139 results about "Formamidinium" patented technology

The invention discloses a perovskite precursor solution additive, a perovskite light absorption layer and a preparation method of the perovskite light absorption layer. The preparation method of the perovskite solar cell comprises the following steps: adding a mixed solution of deionized water containing hydrochloric acid or organic amine hydrochloride and DMF (Dimethyl Formamide) into a perovskite solution to form a perovskite precursor solution, further obtaining a perovskite light absorption layer through a film preparation process, and assembling the solar cell. The crystallization process of the thin film is adjusted through chloride ions, hydroxyl and amino in the aqueous solution of hydrochloric acid or organic amine hydrochloride, decomposition of formamidine iodide is inhibited, growth of crystal grains is promoted, the quality of the thin film is improved, pinhole and grain boundary defects are reduced, and therefore the device performance of a perovskite photovoltaic cell prepared in air is enhanced.

The invention discloses a functional formamidine salt treated perovskite solar cell and a preparation method thereof. The solar cell comprises a transparent conductive substrate, an electron transport layer, a perovskite active layer, a perovskite modification layer, a hole transport layer and a metal counter electrode which are sequentially arranged from bottom to top, the perovskite light absorption layer is made of lead iodide formamidine perovskite; and the perovskite modification layer is a low-dimensional passivation layer which grows in a vertical orientation manner and is obtained by carrying out in-situ reaction on functional organic formamidine salt and the three-dimensional perovskite light absorption layer. According to the method, the surface defects of the three-dimensional perovskite thin film are effectively passivated, so that non-radiative recombination is effectively inhibited, and the charge transfer capability is improved; meanwhile, the interface energy level matching degree is optimized, and hole extraction is promoted. The preparation method provided by the invention is simple and easy to realize, has high repeatability, and effectively improves the photoelectric conversion efficiency and stability of the perovskite solar cell.

The present disclosure relates to a perovskite system comprising a perovskite film including perovskites having a three-dimensional heterostructure of formula ABX3 characterized by a tetragonal perovskite surface. A comprises at least one of methylammonium, formamidinium, cesium, or guanidinium. B is Pb or Sn. X comprises at least one of I, Br, or Cl. The perovskite system further comprises an interfacial capping layer including anilinium-based surface-capping ligands, the ligands being distributed at the tetragonal perovskite surface of the perovskite film and non-reactive with the perovskites, as determined by time-of-flight secondary ion mass spectrometry. Also described are methods of preparing the perovskite system, and solar cells or modules comprising the perovskite system.

The invention belongs to the technical field of photoelectric materials and devices, and particularly relates to a perovskite thin film and a preparation method and application thereof. A fluorine-containing phosphazene compound is used as a ligand and is mixed with a perovskite precursor solution composed of lead iodide, formamidine iodine and cesium iodide, spin coating is performed, the fluorine-containing phosphazene compound and part of formamidine cations form hydrogen bonds, part of formamidine cations are anchored at the bottom of a perovskite film, Cs-formamidine cations are uniformly distributed, and the perovskite film is prepared. Meanwhile, the fluorine-containing phosphazene compound and Pb < 2 + > form a coordinate bond, Pb < 2 + > defects are passivated, and the perovskite thin film is obtained through anti-solvent treatment and annealing treatment. The fluorine-containing phosphazene compound interacts with the components in the perovskite precursor solution, so that the nucleation rate of perovskite can be increased, the crystallization rate can be slowed down, the tensile stress can be eliminated, the perovskite does not enter crystal lattices, and the stability and crystallinity of the film are guaranteed. The perovskite thin film can be used for an inverted perovskite solar cell, and the performance and the stability of a device are improved.

