33 results about "Molecular stacking" patented technology

This invention discloses a method for preparing mesophase asphalt through quantum dot-targeted hydrogenation heterogeneous nucleation-guided microwave polycondensation, belonging to the fields of petroleum deep processing technology and carbonaceous mesophase materials. It aims to solve the technical bottlenecks of traditional processes, such as random nucleation, poor targeting of feedstock hydrogenation, low polycondensation efficiency, and insufficient product uniformity. This method uses heavy aromatic-rich oil as feedstock. First, a single-atom Fe quantum dot@MOF composite catalyst is prepared. The aromatic molecular structure of the feedstock is selectively optimized through quantum dot-targeted hydrogenation pretreatment, and functional elements are in-situ doped. Then, a "halo benzene core-PNIPAM shell-polylysine arm" intelligent responsive nucleating agent is prepared. Atomic-level dispersion is achieved using supercritical CO2, and the aromatic precursor molecular clusters undergo directional polycondensation in a phased array microwave reactor, inducing ordered molecular stacking. Finally, light components are removed and agglomerates are broken up after molecular distillation and ultrasonic depolymerization. This invention achieves controllable nucleation, efficient condensation, and stable product performance. The prepared mesophase pitch has an anisotropy content of >98%, a softening point of 260~290℃, an H / C atomic ratio of 0.4~0.6, a carbon residue of 82%~92%, and excellent spinnability, providing a new technical route for the large-scale preparation of high-performance mesophase pitch.

The invention relates to an asymmetric small organic molecule photovoltaic acceptor material based on an iodo-thiophene central core as well as a preparation method and application of the asymmetric small organic molecule photovoltaic acceptor material based on the iodo-thiophene central core, and creatively designs the asymmetric small organic molecule photovoltaic acceptor material based on the iodo-thiophene central core. On the basis of keeping the efficient photoelectric property, the asymmetric iodo-thiophene central core is introduced, so that the fine regulation and control on the molecular stacking behavior and the thin film morphology are realized. The asymmetric small organic molecule photovoltaic acceptor material has good solubility in various organic solvents, molecular accumulation can be finely regulated and controlled through asymmetric central core design, intermolecular pi-pi interaction and accumulation of end groups are enhanced, more orderly-arranged and optimized charge transfer channels are formed, and the asymmetric small organic molecule photovoltaic acceptor material has a good application prospect. Therefore, the crystallinity and morphology of the film are improved.

The present invention discloses a dibromo-1,3-bis(1-butylimidazole-3-yl)benzene ligand modified with an nitrogen heteroaromatic ring and a preparation method thereof, an iridium complex and an organic electroluminescent device. The dibromo-1,3-bis(1-butylimidazole-3-yl)benzene ligand modified with an nitrogen heteroaromatic ring has the following structure: wherein R is an nitrogen heteroaromatic ring group or a derivative thereof. The present invention introduces an nitrogen heteroaromatic ring group or a derivative thereof at position 5 of dibromo-1,3-bis(1-butylimidazole-3-yl)benzene to obtain a dibromo-1,3-bis(1-butylimidazole-3-yl)benzene ligand modified with an nitrogen heteroaromatic ring, which can be used as a tridentate ligand of an iridium complex, increases the rigidity of the ligand and the complex, regulates the luminescent color and efficiency of the complex, increases steric hindrance, reduces molecular stacking, thereby suppressing the non-radiative transition process of the molecule and improving the luminous efficiency of an organic electroluminescent device using an iridium complex.

The application belongs to the technical field of organic semiconductor materials, and particularly relates to an intrinsic low-melting-point polymer semiconductor material and a preparation method and application thereof. The polymer semiconductor material is a pyrrolopyrroloquinoline intrinsic low-melting-point polymer with a macrocyclic crown ether as a side chain. The application reduces the melting point of an existing organic polymer by introducing the macrocyclic crown ether into the side chain. The polymer provided by the application can be used to obtain a high-orientation semiconductor thin film through a melt friction transfer method, and the semiconductor thin film can be used as an organic semiconductor layer in an organic field effect transistor to obtain a new organic field effect transistor. The carrier mobility of the organic field effect transistor is improved by regulating a molecular packing mode. The application provides a feasible method for solvent-free processing of an organic field effect transistor device, which will help to solve the environmental pollution problem caused by traditional solution processing using a chlorinated solvent.

