invention provides a Fe 3+ Doped near-infrared luminescent material, preparation method and application thereof. The general formula of the near-infrared luminescent material is as shown in Formula I. 3+ As the activating ion, antimonate A2M 1‑x SbO6 (0<x≤0.05) is used as the matrix material, wherein Fe 3+ By replacing the position of some elements M in the matrix material, Fe 3+ The ratio of Fe to element M makes the luminescent material have strong emission intensity and broad emission peak in the near infrared range, high thermal stability and stable chemical properties. 3+ As an activated ion, it is non-toxic, harmless and cheap, and is easy to realize industrial production.

The invention discloses a device for converting intense pulsed light by using a cerium-doped YAG (yttrium aluminum garnet) crystal and medical beauty equipment. The conversion device comprises a pulse xenon lamp used for emitting strong pulse light with a preset wavelength; the cerium-doped YAG wafer is arranged on the light emitting side of the pulse xenon lamp and used for absorbing ultraviolet light and blue light with the wavelength range of 300-500 nm in the strong pulse light and converting the ultraviolet light and the blue light into yellow-green light with the wavelength range of 500-700 nm; the filter plate is arranged on the light emitting side of the cerium-doped YAG wafer and is matched with the wave band of the cerium-doped YAG wafer so as to filter light rays of other wave bands; and the light guide part is arranged on the light emitting side of the filter and is used for light conduction and light energy output. According to the conversion device, the cerium-doped YAG wafer is arranged between the pulse xenon lamp and the optical filter, so that ultraviolet light and blue light with the wavelength range of 300-500 nm in strong pulse light are absorbed and converted into yellow-green light with the wavelength range of 500-700 nm, and the situation that the energy utilization efficiency is reduced due to the fact that the ultraviolet light and the blue light are directly filtered out is avoided.

The invention belongs to the field of photovoltaic materials. The invention relates to a macromolecular light conversion agent and a preparation method thereof, and a photovoltaic packaging light conversion adhesive film, the preparation method of the macromolecular light conversion agent comprises the following steps: carrying out substitution reaction on benzotriazole and liquid bromine to obtain an intermediate product I; carrying out substitution reaction on the intermediate product I and bromo-ester to obtain an intermediate product II; carrying out coupling reaction on the intermediate product II and a vinyl phenylboronic acid derivative to obtain an intermediate product III; carrying out substitution reaction on bromofluorene and alkyl bromide to obtain an intermediate product IV; carrying out coupling reaction on the intermediate product IV and a vinyl phenylboronic acid derivative to obtain an intermediate product V; and carrying out free radical polymerization reaction on the intermediate product III and the intermediate product V to obtain the macromolecular light conversion agent. Through the self-made macromolecular light conversion agent, the problems of narrow and single absorption peak, low light utilization rate, poor stability, easiness in precipitation and the like of the conventional organic light conversion agent benzotriazole for the photovoltaic plugging eye gel film are effectively solved.

The invention discloses a g-C3N4 (at) Zn / Eu-MOF composite dual-energy light conversion agent and a preparation method thereof, and a dual-energy light conversion film and a preparation method thereof. The preparation method comprises the following steps: firstly, preparing g-C3N4 by high-temperature calcination of melamine; secondly, preparing Zn / Eu-MOF through a hydrothermal reaction of europium nitrate, zinc nitrate, trimesic acid and DMF; and finally, dissolving g-C3N4 in ethanol, carrying out ultrasonic treatment, adding Zn / Eu-MOF, and stirring for a certain time to obtain the g-C3N4-Zn / Eu-MOF composite dual-energy light conversion agent. And adding the g-C3N4atZn / Eu-MOF composite dual-energy light conversion agent into a homogeneous aqueous solution of PVA, uniformly stirring, and drying at 40 DEG C to obtain the PVA-based dual-energy light conversion film. The g-C3N4 and Zn / Eu-MOF are combined to obtain the blue light and red light dual-energy composite light conversion material, the light absorption range is widened, and the light absorption performance is improved, so that ultraviolet light is effectively absorbed, efficient conversion of short-wave light is achieved, the light energy utilization efficiency is remarkably improved, meanwhile, the light stability is enhanced, the durability of a PVA-based dual-energy light conversion film in the agricultural environment is enhanced, and the application prospect is wide. And the development of sustainable agriculture can be promoted.