The invention discloses a method for preparing a perovskite solar cell based on a fused salt doped Spiro-OMeTAD hole transport layer, and the method comprises the steps: dissolving lead iodide and formamidine iodide in a mixed solvent of N, N-dimethylformamide and dimethyl sulfoxide according to a molar ratio of (0.8-1.5): 1 to prepare an FAPbI3 perovskite precursor solution; the method comprises the following steps: mixing cyclohexylamine trifluoroacetic acid and 4-tert-butylpyridine according to a molar ratio of 1: (8-14), dissolving the mixture in a 70-110 mg / mL Spiro-OMeTAD chlorobenzene solution, adding an acetonitrile solution of LiTFSi, and stirring at normal temperature to obtain a hole transport material Spiro-OMeTAD solution; spin-coating the FTO substrate with an electron transport layer material, spin-coating the electron transport layer with the FAPbI3 perovskite precursor solution, and annealing to form a perovskite thin film; the method comprises the following steps: spin-coating an ammonium butyrate iodide solution on a perovskite thin film to obtain an interface modification layer, spin-coating a hole transport material Spiro-OMeTAD solution on the interface modification layer to obtain a cyclohexylamine trifluoroacetic acid doped Spiro-OMeTAD hole transport layer, and evaporating an interface modification layer and a metal electrode on the Spiro-OMeTAD hole transport layer.

The invention relates to the technical field of perovskite, and discloses a perovskite thin film, a preparation method thereof and a perovskite solar cell, the chemical formula of the perovskite thin film is ABX3, A is selected from at least two mixed cations of cesium, formamidine and methyl ammonium, B is lead, and X is mixed halogen of iodine and bromine; the thickness of the film is 300-600 nm, the grain size is 100-500 nm, the surface roughness Ra is smaller than or equal to 10 nm, guanidine thiocyanate is doped, the doping amount is 0.5-2.5% of the total mass of perovskite, and the molar ratio of iodine to bromine in mixed halogen changes in a gradient mode in the thickness direction of the film. By adopting the design of mixed cations and gradient halogen, the grain size of the prepared perovskite thin film is obviously increased, the surface roughness is obviously reduced, and the PL fluorescence lifetime is greatly prolonged, so that the service life of a carrier is obviously prolonged, and the effects of increasing the grain size of the perovskite thin film, reducing surface defects and enhancing thermal stability are achieved.

The invention discloses a perovskite material, a solar cell, a preparation method, electric equipment and power generation equipment, the general formula of the perovskite material is M < x > FA < y > A < 1-x-y > B < X > 3, and M comprises monovalent cations containing an N element; fA is a formamidine cation; a comprises at least one of inorganic or organic monovalent cations, B comprises at least one inorganic divalent cation, and X comprises at least one inorganic monovalent anion. According to the embodiment of the invention, the perovskite material containing formamidine cations is doped and improved through the monovalent cations containing the N element, and the stability of the corresponding perovskite solar cell is improved.

The invention discloses a lead acetate lead source-based pure-phase formamidine perovskite solar cell and a preparation method and application thereof. The lead acetate lead source-based pure-phase formamidine perovskite solar cell sequentially comprises a conductive substrate, an electron transport layer, a pure-phase alpha-FAPbI3 perovskite layer, a hole transport layer, a modification layer and an electrode layer from bottom to top, a solution containing FAI, PbI2 and PbAc2 is used for preparing a perovskite precursor, PbAc2 can form a weak Pb-I effect with free I <-> in the precursor solution, a recombinant Pb-I framework can be formed in situ in the crystallization process, rapid conversion from a delta phase to an alpha phase is promoted, high-quality oriented alpha-FAPbI3 perovskite crystals are formed, the phase stability is high, and the method is suitable for industrial production. And the photoelectric conversion efficiency of the perovskite cell prepared by using the material is high.

The invention provides a method for preparing formamidine hydriodate through a one-pot method, formamidine hydriodate and application of formamidine hydriodate, and particularly relates to the technical field of perovskite photovoltaic cell precursor material preparation. The method comprises the following steps: adding an iodine elementary substance and a solvent into a reaction container, dropwise adding a reducing agent to carry out a first reaction, adding formamidine acetate in batches to carry out a second reaction at 0-10 DEG C after the reaction is completed, and carrying out post-treatment purification after the reaction is completed to obtain the formamidine hydriodate. The method directly selects the iodine elementary substance as the raw material, so that the use cost of the raw material is effectively reduced; one-pot integrated reaction is adopted in the preparation process, intermediate separation is not needed, the opportunity that metal impurities are introduced due to multiple transfer and purification operations in a traditional method is reduced, and the content of the metal impurities in the product can be reduced; distillation and other steps with high energy consumption and long time consumption are omitted, so that the reaction period is shortened, and the energy consumption is reduced.

