CN113155754A - Light-emitting film, oxygen detection device and manufacturing method thereof - Google Patents
Light-emitting film, oxygen detection device and manufacturing method thereof Download PDFInfo
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Abstract
The invention discloses a luminescent film, an oxygen detection device and a manufacturing method thereof, belongs to the technical field of optical sensing, and can solve the problems that an existing oxygen detection device is complex in manufacturing method and slow in response speed. The oxygen detection device comprises an excitation light source, a spectrum detector, a processor and a luminescent film; the luminescent thin film comprises perovskite nano-materials; the general formula of the perovskite nano material is A2(Ma,Fa)m‑1BmX3m+1Wherein A represents an organic long-chain macromolecule, B represents a divalent metal cation, X represents a halogen ion, and m represents the number of metal cation layers between organic chains. The light emitted by the excitation light source irradiates on the luminescent film and is used for exciting the luminescent film to generate an optical signal; the spectral detector is used for detecting the intensity of the optical signal; and the processor is used for calculating the oxygen concentration of the environment where the light-emitting film is located according to the intensity of the light signal. The invention is used for measuring the oxygen concentration.
Description
Technical Field
The invention relates to a luminescent film, an oxygen detection device and a manufacturing method thereof, belonging to the technical field of optical sensing.
Background
Oxygen, as an important gas, has been widely used in the fields of biochemistry, medical care, marine and space sciences, biotechnology, aerospace, and the like. Oxygen is used in life and production, the concentration of the oxygen must meet the use requirement, and if the oxygen concentration does not meet the standard or is not accurately controlled, serious potential safety hazard can be caused. The traditional oxygen concentration detection methods comprise a Winkler titration method, a Clark electrode method, a zirconia method, an ultrasonic method, an electrochemical method and the like, and the methods respectively have the defects of slow detection process, electrode consumption, incapability of realizing real-time monitoring and the like. In recent years, optical fiber oxygen sensors have been developed rapidly, and compared with conventional oxygen sensors, optical fiber oxygen sensors have unique advantages in many aspects, including high detection accuracy, high sensitivity, short response time, and capability of realizing remote, real-time and continuous monitoring of oxygen concentration, and research on the optical fiber oxygen sensors has attracted much attention in recent years. There are many sensing mechanisms of the optical fiber oxygen sensor, and the optical oxygen sensor based on the fluorescence quenching principle is widely researched due to the advantages of simple detection method, easy miniaturization of devices and the like. The optical oxygen sensor consists of an oxygen sensitive probe and a probe fixing material. Therefore, the preparation and research of the oxygen sensitive probe with sensitive oxygen response, high accuracy and good stability, and the construction of the fixed material with good oxygen permeability, high light transmittance and good optical property are the key for determining the optical oxygen sensor. To date, most oxygen probes in optical oxygen sensors are based on organic dyes, polycyclic aromatic hydrocarbons and metal-organic complexes. However, the preparation method of the oxygen probe is complex, and the oxygen probe only has high sensitivity to phosphorescence, thereby increasing the response time of the probe to the change of the oxygen concentration to a certain extent.
Disclosure of Invention
The invention provides a luminescent film, an oxygen detection device and a manufacturing method thereof, and can solve the problems that an existing oxygen detection device is complex in manufacturing method and slow in response speed.
In one aspect, the present invention provides a luminescent thin film comprising a perovskite nanomaterial; the general formula of the perovskite nano material is A2(Ma,Fa)m-1BmX3m+1Wherein A represents an organic long-chain macromolecule, B represents a divalent metal cation, X represents a halogen ion, and m represents the number of metal cation layers between organic chains.
Compared with three-dimensional tin-based perovskite quantum dots, the tin-based perovskite nano material can effectively protect the tin-based perovskite due to the fact that long-chain organic cations are introduced to form a two-dimensional structure, the stability of the structure is remarkably improved, and the fluorescence quantum yield is remarkably improved due to the quantum well confinement effect.
