Device for preparing perovskite wet film based on fumigation treatment

Abstract

The utility model discloses a kind of preparation device based on fumigation treatment perovskite wet film, including preparation box, cover body subassembly, the reaction pool of being able to heat and generate fumigation medium;Preparation box inside is equipped with first cavity and second cavity, upper end is equipped with exhaust port;First cavity and second cavity are interconnected by transition channel;Cover body subassembly is located in first cavity and is driven up and down and overturning action, with the support cover of internal bearing perovskite wet film base;Wherein fumigation medium can flow from second cavity to first cavity, and discharge from exhaust port.The utility model is by fumigation platform inversion, fumigation medium is in flowing state, can continuously and stably act on perovskite wet film, improve perovskite wet film steam dry effect, and sustained effort can be in-depth perovskite wet film inside, fill the hole formed by traditional direct steam dry solvent, and form a layer of interface film on the surface of perovskite film, form better high dense heterojunction perovskite film.

Description

Technical Field

[0001] This utility model relates to perovskite membrane preparation technology, specifically to a preparation device for perovskite wet membranes based on fumigation treatment. Background Technology

[0002] Perovskite films are used in solar cells and detectors due to their excellent photoelectric properties, such as high light absorption coefficient, long carrier diffusion length, and adjustable band gap. By adjusting the composition of perovskite, its band gap can be precisely controlled, thereby better matching visible light and X-ray spectrum. The traditional method for drying perovskite films involves coating a wet perovskite film onto a substrate, then drying the coated substrate under vacuum or heating it in air to evaporate the solvent and recrystallize the perovskite to form the film. This direct evaporation method usually results in an uneven cross-section and porosity in the perovskite film. To avoid the direct evaporation of the wet perovskite film, we use a fumigation treatment. This not only evaporates the wet perovskite film but also fills the pores formed by the traditional direct evaporation of the solvent and forms a layer of structural aggregate on the surface of the perovskite film. Currently, there are few devices available for preparing perovskite wet films using fumigation treatment. Some fumigation equipment involves filling a closed space with a high-temperature fumigation medium, and then allowing atoms to deposit on the surface of the perovskite film through solid sublimation, thereby modifying the surface of the perovskite film. This method is suitable for perovskite films, but it cannot penetrate deeper into the perovskite wet film, resulting in reduced drying efficiency and fumigation medium filling efficiency, and failing to form a good high-density heterojunction perovskite film. Utility Model Content

[0003] The purpose of this invention is to provide a preparation device for perovskite wet films based on fumigation treatment. The device has a simple and compact structure, which not only enables the fumigation medium to act continuously and stably on the perovskite wet film, improving the evaporation effect of the perovskite wet film, but also allows the continuous force to penetrate deep into the interior of the perovskite wet film, filling the pores formed by the traditional direct evaporation solvent, and forming a layer of structural aggregate on the surface of the perovskite film.

[0004] To achieve the above objectives, this apparatus for preparing perovskite wet films based on fumigation treatment includes: The preparation box has an internal first chamber and a second chamber arranged vertically and capable of being sealed, and an exhaust port at the upper end that communicates with the first chamber; the first chamber and the second chamber are connected to each other through a transition channel, and the transition channel is equipped with a regulating valve for regulating airflow. The cover assembly is located in the first cavity and is driven to move up and down and rotate, and has an axially penetrating support cover; the inside of the support cover is a fumigation platform that supports the perovskite wet film substrate. When flipped and moved downwards, the support cover can seal the outside of the transition channel, and the fumigation platform is inverted; The reaction tank, located within the second chamber, is capable of being heated to produce a fumigation medium; The second chamber is connected to the air supply assembly, and the exhaust port is connected to the exhaust assembly. Under the pressure difference between the exhaust assembly and the air supply assembly, the fumigation medium can flow from the second chamber to the first chamber and be discharged from the exhaust port.

[0005] In some examples of this invention, a vacuum component is also included; The output end of the vacuum component is connected to the first or second cavity, so that the corresponding cavity is in a vacuum state; The gas supplied to the gas supply component is an inert gas.