The invention discloses a pure blue light perovskite thin film material with a stable spectrum, and a preparation method and application of the pure blue light perovskite thin film material with the stable spectrum. The spectrum-stable pure blue light perovskite thin film material is prepared from the following raw materials: cesium halide, lead halide, an organic ligand, formamidine hydrobromide, lithium halide and 2-phenylmalonamide. According to the invention, 2-phenylmalonamide is introduced into the mixed halogen perovskite precursor as a functional additive, so that the pure blue light perovskite light-emitting diode with stable spectrum is realized.

Disclosed in the present application are a perovskite material, a solar cell, a preparation method therefor, an electrical device and power generation equipment. The general formula of the perovskite material is MxFAyA1-x-yBX3, M+ being a N-containing monovalent cation, FA+ being formamidinium, A being at least one of inorganic or organic monovalent cations, B being at least one inorganic divalent cation, and X being at least one monovalent anion. The embodiment of the present application dopes a formamidinium-containing perovskite material with a N-containing monovalent cation so as to improve same, thus improving the stability of corresponding perovskite solar cells.

The present invention discloses a perovskite active layer doped with a carbazole-based small molecule, and its preparation method and application. The preparation method includes: dissolving formamidinium iodide, cesium iodide, lead iodide, and methylammonium iodide in an organic solvent to obtain a cesium-formamidinium-methylammonium lead iodide alloy perovskite precursor solution of the ABX3 configuration; doping a carbazole-based small molecule dopant into the perovskite precursor solution; and preparing a carbazole-based small molecule-doped perovskite active layer by any one of spin coating, blade coating, or spray coating. By introducing the carbazole-based small molecule, the present invention effectively adjusts the energy level of the perovskite, improves the crystallinity of the perovskite thin film, and prepares a p-i-n type perovskite solar cell without a hole transport layer. The photoelectric conversion efficiency of the battery device prepared by this method exceeds 26.6%, and it exhibits excellent long-term operation stability.

The invention relates to the field of perovskite solar cells, and discloses a preparation method of an efficient and stable perovskite solar cell based on one-dimensional fluorine-containing formamidine single crystal modification, and the method comprises the steps: selecting transparent conductive glass as a substrate; a [2-(3, 6-dimethoxy-9H-carbazole-9-yl) ethyl] phosphonic acid solution is taken to be subjected to spin coating on the surface of the substrate, and a hole transport layer is obtained; spin-coating a perovskite precursor solution containing one-dimensional fluorine-containing formamidine perovskite single crystals on the hole transport layer to obtain a perovskite thin film; dropwise adding an electron transport layer precursor solution on the surface of the perovskite thin film for spin coating to obtain an electron transport layer; and preparing a metal electrode. According to the invention, the one-dimensional fluoroformamidine-containing perovskite single crystal and the three-dimensional perovskite double-anchoring lattice matching are utilized, the quality and the photoelectric property of the solar cell film are synergistically optimized, the efficiency of the perovskite solar cell device is 25.54%, and the unpackaged device still keeps 90.13% of the initial efficiency after 1000 hours under the environmental condition, so that the stability is excellent.

The application discloses a perovskite material, a perovskite thin film, an optoelectronic device and a preparation method thereof, and the chemical general formula of the perovskite material is A'(A x B 1‑x )Pb n X 3n+1 , wherein A' is at least one of a diamino organic molecule, A is methylamine CH3NH3 + , formamidine CH(NH2)2 + , B is Rb + , X is a halogen ion, x is less than 1, and n is a positive integer. The perovskite material is formed by doping Rb + and a long-chain diamino organic molecule to form an organic-inorganic doped perovskite material, and can be applied to the preparation of a perovskite light-emitting layer in an optoelectronic device such as a light-emitting diode. Based on the introduction of Rb + and the diamino organic molecule in the perovskite material, the working life and stability under a current working state can be effectively prolonged.

