CN113155754B - Luminous film, oxygen detection device and manufacturing method thereof - Google Patents
Luminous film, oxygen detection device and manufacturing method thereof Download PDFInfo
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Abstract
The invention discloses a luminescent film, an oxygen detection deviceThe manufacturing method 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 low in response speed. The oxygen detection device comprises an excitation light source, a spectrum detector, a processor and a luminous film; the luminescent film comprises perovskite nano-materials; the general formula of the perovskite nano material is A 2 (Ma,Fa) m‑1 B m X 3m+1 Wherein 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 the light-emitting film and is used for exciting the light-emitting film to generate light signals; 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 luminous 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 luminous film, an oxygen detection device and a manufacturing method thereof, and belongs to the technical field of optical sensing.
Background
Oxygen is an important gas and has been widely used in the fields of biochemistry, medical care, marine and space science, biotechnology, aerospace and the like. In life production, oxygen is used, the concentration of the oxygen must meet the use requirement, and serious potential safety hazards can be caused if the oxygen concentration does not reach the standard or the control is inaccurate. The traditional oxygen concentration detection method has the defects of a Winkler titration method, a Clark electrode method, a zirconia method, an ultrasonic method, an electrochemical method and the like, and the methods 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 rapidly developed, and compared with conventional oxygen sensors, optical fiber oxygen sensors have unique advantages in many aspects, including high detection accuracy, high sensitivity and short response time, and can realize remote, real-time and continuous monitoring of oxygen concentration, and research thereof has been paid great attention in recent years. The sensing mechanism of the optical fiber oxygen sensor is quite many, wherein the optical oxygen sensor based on the fluorescence quenching principle is widely studied due to the advantages of simple detection method, easy miniaturization of the device and the like. The optical oxygen sensor is composed of an oxygen sensitive probe and a probe fixing material. Therefore, the preparation and research of oxygen sensitive probes with sensitive response to oxygen, high accuracy and good stability, and the construction of a fixed material with good oxygen permeability, high light transmittance and good optical properties are key to determining an optical oxygen sensor. To date, oxygen probes in most 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, has high sensitivity only to phosphorescence, and increases the response time of the probe to oxygen concentration change to a certain extent.
Disclosure of Invention
The invention provides a luminescent film, an oxygen detection device and a manufacturing method thereof, which can solve the problems of complex preparation method and slower response speed of the existing oxygen detection device.
In one aspect, the present invention provides a luminescent thin film comprising perovskite nanomaterial; the general formula of the perovskite nano material is A 2 (Ma,Fa) m-1 B m X 3m+1 Wherein 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 the three-dimensional tin-based perovskite quantum dots, the tin-based perovskite nano material has the advantages that the perovskite 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 obviously improved, and the fluorescence quantum yield is obviously improved due to the quantum well confinement effect.
In order to obtain the two-dimensional structure with directional orientation described in the application, additives are used in the synthesis process, and in order to obtain a compact structure, a vacuum-pumping and then thermal annealing treatment is performed after the two-step spin coating.
Optionally, the 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.
Optionally, the perovskite nanomaterial has a size in at least one dimension of 2nm to 50nm.
Optionally, the luminescence peak of the perovskite nano material is between 500nm and 1000 nm.
Optionally, the luminescent film further comprises a polymeric material; the polymeric material is selected from: at least one of silicone rubber, fluorosilicone, polystyrene (PS), ethylcellulose, organically modified silica gel, polyvinylidene fluoride (PVDF), polyethylene terephthalate (PET), polymethyl methacrylate (PMMA). The Polystyrene (PS) and the polyethylene terephthalate (PET) have fixed emission wavelength under the irradiation of the UV excitation light source, the emission wavelength does not change along with the change of the oxygen concentration, and the fluorescent probe can be used as a fluorescent reference probe to construct a ratio type fluorescent probe, so that the accuracy of the luminescent film is obviously enhanced.
The perovskite nano material/polymer material composite material prepared in situ provided by the application realizes in-situ generation of the perovskite nano material in a polymer matrix in a spin coating process. By selecting the polymer, the concentration range of the material which is sensitive to oxygen linearity can be regulated. In addition, the perovskite nano material/polymer composite material prepared in situ has the advantages of high luminous purity of the perovskite nano material, adjustable wavelength along with components and the like, and has the characteristics of easy processing of polymer components, high mechanical strength, good flexibility, good water-proof performance and the like.