To obtain the two-dimensional structure with oriented orientation described herein, additives are used during the synthesis, and to obtain a dense structure, a two-step spin coating is followed by a vacuum-first followed by a thermal annealing treatment.
Optionally, the A is selected from one of PEA, TEA, BA, OA and DA; the B is selected from one of Sn, Sn/Pb and Sn/Mn; x is selected from one of Cl, Br and I.
Optionally, the perovskite nanomaterial has a size in at least one dimension of 2nm to 50 nm.
Optionally, the luminescence peak of the perovskite nano material is between 500nm and 1000 nm.
Optionally, the light-emitting film further comprises a polymer material; the polymeric material is selected from: at least one of silicone rubber, fluorosilicone, Polystyrene (PS), ethyl cellulose, organically modified silica gel, polyvinylidene fluoride (PVDF), poly (terephthalic acid) (PET) and polymethyl methacrylate (PMMA). Polystyrene (PS) and poly terephthalic acid (PET) have fixed emission wavelength under the irradiation of a UV excitation light source, the emission wavelength cannot change along with the change of oxygen concentration, and the emission wavelength can be used as a fluorescence reference probe to construct a ratio type fluorescence probe, so that the accuracy of the light-emitting film is obviously enhanced.
The in-situ preparation of the perovskite nano material/polymer material composite material provided by the application realizes the in-situ generation of the perovskite nano material in a polymer matrix in the spin coating process. Through the selection of the polymer, the concentration range of the material which is linearly sensitive to oxygen can be regulated. In addition, the perovskite nano material/polymer composite material prepared in situ not only has the advantages of high luminescent purity of the perovskite nano material, adjustable wavelength along with components and the like, but also has the characteristics of easy processing of polymer components, high mechanical strength, good flexibility, good water-resisting property and the like.
Optionally, the luminescent thin film further comprises a substrate, and the perovskite nano material or the composite material of the perovskite nano material and the polymer material is arranged on the substrate.
Optionally, the substrate may be at least one selected from a glass sheet, a silicon wafer, silicon oxide, polyethylene terephthalate, polyvinyl chloride, polyethylene, polypropylene, and polystyrene.
In another aspect, the present invention provides an oxygen detecting device, comprising an excitation light source, a spectrum detector, a processor, and any one of the above-mentioned luminescent films; the light emitted by the excitation light source is irradiated on the luminescent film and is used for exciting the luminescent film to generate an optical signal; the spectrum detector is used for detecting the intensity of the optical signal; and the processor is used for calculating the oxygen concentration of the environment where the light-emitting film is located according to the intensity of the optical signal.
Optionally, the wavelength of the excitation light source may be adjusted in the range from ultraviolet to visible light.
Optionally, the apparatus further includes a Y-shaped optical fiber, where the Y-shaped optical fiber includes an input end, a first output end, and a second output end; the excitation light source is connected with the input end of the Y-shaped optical fiber; the first output end of the Y-shaped optical fiber faces the light-emitting film; the light emitted by the excitation light source passes through the input end and the first output end of the Y-shaped optical fiber and then irradiates the light-emitting film so as to excite the light-emitting film to generate a light signal; the spectrum detector is connected with the second output end of the Y-shaped optical fiber and is used for detecting the intensity of the optical signal through the second output end of the Y-shaped optical fiber.
In yet another aspect, the present invention provides an oxygen detection device, comprising a digital source meter, a processor, and any one of the above-mentioned luminescent films; the digital source meter is used for supplying power to the light-emitting film so as to excite the light-emitting film to generate an optical signal; the digital source meter is also used for measuring the conductivity of the excited luminescent film; the processor is used for calculating the oxygen concentration of the environment where the light-emitting film is located according to the conductivity of the light-emitting film.
In another aspect, the present invention provides an oxygen detecting device, comprising an excitation light source, a spectrum detector, a digital source meter, a processor, and any one of the above-mentioned luminescent films; the light emitted by the excitation light source is irradiated on the luminescent film and is used for exciting the luminescent film to generate an optical signal; the spectrum detector is used for detecting the intensity of the optical signal; the digital source meter is used for measuring the conductivity of the excited luminescent film; the processor is used for calculating the oxygen concentration of the environment where the light-emitting film is located according to the intensity of the light signal and the conductivity of the light-emitting film.
