29 results about "Coffee ring effect" patented technology

The invention discloses an efficient and uniform perovskite passivation layer processing method and a solar cell, in particular to a perovskite passivation layer processing method combining physical vapor deposition, solvent-assisted induction and an air knife drying technology, and the method combines the physical vapor deposition, the solvent-assisted induction and the air knife drying technology. The problems that in an existing perovskite passivation layer preparation method, control over the thickness of a passivation layer is not accurate, a passivation solvent possibly causes damage to a perovskite interface, and the passivation layer is not uniform due to the coffee ring effect in large-area preparation are solved.

The application provides a kind of hole transport layer, a kind of perovskite solar cell and preparation method, the hole transport layer is polytriarylamine film, the polytriarylamine film is dissolved in carbon tetrachloride and toluene asymmetric binary solvent system by polytriarylamine, is prepared by coating, thermal annealing;In the asymmetric binary solvent system, the volume ratio of carbon tetrachloride and toluene is 100:1 to 1:100.By using carbon tetrachloride and toluene asymmetric binary solvent system to prepare polytriarylamine hole transport layer, effectively inhibit coffee ring effect, improve film flatness and density, reduce interface defects, significantly improve the photoelectric conversion efficiency and long-term thermal and humid stability of perovskite solar cell and assembly.

The application relates to the technical field of electronic information materials, in particular to a high-stability coffee ring resistant nano-silver jet printing ink, a preparation method and application. According to weight percentage, the preparation raw material of the nano-silver jet printing ink comprises 20-30% of nano-silver particles and the balance of mixed solvents; the nano-silver particles are zero-dimensional spherical particles coated with a stabilizer; and the mixed solvents comprise a first solvent, a second solvent, a third solvent and a fourth solvent with different boiling points. The application is innovative, and the specific four-component solvent compound system, the step-by-step filtration process and the rapid infrared sintering process are synergistically combined, so that the coffee ring effect is fundamentally inhibited while the excellent printing stability is ensured, and the high-performance ink with high uniformity and high-precision conductive patterns is obtained.

The invention belongs to the technical field of nano material preparation and printing, and particularly relates to indium phosphide quantum dot ink as well as a preparation method and application thereof. According to the preparation method disclosed by the invention, the indium phosphide quantum dot core is firstly synthesized, and then the acrylic acid / polyacrylic acid / acrylate derivative ligand is used for carrying out surface treatment on the indium phosphide quantum dot, so that the surface passivation and stability improvement of the indium phosphide quantum dot and the optimization of the rheological property of the ink are synchronously realized, and the quantum efficiency is improved; the photoluminescence quantum yield is increased by 80% to 100% compared with that of similar InP / ZnSe quantum dots which are not treated by acrylic acid and the like. Indium phosphide / zinc selenide quantum dots treated by acrylic acid and the like are dispersed in an organic solvent to adjust the adaptive concentration to obtain the quantum dot ink, the ink does not need to be added with an additional rheology modifier or a film-forming polymer, the coffee ring effect can be effectively inhibited during drying, and preparation of high-resolution micro-patterns is achieved. The material can be directly used as a color conversion layer to be integrated with a blue micron light-emitting diode chip to form a display device.

The invention provides a nano metal conductive network / polymer substrate flexible transparent electrode based on coordination bonding and a preparation method thereof, and relates to the field of flexible electronic materials.The method comprises the steps that S1, the surface of a hydrophobic substrate is coated with metal nanowire dispersion liquid, and a micron-sized conductive network is formed through self-assembly by means of the coffee ring effect; s2, preparing a substrate solution for forming a coordination bonding effect with a metal material; and S3, embedding the micron-sized conductive network in the step S1 into the substrate solution prepared in the step S2, and drying and stripping to form the embedded electrode. The method is simple in process and suitable for large-area preparation, and the obtained electrode has the advantages of being high in visible light transmittance, low in sheet resistance, excellent in mechanical stability, rapid in thermal response and the like. The flexible transparent electrode can replace traditional FTO, ITO and other brittle conductive substrates, and has wide application prospects in the fields of flexible solar cells, light-emitting displays, wearable optoelectronic devices and the like.