The invention belongs to the field of photovoltaic materials, and provides a flexible perovskite photovoltaic material and a preparation method thereof. The flexible film comprises a flexible substrate layer which is composed of polyethylene glycol terephthalate, and the surface of the flexible substrate layer is modified with nanoscale silicon dioxide particles; the chemical formula of the perovskite active layer is ABX3, A is mixed positive ions of formamidine ions and cesium ions, B is lead ions, and X is mixed halogen of iodide ions and bromide ions; a flexible packaging layer, wherein the flexible packaging layer is formed by compounding polydimethylsiloxane and graphene; according to the invention, by adopting the collaborative design of the flexible substrate (polyethylene glycol terephthalate) with the surface modified by nano silicon dioxide particles and the polydimethylsiloxane and graphene composite packaging layer, the photovoltaic material can bear more than 1000 times of 180-degree bending circulation, and the efficiency attenuation is less than 5%; the perovskite material is obviously superior to a traditional rigid perovskite material (fracture failure can be achieved after 100 times of bending).

The invention belongs to the field of Velciguat synthesis, and particularly relates to a preparation method of Velciguat and an intermediate product thereof. The preparation method of the Velciguat comprises the following steps: (1) reacting aminomalononitrile with methyl chloroformate to generate an intermediate product I; (2) carrying out ring closing on the intermediate product I and formamidine under an alkaline condition to obtain an intermediate product II; (3) carrying out bromination reaction on the intermediate product II and N-bromosuccinimide to obtain an intermediate product III; (4) reacting the intermediate product III with bis (pinacolato) diboron under the action of a catalyst to obtain an intermediate product IV; and (5) carrying out a reaction on the intermediate product IV and 5-fluoro-1-(2-fluorobenzyl)-3-iodo-1H-pyrazolo [3, 4-b] pyridine to prepare the viriciguat. The method is simple to operate, low in cost and safe in production. The invention also provides the intermediate product obtained by the preparation method.

The application discloses a preparation method of a wide-bandgap perovskite photoactive layer, and comprises the following steps: S1, lead iodide powder, cesium iodide powder and ytterbium bromide powder are proportioned according to a proportioning molar ratio, and an inorganic target material is prepared by using a hot-press sintering process; S2, formamidinium hydriodide powder and methylammonium bromide powder are proportioned according to a proportioning molar ratio, and an organic target material is prepared by using a normal-temperature preparation process; S3, a pretreated substrate is placed on a magnetron sputtering sample table, the target materials prepared in steps S1 and S2 are respectively installed on corresponding radio frequency sputtering targets, and the background of a magnetron sputtering system is vacuumized; S4, high-purity argon gas is used as a sputtering gas, and a wide-bandgap perovskite thin film is prepared by using a magnetron co-sputtering method; the sputtering power of the inorganic target material prepared in step S1 is controlled, the sputtering power of the organic target material prepared in step S2 is controlled, and the thickness of the thin film is controlled, so that the high-quality thin film is prepared by using the differential target material preparation process.

The invention discloses a wide-band-gap perovskite solar cell and a full-perovskite laminated solar cell. Methyl ammonium bromide and guanidine bromide are jointly doped into the perovskite precursor solution to partially replace formamidine iodide, and a multi-element A-site alloy structure is introduced into the perovskite solar cell, so that defects in a perovskite layer are reduced, the service life of a carrier is prolonged, surface non-radiation is inhibited, the voltage loss of a device is reduced, and the performance of the device is improved. Therefore, the performance of the perovskite solar cell is obviously improved.