The application discloses a kind of based on benzo phenazine donor core asymmetric organic small molecule photovoltaic material and its preparation method and application.The asymmetric organic small molecule photovoltaic material has structure: wherein, D is donor unit, A is acceptor unit;The donor unit is selected from one of the structures shown in formula I: formula I;In formula I, R 12 Independent selection is one of hydrogen, halogen, trifluoromethyl, alkyl, X is selected from one of sulfur atom or selenium atom;The acceptor unit is selected from one of the structures shown in formula II: formula II;In formula II, R 13 It is selected from one of H, F or Cl;Indicate the connection position of acceptor unit or donor unit.The organic small molecule photovoltaic material designed and synthesized in the application has asymmetry, better molecular packing effect, strong crystallinity and solution processing, and can be used in organic solar cell, to improve its energy conversion efficiency.

The embodiment of the present application provides a kind of non-fused ring electron acceptor containing asymmetric side chain and its preparation method and application, wherein the non-fused ring electron acceptor containing asymmetric side chain has the structure as shown in the following: Wherein R1, R2 And R3 Include any one of branched alkyl, straight-chain or cyclic alkyl containing 1-20 carbon atoms, A is strong electron-withdrawing functional group.The non-fused ring electron acceptor containing asymmetric side chain and its preparation method and application provided by the embodiment of the present application, by introducing arylalkylamine asymmetric structure as side chain, it is conducive to keeping the molecular planarity of non-fused ring electron acceptor, easy to control molecular packing and solubility.Therefore, the non-fused ring electron acceptor has good solubility, strong crystallization, high mobility, good compatibility, easy to process into film;When the electron acceptor material is used to prepare organic solar cell, the device photoelectric conversion efficiency can reach 16%.

The invention relates to the technical field of organic electronic materials, and discloses a small molecule electron acceptor material with high fluorescence quantum yield and low energy loss, and a preparation method and application thereof. The small-molecule electron acceptor material is a compound GM4, the chemical structural general formula of the small-molecule electron acceptor material is as shown in a formula (1): # imgabs0 #, R1 and R2 are respectively and independently CnH2n + 1, and n is an integer between 1 and 100; x is selected from H, F, Cl, I, NO2 or CN. The micromolecular electron acceptor material GM4 has steric hindrance due to a benzodithiophene unit in the center, so that torsion is generated between the center unit and a molecular skeleton, the molecular planarity is damaged to a certain extent, and molecular accumulation is weakened. The weak molecule accumulation behavior improves the fluorescence emission and fluorescence quantum yield, and weakens the energy loss caused by non-radiative attenuation. An organic solar cell device prepared from the micromolecule electron acceptor material has high open-circuit voltage and excellent photoelectric conversion efficiency.

The invention provides a thiazine derivative self-assembled monomolecular layer hole transport material and a preparation method and application thereof, and belongs to the technical field of solar energy industry. The self-assembled monomolecular layer hole transport material is simple in structure, high in hole transport property, strong in interface passivation ability, high in thermal stability and suitable for large-scale application, thiazine with a rigid conjugate large plane serves as a parent nucleus, molecular accumulation can be improved, and the hole transport performance of the material can be improved; by taking a phosphate group as a tail end, single-molecule self-assembly can be realized, a perovskite interface can be passivated, the energy loss at the interface is reduced, and the battery performance is improved. When the synthesized material is used as a hole transport layer of an inverted perovskite solar cell, gt can be obtained without doping; and meanwhile, the service life of the perovskite solar cell is greatly prolonged, the stability of the perovskite solar cell is greatly improved, and industrialization of the perovskite solar cell is expected to be achieved.

The invention provides a phenylcarbazole derivative as well as a preparation method and application thereof. The phenylcarbazole derivative has a structure as shown in a formula I or a formula II. According to the invention, phenyl carbazole with a rigid conjugate large plane is used as a parent nucleus, so that ordered accumulation of molecules is optimized, and the hole mobility is remarkably improved; the phosphate group at the tail end is an anchoring group, can effectively passivate perovskite interface defects, reduce energy loss at the interface, realize monomolecular self-assembly and improve cell performance, and as a self-assembly monomolecular layer hole transport material, the perovskite solar cell has relatively high photoelectric conversion efficiency, and the photoelectric conversion efficiency of the perovskite solar cell is improved. And the service life and the stability are relatively long.