The invention discloses a method for preparing a micro-nano quantum dot light-emitting diode based on an electrically programmable surface energy lamination. According to the method, photoetching and developing are avoided, residues are not introduced, erosion to an organic layer is avoided, and the process environment compatibility is good. The inside of the pixel is oleophylic, the outside of the pixel is oleophobic, then an alternating non-uniform electric field is applied to generate field induced dielectric enrichment (FiDEF), quantum dots at the boundary are enriched towards the inner side of the pixel to sharpen the boundary, the coffee ring effect is avoided, and dark current and optical crosstalk are remarkably reduced through cooperation of long-term lyophobic outside the pixel, edge densification and outer ring passivation.

The present application relates to a kind of coffee ring effect auxiliary graphene microdrop printing high-efficiency preparation terahertz micro-ring array method, first by ultrasonic dispersion process preparation stable dispersion and significant coffee ring effect graphene ink;Then using piezoelectric nozzle jet and deposit single graphene microdrop, by controlling substrate material and temperature parameter to enhance microdrop coffee ring effect, make solute gather in microdrop edge in large quantities, form high-resolution micro-ring structure unit;Repeat the above deposition process, print periodic graphene microdrop dot matrix, obtain micro-ring array after completely drying;Finally, graphene terahertz micro-ring array is prepared after heat treatment.Due to the smaller graphene sheet size can accelerate edge solute pinning, and promote solute to be tightly packed in microdrop edge, therefore, the ultrasonic process parameter combination in step 1 and its small sheet size graphene ink produced, can enhance microdrop coffee ring effect, be conducive to the formation of graphene micro-ring of the present application.

The invention discloses a wearable SERS (Surface Enhanced Raman Scattering) sensor with an asymmetric Janus structure as well as a preparation method and application of the wearable SERS sensor. According to the sensor, an asymmetric double-layer structure is constructed through ultraviolet polymerization and a spin-coating technology, an adhesion layer (AA / HACC hydrogel) has humidity responsiveness and high adhesion, and a detection layer (CCNF / Au NCs) inhibits a coffee ring effect and ensures uniform distribution of nanoparticles. The detection limit of the hydrogel is as low as 0.027 [mu] M (L-phenylalanine), the RSD is less than or equal to 7.63%, the cell survival rate is greater than 95%, and these results jointly prove the excellent performance of the hydrogel in the aspects of sensitivity and stability. In addition, due to the characteristic of rapid preparation through photopolymerization, large-scale production can be realized. Therefore, the asymmetric Janus-SERS hydrogel sensor is suitable for early screening of glaucoma, dynamic monitoring of tear metabolites and personalized diagnosis and treatment of chronic diseases, has high sensitivity, biocompatibility and antibacterial performance, and has clinical transformation potential.

The application provides a method for determining the content of silicate in salt lake brine. + The method comprises the following steps: removing boric acid, boric acid salt and metal cations except Na from the salt lake brine to be measured by an adsorption resin and an imprinted hydrogel in sequence; obtaining a linear regression equation according to the mass concentration of silicate in a reference solution and the peak area of the Raman spectrum of the reference solution; and finally, scanning the coffee ring of the solution to be measured by using a Raman spectrometer, obtaining the peak area, and substituting the peak area into the linear regression equation to obtain the content of silicate in the salt lake brine to be measured. The boric acid, boric acid salt and metal cations in the salt lake brine to be measured are removed first, which can reduce the interference of salinity and other substances on the detection result, simplify the preparation process of the salinity matrix, reduce the amount of reagent used, fully combine the separation and enrichment characteristics of the coffee ring effect and the high-resolution detection of the Raman spectrum, and quickly and accurately determine the content range of silicate in the salt lake brine.

The invention relates to a preparation method of an interface modification layer based on a coffee ring effect, the interface modification layer based on the coffee ring effect prepared by the preparation method and a solid-state battery, and the preparation method comprises the following steps: spraying a metal salt precursor solution on the surface of a high-temperature solid-state electrolyte; a plurality of annular structures are formed on the surface of the solid electrolyte, and the interface modification layer is prepared. According to the preparation method provided by the invention, the coffee ring effect is utilized, the metal salt precursor solution is rapidly evaporated and decomposed on the surface of the solid electrolyte, and a plurality of ring structures are formed on the surface of the solid electrolyte to prepare the interface cross-linking layer, so that the interface contact between the solid electrolyte and the lithium metal negative electrode is remarkably improved; the interface impedance is obviously reduced; moreover, compared with the existing methods such as magnetron sputtering, thermal evaporation, chemical vapor deposition and construction of a composite negative electrode, the method has the advantages of simplicity in operation, low cost, no sacrifice of the specific capacity of the negative electrode and good cycle performance of the battery.