Optionally, the wavelength of the excitation light source may be adjusted in the range from ultraviolet to visible light.
Optionally, the apparatus further includes a Y-shaped optical fiber, where the Y-shaped optical fiber includes an input end, a first output end, and a second output end; the excitation light source is connected with the input end of the Y-shaped optical fiber; the first output end of the Y-shaped optical fiber faces the light-emitting film; the light emitted by the excitation light source passes through the input end and the first output end of the Y-shaped optical fiber and then irradiates the light-emitting film so as to excite the light-emitting film to generate a light signal; the spectrum detector is connected with the second output end of the Y-shaped optical fiber and is used for detecting the intensity of the optical signal through the second output end of the Y-shaped optical fiber.
Optionally, the lighting device further comprises a housing, and the light-emitting film is arranged in the housing.
Optionally, a bracket is arranged in the housing; the light-emitting film is arranged on the bracket.
Optionally, the support angle of the support is adjustable.
In another aspect, the present invention provides a manufacturing method applied to any one of the above oxygen detection devices, including: drying the perovskite precursor solution to obtain a luminescent film; sealing the light-emitting film for blocking water and dust to obtain a sealed light-emitting film; arranging the sealed light-emitting film on an emergent light path of an excitation light source, and arranging a spectrum detector on the emergent light path of the sealed light-emitting film; and/or, connecting digital source meters on two opposite ends of the sealed luminescent film.
Wherein, dry perovskite precursor solution, obtain luminescent film, include specifically:
(1) obtaining an antisolvent and a precursor solution containing a perovskite precursor;
(2) and adding an anti-solvent into the precursor solution, and forming the precursor solution to obtain the luminescent film.
Optionally, the perovskite precursor solution comprises: organic solvent, AX and BX2(ii) a Wherein A represents organic long-chain macromolecules, B represents divalent metal cations, and X represents halogen ions.
Wherein the organic solvent is at least one selected from N, N-dimethylformamide, dimethyl sulfoxide, trimethyl phosphate, triethyl phosphate, N-methylpyrrolidone and dimethylacetamide.
Optionally, said AX and said BX2The molar ratio of (A) to (B) is 1.5-10: 1; the concentration of the perovskite precursor solution is 0.1-1.2M.
Optionally, the perovskite solution further comprises a polymeric material; the mass ratio of the polymer material to the perovskite precursor is 100: 0.01 to 30.
Optionally, the perovskite solution further comprises an additive; the additive is at least one selected from trimethylbutyric acid, n-butyric acid, acetic acid, propiolic acid, 2-methylpropanoic acid, valeric acid, 2-methylbutyric acid, 2, 2-dimethylpropionic acid, caproic acid, 3-methylvaleric acid, 4-methylvaleric acid and heptanoic acid.
The additive added is an aliphatic carboxylic acid containing a carbonyl group (-C ═ O-), the tin cation being stabilized by an electron-rich oxygen atom in the carbonyl group, and the halide being simultaneously stabilized by protic hydrogen. During nucleation, unstable halides and Sn liberated at the edges2+They may also be stabilized with carboxylic acids. The other binding surface of the carboxylic acid may attract free ions in solution that enter the surface of the successively grown perovskite leaving the binding of the carboxylic acid groups. The carboxylic acid is then re-bound to the labile surface atom. This repeated process accelerates the nucleation process, greatly reducing the Sn at the surface of the core2+Oxidation of (2). Through a plurality of experiments, the aliphatic carboxylic acid can obviously improve the quality of the tin halide perovskite nano material and improve the quantum yield.
Optionally, the ratio of the additive to the organic solvent is 1: 50 to 100.
Optionally, the forming in step (2) specifically includes:
and transferring the precursor solution to a template, and forming to obtain the luminescent film.