The invention provides a perovskite two-end laminated thin-film solar cell double-glass assembly and a preparation method and application thereof. The perovskite two-end laminated thin-film solar cell double-glass assembly comprises back plate glass, a bottom battery pack string, an insulating layer, a top battery pack string and front plate glass which are sequentially laminated, the bottom battery pack string comprises a plurality of sub-battery units which are sequentially connected in series end to end through a first transparent front electrode and a first back electrode; the top battery pack string comprises a plurality of sub-battery units which are sequentially connected in series end to end through a second transparent front electrode and a second back electrode; confluence conductive bands are laid on the first terminal and the second terminal and are used for confluence and export of carriers out of the battery so as to realize positive and negative electrode communication; the bottom battery pack string and the top battery pack string are connected in series through the double-sided conductive band; and the insulating packaging film is used for isolating the bottom battery pack string from the top battery pack string to realize integral packaging to form the double-glass assembly. According to the device, the top cell and the bottom cell can be connected in series without a tunneling composite layer, a two-end double-junction laminated structure is formed, light utilization can be maximized, and efficiency is improved.

The present invention discloses a quantum dot composite and a preparation method thereof, a quantum dot diffusion plate and a preparation method thereof, and a light-emitting device. The quantum dot composite comprises a solid shell and a liquid core, wherein the liquid core comprises quantum dots, a photoinitiator, and a prepolymer, and the solid shell is formed by photocuring the liquid core. The solid shell is formed by photocuring the liquid core, and the light refractive index of the solid shell and the liquid core is inconsistent, so that the light conversion efficiency of the overall quantum dot composite is improved. The quantum dot composite is evenly dispersed in the main layer, which can effectively improve the light conversion rate and light output brightness of the obtained quantum dot diffusion plate.

The present application relates to a kind of light conversion plate, Mini-LED display device and related preparation method, it is related to semiconductor display technical field.In the preparation method of the light conversion module for Mini-LED display device in the present application, by forming the first surface and the second surface of glass substrate first light conversion block, first light scattering block, second light conversion block and second light scattering block are alternately distributed, wherein the density of light conversion particle in the first light conversion block is greater than the density of light conversion particle in the second light conversion block, the density of light scattering particle in the second light scattering block is greater than the density of light scattering particle in the first light scattering block, by optimizing the structure of each light conversion block and each scattering block and the density relationship of light conversion particle, light scattering particle, light conversion efficiency and light uniformity are greatly improved.

The invention discloses a Bi < 3 + > and Yb < 3 + > co-doped Cs2ZrCl6 double perovskite microcrystal and a preparation method of a light conversion film thereof, and particularly discloses a preparation method of the light conversion film by using an ionic liquid as a solvent, dissolving a cesium salt, a zirconium salt, a bismuth salt and an ytterbium salt in the ionic liquid and carrying out a co-precipitation method to obtain the light conversion film of the Bi < 3 + > and Yb < 3 + > co-doped Cs2ZrCl6 double perovskite microcrystal. The selected ionic liquid promotes interaction with cesium salt, zircon salt, bismuth salt and ytterbium salt due to hydrogen bonds and the like, the solubility of the solutes in the ionic liquid is increased, vacancy defects caused by cation migration of the cesium salt, the zircon salt, the bismuth salt and the ytterbium salt are effectively filled with cation parts of the solutes, the crystallinity of the double perovskite is improved by passivating shallow layer defects, and the performance of the double perovskite is improved. And non-radiative recombination is inhibited, so that efficient and stable photoelectric properties are provided. The light conversion material prepared by the three-layer composite hot pressing method has the advantages of high light conversion efficiency, simple preparation process, low cost and the like.