The application discloses a non-fullerene acceptor material based on a thiophene derivative pi bridge, a preparation method and application thereof. The non-fullerene acceptor material has a conjugated molecular knot with two or more than two pi-A-D-A type repeating units, and includes three types of molecular building blocks, namely, a thiophene derivative pi bridge, an aromatic ring core D with electron-donating properties, and a terminal unit A with electron-withdrawing properties. The application can flexibly construct an organic photovoltaic non-fullerene acceptor molecule by using the multi-selectivity and combination of the three types of molecular building blocks. The introduction of the thiophene derivative pi bridge is favorable for enhancing the D-A effect, improving the conjugation degree, and enhancing the intermolecular packing of the acceptor and improving the charge mobility. The non-fullerene acceptor material can be prepared by using a relatively common tin reaction and a Stille coupling reaction, has stronger electron-donating and electron-withdrawing effects, suitable molecular packing, and higher photovoltaic performance.

The invention belongs to the technical field of organic electroluminescent materials, and particularly relates to a compound with a nine-ring side chain and an organic electroluminescent device.The series of compounds contain a large conjugate fragment and a benzo five-membered heterocyclic ring or five-membered heterocyclic ring structure, sulfur and other heavy atoms contained in the large conjugate fragment can improve the spin-orbit coupling capacity, and therefore the stability of the compound is improved. According to the invention, charge transfer in molecules is enhanced, so that a higher anti-intersystem crossing coefficient is achieved, efficient conversion of triplet excitons can be realized, and loss of the excitons is reduced; meanwhile, the compound structure has an extremely remarkable intramolecular distortion structure, molecular stacking is effectively reduced, annihilation of carriers and excitons is inhibited, triplet-state excitons can be converted more efficiently, combination of the excitons in a light-emitting layer is guaranteed through cooperation of the structures of all the parts, and the light-emitting efficiency is improved. Therefore, the comprehensive performance of the organic light-emitting device is improved.

This invention discloses an inverse perovskite solar cell and its fabrication method that utilizes a tetrathiofulvalene derivative to regulate the self-assembled monolayer (SAM) assembly structure. The invention uses bis(carbazolium phosphate) SAM-4PABCz as the hole-selective interface layer, employs an ethanol / NMP mixed solvent system, and introduces a tetrathiofulvalene (TTF) derivative as a dopant. By leveraging the steric hindrance effect and non-covalent intermolecular interactions of the TTF derivative, the out-of-plane π-π interactions between bis(carbazolium phosphate) molecules are weakened, inducing the molecules to shift from a high-tilt-angle "standing" stacking of SAM molecules to a low-tilt-angle near-flat arrangement. This regulation strategy effectively suppresses island-like aggregation of SAMs, reduces the interface defect state density, promotes uniform and ordered molecular stacking, and forms a uniform and dense hole-selective contact interface.

The invention discloses synthesis and application of a derivative containing a dibenzothiophene unit. At present, a compound containing dibenzothiophene and biphenyl vinyl is single, three isomers obtained by changing connection sites of the dibenzothiophene and the biphenyl vinyl are not reported, and research on molecular structures and photoelectric properties of the isomers is not reported. According to the invention, a series of dibenzothiophene compounds are synthesized from a dibenzothiophene aldehyde raw material, and three molecules show different photophysical and photochemical properties. Meanwhile, dibenzothiophene groups at different positions are accessed, the compound can realize regulation and control of molecular stacking structures and intermolecular interaction, and meanwhile, the compound has the property of laser gain, and a novel material is provided for the fields of optical communication, optical sensing, optical display and the like. A herringbone stacking structure is considered to be an ideal structure for simultaneously realizing high migration rate and strong emission in an organic semiconductor, the luminescent characteristic and multiple modification sites of dibenzothiophene are utilized, and S-H bonds between sulfur atoms and hydrogen atoms of adjacent molecules are utilized, so that the mobility of the organic semiconductor is improved. The twisting angle and intermolecular interaction of molecules are ingeniously regulated and controlled, and the design strategy provides a new thought for realizing organic semiconductors with high mobility and strong luminescence.