Optionally, the transferring comprises at least one of spin coating, dip-and-draw, electrospinning, solution-sinking, spraying, doctor blading, and casting.
The invention can produce the beneficial effects that:
(1) the luminescent film provided by the invention adopts an in-situ preparation method, the luminescent film generated in situ is of a layered two-dimensional structure, and has higher fluorescence quantum yield and stability in air compared with three-dimensional lead-free perovskite; and the characteristics of adjustable light-emitting wavelength and the like can be realized by changing the halogen components. In addition, the fluorescence intensity of the tin-based perovskite disclosed by the invention is well linearly or exponentially attenuated under the oxygen concentration of a certain concentration, and the fluorescence intensity can be recovered by vacuumizing and under the inert atmosphere environment, so that the fluorescence intensity can be reversible under the oxygen concentration of a certain range.
(2) The luminescent film provided by the invention adopts the general formula A2(Ma,Fa)m-1BmX3m+1The perovskite nano material has good luminous performance and ultrahigh sensitivity to oxygen, and the fluorescence intensity is in a linear or exponential change trend along with the change of the oxygen concentration.
(3) According to the oxygen detection device provided by the invention, the light emitted by the excitation light source is irradiated on the light-emitting film to excite the light-emitting film to generate the optical signal, the optical signal is received by the spectrum detector, and the intensity of the optical signal can change along with the change of the external oxygen concentration to be detected, so that the processor can obtain the corresponding oxygen concentration value according to the intensity of the optical signal detected by the spectrum detector, and the purpose of oxygen detection is further achieved. The oxygen detection device provided by the invention is simple in preparation process, low in cost and capable of being applied in a large scale.
(4) The oxygen detection device provided by the invention supplies power to the luminescent film by utilizing the digital source meter so as to excite the luminescent film to generate an optical signal; measuring the conductivity of the excited luminescent film by using a digital source meter; because the conductivity can change along with the change of the external oxygen concentration to be detected, the processor can obtain a corresponding oxygen concentration value according to the conductivity measured by the digital source meter, and further achieve the purpose of oxygen detection. The oxygen detection device provided by the invention is simple in preparation process, low in cost and capable of being applied in a large scale.
Drawings
FIG. 1 is a fluorescence emission spectrum of a luminescent film provided by an embodiment of the present invention;
fig. 2 is an XRD structure diagram of the luminescent film provided by the embodiment of the present invention;
FIG. 3 is a fluorescence emission spectrum of a luminescent film provided by an embodiment of the present invention at different oxygen concentrations;
FIG. 4 is a graph showing the change of the fluorescence spectrum of the luminescent film according to the oxygen concentration provided by the embodiment of the present invention;
FIG. 5 is a graph showing reversibility of fluorescence intensity at low oxygen concentration of a luminescent film according to an embodiment of the present invention;
FIG. 6 is a graph showing the change of the fluorescence spectrum of the luminescent film at a low oxygen concentration according to the embodiment of the present invention;
FIG. 7 is a schematic structural diagram of an oxygen detecting device according to an embodiment of the present invention;
FIG. 8 is a schematic structural diagram of an oxygen detecting device according to another embodiment of the present invention;
fig. 9 is a schematic structural diagram of an oxygen detecting device according to still another embodiment of the present invention.
List of parts and reference numerals:
11. a substrate/housing; 12. an excitation light source; 13. a light-emitting film; 14. a fiber optic probe; 15. a spectral detector; 16. a digital source table.
Detailed Description
The present invention will be described in detail with reference to the following examples and fig. 1 to 9, but the present invention is not limited to these examples.
The raw materials in the examples of the present application were all purchased commercially, unless otherwise specified.