This invention relates to a novel and improved method for preparing substituted N-(2-chloroethyl)-N'-hydroxy-3-phenoxypyridazine-3-formamidinium, which can be converted into substituted 3-(3-phenoxypyridazine-4-yl)-5,6-dihydro-4H-1,2,4-oxadiazine. Specifically, this invention relates to the preparation of 3-(3-chloro-2-fluoro-phenoxy)-N-[1-(chloromethyl)-2-(2-chloro-4-methyl-phenyl)ethyl]-N'-hydroxy-6-methylpyridazine-4-formamidinium, which can be converted into 3-[3-(3-chloro-2-fluorophenoxy)-6-methylpyridazine-4-yl]-5-(2-chloro-4-methylbenzyl)-5,6-dihydro-4H-1,2,4-oxadiazine; More specifically, it involves 3-(3-chloro-2-fluoro-phenoxy)-N-[1-(chloromethyl)-2-(2-chloro-4-methyl-phenyl)ethyl]-N'-hydroxy-6-methyl-pyridazin-4-formamidinium, which can be converted into (5S)-3-[3-(3-chloro-2-fluorophenoxy)-6-methylpyridazin-4-yl]-5-(2-chloro-4-methylbenzyl)-5,6-dihydro-4H-1,2,4-oxadiazine.

This invention belongs to the technical field of solar cells and discloses a three-dimensional two-dimensional core-shell self-encapsulated inverted perovskite solar cell and its preparation method. The method involves preparing an inverted planar heterojunction perovskite solar cell using NiO nanocrystals with a particle size of 3-5 nm and SnO2 nanorods with a particle size of 2-4 nm and an aspect ratio of 3-5, respectively, forming a hole transport layer (15-25 nm) and an electron transport layer (15-30 nm). A pyridylamine derivative hydrohalate is attached as a ligand to the surface of the NiO nanocrystals and SnO2 nanorods and added to the PbI2 layer. During the two-step preparation of the three-dimensional perovskite light-absorbing layer (500-800 nm) of formamidine triiodide(II)ate (FAPbI3), two-dimensional perovskites are simultaneously generated at the FAPbI3 / hole transport layer interface, the FAPbI3 / electron transport layer interface, and the grain boundaries within the FAPbI3 layer, thus forming a three-dimensional two-dimensional core-shell self-encapsulated perovskite light-absorbing layer. Finally, an aluminum-doped zinc oxide (AZO) top electrode was sputtered onto the electron transport layer to obtain a three-dimensional two-dimensional core-shell self-encapsulated inverted perovskite solar cell.

The invention provides a flexible perovskite solar cell with excellent bending performance and a preparation method thereof. 3-methacryloyloxypropyltrimethoxysilane (KH570), formamidine iodide, methylamine bromide, methyl ammonium chloride, spiroOMeTAD, a lithium salt acetonitrile solution and tBP chlorobenzene (CB) are used as raw materials, a perovskite thin film is prepared through a two-step spin-coating deposition method, and a silver electrode is prepared through a thermal evaporation method. The bending resistance of the prepared flexible perovskite solar cell (f-PSCs) is remarkably improved, the performance retention rate is improved from 53% to 90% after 3000 times of bending cycles, and the average photoelectric conversion efficiency of the cell is improved from 18.72% to 21.42%. According to the invention, a new way is opened up for improving the photovoltaic performance and bending resistance of f-PSCs by using the silane oxide coupling agent, and an important technical reference is provided for realizing industrialization of flexible perovskite solar cells.

This invention discloses a low-dimensional layered wide-bandgap perovskite material, a wide-bandgap perovskite solar cell, and a method for preparing the same. The chemical formula of the low-dimensional layered wide-bandgap perovskite material is A2B. n‑ 1Pb n X 3n+1 Where A is at least one of 4-fluoro-phenylethylammonium ion, phenylethylammonium ion, butammonium ion, and octylammonium ion; B is at least one of methylamine ion, formamidinium ion, and cesium ion; X is at least one halide ion; and n is greater than 1 and less than 10. The low-dimensional layered wide-bandgap perovskite material provided by this invention exhibits excellent environmental stability, with a bandgap reaching 1.70 eV. The open-circuit voltage of perovskite solar cells based on this low-dimensional layered wide-bandgap perovskite material can reach 1.27 V at 0.1 cm⁻¹. 2 It achieves a photoelectric conversion efficiency of 20.18% within the effective area and exhibits good stability.