The present invention relates to the field of laser technology, and in particular to a ring-light pumped fiber laser, comprising: a main body, the outer side of the main body is a ring side, the ring side has a ring groove extending along the circumference of the ring side; a ring-shaped off-axis parabolic mirror arranged outside the ring side, the side of the ring-shaped off-axis parabolic mirror facing the ring side has a reflecting surface; a ring-shaped window layer, the ring-shaped window layer is arranged in the ring groove, and the ring-shaped window layer and the inner wall of the ring groove form a ring-shaped greenhouse cavity; an optical fiber, a ring substrate and a ring-shaped sensitizing layer are arranged in the ring-shaped greenhouse cavity and arranged in sequence along the bottom surface of the ring groove pointing to the ring window layer, the optical fiber is coiled along the circumference of the ring substrate, and is located on the surface of the ring substrate facing the bottom surface of the ring groove. The present invention is at least conducive to improving the absorption efficiency of the optical fiber to the pump light.

The present invention belongs to the technical field of inkjet printing, and specifically discloses a method for preparing a stable fluorescent PeQD ink suitable for EHD inkjet printing, comprising the following steps: (1) preparing a Cs precursor, (2) preparing PeQD, and (3) preparing PeQD ink. The PeQD ink prepared by the present invention can eliminate the coffee ring effect in inkjet printing, make the thickness of the pixel points of the color conversion layer more uniform, thereby achieving a uniform light emission effect; it can realize three-dimensional printing, and control the pixel point thickness by controlling the voltage application time without changing the pixel point size of the color conversion layer, which can not only make the pixel point light emission more uniform, but also significantly reduce blue light leakage and improve light conversion efficiency.

The present invention discloses a photoinitiator and a preparation method and application thereof. The composition of the photoinitiator of the present invention includes nano ZnO particles and unsaturated monomers attached to the surface of the nano ZnO particles, and the unsaturated monomers are at least one of methyl methacrylate, styrene, 1,6-hexanediol diacrylate, and tripropylene glycol diacrylate. The preparation method of the photoinitiator of the present invention comprises the following steps: dispersing a soluble zinc salt, a caustic alkali and an unsaturated monomer in ethanol, and then performing a solvent thermal reaction to obtain the photoinitiator. The photoinitiator of the present invention has the advantages of excellent dispersion stability, high light conversion efficiency, safety and non-toxicity, and its preparation process is simple, and is suitable for large-scale industrial application.

The invention belongs to the technical field of solar cells, and relates to a preparation method, a product and application of a strong-polarity tin oxide nano material. A Meerwein reagent is used for carrying out ligand modification on an organic amine and organic acid modified SnO2 nano material to obtain a nano material modified by one or more ligands of tetrafluoroborate BF4 <->, Me3O <-> and Et3O <->, so that the nano material can be dispersed in a strong-polarity organic solvent and then is spin-coated or blade-coated on an ITO / FTO (indium tin oxide / fluorine-doped tin oxide) substrate or a perovskite layer; the obtained tin oxide film has relatively good conductivity and leveling property, excellent film-forming property and relatively good spreadability; meanwhile, the tin oxide organic strong-polarity dispersion liquid has long-term stability in the aspect of storage stability; and the material has excellent light conversion efficiency in the aspect of device performance.

The present invention provides a plant lighting device and method based on intelligent switching, comprising a light irradiation unit, a light adjustment unit and a light control unit, wherein the light adjustment unit can adjust the position, angle or light environment elements of the light irradiation unit based on the instructions of the light control unit, so that the light irradiation unit can emit artificial light of different angles, different positions and different light environment elements to irradiate plants to meet the light signals required in the light control development process of the plants, wherein the light environment elements include light radiation intensity, spectrum, light cycle and time / space distribution of light.

The utility model relates to a Raman fiber laser, and the Raman fiber laser comprises a pumping source which is configured to generate pumping light; the Raman seed light generation unit is configured to convert the pump light into wavelength-tunable Raman seed light; the Raman laser generation unit is configured to perform power amplification on a part of light in the Raman seed light and convert the other part of light in the Raman seed light into Raman laser by using the amplified Raman seed light, so that the wavelength tuning function and high light-to-light conversion efficiency of the Raman fiber laser can be realized; good application prospects are realized.