This invention relates to a hydrogen-bonded organic framework material with thermal exciton properties, its preparation method, and its applications. The material utilizes organic ligands with aggregation-induced emission properties, forming a three-dimensional periodic network through intermolecular hydrogen bond self-assembly. The ordered molecular stacking within the framework effectively activates and enhances the intrinsic luminescence performance of the ligands. Furthermore, by introducing halogen atoms for structural modulation, the excited-state energy levels can be finely tuned, thereby inducing thermal exciton properties and significantly improving the utilization efficiency of triplet excitons. This material possesses rapid luminescence kinetics and holds promise as a high-performance scintillator. Its high triplet state utilization efficiency significantly enhances its light yield, reaching 14474 MeV. ‑1 Furthermore, this material can be incorporated into a polymer matrix to form flexible thin films, exhibiting excellent X-ray imaging capabilities.

The organic photoelectric detector comprises a conductive substrate, an electron transport layer, an active layer, a hole transport layer and a metal electrode from top to bottom, an active layer film is prepared by using the anti-solvent method, and an anti-solvent is n-hexane. The conductive substrate is ITO conductive glass, FTO conductive glass, AZO conductive glass or TCO conductive glass. According to the organic photoelectric detector for regulating and controlling molecule accumulation based on the anti-solvent method and the preparation method of the organic photoelectric detector, the film forming dynamics of the bulk heterojunction active layer is influenced, donor and acceptor molecules are induced to be tightly and orderly accumulated, the dark current density is reduced, the external quantum efficiency and the specific detection rate are improved, and the specific detection rate of the device is larger than 1 * 10 < 14 > jones between 335 nm and 655 nm.

The application provides an oligomeric acceptor containing a bithiazole spacer and a preparation method and application thereof. The oligomeric acceptor is a small molecular acceptor with a bithiazole as a bridging spacer and outwardly connected to a benzothiadiazole (BTP) unit or a quinoxaline (Qx) unit or a phenazine (Pz) unit as a central core. The oligomeric acceptor containing the bithiazole spacer has good light capturing capacity, suitable electronic energy levels and strong molecular packing; as an electron acceptor material applied to an organic solar cell, the oligomeric acceptor has high photoelectric conversion efficiency.

The present application relates to the technical field of organic electroluminescence devices, in particular to an electron transport material, a preparation method thereof and an organic electroluminescence device. The electron transport material is selected from a compound shown in the following formula 1: the electron transport material takes 9-phenyl-9-dibenzofuranyl fluorene ring as a mother nucleus, the fluorene ring is bonded to a cyanophenyl-substituted triazine group through a chemical bond or an arylene or heteroarylene, wherein the 9-phenyl-9-dibenzofuranyl fluorene ring ensures the spatial torsion of the molecule, avoids the poor film-forming property of the device caused by the molecular stacking; the triazine group and the cyan group have strong electron-withdrawing property, are conducive to electron transport, enhance the recombination of electrons and holes in the light-emitting layer, and thus improve the light-emitting efficiency of the device; the cyan group is bonded to the triazine group through the biphenyl group to increase the conjugation, which is more conducive to adjusting the energy level, reducing the injection barrier, reducing the driving voltage, and at the same time is also conducive to the balanced distribution of the intramolecular electrons, and further improves the light-emitting efficiency of the device.

The invention relates to the technical field of organic semiconductor materials, in particular to a naphthalimide cathode interface material and a preparation method and application thereof. The naphthalimide cathode interface material provided by the invention is a bilateral NDI derivative formed by introducing substituent groups at two ends of an NDI skeleton, and the substituent groups are amine compounds. By limiting the type of introduced substituent groups, the molecular accumulation mode, the film morphology and the crystallization behavior are effectively regulated and controlled, the lowest unoccupied molecular orbital energy level position is accurately adjusted, and better energy level matching with a mainstream non-fullerene receptor and a cathode electrode is realized. The naphthalimide cathode interface material provided by the invention is an organic photovoltaic material with excellent performance, and the efficiency of an organic solar cell device assembled by adopting the naphthalimide cathode interface material can reach 19.39%.

The invention belongs to the technical field of solar cells, and discloses an oligomeric condensed ring electron acceptor material and a preparation method and application thereof. According to the oligomeric condensed ring electron acceptor material disclosed by the invention, a pseudo para-aromatic ring is taken as a core of a link unit, different aromatic derivatives are selected as peripheral groups of the link unit, and the pseudo para-type oligomeric condensed ring electron acceptor material beneficial to promoting a'end group-end group 'accumulation mode is constructed. The material has high glass transition temperature, improved molecular spatial configuration and optimized molecular stacking, when the material is applied to an organic solar cell, the intermolecular stacking of an active layer can be more accurately regulated and controlled, the thin film morphology can be optimized, and the charge transfer efficiency, the photoelectric conversion efficiency and the stability of a device can be improved.