[0006] In some examples of this utility model, pressure sensors are provided at the second cavity and the exhaust port; The air supply assembly and exhaust assembly are equipped with pressure regulating valves connected to the controller on their respective connecting pipes. After receiving the signal from the pressure sensor, the controller controls the operation of the corresponding pressure regulating valve.

[0007] In some examples of this utility model, the gas delivery assembly has an inert gas source, a gas delivery pipe, and a pump body and a pressure regulating valve installed on the gas delivery pipe; The gas supply pipe is connected between the inert gas source and the second chamber; The exhaust assembly includes an exhaust pipe and a pump body and a pressure regulating valve mounted on the exhaust pipe; The exhaust pipe is connected to the exhaust port.

[0008] In some examples of this utility model, a sealing gasket is provided on the axial end side of the support cover; When the support cover is placed above the transition channel, the sealing gasket is pressed into contact with the bottom of the first cavity.

[0009] In some examples of this utility model, the support cover is provided with a guide plate, and the guide plate is provided with multiple through holes.

[0010] In some examples of this utility model, the support cover is respectively fixed with a horizontally arranged support shaft; All support shafts are rotatably mounted on the support slider, and one end of one of the support shafts is connected to the first drive component via a transmission assembly; The support slider moves up and down on the fixed plate and is driven by the lifting assembly.

[0011] In some examples of this utility model, the lifting assembly has a screw rod and a second driving member; The output end of the second driving component is fixedly connected to the screw rod, and the screw rod is threadedly connected to the support slider. Both the first and second driving components are connected to the controller, which controls the actions of the first and second driving components.

[0012] In some examples of this utility model, a temperature sensor for monitoring the temperature inside the corresponding cavity is provided in the first cavity or the second cavity. The temperature sensor transmits the monitoring signal to the controller, which then controls the heating temperature of the reaction tank.

[0013] In some examples of this utility model, the preparation box is equipped with a touch screen display that can show the operating status, a universal wheel with a locking structure installed at the lower end, and a first door panel for opening and closing the first cavity and a second door panel for opening and closing the second cavity on the front side.

[0014] Compared with the prior art, the preparation device based on fumigation treatment of perovskite wet film has the advantage of inverting the perovskite wet film by inverting the fumigation platform and allowing the fumigation medium to flow continuously and stably act on the perovskite wet film, thereby improving the drying effect of the perovskite wet film. Moreover, the continuous force can penetrate into the interior of the perovskite wet film, fill the pores formed by the traditional direct evaporation of solvent, and form a layer of heterojunction structure on the surface of the perovskite film, thus forming a better high-density heterojunction perovskite film. As the cover assembly is driven to move up and down and flip, the fumigation platform inside the support cover is inverted and upright, which facilitates the installation of the substrate and meets the preparation requirements. When the support cover is in place, it can reduce the flow space of the fumigation medium, so that the fumigation medium acts on the fumigation platform inside, and avoids it from spreading outward to the first cavity and causing flow instability. Since the output end of the vacuum component is connected to the first or second cavity, the corresponding cavity is in a vacuum state. The gas supply pipe in the gas supply component can be connected to an inert gas source. Therefore, this preparation device can be operated in air or in an inert gas environment and is suitable for different fumigation requirements. Attached Figure Description