Optionally, the light-emitting film further includes a substrate, and the perovskite nanomaterial or the composite material of the perovskite nanomaterial and the polymer material is disposed on the substrate.
Alternatively, the substrate may be at least one selected from glass sheet, silicon wafer, silicon oxide, polyethylene terephthalate, polyvinyl chloride, polyethylene, polypropylene, polystyrene.
In another aspect, the present invention provides an oxygen detection device comprising an excitation light source, a spectrum detector, a processor, and any one of the luminescent films described above; the light emitted by the excitation light source irradiates the light-emitting film and is used for exciting the light-emitting film to generate light signals; 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 luminous film is located according to the intensity of the optical signal.
Alternatively, the wavelength of the excitation light source may be tuned in the ultraviolet to visible range.
Optionally, 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 irradiates the light-emitting film after passing through the input end and the first output end of the Y-shaped optical fiber so as to excite the light-emitting film to generate light signals; 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 luminescent films described above; the digital source meter is used for supplying power to the light-emitting film so as to excite the light-emitting film to generate light signals; 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 luminescent film is located according to the conductivity of the luminescent film.
In yet another aspect, the present invention provides an oxygen detection device comprising an excitation light source, a spectral detector, a digital source meter, a processor, and a luminescent film as described in any of the foregoing; the light emitted by the excitation light source irradiates the light-emitting film and is used for exciting the light-emitting film to generate light signals; 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 luminescent film is located according to the intensity of the light signal and the conductivity of the luminescent film.
Alternatively, the wavelength of the excitation light source may be tuned in the ultraviolet to visible range.
Optionally, 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 irradiates the light-emitting film after passing through the input end and the first output end of the Y-shaped optical fiber so as to excite the light-emitting film to generate light signals; 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 light-emitting film further comprises a shell, and the light-emitting film is arranged in the shell.
Optionally, a bracket is arranged in the shell; the luminous film is arranged on the bracket.
Optionally, the support angle of the bracket is adjustable.
In another aspect, the present invention provides a method for manufacturing an oxygen detecting device, which is applied to any one of the above methods, and the method includes: drying the perovskite precursor solution to obtain a luminescent film; sealing the light-emitting film to block water and dust to obtain a sealed light-emitting film; the sealed light-emitting film is arranged on an emergent light path of an excitation light source, and a spectrum detector is arranged on the emergent light path of the sealed light-emitting film; and/or connecting digital source meters on opposite ends of the sealed luminescent film.
Wherein, drying perovskite precursor solution to obtain luminescent film, specifically includes:
(1) Obtaining an antisolvent and a precursor solution containing a perovskite precursor;
(2) Adding an antisolvent into the precursor solution, and molding the precursor solution to obtain the luminescent film.
Optionally, the perovskite precursor solution comprises: organic solvent, AX and BX 2 The method comprises the steps of carrying out a first treatment on the surface of the Wherein A represents an organic long chain macromolecule, B represents a divalent metal cation, and X represents a halogen ion.
Wherein the organic solvent is at least one selected from N, N-dimethylformamide, dimethyl sulfoxide, trimethyl phosphate, triethyl phosphate, N-methylpyrrolidone and dimethylacetamide.
Optionally, the AX and the BX 2 The molar ratio of (2) is 1.5-10: 1, a step of; the concentration of the perovskite precursor solution is 0.1M-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 of trimethyl butyric acid, n-butyric acid, acetic acid, propiolic acid, 2-methylpropanoic acid, valeric acid, 2-methylbutanoic acid, 2-dimethylpropionic acid, caproic acid, 3-methylpentanoic acid, 4-methylpentanoic acid and heptanoic acid.
The additive is aliphatic carboxylic acid, wherein the additive contains functional group carbonyl (-C=O-), tin cation can be stabilized by oxygen atom rich in electron on carbonyl, and halide is simultaneously stabilized by proton hydrogen. During nucleation, unstable halides and free-edge Sn 2+ May also be stabilized with carboxylic acids. The other binding face of the carboxylic acid may attract free ions in solution that enter the surface of the successively grown perovskite and leave the binding of the carboxylic acid groups. The carboxylic acid then re-binds to the labile surface atoms. This isThe repeated process accelerates the nucleation process, greatly reduces Sn on the surface of the core 2+ Is a metal oxide semiconductor device. Through multiple experiments, the aliphatic carboxylic acid can obviously improve the quality of the tin halide perovskite nano material and the quantum yield.