Example 1
Polyvinylidene fluoride (PVDF) with PEAI and SnI2Mixing the powder; the mass ratio is controlled as follows: polymer (b): (PEAI + SnI)2) Control drug PEAI at 100: 10: SnI2The molar mass ratio is as follows: 10-1.5: 1. The powder was mixed well by mechanical low speed stirring for 0.5 h. Then mixing the mixed powder and an organic solvent (DMF: DMSO) in a mass ratio of 1: 7.2: 1.8, stirring for 12 hours on a magnetic stirrer, performing spin coating to form a film, wherein the rotating speed is 3500, the time is 60s, dropwise adding an anti-solvent before nucleation, vacuumizing for 3-5 minutes after spin coating to form a film, and then annealing at 100 ℃ for 15 minutes to obtain a red film with uniform dense distribution.
Example 2
Mixing PEAI and SnI2Mixing the powder according to the molar mass ratio of 10-1.5: 1, and dissolving the mixture in an organic solvent (DMF: DMSO: 4: 1) to obtain 0.1-1M precursor solution; stirring the mixture on a magnetic stirrer for 12 hours, and then filtering to obtain a more clear and transparent precursor solution. Spin-coating to form a film by a 2-step method, wherein the first step of the spin-coating is carried out at a rotating speed of 1000 for 10s, the second step of the spin-coating is carried out at a rotating speed of 5000 for 60s, an anti-solvent (aliphatic carboxylic acid: toluene-1: 50) is dripped before nucleation, and a dense and uniformly distributed brown to dark brown film is obtained after annealing treatment at 90-100 ℃ for 15 minutes after the spin-coating film formation.
Example 3
According to another aspect of the present application, there is provided an oxygen detecting device based on the fluorescence quenching principle, as shown in fig. 7, for detecting oxygen concentration, comprising a substrate/housing 11, an excitation light source 12 (e.g., LED) disposed on or in the substrate/housing, a light emitting thin film 13, and a fiber optic probe 14 for detecting fluorescence signal.
As shown in fig. 7, a luminescent film 13 based on tin perovskite coated on a glass slide is placed on a fixed support in a shell 11, the angle of the support is adjusted to be about 45 degrees, light beams emitted by an LED light source irradiate on the luminescent film 13 through a Y-shaped optical fiber, light emitted by the luminescent film 13 is received by a Y-shaped optical fiber probe 14, the fluorescent light intensity of the luminescent film 13 is attenuated in different degrees due to different external oxygen concentrations to be detected, so that the optical fiber probe 14 receives signals of different fluorescent light intensities, the optical fiber probe 14 transmits the received light signals to a spectrum detector through the Y-shaped optical fiber, the spectrum detector converts the light signals to output digital signals (fluorescent light intensity of a luminescent peak value), a processor calculates and outputs corresponding oxygen concentration values according to a function formula of the detected light intensity in advance attenuated along with the oxygen concentration, and displays the values through a display unit, the reading is convenient.
It should be noted that after the oxygen concentration of the external air is detected, the housing 11 is filled with nitrogen after the light-emitting film 13 is evacuated for 30 minutes, which serves to restore the fluorescence intensity of the light-emitting film 13 and protect the light-emitting film 13. The function of the built-in fluorescence intensity versus the oxygen concentration needs to be updated periodically.
Example 4
According to another aspect of the present application, there is provided another oxygen detecting device based on the change of electrical properties of a light emitting film with oxygen concentration, as shown in fig. 8, for detecting oxygen concentration, comprising a substrate/case 11, a light emitting film 13 deposited on a glass or silicon/silicon oxide substrate having an electrode coated thereon, and connected to a digital source meter 16(Keithley source meter) through a wire.
As shown in FIG. 8, a tin-based perovskite luminescent thin film 13 spin-coated on a glass substrate coated with an electrode on the surface thereof was placed on a fixed support in a case 11, and connected to a Keithley sourcemeter digital source meter 16 through a wire, and set to an ON voltage (O5V). The hole concentration increases with an increase in the oxygen concentration, and in the low oxygen concentration range, the conductivity of the light-emitting thin film 13 tends to increase exponentially with an increase in the oxygen concentration. The processor calculates and outputs a corresponding oxygen concentration value according to a function formula of the conductivity detected in advance along with the change of the oxygen concentration, and the value is displayed through the display unit, so that the reading is convenient.