The application discloses a film layer printing method and device, electronic equipment and storage medium. The application can divide the to-be-printed unit in the substrate into multiple sub-regions, and control the printing nozzle of the printing device to print the material in the sub-region, so as to form a film layer. In the application, the to-be-printed unit in the substrate is divided into multiple sub-regions according to the size information of the to-be-printed unit, and then the printing nozzle is controlled to print the sub-region, so that the flowing time of the material in the to-be-printed unit is reduced, the distribution of the material in the to-be-printed unit is more uniform, the generation of the coffee ring effect is avoided, and the thickness of the film layer is effectively ensured to be more consistent. Therefore, the stability of the device can be improved.

The invention belongs to the field of particle suspension evaporation, and relates to a particle suspension evaporation method and system based on a vibration substrate. According to the method, particle suspension liquid drops are deposited on a vibration substrate, and the substrate is driven to generate periodic vibration with specific frequency and amplitude, so that the liquid drops enter a resonance state. Under the resonance condition, complex convection is formed in the liquid drops, single circulation driven by evaporation is broken, the trend that particles continuously migrate to the edge is remarkably weakened, and therefore the coffee ring effect is effectively restrained. Compared with the prior art, the method has the advantages that the structure is simple, the operation is convenient, uniform deposition of particles can be realized without adding a surfactant or special surface modification, and the method has good universality and wide application prospect, and is suitable for the fields of biological detection, ink-jet printing, functional coating, micro-nano device manufacturing and the like.

The invention discloses an SERS (Surface Enhanced Raman Scattering) detection method for constructing a hot-spot ordered multilayer nano array based on temperature-driven shrinkage liquid drops, which comprises the following steps of: changing the surface tension of a gas-liquid interface by utilizing temperature change to generate a thermal capillary effect or a Malangori effect, and regulating and controlling the dynamic shrinkage process of the nano sol liquid drops; the target molecules are actively transported into the uniformly distributed hot spot ordered multi-layer nano array structure, coffee rings caused by the reduction of the uniformity of the nano array are avoided, and then a target object signal is detected under a Raman spectrometer. Circulating convection is generated through the synergistic effect of the Malangori effect and the coffee ring effect, and the nano particles in the contracted liquid drops can circularly flow in the centers and the edges of the liquid drops. Therefore, an ordered multi-layer nano array with uniformly distributed hot spots can be constructed in a liquid drop shrinkage process, and meanwhile, high-sensitivity and high-stability detection of SERS of target molecules in the hot spots can be realized.

The invention provides a preparation method and application of a self-assembled silver nanowire array for read-only memory, belongs to the field of metal nano material preparation, and solves the problems that the arrangement and the structure of silver nanowires are difficult to accurately control by a traditional self-assembled silver nanowire deposition method, the overall performance of a device is influenced, and the device performance is influenced. The preparation method comprises the following steps: carrying out ultrasonic treatment on a prepared silver nanowire solution, sucking a proper amount of the solution by using a pipette, putting the solution into preparation equipment consisting of a substrate and a baffle plate to generate a multi-ring mode coffee ring effect, and carrying out ultrasonic treatment on the prepared silver nanowire solution; in addition, data storage is realized innovatively through welding among the silver nanowires, and the silver nanowires can be welded only by applying voltage, so that resistance is reduced, data storage is realized, special materials and structures are not needed, and due to the high resistance of the silver nanowire array, the data storage performance is greatly improved. And the power consumption required for writing and reading the data is low.

This invention discloses a multifunctional atomizing agent for ancient book restoration, its preparation method, and its application, belonging to the field of ancient book preservation technology. The atomizing agent is a mixed solution containing chitosan quaternary ammonium salt and zirconium carbonate. The method for treating ancient books using this atomizing agent is as follows: after cleaning the ancient books to remove impurities, they are placed in a sealed deacidification device. The mixed solution of chitosan quaternary ammonium salt and zirconium carbonate is atomized and then introduced to spray the pages of the ancient books. The books are then dried in a ventilated environment at ambient temperature to complete the treatment. The atomizing agent and treatment method of this invention have multifunctional effects on ancient books, including deacidification, strengthening, consolidation, antibacterial properties, and anti-aging. It avoids the uneven treatment caused by the coffee ring effect and phenomena such as yellowing and fading. Furthermore, it simplifies the ancient book restoration process, enabling one-step atomization, significantly shortening the processing flow, reducing processing operations, shortening the processing cycle, and significantly improving processing efficiency.

