CN110106633B - Inorganic perovskite/polymer composite nanofiber membrane and preparation method and application thereof - Google Patents

Inorganic perovskite/polymer composite nanofiber membrane and preparation method and application thereof Download PDF

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CN110106633B
CN110106633B CN201910400715.9A CN201910400715A CN110106633B CN 110106633 B CN110106633 B CN 110106633B CN 201910400715 A CN201910400715 A CN 201910400715A CN 110106633 B CN110106633 B CN 110106633B
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perovskite
nanofiber membrane
polymer
inorganic perovskite
composite nanofiber
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CN110106633A (en
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宋立新
王天伟
熊杰
杜平凡
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Zhejiang University of Technology ZJUT
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    • B82—NANOTECHNOLOGY
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    • B82Y40/00—Manufacture or treatment of nanostructures
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    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
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    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
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Abstract

The invention belongs to the technical field of perovskite composite materials, and particularly relates to an inorganic perovskite/polymer composite nanofiber membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: preparing a polymer solution in an organic solvent, wherein the polymer comprises at least one of polyvinylpyrrolidone, polyacrylonitrile and polyurethane; adding lead halide and cesium halide into a polymer solution to obtain a spinning solution; and (3) carrying out electrostatic spinning on the spinning solution to prepare the inorganic perovskite/polymer composite nanofiber membrane. The invention adopts simple electrostatic spinning technology to prepare the inorganic perovskite/polymer composite nanofiber membrane, realizes the combination of the inorganic perovskite and the polymer, enables the perovskite material to be embedded on the surface of the nanofiber, and is beneficial to the light absorption, charge transfer and photoelectron transmission of the perovskite material; and the preparation process is simple, is not limited by a substrate, and can be prepared in a large area, so that the preparation method has great application potential in the fields of perovskite solar cells, light-emitting diodes and the like.

Description

Inorganic perovskite/polymer composite nanofiber membrane and preparation method and application thereof
Technical Field
The invention belongs to the technical field of perovskite composite materials, and particularly relates to an inorganic perovskite/polymer composite nanofiber membrane as well as a preparation method and application thereof.
Background
The lead-halogen-based perovskite material has excellent semiconductor characteristics, excellent light absorption performance, good light emitting performance and low cost, and is widely applied to photovoltaic devices, light emitting diodes, photoelectric detection and the like, so that the material is attracted attention. The lead-halogen-based perovskite material mainly comprises an organic-inorganic hybrid lead-halogen-based perovskite and an all-inorganic lead-halogen-based perovskite material, and relates to three forms of a thin film, a single crystal and powder. The lead-halogen-based perovskite thin film has wide application prospect in the fields of solar cells, light-emitting diodes and the like.
At present, lead-halogen-based perovskite thin films are mainly prepared by a solution spin coating method and a double-source co-evaporation method. The solution spin-coating method comprises three steps of material preparation, high-speed rotation and film volatilization, and the thickness of the formed film is controlled by controlling the glue homogenizing time, the rotating speed acceleration, the dropping amount, the concentration of the used solution and the viscosity. The spin coating method is a coating process in which coating liquid drops falling on a workpiece are entirely distributed on the surface of the workpiece by the centrifugal force and the gravity generated when the workpiece rotates. However, the spin coating method is only suitable for preparing a single-sided coating on a flat simple workpiece, and the area of a spin-coating substrate is not too large, and the coating waste is large. Compared with a solution spin-coating method, the thickness of the perovskite film prepared by double-source co-evaporation is uniform, but the preparation process of the double-source co-evaporation is complex and the energy consumption is high.
The electrostatic spinning is a simple, convenient and feasible method for continuously preparing the nano fiber and the nano fiber membrane, and the prepared nano fiber has the advantages of large surface area, controllable fiber diameter, simple electrostatic spinning device, low cost, controllable process and the like. The electrostatic spinning nanofiber membrane has wide application in the fields of energy, catalysis, environment, biology and the like. The perovskite nanofiber membrane is prepared by electrostatic spinning, so that the thickness of the modularized perovskite nanofiber membrane can be flexibly regulated and controlled, and the modularized perovskite nanofiber membrane can be easily operated, and therefore the perovskite nanofiber membrane is concerned. Separately reported electrostatic spinning perovskite nanofiber membranes, for example, the chinese patent with application number 2015102214194 discloses a perovskite nanofiber membrane solar cell and a preparation method thereof, wherein the preparation method comprises: the organic-inorganic hybrid perovskite composite nanofiber membrane is prepared by taking methyl ammonium iodide and lead chloride as precursors through electrostatic spinning and is used as a perovskite solar cell light absorption layer. Chen et al prepared a polymer-coated perovskite nanofiber membrane using coaxial electrospinning.