The present invention belongs to the technical field of photovoltaic modules, and specifically relates to an integrated thin-film photovoltaic battery group, a double-sided photovoltaic module and a preparation method. The battery group includes a substrate, a first electrode layer, a photovoltaic functional layer including a first charge transport layer and a second charge transport layer, and a second electrode layer. The first surface of the substrate has a series groove, and the series groove has a mask wall B with an angle of 45° to 90° with the substrate reference plane A. In the z direction of the substrate, the depth of the mask wall B is greater than the sum of the thickness of the first electrode layer and the photovoltaic functional layer not including the second charge transport layer and is less than the total thickness of the first electrode layer, the photovoltaic functional layer and the second electrode layer. The first electrode layer, the photovoltaic functional layer and the second electrode layer are sequentially prepared on the projection surface of the x-y plane of the first surface of the substrate, and each monomer thin-film photovoltaic cell is formed by means of the series groove. The first electrode layer of the monomer thin-film photovoltaic cell and the second electrode layer of the adjacent monomer thin-film photovoltaic cell are connected in series to form a battery group, which significantly improves the photoelectric conversion efficiency.

The invention discloses a cadmium coordination polymer for regulating and controlling a photostimulation response behavior through thermal phase change as well as a preparation method and application of the cadmium coordination polymer, and belongs to the technical field of photostimulation response materials. The cadmium coordination polymer belongs to a P21 / c space group of a monoclinic system, and is prepared by solvothermal reaction of ligands (E)-4-(4-(phenylethynyl) styryl) pyridine, cadmium sulfate and 2, 6-dichlorobenzoic acid in a mixed solvent composed of N, N-dimethylacetamide and water according to a volume ratio of 1: (6.5-7.0). The cadmium coordination polymer disclosed by the invention does not generate [2 + 2] cycloaddition reaction under the irradiation of 365nm ultraviolet light, generates obvious thermal phase change after being heated to 443K, can initiate the [2 + 2] cycloaddition reaction under the irradiation of 365nm ultraviolet light to generate photostimulation response behavior at the moment, and can be applied to the fields of optical brakes, soft robots, optical equipment and the like.

This invention relates to a fluorescence down-conversion-based ultraviolet-enhanced CMOS image sensor and its fabrication method, belonging to the field of ultraviolet photoelectric detection technology. The image sensor comprises a CMOS image sensor and a down-conversion nanomaterial layer. The down-conversion nanomaterial layer is a benzene thin film deposited on the image-sensitive surface of the CMOS image sensor; the benzene thin film of the fluorescence down-conversion material layer has a thickness of 290 nm. This invention utilizes a low-cost fluorescence down-conversion material to achieve ultraviolet-to-visible light conversion. The emitted visible light can be well matched with the spectral response peak of the CMOS image sensor, improving the CMOS image sensor's response capability in the ultraviolet band. The down-conversion material in this invention possesses high light conversion efficiency, excellent thermal and light stability, and excellent transmittance in the visible and infrared regions. The thin film prepared by thermal evaporation exhibits better uniformity.

The present invention provides a lightly doped substrate, a substrate with a selective emitter, a solar cell and a preparation method and application thereof. The lightly doped substrate comprises a P-type silicon wafer layer, an N-type silicon layer, a first phosphorus silicon glass layer, an oxide layer and a second phosphorus silicon glass layer which are connected in sequence. In the subsequent heavy doping process, the lightly doped substrate of the present invention can increase the doping uniformity of the doping source on the surface of the silicon wafer on the one hand, and can reduce the square resistance of the heavily doped area on the other hand, thereby reducing the silver silicon contact resistance. The preparation method of the lightly doped substrate is simple, easy to implement and suitable for large-scale industrial production and application. The heavily doped area in the substrate with a selective emitter prepared by the lightly doped substrate has a high phosphorus content, a low and uniform square resistance of the heavily doped area, and a high light conversion efficiency.