The present application relates to the technical field of coating, in particular to a method for inhibiting coffee ring effect. The present application is based on the synergistic effect of gravity affecting the distribution of solid particles in a liquid containing particles, solvent surface tension and evaporation rate to inhibit coffee ring effect. The present application adopts a specific drying method of inverting the wet coating layer downward. Under the influence of gravity, the liquid droplets form an inverted cone, and the solid particles are affected by gravity and concentrated at the bottom of the cone. The solid particles flowing to the edge flow downward after reaching the edge, and the cycle continues, so that the solid particles gradually dry and fix to the substrate surface. By controlling the volume fraction of volatile organic solvent in the solvent and the drying temperature, the control of the solvent surface tension and the evaporation rate is realized, and the coffee ring effect is effectively inhibited, and a uniform coating is obtained. The method provided by the present application is simple and effective, and is suitable for different substrate surfaces, solvents and solid particles, and has wide application range and wide application scenarios.

The utility model provides a display panel and a display device. The display panel comprises a substrate, a first light-emitting unit, a second light-emitting unit and a third light-emitting unit, the first light-emitting unit, the second light-emitting unit and the third light-emitting unit are arranged on the substrate, the light-emitting wavelength of the first light-emitting unit is larger than that of the second light-emitting unit, and the light-emitting wavelength of the second light-emitting unit is larger than that of the third light-emitting unit. Each light-emitting unit comprises an anode, a functional part and a light-emitting part; by reducing the ink printing amount of the light-emitting part in the second light-emitting unit, the average thickness of the light-emitting part in the second light-emitting unit is larger than 65 nm and smaller than 80 nm, the coffee-ring effect of the second light-emitting unit is relieved, the flatness of the surface of the side, away from the substrate, of the light-emitting part is improved, the uniformity of a film layer is improved, and the light-emitting efficiency is improved. And the performance and the service life of the display device are improved.

The invention discloses a perovskite precursor solution for preparing a flexible photovoltaic module and application thereof, and belongs to the technical field of solar cells. The technical problems to be solved are that a perovskite precursor prepared from a perovskite precursor solution cannot be arranged in order, so that a grain boundary has defects, and a prepared perovskite film cannot be industrially produced in air and is poor in stability. The key point of the technical scheme is that a perovskite precursor solution prepared by adopting a specific solvent combination and proportion and a perovskite material is moderate in volatilization rate, uniform film formation is facilitated, and the coffee ring effect or pinhole defect caused by rapid drying is avoided. The controllable crystallization rate provides enough time to enable the perovskite precursor to be arranged in order, and the grain boundary defect is reduced, so that the performance of the subsequently prepared flexible photovoltaic module is improved.

The invention discloses a Raman spectrum myocardial infarction screening method, a Raman spectrum myocardial infarction screening system, Raman spectrum myocardial infarction screening equipment and a medium, and belongs to the field of biomedical spectrum detection. The method comprises the following steps: collecting a trace peripheral whole blood sample, mixing with an SERS (Surface Enhanced Raman Scattering) reagent, dispensing, depositing and drying, and preparing a to-be-detected sample by utilizing a coffee ring effect; collecting the Raman spectrum to obtain original data; self-adaptive dual-channel interference elimination processing is carried out on original data to obtain a pure biomarker spectrum, and the processing fuses physical correction based on a standard spectrum library and data driving correction based on an adversarial auto-encoder; microcosmic, mesoscopic and macroscopic biomarker features are extracted from the pure spectrum and aggregated to generate a multi-dimensional feature vector; and finally, inputting the feature vector into a lightweight deep learning model to obtain a risk probability and finish grading evaluation. According to the method, rapid and high-precision myocardial infarction screening of trace whole blood without centrifugation is realized, and the accuracy and practicability of instant detection are remarkably improved.