The invention belongs to the technical field of material growth and quantum optics, and discloses a method for growing formamidine lead iodide perovskite with a multi-quantum well fluorescence oscillation peak, and the method comprises the following steps: placing formamidine iodide in an evaporation area of a tube furnace, and placing a lead iodide nanosheet substrate in a deposition area adjacent to the evaporation area; introducing inert gas into the tubular furnace cavity and maintaining a negative pressure environment; and controlling the temperature and sintering time of the evaporation area and the deposition area in stages to realize directional transmission and controllable film formation of the gaseous precursor, and cooling to obtain the formamidine lead iodide perovskite with the multi-quantum well fluorescence oscillation peak. Based on tubular furnace equipment, by controlling the placement positions of drugs and samples and the sintering temperature and time of a tubular furnace, the growth conditions of perovskite can be flexibly controlled, and the method has the characteristics of low cost, simplicity in operation and low-temperature controllability; the multi-quantum well fluorescence oscillation peak phenomenon of the prepared sample shows the huge potential of the ultrathin perovskite in the field of quantum optics.

This invention discloses a perovskite active layer passivating agent, a perovskite solar cell, and a preparation method thereof, relating to the field of perovskite solar cell technology. The invention uses a combination of formamidine thiocyanate (FASCN) and dodecyl ammonium bromide (DABr) as passivating agents. Through the "phase screening" effect of FA⁺ and the coordination regulation of SCN⁻, n=3 single-phase quasi-two-dimensional perovskite is selectively generated on the wide-bandgap perovskite surface, completely suppressing the n=2 phase and eliminating multiphase energy level disorder. Simultaneously, it achieves triple synergistic passivation: SCN⁻ coordinates and passivates lead defects, Br⁻ fills halogen vacancies, and FA⁺ occupies A-site vacancies, resulting in a 27% reduction in trap density and a 12-fold increase in carrier lifetime. The resulting perovskite solar cell exhibits a 6.8% increase in efficiency, significantly enhanced thermal stability, and a 4-fold increase in T80 lifetime. Furthermore, it is fully compatible with existing preparation processes and suitable for large-scale production.

This invention belongs to the field of polymer materials and relates to a method for preparing a multifunctional emulsion antioxidant and its application, specifically to an emulsion antioxidant that also absorbs ultraviolet light and its application. A multifunctional emulsion-type antioxidant comprises the following components: a phenolic primary antioxidant, wherein the phenolic primary antioxidant comprises a mixture of p-cresol and dicyclopentadiene copolymer (TH-CPL) and triethylene glycol bis[β-(3-tert-butyl-4-hydroxy-5-methylphenyl)propionate] (antioxidant 245); a thioester secondary antioxidant; a UV absorber; a light stabilizer; a nonionic surfactant; and deionized water; wherein the UV absorber is N-(ethoxycarbonylphenyl)-N'-methyl-N'-phenylformamidinium (UV-1), and the light stabilizer is a mixture of bis(1,2,2,6,6-pentamethyl-4-piperidine) sebacate and 1-methyl-8-(1,2,2,6,6-pentamethyl-4-piperidine) sebacate (292).

The invention relates to a synthesis method of a perovskite microcrystalline material, and belongs to the field of perovskite materials. The invention provides a synthesis method of a perovskite microcrystalline material, which comprises the following steps: mixing alkali metal iodide salt, lead acetate trihydrate and formamidine acetate, and reacting under preset conditions to obtain the formamidine lead iodide perovskite microcrystalline material. According to the method, an acid-free system is adopted for synthesizing the formamidine lead iodide perovskite microcrystal material for the first time, hydroiodic acid which is indispensable and extremely high in danger coefficient in a traditional aqueous phase method is completely abandoned, alkali metal iodide salt is creatively adopted as a green iodine source, high-quality formamidine lead iodide perovskite microcrystals are successfully synthesized, the material performance is guaranteed, and meanwhile the yield of the formamidine lead iodide perovskite microcrystals is increased. The safety of the synthesis process is greatly improved; in addition, the solid salt with stable properties is adopted, so that the sensitivity of the whole synthesis process to air and humidity is reduced, and better repeatability and stability are achieved.