Compared with organic-inorganic hybrid lead-halogen-based perovskite materials, the all-inorganic lead-halogen-based perovskite material has good stability. Therefore, the preparation of inorganic perovskite nanofiber membranes by electrostatic spinning is an important step in the preparation and application of perovskite materials, and becomes the core content of current research. For example, patent document No. 201810359252.1 discloses a method for preparing a composite fluorescent nanofiber membrane, which comprises: adding cesium chlorohalide into a lead halide solution, adding a polymer after the cesium chlorohalide is dissolved to obtain a spinning solution, and then carrying out electrostatic spinning to obtain an inorganic perovskite/polymer composite nanofiber membrane; in the composite nanofiber, the perovskite is easily positioned in the nanofiber, and the light capture efficiency of the perovskite is inhibited due to the shielding of the polymer, so that the generation efficiency of a photon-generated carrier is reduced; and the polymer completely blocks the perovskite from effectively contacting with the charge transport layer, inhibits the transfer of charges and limits the application of the polymer in the fields of solar cells and the like.
Disclosure of Invention
Based on the defects in the prior art, the invention provides an inorganic perovskite/polymer composite nanofiber membrane as well as a preparation method and application thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
the preparation method of the inorganic perovskite/polymer composite nanofiber membrane comprises the following steps:
s1, preparing a polymer solution in an organic solvent, wherein the polymer comprises at least one of polyvinylpyrrolidone, polyacrylonitrile and polyurethane;
s2, adding lead halide and cesium halide into the polymer solution to obtain spinning solution;
s3, carrying out electrostatic spinning on the spinning solution to obtain the inorganic perovskite/polymer composite nanofiber membrane.
Preferably, the mass ratio of the polymer to the organic solvent is 0.09-0.2: 1.
preferably, the mass ratio of the total mass of the lead halide and the cesium halide in the polymer solution to the organic solvent is 0.1-1: 1, the molar ratio of the lead halide to the cesium halide is 0.5-5: 1.
preferably, the electrostatic spinning process conditions include: the extrusion rate is 0.1-2 mL/h, the voltage is 10-40 kV, the ambient temperature is 0-50 ℃, and the humidity is below 50%.
Preferably, the organic solvent is dimethyl sulfoxide.
Preferably, the inorganic perovskite comprises CsPbX3X = Cl, Br or I.
The invention also provides an inorganic perovskite/polymer composite nanofiber membrane prepared by the preparation method of any one of the schemes.
Preferably, the inorganic perovskite is positioned on the surface of the polymer nanofiber.
The invention also provides an application of the inorganic perovskite/polymer composite nanofiber membrane, and the inorganic perovskite/polymer composite nanofiber membrane is applied to a perovskite solar cell or a light-emitting diode.
Preferably, the inorganic perovskite/polymer composite nanofiber membrane is used as a light absorption layer of a perovskite solar cell or a photoluminescent layer of a light emitting diode.
Compared with the prior art, the invention has the beneficial effects that:
the invention adopts simple electrostatic spinning technology to prepare the inorganic perovskite/polymer composite nanofiber membrane, realizes the combination of the inorganic perovskite and the polymer, enables the perovskite material to be embedded on the surface of the nanofiber, is beneficial to the light absorption of the perovskite material, improves the contact between the perovskite material and a charge transmission layer, and promotes the charge transfer and photoelectron transmission; meanwhile, the modularized perovskite composite nanofiber membrane is simple and convenient to operate when a perovskite device is assembled; the stable inorganic perovskite can improve the stability of the device; in addition, the electrostatic spinning inorganic perovskite nanofiber membrane is simple in preparation process, is not limited by a substrate, and can be prepared in a large area, so that the electrostatic spinning inorganic perovskite nanofiber membrane has great application potential in the fields of perovskite solar cells, light emitting diodes and the like.