The invention belongs to the technical field of SERS (Surface Enhanced Raman Scattering) and food safety detection, and particularly relates to application of an Ag-GO-PAM (Polyacrylamide) flexible SERS substrate to rapid detection of pesticide residues on the surface of pericarp. According to the method, the flexible SERS substrate is used for wiping the surface of the bent peel and then is taken down, and Raman spectrum detection of the pesticide thiram is carried out. The substrate is used for detecting thiram, and has the advantages that by adding GO, PAM hydrogel can form a pore structure which is uniform in pore size and adapts to pesticide molecule adsorption and mass transfer, meanwhile, the coffee ring effect caused by excessive aggregation or uneven dispersion of silver nanoparticles is inhibited, the silver nanoparticles are promoted to form a uniform SERS hot spot area, and the detection sensitivity is improved. And collaborative optimization of SERS detection sensitivity and stability is realized. An oxygen-containing functional group on the surface of the GO and the thiram bimolecule form specific interaction, so that a Raman signal of the thiram bimolecule can be remarkably amplified; the substrate is easy and convenient to prepare, complex pretreatment is not needed, and a reliable technology is provided for efficient detection of pesticide residues.

The application discloses a nano-label-free nucleic acid detection test strip based on a DNA sponge capture probe. The application uses a three-dimensional biomimetic DNA sponge as a test strip detection line capture interface, and utilizes the porous biomimetic structure to realize the synergistic enhancement effect of anti-coffee ring effect, resident reaction solution, prolonged action time of recognition molecules and capture probes, and multi-valent load to improve the capture efficiency. A lossless chain displacement isothermal amplification is matched, and rich guanine amplification products are continuously generated on the premise of not consuming templates. The products and chlorinated hematin or N-methyl mesoporphyrin IX self-assemble to form a deoxyribozyme complex, and double-mode visual detection is completed through substrate catalytic colorimetric or ultraviolet excitation fluorescence. The application does not use nanoparticles labels in the whole process, is simple and convenient to operate, low in cost, green and environment-friendly, and is suitable for instant detection of various nucleic acid targets, and provides a universal high-performance interface and signal output scheme for paper-based biosensing.

The invention relates to the technical field of optical sensing imaging, in particular to a wavelength modulation SPR (Surface Plasmon Resonance) imaging sensing system and method, and the system comprises an image collection unit which comprises an incident light path assembly, a sensing assembly and a reflected light path assembly; the temperature control unit comprises a heating element positioned on one side, deviating from the coupling prism, of the sensing chip; and the data processing unit is used for fitting the sensing surface image acquired by the surface array detector and outputting the refractive index of the liquid to be detected. By adopting the low-cost monochromatic LED array, the system cost is greatly reduced, the stability is improved, and high-precision measurement in a wide dynamic range is realized through a self-adaptive spectrum fitting algorithm of the data processing unit; the temperature control unit is used for accurately controlling the temperature field of the liquid drops and manipulating the internal flowing mode of the liquid drops, so that directional enrichment of target molecules in a preset area is realized, substrate modification or exogenous additives are not needed, and the problem of probe saturation of the traditional coffee ring effect is effectively solved.

The invention discloses a cucurbit [8] uril-based perovskite thin film and a preparation method thereof, and relates to the technical field of perovskite thin film preparation. The preparation method of the cucurbit [8] uril-based perovskite thin film comprises the following steps: S1, mixing a cucurbit [8] uril solution with a perovskite precursor to prepare ink; s2, carrying out ink-jet printing on the ink to prepare a cucurbit [8] uril-perovskite thin film; and S3, annealing the cucurbit [8] uril-perovskite thin film, and completing thin film crystallization to obtain the cucurbit [8] uril-based perovskite thin film. According to the cucurbit [8] uril-based perovskite thin film and the preparation method thereof provided by the invention, the cucurbit [8] uril is applied to ink-jet printing to prepare the perovskite thin film, so that the coffee ring effect and satellite drop problems in the droplet deposition process can be effectively relieved; the problems that an existing cucurbituril molecule is obvious in coffee ring effect, uneven in film layer and poor in film forming stability in ink-jet printing are solved.

The invention relates to the technical field of coatings, in particular to a method for inhibiting a coffee ring effect. The coffee ring effect is inhibited based on the synergistic effect of gravity on distribution of solid particles in liquid containing particles, solvent surface tension and evaporation speed. The specific drying mode that the wet coating faces downwards in an inverted mode is adopted, under the influence of gravity, liquid drops can form an inverted cone, solid particles can be concentrated downwards to the bottom of the cone under the influence of gravity, the solid particles flowing towards the edge flow downwards after reaching the edge, and the solid particles flow circularly, so that the drying effect is improved. The solid particles are gradually dried and fixed to the surface of the base body; by controlling the volume fraction and the drying temperature of the volatile organic solvent in the solvent, the surface tension and the evaporation speed of the solvent are controlled, so that the coffee ring effect is effectively inhibited, and a uniform coating is obtained. The method provided by the invention is simple and effective, is suitable for different matrix surfaces, solvents and solid particles, and is wide in application range and wide in application scene.