The invention discloses a non-fullerene acceptor material based on a two-dimensional conjugated core with an imidazole five-membered ring as well as a preparation method and application of the non-fullerene acceptor material, and belongs to the technical field of photovoltaic materials. The preparation method comprises the steps of amine reduction, Schiff base reaction, Knoevenagel condensation reaction and the like which are carried out under anhydrous and anaerobic conditions, the whole synthesis route is simple and convenient, the cost is low, and large-scale preparation can be realized. Based on good advantages of an imidazole five-membered ring structure and a two-dimensional conjugate plane of a molecular main body framework in molecular design, the acceptor material has good molecular accumulation, exciton dissociation, charge mobility and charge recombination are further controlled, and PCE of a device is improved. When the actually prepared BTQT-4F is used as an acceptor material to be applied to binary and ternary organic solar cells, the efficiencies respectively reach 18.22% and 19.40%, which shows that the BTQT-4F has huge actual development value.

The application belongs to the technical field of organic synthesis, and discloses a non-fused ring thiophene polynuclear hole transport material and a preparation method and application thereof. The hole transport material takes a non-fused ring thiophene polynucleus as a central core and methoxytriphenylamine as a peripheral end group. The S and O atoms of the non-fused ring thiophene polynucleus are conducive to forming a non-covalent conformational lock, so as to make the material have excellent solubility and film-forming property, and effectively enhance molecular accumulation and improve hole transport performance. In addition, the central core polynuclear sulfur atom characteristics promote the interface action of the hole transport layer and the perovskite layer, are conducive to passivating the interface defects of the perovskite layer, and further improve the transport and separation efficiency of carriers. The non-fused ring thiophene polynuclear hole transport material is applied to a perovskite solar cell, the device open-circuit voltage is 1.130 V, the short-circuit photocurrent density is 24.07 mA cm ‑2 , the fill factor is 0.7860, and finally a high photoelectric conversion efficiency of 21.38% is obtained, which shows great commercial application value.

The invention belongs to the technical field of organic electroluminescent materials, and particularly relates to a boron-nitrogen compound and an organic electroluminescent device of the boron-nitrogen compound. Through conjugate extension and heteroatom doping, a multi-plane distributed three-dimensional space structure which is connected by aryl or heteroaryl and has resonance cores on two sides is constructed, the energy level and the molecular accumulation behavior can be synchronously regulated and controlled, and intramolecular charge transfer (ICT) and resonance effect in an excited state are maintained while concentration quenching is inhibited. The compound has good film-forming property and excellent luminous efficiency.

The invention relates to the technical field of polypeptide compounds, in particular to a novel reduced glutathione crystal form and a preparation method thereof. In an X-ray diffraction pattern of the novel reduced glutathione crystal form, characteristic peaks exist at the positions where 2 theta is equal to 4.9 degrees, 14.7 degrees, 24.6 degrees, 29.6 degrees and 34.7 degrees. The invention aims to provide a novel crystal form of glutathione, and by regulating and controlling a molecular accumulation mode and a hydrogen bond network, the synergistic improvement of solubility and stability is realized, and the hygroscopicity is reduced. The crystal form not only can expand the application potential of glutathione in efficient preparations, but also provides a technical basis for large-scale production through a simplified preparation process. Experimental results show that the novel reduced glutathione crystal form provided by the invention is relatively low in moisture absorption rate, relatively excellent in solubility and relatively excellent in stability under damp and hot conditions.

The application discloses Y-type bio-based glycolipid and a preparation method and application thereof, and the preparation method is as follows: taking strophanthin and beta-D-glucose pentaacetate as raw materials, under the action of a catalyst and molecular sieves in an organic solvent, a preliminary product is obtained through reaction, and then after washing, drying and removal of the organic solvent in vacuum, purification is carried out to obtain the Y-type bio-based glycolipid. The application first takes strophanthin and beta-D-glucose pentaacetate as raw materials, and through etherification reaction, a pure bio-based amphiphilic hydrophilic head group glycolipid with Y-type structure is prepared, the compactness of molecular stacking is effectively improved, the nano aggregate obtained through self-assembly has excellent thermal stability and solvent stability, the problem that a self-assembly drug carrier is applied to a biomolecular engineering field and has poor stability can be solved, and the practical application of the self-assembly material can be promoted.