Drawings
FIG. 1 is a digital photograph of an inorganic perovskite/polymer composite nanofiber membrane of example 1 of the present invention;
FIG. 2 is a SEM photograph of inorganic perovskite/polymer composite nanofibers according to examples 1, 2 and 3 of the present invention;
FIG. 3 is an X-ray diffraction XRD pattern of the inorganic perovskite/polymer composite nanofiber membrane of example 1 of the present invention;
FIG. 4 is a schematic structural diagram of a perovskite solar cell constructed using an inorganic perovskite/polymer composite nanofiber membrane according to example 1 of the present invention;
FIG. 5 is a photocurrent voltage curve of a perovskite solar cell constructed using inorganic perovskite/polymer composite nanofiber films according to examples and comparative examples of the present invention, wherein (a-d) are photocurrent voltage curves of cells of examples 1-4 in this order, and (e) is a photocurrent voltage curve of a cell of comparative example 1;
fig. 6 is a schematic structural view of a light emitting diode constructed using an inorganic perovskite/polymer composite nanofiber film according to example 1 of the present invention.
Detailed Description
The technical solution of the present invention is further described below by means of specific examples.
Example 1:
the specific preparation process of the inorganic perovskite/polymer composite nanofiber membrane of the embodiment is as follows:
adding 0.18 g of Polyacrylonitrile (PAN) into 2 g of dimethyl sulfoxide (DMSO), and magnetically stirring to obtain a polymer solution;
subsequently, 0.09 g of PbBr was simultaneously added to the polymer solution2And 0.11 g CsBr, and stirring for 6 h at the temperature of 80 ℃ by magnetic stirring to obtain CsPbBr3The precursor spinning solution of (1);
reacting CsPbBr3Putting the precursor spinning solution into an injector, applying 18 kV high voltage between a spinning nozzle and a receiving device, enabling the distance between the spinning nozzle and a receiving plate to be 10 cm, the extrusion rate to be 0.1 mL/h, the spinning environment temperature to be 2 ℃, the humidity to be 10%, and enabling the solution to be directly deposited on the receiving plate in a disordered state to form an inorganic perovskite/polymer nanofiber membrane, CsPbBr for short3A/PAN composite nanofiber membrane.
The inorganic perovskite/polymer nanofiber membrane of this example will be characterized in structure and performance as follows:
as shown in FIG. 1, is CsPbBr3Digital photograph of/PAN composite nanofiber membrane, nanofiber membrane can be bent into a circle, which indicates CsPbBr3the/PAN composite nanofiber membrane showed good flexibility. FIG. 2 (a) shows CsPbBr prepared in this example3SEM photograph of/PAN composite nanofiber membrane, the nano particles can be seen to be embedded on the surface of the nanofiber. FIG. 3 shows CsPbBr prepared in this example3X-ray diffraction spectrum of/PAN composite nanofiber membrane, which shows that the inorganic perovskite CsPbBr3Is performed.
CsPbBr of the present example3the/PVP composite nano fiber film is applied to a perovskite solar cell, and a device is assembled as shown in figure 4, and comprises a conductive substrate 1, a charge transmission layer 2 and CsPbBr which are sequentially laminated from bottom to top3a/PAN composite nanofiber membrane 3, a charge transport layer 4 and a top electrode 5; wherein the charge transport layer 2 and the charge transport layer 4 are respectively used as an electron transport layer or a hole transport layer, and the charge transport layer can be TiO2、ZnO、SnO2、Al2O3Or one or more fullerene derivatives, wherein the hole transport layer can be one or more of triphenylamine structure-containing small molecules, thiophene structure-containing small molecules, aniline structure-containing polymers, thiophene structure-containing polymers, nickel compounds, copper compounds and molybdenum compounds; the conductive substrate 1 can be a glass or polymer substrate on which a conductive material such as ITO, FTO, metal nanowires or conductive polymers is deposited; the top electrode 5, i.e. the back electrode, is made of a noble metal or a carbon material. First, a hole transport layer poly (3, 4-ethylenedioxythiophene) -polystyrenesulfonic acid (PEDOT: PSS) was coated on an ITO conductive substrate, and CsPbBr was added3the/PAN composite nanofiber membrane is placed between the hole transport layers, then the fullerene derivative PCBM electron transport layer is in spin coating, and finally the gold electrode is evaporated to form the perovskite solar cell.