The application provides a SEM sample preparation method for micro-nano sample morphology characterization. In the SEM sample preparation method, at least one of acetone, ethanol and methanol is used as a solvent, the solvent is a low-tension, low-boiling-point, high-vapor-pressure and low-viscosity liquid, the included angle between the conductive substrate and the horizontal plane is 15-45 degrees, the specific solvent such as acetone, ethanol and methanol is used to achieve the effect of rapid evaporation, and the dispersed liquid is added to the surface of the conductive substrate which is placed at an angle of 15-45 degrees, so that the micro-nano sample can be uniformly distributed on the conductive substrate, the coffee ring effect is avoided, and the uniformity and integrity of the surface structure of the micro-nano sample are ensured. This method reduces the aggregation of micro-nano sample particles, improves the surface quality of the micro-nano sample, is suitable for high-resolution morphology observation, and can present clearer and finer micro-nano structures in SEM and AFM characterization, thereby helping to accurately analyze the structural characteristics of the micro-nano sample.

The invention provides quantum dot ink for ink-jet printing capable of reducing a coffee ring effect and a preparation method of the quantum dot ink. The ink is prepared from porous graphite, CsPbBr3, normal hexane and dimethylformamide, the mass ratio of the porous graphite to the CsPbBr3 to the normal hexane to the dimethylformamide is 1: 4: 1: 1 to 1: 8: 1: 1; the D95 particle size of the porous graphite is 300-500 nm, the pore diameter is 10-20 nm, and the specific surface area is 100-300 m < 2 > / g. The ink is low in viscosity and smooth in ink-jet printing; during high-temperature annealing, the volatilization speed of the solvent is moderate, the porous graphite can be oxidized and removed in the annealing process, and the luminous intensity of the obtained luminous layer is not affected.

The invention belongs to the technical field of organic thin film transistors, and relates to an organic thin film transistor and a preparation method and application thereof, and the preparation method at least comprises the steps of solution temperature pre-adjustment, solution heat preservation transfer, solution heat preservation spin coating and annealing treatment which are carried out in sequence. Wherein the fluctuation range of the solution temperature is less than or equal to 1 DEG C in the solution heat-preservation transfer process; in the solution heat preservation spin-coating process, the difference value between the solution temperature and the spin-coating substrate temperature is smaller than or equal to 10 DEG C. The organic thin film transistor is prepared through the continuous thermal process, the uniformity of the thin film is remarkably improved, the coffee ring effect is eliminated, the molecular arrangement state is optimized, solvent residues and bubble defects are avoided, the processing reliability and repeatability of the organic thin film transistor are finally improved, and large-scale application and popularization are facilitated.

Embodiments of the present application provide a display panel and a manufacturing method thereof. The display panel comprises: a substrate; a thin film transistor layer arranged on one side of the substrate; a pixel definition layer arranged on a side of the thin film transistor layer away from the substrate; the pixel definition layer comprises a plurality of pixel openings; a plurality of light emitting units are arranged in the pixel openings one by one, and the light emitting unit comprises, in sequence from the substrate, an anode, a first film layer, a light emitting layer and a cathode; the first film layer comprises a nanowire structure; the nanowire structure is formed by using the micro-phase separation of rigid-rigid block polymers and the self-assembly characteristics of rigid-flexible block polymers, so that the surface roughness of the droplets of the design organic solution in the pixel opening is increased, the coffee ring effect is reduced, the film thickness uniformity of the light emitting layer is improved, the carrier injection performance of the display panel is improved, and the performance of the display panel is improved.

The invention provides ink-jet printing ink, a perovskite thin film, a preparation method of the perovskite thin film and a solar cell. The ink-jet printing ink comprises a solvent, a functional additive and a perovskite solute, the solvent comprises dimethyl sulfoxide, a first solvent and a second solvent; the first solvent comprises an ester solvent and / or a furan solvent; the second solvent comprises an alcohol solvent. By adopting the mixed solvent, the phenomenon that the nozzle is blocked due to rapid volatilization of the DMF solvent can be reduced, and the Margari flow is increased due to the addition of the high-boiling-point solvent, so that the coffee ring effect is inhibited, and the uniformity of the film is finally improved.