Example 5
According to another aspect of the present application, in order to improve the accuracy of the measurement, a composite-reference oxygen concentration detection device is provided. The oxygen concentration detecting device of the composite parameter is shown in fig. 9, and comprises a substrate/shell 11, an excitation light source 12 (such as an LED) placed on or in the substrate/shell, a luminescent film 13, a Y-shaped optical fiber probe 14 for detecting a fluorescence signal, a spectrum detector 15 and a digital source meter 16. The part of the LED exciting the light-emitting film 13 is a non-plated electrode module, so that the fluorescence emitted by the light-emitting film 13 is not influenced by the reflectivity of the electrode material plated on the substrate. Generally, the single-wavelength fluorescence intensity detection mode is easily influenced by the environment and instruments, so that the fluorescence intensity and the electrical property of the luminescent film are combined with the change of a certain relation along with the change of the oxygen concentration, the defect of single-wavelength fluorescence detection can be effectively overcome, and the accuracy of the oxygen concentration detection device is improved to a great extent by the method for constructing the composite parameters.
Although the present application has been described with reference to a few embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the application as defined by the appended claims.
Claims (10)
1. A luminescent thin film, wherein the luminescent thin film comprises perovskite nanomaterials;
the general formula of the perovskite nano material is A2(Ma,Fa)m-1BmX3m+1Wherein A represents an organic long-chain macromolecule, B represents a divalent metal cation, X represents a halogen ion, and m represents the number of metal cation layers between organic chains.
2. The luminescent film of claim 1, wherein a is selected from one of PEA, TEA, BA, OA, DA; the B is selected from one of Sn, Sn/Pb and Sn/Mn; x is selected from one of Cl, Br and I;
preferably, the perovskite nanomaterial has a size in at least one dimension of 2nm to 50 nm;
preferably, the luminescence peak of the perovskite nano material is between 500nm and 1000 nm.
3. The luminescent film of claim 1, further comprising a polymeric material;
the polymeric material is selected from: at least one of organic silicon rubber, fluorosilicone, polystyrene, ethyl cellulose, organic modified silica gel, polyvinylidene fluoride, poly terephthalic acid and polymethyl methacrylate;
preferably, the luminescent thin film further comprises a substrate on which the perovskite nanomaterial or the composite of the perovskite nanomaterial and the polymer material is disposed;
preferably, the substrate may be selected from at least one of a glass sheet, a silicon wafer, silicon oxide, polyethylene terephthalate, polyvinyl chloride, polyethylene, polypropylene, and polystyrene.
4. An oxygen detection device, comprising an excitation light source, a spectral detector, a processor, and a luminescent film according to any one of claims 1 to 3;
the light emitted by the excitation light source is irradiated on the luminescent film and is used for exciting the luminescent film to generate an optical signal;
the spectrum detector is used for detecting the intensity of the optical signal;
the processor is used for calculating the oxygen concentration of the environment where the light-emitting film is located according to the intensity of the optical signal;
preferably, the wavelength of the excitation light source can be adjusted in the range from ultraviolet light to visible light;
preferably, the device further comprises a Y-shaped optical fiber, wherein the Y-shaped optical fiber comprises an input end, a first output end and a second output end;
the excitation light source is connected with the input end of the Y-shaped optical fiber; the first output end of the Y-shaped optical fiber faces the light-emitting film; the light emitted by the excitation light source passes through the input end and the first output end of the Y-shaped optical fiber and then irradiates the light-emitting film so as to excite the light-emitting film to generate a light signal;
the spectrum detector is connected with the second output end of the Y-shaped optical fiber and is used for detecting the intensity of the optical signal through the second output end of the Y-shaped optical fiber.
5. An oxygen detection device comprising a digital source meter, a processor, and the luminescent film of claim 1 or 2;
the digital source meter is used for supplying power to the light-emitting film so as to excite the light-emitting film to generate an optical signal;
the digital source meter is also used for measuring the conductivity of the excited luminescent film;
the processor is used for calculating the oxygen concentration of the environment where the light-emitting film is located according to the conductivity of the light-emitting film.