Optionally, the ratio of the additive to the organic solvent is 1:50 to 100.
Optionally, the forming in the step (2) specifically includes:
and transferring the precursor solution to a template, and forming to obtain the luminescent film.
Optionally, the transferring includes at least one of spin coating, dip-coating, electrospinning, solution sinking, spraying, doctor blading, casting.
The invention has the beneficial effects that:
(1) The luminescent film provided by the invention adopts an in-situ preparation method, and the in-situ generated luminescent film has a layered two-dimensional structure, and has higher fluorescence quantum yield and stability in air compared with three-dimensional leadless perovskite; and the light-emitting wavelength can be adjusted by changing halogen components. In addition, the tin-based perovskite provided by the invention has good linear or exponential decay of fluorescence intensity under the oxygen concentration of a certain concentration, and can realize reversibility of fluorescence intensity under the oxygen concentration of a certain range by vacuumizing and realizing recovery of fluorescence intensity under the inert atmosphere environment.
(2) The luminous film provided by the invention adopts the general formula A 2 (Ma,Fa) m-1 B m X 3m+1 The perovskite nano material has better luminous performance, ultrahigh sensitivity to oxygen and linear or exponential trend of fluorescence intensity along with the change of oxygen concentration.
(3) According to the oxygen detection device provided by the invention, the light emitted by the excitation light source irradiates the light-emitting film, the light-emitting film is excited to generate the light signal, and the spectrum detector receives the light signal, so that the processor can obtain the corresponding oxygen concentration value according to the intensity of the light signal detected by the spectrum detector as the intensity of the light signal changes along with the change of the oxygen concentration of the outside to be detected, and the purpose of oxygen detection is further achieved. The oxygen detection device has simple preparation process and lower cost, and can be applied on a large scale.
(4) The oxygen detection device provided by the invention supplies power to the luminous film by utilizing the digital source meter so as to excite the luminous film to generate optical signals; 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 oxygen concentration outside to be detected, the processor can obtain a corresponding oxygen concentration value according to the conductivity measured by the digital source meter, thereby achieving the purpose of oxygen detection. The oxygen detection device has simple preparation process and lower cost, and can be applied on a large scale.
Drawings
FIG. 1 is a fluorescence emission spectrum of a luminescent film according to an embodiment of the present invention;
FIG. 2 is an XRD structure of a luminescent film according to an embodiment of the present invention;
FIG. 3 is a graph showing fluorescence emission spectra of a luminescent film according to an embodiment of the present invention under different oxygen concentrations;
FIG. 4 is a graph showing the change of the fluorescence spectrum of the luminescent film according to the oxygen concentration according to the embodiment of the present invention;
FIG. 5 is a graph showing the 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 variation of fluorescence spectrum of a luminescent thin film according to an embodiment of the present invention under low oxygen concentration;
FIG. 7 is a schematic diagram of an oxygen detecting device according to an embodiment of the present invention;
FIG. 8 is a schematic view 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 another embodiment of the present invention.
List of parts and reference numerals:
11. a base/housing; 12. an excitation light source; 13. a light emitting thin film; 14. an optical fiber probe; 15. a spectrum detector; 16. a digital source table.
Detailed Description
The present invention will be described in detail with reference to examples and fig. 1 to 9, but the present invention is not limited to these examples.
Unless otherwise indicated, all starting materials in the examples of the present application were purchased commercially.
Example 1
Polyvinylidene fluoride (PVDF) was combined with PEAI and SnI 2 Mixing the powder; the control mass ratio is as follows: and (2) polymer: (PEAI+SnI) 2 ) =100:10, control drug pei: snI (SnI) 2 The molar mass ratio is as follows: 10-1.5:1. The powder was mixed well for 0.5h with mechanical low speed stirring. And then mixing the mixed powder with an organic solvent (DMF: DMSO) according to the mass ratio of 1:7.2:1.8, stirring on a magnetic stirrer for 12 hours, performing spin coating to form a film, dropwise adding an anti-solvent before nucleation at the rotating speed of 3500 for 60 seconds, vacuumizing for 3-5 minutes after spin coating to form the film, and performing annealing treatment at 100 ℃ for 15 minutes to obtain the red film with uniform compact distribution.