The photoelectric conversion efficiency of the perovskite solar cell of the present example was 0.55%, as shown in fig. 5 (a). The perovskite is positioned on the surface of the nanofiber, so that the light capture efficiency and the charge transfer capacity can be improved, the contact between the perovskite and the charge transport layer can be improved, the charge transfer capacity can be improved, and the application of the perovskite in a solar cell can be promoted.
The embodiment adopts a simple electrostatic spinning technology to prepare the inorganic perovskite/polymer composite nanofiber membrane, realizes the combination of the inorganic perovskite and the polymer, enables the perovskite material to be embedded on the surface of the nanofiber, and is beneficial to the light absorption, charge transfer and photoelectron transmission of the perovskite material; meanwhile, the modularized perovskite composite nanofiber membrane is simple and convenient to operate when a perovskite device is assembled, and the stable inorganic perovskite can improve the stability of the device; in addition, the preparation process of the electrospun inorganic perovskite nanofiber membrane is simple, is not limited by a substrate, and can be prepared in a large area, so that the electrostatic inorganic perovskite nanofiber membrane has great application potential in the field of perovskite solar cells.
While CsPbBr of this example3the/PAN composite nanofiber membrane is applied to a light-emitting diode, and CsPbBr is added as shown in figure 63the/PAN composite nanofiber membrane 7 is directly deposited on the LED chip 6, CsPbBr3the/PAN composite nanofiber membrane is used as a photoluminescent layer of a light emitting diode.
Example 2:
the specific preparation process of the inorganic perovskite/polymer composite nanofiber membrane of the embodiment is as follows:
adding 0.08 g of Polyurethane (PU), 0.07 g of polyvinylpyrrolidone (PVP) and 0.1 g of Polyacrylonitrile (PAN) into 2 g of dimethyl sulfoxide (DMSO), and magnetically stirring at room temperature for 2 hours to obtain a clear solution;
then adding 0.21 g of PbCl2, 0.27 g of PbBr2 and 0.32 g of CsBr into the solution, and stirring for 6 hours at the temperature of 80 ℃ by magnetic stirring to obtain a precursor spinning solution of CsPbIBr 2;
loading the precursor spinning solution into an injector, adding 25 kV high voltage between a spinning nozzle and a receiving device, wherein the distance between the spinning nozzle and the receiving plate is 15 cm, the extrusion rate is 0.3 mL/h, the spinning environment temperature is 10 ℃, the humidity is 20%, and the solution is directly deposited on the receiving plate in a disordered state to form an inorganic perovskite/polymer nanofiber membraneI.e. CsPbIBr2A polymer composite nanofiber membrane.
The following will be made to CsPbIBr of the present embodiment2The structure and the performance of the polymer composite nanofiber membrane are characterized:
as shown in FIG. 2 (b), CsPbIBr prepared for the present example2SEM photograph of the polymer composite nanofiber membrane shows that the nanoparticles are embedded on the surface of the nanofibers; the digital photograph and XRD pattern are similar to those of example 1, which means that the appearance, flexibility and crystal structure of the composite nanofiber membrane of this example are similar to those of example 1.
CsPbIBr prepared in this example2The application of the/polymer composite nanofiber membrane in the perovskite solar cell, and the solar cell assembled with the structure shown in example 1 has a photoelectric conversion efficiency of 0.71%, as shown in fig. 5 (b).
CsPbIBr prepared in this example2The application of the/polymer composite nanofiber membrane in the perovskite solar cell, and the solar cell assembled with the structure shown in example 1 has a photoelectric conversion efficiency of 0.71%, as shown in fig. 5 (b).