6. An oxygen detection device, comprising an excitation light source, a spectral detector, a digital source meter, a processor, and a luminescent film according to any one of claims 1 to 3;
the light emitted by the excitation light source is irradiated on the luminescent film and is used for exciting the luminescent film to generate an optical signal;
the spectrum detector is used for detecting the intensity of the optical signal;
the digital source meter is used for measuring the conductivity of the excited luminescent film;
the processor is used for calculating the oxygen concentration of the environment where the light-emitting film is located according to the intensity of the light signal and the conductivity of the light-emitting film;
preferably, the wavelength of the excitation light source can be adjusted in the range from ultraviolet light to visible light;
preferably, the device further comprises a Y-shaped optical fiber, wherein the Y-shaped optical fiber comprises an input end, a first output end and a second output end;
the excitation light source is connected with the input end of the Y-shaped optical fiber; the first output end of the Y-shaped optical fiber faces the light-emitting film; the light emitted by the excitation light source passes through the input end and the first output end of the Y-shaped optical fiber and then irradiates the light-emitting film so as to excite the light-emitting film to generate a light signal;
the spectrum detector is connected with the second output end of the Y-shaped optical fiber and is used for detecting the intensity of the optical signal through the second output end of the Y-shaped optical fiber.
7. The oxygen detection device of any one of claims 4 to 6, further comprising a housing, the luminescent film being disposed within the housing;
preferably, a bracket is arranged in the shell; the light-emitting film is arranged on the bracket;
preferably, the support angle of the bracket is adjustable.
8. A manufacturing method applied to the oxygen detection device as claimed in any one of claims 4 to 7, wherein the manufacturing method comprises the following steps:
drying the perovskite precursor solution to obtain a luminescent film;
sealing the light-emitting film for blocking water and dust to obtain a sealed light-emitting film;
arranging the sealed light-emitting film on an emergent light path of an excitation light source, and arranging a spectrum detector on the emergent light path of the sealed light-emitting film; and/or, connecting digital source meters on two opposite ends of the sealed luminescent film.
9. The method of manufacturing according to claim 8, wherein the perovskite precursor solution contains: organic solvent, AX and BX2(ii) a Wherein A represents organic long-chain macromolecules, B represents divalent metal cations, and X represents halogen ions;
preferably, said AX and said BX2The molar ratio of (A) to (B) is 1.5-10: 1;
the concentration of the perovskite precursor solution is 0.1-1.2M.
10. The method of manufacturing according to claim 9, wherein the perovskite solution further comprises a polymer material;
the mass ratio of the polymer material to the perovskite precursor is 100: 0.01 to 30;
preferably, the perovskite solution further comprises an additive;
the additive is at least one selected from trimethylbutyric acid, n-butyric acid, acetic acid, propiolic acid, 2-methylpropanoic acid, valeric acid, 2-methylbutyric acid, 2, 2-dimethylpropionic acid, caproic acid, 3-methylvaleric acid, 4-methylvaleric acid and heptanoic acid;
preferably, the ratio of the additive to the organic solvent is 1: 50 to 100.
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| CN113884472A (en) * | 2021-09-10 | 2022-01-04 | 福州大学 | Humidity detector based on luminous color interpretation and preparation method thereof |
| CN114685840A (en) * | 2022-02-24 | 2022-07-01 | 北京工业大学 | Perovskite thin film packaging method for water environment and application thereof |
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| CN113884472B (en) * | 2021-09-10 | 2023-09-29 | 福州大学 | Humidity detector based on luminous color interpretation and preparation method thereof |
| CN114685840A (en) * | 2022-02-24 | 2022-07-01 | 北京工业大学 | Perovskite thin film packaging method for water environment and application thereof |
| CN114685840B (en) * | 2022-02-24 | 2023-09-12 | 北京工业大学 | Perovskite film packaging method for water environment and application thereof |
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