The invention discloses a chemical preparation method of a benzothiazole-thiophene conjugated organic photovoltaic intermediate, and belongs to the technical field of organic semiconductor materials. The intermediate adopts an asymmetric bifunctional design, thiophene at one end of the intermediate contains halogen (X) as a polymerization site, and thiophene at the other end of the intermediate contains an alkyl chain (R) so as to adjust solubility and molecular accumulation. The preparation method comprises the following steps: cyclizing 2, 5-dihalogenated benzoyl chloride serving as an initial raw material to prepare an intermediate A; carrying out selective Suzuki coupling reaction on the intermediates B and A with controlled molar equivalents to realize monosubstitution; and carrying out secondary Suzuki coupling reaction to obtain a target intermediate. The method is simple in route, high in yield and controllable in structure. The conjugated polymer obtained by polymerizing the intermediate can obtain higher photoelectric conversion efficiency when being used for an organic solar cell device. The problems that an existing fused ring benzothiazole material is complex in synthesis and poor in structural modification flexibility are solved, and a key intermediate is provided for development of a high-performance and low-cost organic photovoltaic material.

The invention discloses a chiral self-assembly material based on a tetraphenyl ethylene-carbazole material and a self-assembly method of the chiral self-assembly material. A carbazole unit is used as an electron donor (D) to construct a D-A type conjugated skeleton with a carborane electron acceptor (A), and a tetraphenyl ethylene unit with propeller-shaped dynamic conformation is introduced; the rigid plane structure of carbazole endows the molecule with a significant pi-pi stacking tendency, and the flexible conformation of tetraphenyl ethylene provides dynamic adjustability for the system; through co-assembly with chiral limonene, the successful coupling between the chiral limonene and molecules increases the orderliness of molecular stacking from the macroscopic level, greatly improves the circular polarization value, provides a powerful structural model and theoretical basis for constructing the structure-function relationship between the structure of the organic supramolecular self-assembly body and circular polarization fluorescence, and has broad application prospects. And a novel strategy is provided for designing a novel organic circularly polarized photoelectric material.

The invention relates to the technical field of organic photoelectric materials, and provides a boron-containing organic electroluminescent material and a preparation method and application thereof. The organic electroluminescent material provided by the invention is a novel boron-containing compound, and the structure of the organic electroluminescent material is as shown in the general formula 1: because the structure of the boron-containing organic electroluminescent material contains a double-silicon structure, the intermolecular space is enlarged, electron transmission is facilitated, and molecular structure accumulation is avoided; a device prepared from the material has the characteristics of low voltage, long service life and good luminous efficiency.

The invention provides an arylamine organic compound, a mixture, an organic electronic device and a display panel, and the structural formula of the arylamine organic compound is as follows: # imgabs0. The arylamine organic compound provided by the invention can effectively influence molecular accumulation and regulate the triplet state energy level and charge transfer capability of a material; when the compound is used as a light-emitting auxiliary material to be applied to organic electronic devices, efficient light-emitting efficiency, longer service life and lower driving voltage can be realized.

The application provides a kind of thiazine derivative self-assembly monolayer hole transport material and its preparation method and application, and belongs to the technical field of solar energy industry, the hole transport material has the structure shown in formula I, the self-assembly monolayer hole transport material of the application has simple structure, high hole transport property, strong interface passivation ability, high thermal stability, is suitable for large-scale application, it can improve molecular packing and improve the hole transport performance of material with rigid conjugated large plane thiazine as mother nucleus;With phosphoric acid group as the end, single molecule self-assembly and passivation perovskite interface can be realized, energy loss at the interface is reduced, and the battery performance is improved. When the synthesized material is used as the hole transport layer of the inverted perovskite solar cell, the photoelectric conversion efficiency of more than 24% can be obtained without doping, and the life and stability of the perovskite solar cell are greatly improved, which is expected to help the perovskite solar cell to realize industrialization.

The present application relates to compound crystal form, specifically to a pyrazoxyfen polymorph and a preparation method and application thereof. The pyrazoxyfen polymorphs are all white powders, and microscopically, they have different molecular packing modes, can be classified into various crystal forms, and the X-ray powder diffraction patterns of the crystal forms are described in the specification. The present application discloses that each crystal form of pyrazoxyfen has excellent biological activity and solubility.