The invention relates to the technical field of laser measuring and illuminating devices, and discloses an MOPA pulse solid-state laser combining an LD end pump and a side pump, which comprises an oscillation stage and an amplification stage, the oscillation stage comprises an LD bar array I, the LD bar array I is provided with an Nd: YAG crystal rod in a coupling mode in the light path direction, the Nd: YAG crystal rod is provided with a polaroid in the light path direction, and the polaroid is sequentially provided with a lambda / 4 wave plate and an RTP electro-optic Q-switch in the light path direction; the lambda / 4 wave plate and the RTP electro-optic Q-switch which are sequentially arranged are used for converting the p-direction polarized light into s-direction polarized light and outputting the s-direction polarized light to the amplifier stage; the amplification stage comprises a lambda / 2 wave plate for receiving polarized light in the s direction output by the oscillation stage, the lambda / 2 wave plate is provided with an Nd: YAG lath crystal in the light path direction, and a second LD bar array serving as a laser pumping source is arranged above the Nd: YAG lath crystal in parallel; the laser pulse width meeting the guidance requirement is met, meanwhile, the light-to-light conversion efficiency is improved, the laser energy is increased, the beam divergence angle is small, the laser optical axis stability is effectively improved, and then the laser guidance precision is improved.

The present application provides a kind of benzotriazole derivatives and the resin composition containing the derivative.The benzotriazole derivative of the present application is 1H substitution type, compared with the traditional 2H substitution type benzotriazole derivative photoconversion material compound, the 1H substitution benzotriazole compound of the present application can significantly improve the light conversion efficiency of solar cell, especially the light conversion efficiency of solar cell with TOPCon photovoltaic module.

The application relates to the technical field of semiconductor lighting, in particular to a full-spectrum high-color-rendering LED lamp bead. The lamp bead comprises an LED support, a blue light excitation chip, a red light enhancement chip, a multi-component fluorescent material system, a silicone encapsulation lens and a heat management structure. The blue light excitation chip and the red light enhancement chip are die-bonded on the LED support and form electrical connections with the positive and negative electrode pads respectively; the multi-component fluorescent material system is formed on the chip surface by adopting a partition coating process; the heat management structure comprises a high-thermal-conductivity ceramic substrate and a silver-plated copper alloy support frame. The application realizes full-spectrum coverage through the blue light excitation chip combined with the multi-component fluorescent material system, and simultaneously configures the red light enhancement chip to supplement the red light band energy, adopts an optimized partition coating process and a multi-layer fluorescent structure design, effectively controls the proportion of blue light overflow, and improves the light conversion efficiency. The lamp bead can significantly improve the general color rendering index Ra and the special color rendering index R9, realizes low blue light hazard, high luminous efficiency and good thermal stability.

The invention relates to a method and a device for generating an integrated start key single soliton microcavity optical frequency comb based on a double-loop coupling system. Comprising a monolithic integrated III-V group pumping laser chip, a silicon-based CMOS process integrated double-coupling optical microcavity chip, a temperature control unit, a driving control unit, a light beam splitter, a detection unit, a photoelectric detector and a feedback control unit. According to the scheme, blue detuning of the single soliton microcavity optical frequency comb is realized through double-coupling microcavity tuning local dispersion. The invention provides a technical scheme of an integrated start key single soliton microcavity optical frequency comb. The problems of thermal instability, dependence on a high-quality factor micro-ring resonant cavity and relatively low output power of the single soliton micro-cavity optical frequency comb due to the fact that pump laser needs to be locked in micro-cavity red detuning when the single soliton micro-cavity optical frequency comb is generated in a single-cavity system are solved, and the system stability and reliability of the single soliton micro-cavity optical frequency comb are improved. According to the scheme, a feasible path is provided for engineering application of the microcavity optical frequency comb in the fields of communication, sensing and the like.

The invention discloses a display panel and a display device. The display panel comprises a driving substrate and a plurality of light-emitting units located on one side of the driving substrate. The light-emitting unit comprises a light-emitting element and a color conversion structure, and the color conversion structure is located on the side, away from the driving substrate, of the light-emitting element. The color conversion structure comprises a first surface, and the extending direction of the plane where the first surface is located is parallel to the extending direction of the plane where the driving substrate is located. Wherein the first surface of at least part of the color conversion structures comprises a plurality of microstructures, and the arrangement densities of the microstructures on at least two color conversion structures are different. Through the arrangement of the microstructure, the light conversion efficiency of the color conversion structure on the emergent light of the light-emitting element can be improved, so that the emergent light quantity of the light-emitting unit is increased, and the display brightness of the display panel is improved. By differentially designing the microstructure arrangement density of the color conversion structures in the different light-emitting units, the consistency of the brightness of the different light-emitting units can be improved, so that the display uniformity is improved.