Example 3:
the specific preparation process of the inorganic perovskite/polymer composite nanofiber membrane of the embodiment is as follows:
adding 0.1 g of PU, 0.1 g of PVP and 0.1 g of PAN into 2 g of DMSO, and magnetically stirring at room temperature for 2h to obtain a clear solution;
then 0.24 g of PbCl was added to the solution20.32 g of PbBr20.8 g of PbI2And 0.24 g CsI, and stirring for 6 hours at the temperature of 80 ℃ by magnetic stirring to obtain CsPbX3Precursor spinning solution, X = Cl, Br or I;
loading the precursor spinning solution into an injector, applying a high voltage of 30 kV between a spinning nozzle and a receiving device, enabling the distance between the spinning nozzle and the receiving plate to be 25 cm, the extrusion rate to be 1 mL/h, the spinning environment temperature to be 30 ℃ and the humidity to be 30%, and directly depositing the solution on the receiving plate in a disordered state, thereby forming CsPbX3(X = Cl, Br or I) inorganic perovskite/polymer composite nanofiber membrane.
CsPbX of the present embodiment will be described below3The inorganic perovskite/polymer composite nanofiber membrane is characterized in structure and performance:
as shown in FIG. 2 (c), CsPbX prepared for the present example3Scanning electron microscope photographs of the inorganic perovskite/polymer composite nanofiber membrane show that the nanofiber membrane is basically coated by the nanoparticles. CsPbX prepared in this example3The X-ray diffraction spectrum and digital photograph of the inorganic perovskite/polymer composite nanofiber membrane are similar to those of example 1.
CsPbX prepared in this example3The application of the inorganic perovskite/polymer composite nanofiber membrane in the perovskite solar cell is similar to that of example 1, and the photoelectric conversion efficiency of the assembled solar cell reaches 1.16%, as shown in fig. 5 (c).
In addition, CsPbX of the present embodiment3The inorganic perovskite/polymer composite nanofiber membrane can also be applied to a light emitting diode, as in example 1.
Example 4:
the specific preparation process of the inorganic perovskite/polymer composite nanofiber membrane of the embodiment is as follows:
adding 0.1 g of PU and 0.3 g of PVP into 2.0 g of DMSO, and magnetically stirring at room temperature for 2 hours to obtain a clear solution;
then 0.3 g of PbBr was added to the solution21.5 g of PbI20.1 g CsBr and 0.1 g CsI, and stirring the mixture for 6 hours at the temperature of 80 ℃ by magnetic stirring to obtain CsPbX3Precursor spinning solution, X = Cl, Br or I, the precursor spinning solution is filled into an injector, 40 kV high voltage is applied between a spinning nozzle and a receiving device, the distance between the spinning nozzle and the receiving plate is 30 cm, the extrusion rate is 2 mL/h, the temperature is 50 ℃, the humidity is 50%, the solution is directly deposited on the receiving plate in a disordered state, and the CsPbX is formed3An inorganic perovskite/polymer composite nanofiber membrane.
CsPbX prepared in this example3The morphology of the inorganic perovskite/polymer composite nanofiber membrane was similar to the results of example 3.
This example systemThe obtained CsPbX3The application of the inorganic perovskite/polymer composite nanofiber membrane in the perovskite solar cell is similar to that of example 1, and the photoelectric conversion efficiency of the assembled solar cell reaches 1.00%, as shown in fig. 5 (d).
In addition, CsPbX of the present embodiment3The inorganic perovskite/polymer composite nanofiber membrane can also be applied to a light emitting diode, as in example 1.
Comparative example 1:
the specific preparation process of the inorganic perovskite/polymer composite nanofiber membrane of the present comparative example:
0.228 g of PbBr was added first2And 0.101 g CsBr in 2 g DMSO, and magnetically stirring at 80 ℃ for 3h to obtain a clear solution;
then 0.15 g PVP and 0.15 g PAN are added into the solution, and the solution is stirred for 6 h by magnetic stirring at room temperature to obtain CsPbBr3The precursor spinning solution of (1);
and (3) filling the precursor spinning solution into an injector, and performing electrostatic spinning (the spinning process parameters are the same as those in example 1) to obtain the inorganic perovskite/polymer composite nanofiber membrane.