Example 2
PEAI and SnI 2 Mixing the powder with the molar mass ratio of 10-1.5:1, and dissolving the mixture in an organic solvent (DMF: DMSO=4:1) to obtain a precursor solution with the concentration of 0.1M-1M; the mixture is stirred on a magnetic stirrer for 12 hours and then filtered to obtain a clearer and transparent precursor liquid. Spin-coating to form a film by a 2-step method, wherein the first step rotation speed is 1000, the time is 10s, the second step rotation speed is 5000, the time is 60s, an antisolvent (aliphatic carboxylic acid: toluene-1:50) is dropwise added before nucleation, and after spin-coating to form the film, annealing treatment is carried out at 90-100 ℃ for 15 minutes to obtain a brown-to-dark brown film with uniform compact distribution.
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) placed on or in the substrate/housing, a luminescent film 13, and a fiber optic probe 14 for detecting fluorescence signals.
As shown in fig. 7, a luminescent film 13 based on tin perovskite spin-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, a light beam emitted by an LED light source irradiates 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, and because the oxygen concentration of the outside to be detected is different, the fluorescence intensity of the luminescent film 13 is attenuated to different degrees, so that the optical fiber probe 14 receives signals of the fluorescence intensities of different magnitudes, 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 (the fluorescence intensities of luminescence peaks), and a processor calculates and outputs corresponding oxygen concentration values according to a function formula of the attenuation of the light intensity detected in advance along with the oxygen concentration, and the values are displayed through a display unit, so that the reading is convenient.
It should be noted that after detecting the oxygen concentration of the outside air, the case 11 is filled with nitrogen gas after the light emitting film 13 is evacuated for 30 minutes, and functions 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 is periodically updated.
Example 4
According to another aspect of the present application, there is provided another oxygen detecting device for detecting oxygen concentration based on a change in electrical property of a luminescent film with oxygen concentration, as shown in fig. 8, comprising a substrate/housing 11, a luminescent film 13 deposited on a glass or silicon/silicon dioxide substrate with electrodes coated on the surface, and a digital source meter 16 (Keithley sourcemeter) connected by wires.
As shown in fig. 8, a tin-based perovskite light emitting film 13 spin-coated on a glass substrate having an electrode plated surface was placed on a fixed support in a housing 11, and connected to a Keithley sourcemeter digital source meter 16 by a wire, and an on-voltage (O to 5V) was set. As the oxygen concentration increases, the hole concentration increases, and in the low oxygen concentration range, the conductivity of the light emitting thin film 13 tends to increase exponentially as the oxygen concentration increases. The processor calculates and outputs a corresponding oxygen concentration value according to a function formula of the conductivity which is detected in advance and changes along with 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 measurement, a composite reference oxygen concentration detection device is provided. The oxygen concentration detection 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) arranged on or in the substrate/shell, a luminescent film 13, a Y-type optical fiber probe 14 for detecting fluorescent signals, a spectrum detector 15 and a digital source meter 16. The part of the LED excited light-emitting film 13 is an electrode-free module, so that the fluorescence emitted by the light-emitting film 13 is not influenced by the reflectivity of electrode materials plated on the substrate. The fluorescent intensity detection mode of the single wavelength is easy to be influenced by the environment and the instrument, so that the fluorescent intensity and the electrical property of the luminescent film are combined with the change of the oxygen concentration in a certain relation, the defect of single-wavelength fluorescent 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.
The foregoing description is only a few examples of the present application and is not intended to limit the present application in any way, and although the present application is disclosed in the preferred examples, it is not intended to limit the present application, and any person skilled in the art may make some changes or modifications to the disclosed technology without departing from the scope of the technical solution of the present application, and the technical solution is equivalent to the equivalent embodiments.