The invention relates to a perovskite precursor solution, a perovskite thin film, a preparation method of the perovskite thin film and a photovoltaic module. The perovskite precursor solution comprises a perovskite precursor, an additive and a mixed solvent; the perovskite precursor is prepared from formamidine hydriodate and lead iodide; the additive comprises cesium iodide and methylamine hydrochloride; the mixed solvent is prepared from N, N-dimethyl formamide, N-methyl pyrrolidone and cyclohexyl pyrrolidone. The composition of the perovskite precursor solution is blended, the high-quality perovskite thin film with the micro-suede surface is spontaneously formed in the perovskite crystallization process, the micro-suede surface structure can increase the contact area between a perovskite layer and a subsequent functional layer, a tight mechanical interlocking effect is generated between the micro-suede surface structure and the interface of the functional layer, and the performance of the perovskite thin film is improved. Therefore, the interface adhesive force of the subsequent functional layer and the metal electrode is obviously improved, and the problem of performance degradation of the perovskite assembly caused by the packaging process is solved.

The invention provides a solar cell based on a Cu-doped lead-copper alloy perovskite light absorption layer and a preparation method of the solar cell, and the light absorption layer of the solar cell is a Cu-doped lead-copper alloy perovskite thin film Cs0. 05MA 0. 10FA 0. 85Pb1-xCuxI3, the preparation method of the lead-copper alloy perovskite thin film comprises the following steps: adding formamidine hydriodate, methylamine hydriodate, cesium iodide, lead iodide and cuprous iodide powder into a solvent, and uniformly stirring and mixing to prepare a perovskite precursor solution; the PbI2 powder and the CuI powder are uniformly mixed, the uniformly mixed precursor solution is spin-coated, annealing is carried out on a heating stage, the thin film is obtained, the ratio of the PbI2 powder to the CuI powder is 1-x: x, and x is equal to 0-10%. The copper-doped lead-copper alloy perovskite with the three-dimensional octahedral structure synthesized by the method has structural and thermodynamic stability and is high in fluorescence performance and light absorption performance, and the crystallization quality of a thin film is remarkably improved; when the perovskite thin film is used as a light absorption layer of the cell, a perovskite solar cell with high photoelectric conversion efficiency can be prepared, and the perovskite solar cell has excellent ultraviolet resistance and high temperature resistance stability.

The invention discloses a preparation method of a perovskite absorption layer and a solar cell. The preparation method of the perovskite absorption layer comprises the steps that under the mixed atmosphere of Ar and F2, an interface layer is deposited on a cell substrate through magnetron sputtering by means of a target material prepared through pre-sintering, and the target material comprises PbI2 and other metal halides in a set proportion; switching F2 into H2, and depositing a mesoporous layer on the cell substrate through magnetron sputtering by using a target material prepared by pre-sintering in a mixed atmosphere of Ar and H2; the mesoporous layer is coated with a solution containing AX, annealing treatment is carried out, the perovskite absorption layer is formed, A comprises formamidine and / or methylamine, and X comprises halogen. The proportion of each component of the perovskite absorption layer is effectively controlled, so that the carrier transmission capability and the carrier collection capability of the perovskite solar cell are improved, and the stability of the perovskite solar cell can be improved.

The invention relates to the technical field of solar cells, and discloses a perovskite layer and a preparation method thereof, a perovskite cell and a photovoltaic module, and the preparation method of the perovskite layer comprises the following steps: in an atmosphere containing oxygen, coating a lead halide skeleton layer with a cationic solution containing an additive, and carrying out annealing to obtain the perovskite layer; wherein groups in the cation solution comprise iodide ions and formamidine cations, the additive is RA, R is organic weak acid radical ions, and A is sodium ions and / or potassium ions. When the preparation method is used for preparing the perovskite layer, oxidation of iodide ions can be inhibited, and the crystallization quality of crystals of the perovskite layer is improved.