The inorganic perovskite/polymer composite nanofiber membrane of the comparative example is used as a light absorption layer to form a perovskite solar cell (the structure of the same example I), and the photoelectric conversion efficiency is only 0.02%, as shown in fig. 5 (e). This is because the addition of the polymer after the dissolution of the lead halide and cesium halide, which is caused by the order of addition of the polymer, results in the polymer encapsulating CsPbBr3An inorganic perovskite; due to the shielding of the polymer, the light capture efficiency of the polymer is inhibited, so that the generation efficiency of a photon-generated carrier is reduced, and the polymer completely blocks the effective contact between the perovskite and the charge transport layer, inhibits the transfer of charges, so that the photoelectric conversion efficiency of the polymer is lower.
In the above examples and alternatives, the mass ratio of polymer to organic solvent may also be 0.1: 1. 0.12: 1. 0.13: 1. 0.16: 1. 0.18: 1. 0.19: 1, etc.
In the above examples and alternatives, the organic solvent may also be dimethylformyl.
In the above embodiments and alternatives thereof, the polymer may further include at least one of polyvinylpyrrolidone, polyacrylonitrile, polyurethane (in addition to those disclosed in the above embodiments); when at least two kinds are included, the kinds of the respective polymers are in an arbitrary mass ratio.
In the above examples and alternatives, the mass ratio of the total mass of lead halide and cesium halide in the polymer solution to the organic solvent may also be 0.2: 1. 0.3: 1. 0.5: 1. 0.6: 1. 0.9: 1, etc.
In the above examples and alternatives, the molar ratio of lead halide to cesium halide can also be 0.5: 1. 1: 1. 2: 1. 3: 1. 4: 1. 5: 1, etc.
In the above examples and their alternatives, the process conditions of electrospinning are as follows:
the extrusion rate can also be 0.5 mL/h, 0.8 mL/h, 1.2 mL/h, 1.5 mL/h, 1.8 mL/h, and the like;
the voltage can also be 10 kV, 15 kV, 20 kV, 35 kV and the like;
the spinning environment temperature can also be 0 deg.C, 5 deg.C, 15 deg.C, 25 deg.C, 35 deg.C, 40 deg.C, 45 deg.C, etc.;
the humidity may also be 5%, 15%, 25%, 35%, 40%, 45%, etc.
The foregoing has outlined rather broadly the preferred embodiments and principles of the present invention and it will be appreciated that those skilled in the art may devise variations of the present invention that are within the spirit and scope of the appended claims.

Claims (7)

1. The preparation method of the inorganic perovskite/polymer composite nanofiber membrane is characterized by comprising the following steps:
s1, preparing a polymer solution in an organic solvent, wherein the polymer comprises at least one of polyvinylpyrrolidone, polyacrylonitrile and polyurethane;
s2, adding lead halide and cesium halide into the polymer solution to obtain spinning solution;
s3, performing electrostatic spinning on the spinning solution to obtain an inorganic perovskite/polymer composite nanofiber membrane;
the mass ratio of the polymer to the organic solvent is 0.09-0.2: 1;
the mass ratio of the total mass of the lead halide and the cesium halide in the polymer solution to the organic solvent is 0.1-1: 1, the molar ratio of the lead halide to the cesium halide is 0.5-5: 1;
the inorganic perovskite is positioned on the surface of the polymer nanofiber.
2. The method for preparing an inorganic perovskite/polymer composite nanofiber membrane as claimed in claim 1, wherein the process conditions of the electrospinning include: the extrusion rate is 0.1-2 mL/h, the voltage is 10-40 kV, the ambient temperature is 0-50 ℃, and the humidity is below 50%.
3. The method for preparing an inorganic perovskite/polymer composite nanofiber membrane according to claim 1, wherein the organic solvent is dimethyl sulfoxide.
4. The method of preparing an inorganic perovskite/polymer composite nanofiber membrane according to claim 1, wherein the inorganic perovskite comprises CsPbX3X = Cl, Br or I.
5. An inorganic perovskite/polymer composite nanofiber membrane, characterized by being produced by the production method as claimed in any one of claims 1 to 4.
6. Use of the inorganic perovskite/polymer composite nanofiber membrane according to claim 5, wherein the inorganic perovskite/polymer composite nanofiber membrane is applied to a perovskite solar cell or a light emitting diode.
7. The use of the inorganic perovskite/polymer composite nanofiber membrane according to claim 6, wherein the inorganic perovskite/polymer composite nanofiber membrane is used as a light absorbing layer of a perovskite solar cell or a photoluminescent layer of a light emitting diode.
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