Claims (19)
1. A method of manufacturing an oxygen detection device, the method comprising:
spin-coating the perovskite precursor solution into a film to obtain a luminescent film;
sealing the light-emitting film to block water and dust to obtain a sealed light-emitting film;
the sealed light-emitting film is arranged on an emergent light path of an excitation light source, and a spectrum detector is arranged on the emergent light path of the sealed light-emitting film; and/or connecting a digital source meter to the electrode output end of the sealed electrode-plated light-emitting film;
the luminescent film comprises perovskite nano-materials;
the general formula of the perovskite nano material is A 2 (Ma,Fa) m-1 B m X 3m+1 Wherein 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 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;
the perovskite nano material has a size of 2 nm-50 nm in at least one dimension;
the luminescence peak of the perovskite nano material is between 500nm and 1000 nm.
2. The method of claim 1, wherein the luminescent film further comprises 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.
3. The method of claim 2, wherein the luminescent film further comprises a substrate, and the perovskite nanomaterial or the composite of the perovskite nanomaterial and the polymer material is disposed on the substrate.
4. The method of claim 3, wherein the substrate is at least one selected from the group consisting of glass flakes, silicon wafers, silicon oxides, polyethylene terephthalate, polyvinyl chloride, polyethylene, polypropylene, and polystyrene.
5. The oxygen detecting device obtained by the manufacturing method according to any one of claims 1 to 4, comprising an excitation light source, a spectrum detector, a processor, and a light-emitting thin film;
the light emitted by the excitation light source irradiates the light-emitting film and is used for exciting the light-emitting film to generate light signals;
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 luminous film is located according to the intensity of the optical signal.
6. The oxygen detecting apparatus according to claim 5, wherein the wavelength of the excitation light source is adjustable in a range from ultraviolet to visible light.
7. The oxygen detection device of claim 5, further comprising a Y-fiber comprising 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 irradiates the light-emitting film after passing through the input end and the first output end of the Y-shaped optical fiber so as to excite the light-emitting film to generate light signals;
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.
8. The oxygen detecting device obtained by the manufacturing method according to any one of claims 1 to 4, comprising a digital source meter, a processor, and a light emitting film;
the digital source meter is used for supplying power to the light-emitting film so as to excite the light-emitting film to generate light signals;
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 luminescent film is located according to the conductivity of the luminescent film.
9. The oxygen detecting device obtained by the manufacturing method according to any one of claims 1 to 4, comprising an excitation light source, a spectrum detector, a digital source meter, a processor, and a light-emitting film;
the light emitted by the excitation light source irradiates the light-emitting film and is used for exciting the light-emitting film to generate light signals;
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 luminescent film is located according to the intensity of the light signal and the conductivity of the luminescent film.
10. The oxygen detection device of claim 9, wherein the wavelength of the excitation light source is adjustable in the ultraviolet to visible range.
11. The oxygen detection device of claim 9, further comprising a Y-fiber comprising 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 irradiates the light-emitting film after passing through the input end and the first output end of the Y-shaped optical fiber so as to excite the light-emitting film to generate light signals;
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.
12. The oxygen detection device of any one of claims 5 to 11, further comprising a housing, the luminescent film being disposed within the housing.
13. The oxygen detection device of claim 12, wherein a bracket is disposed within the housing; the luminous film is arranged on the bracket.
14. The oxygen detecting apparatus according to claim 13, wherein a supporting angle of the bracket is adjustable.
15. The method of claim 1, wherein the perovskite precursor solution comprises: organic solvent, AX and BX 2 The method comprises the steps of carrying out a first treatment on the surface of the Wherein A represents an organic long chain macromolecule, B represents a divalent metal cation, and X represents a halogen ion.
16. The method of claim 15, wherein AX and BX are the same 2 The molar ratio of (2) is 1.5-10: 1, a step of;
the concentration of the perovskite precursor solution is 0.1M-1.2M.
17. The method of making according to claim 15, wherein the perovskite precursor solution further comprises a polymeric material;
the mass ratio of the polymer material to the perovskite precursor is 100:0.01 to 30.
18. The method of making according to claim 15, wherein the perovskite precursor solution further comprises an additive;
the additive is at least one of trimethyl butyric acid, n-butyric acid, acetic acid, propiolic acid, 2-methylpropanoic acid, valeric acid, 2-methylbutanoic acid, 2-dimethylpropionic acid, caproic acid, 3-methylpentanoic acid, 4-methylpentanoic acid and heptanoic acid.
19. The method of claim 18, wherein the ratio of the additive to the organic solvent is 1:50 to 100.
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