[0015] Figure 1 This is the overall front view of this utility model (the support cover is away from the bottom of the first cavity); Figure 2 This is the overall main view of this utility model (the support cover is near the bottom of the first cavity); Figure 3 This is a front view of the cover assembly in this utility model; Figure 4 yes Figure 1 A magnified view of position A in the middle; Figure 5 yes Figure 1 A magnified view of position B in the middle; In the diagram: 10. Preparation chamber, 11. Partition, 12. First chamber, 13. Second chamber, 14. Transition channel, 15. Airflow regulating valve, 16. Exhaust port; 21. Reaction tank; 22. Heating assembly; 30. Cover assembly; 31. Support plate; 311. Through hole; 32. Support cover; 321. Sealing gasket; 322. Support shaft; 33. Fumigation platform; 34. Guide plate; 35. Clamping assembly; 36. Base. 41. First driving component; 42. Transmission assembly; 43. Fixing plate; 51. Second driving component; 52. Helical rod; 53. Support slider; 60. Vacuum components; 71. Air supply assembly; 72. Exhaust assembly; 73. Pressure regulating valve; 80. Temperature sensor. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0017] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, “an” or “a” and similar terms do not necessarily indicate a quantity limitation. Terms such as “comprising” or “including” mean that the element or object preceding the word encompasses the element or object listed following the word and its equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships; these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0018] like Figure 1 , Figure 2As shown, the apparatus for preparing perovskite wet films based on fumigation treatment includes: The housing 10 is prepared, and the interior is provided with a first cavity 12 and a second cavity 13 arranged vertically and capable of being sealed. The upper end is provided with an exhaust port 16 communicating with the first cavity 12. The first cavity 12 and the second cavity 13 are interconnected through a transition channel 14, and an airflow regulating valve 15 is provided on the transition channel 14. The cover assembly 30 is located inside the first cavity 12 and is driven to move up and down and flip, and has an axially penetrating support cover 32; the support cover 32 is provided with a fumigation platform 33 that carries the perovskite wet film substrate 36. When flipped over and moved downwards, the support cover 32 can seal the outside of the transition channel 14, and the fumigation platform 33 is inverted; The reaction tank 21 is located inside the second chamber 13 and is capable of being heated to generate a fumigation medium; The exhaust port 16 is connected to the exhaust assembly 72, and the second chamber 13 is connected to the air supply assembly 71. Under the pressure difference between the exhaust assembly 72 and the air supply assembly 71, the fumigation medium can flow from the second chamber 13 to the first chamber 12 and be discharged from the exhaust port 16.

[0019] Specifically, the lower end of the preparation box 10 is equipped with casters with a locking structure. The interior is divided into upper and lower cavities by a horizontally arranged partition 11. The front side is provided with a first door panel and a second door panel for opening and closing the corresponding cavities. When closed, the first door panel and the second door panel can be locked and fixed by a safety door latch, so that the corresponding cavities form a sealed space. The middle part of the first door panel and the second door panel can be made of transparent material to facilitate the operator's view. A transition channel 14 is set on the partition 11 and connects to the corresponding cavities. An airflow regulating valve 15 connected to the controller can be provided on the transition channel 14. The cover assembly 30 is driven to move up and down and to flip. The flipping is centered on the transverse axis, so that the fumigation platform 33 inside the support cover 32 is inverted and upright. The support cover 32 is axially penetrating to allow the fumigation medium to pass through. When the support cover 32 is in place, it can reduce the flow space of the fumigation medium, so that the fumigation medium is concentrated on the fumigation platform 33 inside, and avoids it from spreading outward to the first cavity 12 and causing flow instability. like Figure 3As shown, the fumigation platform 33 can be located inside the support cover 32 via a support frame, or the cover assembly 30 can also have a support plate 31 with multiple through holes 311. The support cover 32 is fixed on the support plate 31, and the fumigation platform 33 is fixed on the support plate 31. Furthermore, the fumigation platform 33 has a clamping assembly 35 that can fix the perovskite wet film substrate 36. As an example, the clamping assembly 35 is in multiple sets, each set having a clamping plate, a support rod, a spring, and a locking block. The support rod is fixed on the fumigation platform 33, and the clamping plate and spring are both fitted on the support rod. The locking block is threadedly connected to the support rod for adjustment. One end of the spring contacts the clamping plate, and the other end contacts the locking block. Under the action of the spring, the clamping plate is subjected to a spring force toward the fumigation platform 33, so that one end of the clamping plate can act on the substrate 36 for clamping and fixing. In addition, the clamping assembly 35 can also be other conventional structures, which will not be further described here. The reaction tank 21 can be heated by the heating component 22, such as an electric heating plate or a heating table; The exhaust assembly 72 can be an exhaust pipe, a pump body installed on the exhaust pipe, and an electric valve. The air supply assembly 71 can be an air supply pipe, a pump body installed on the air supply pipe, and an electric valve. The air pressure at the air supply point is greater than the pressure at the exhaust point, which allows the fumigation medium to flow directionally from the second chamber 13 to the first chamber 12 and the exhaust port 16. When using this perovskite wet film preparation device based on fumigation treatment, the perovskite precursor solution is first sprayed onto the substrate 36 to form a perovskite wet film. The substrate 36 carrying the perovskite wet film is placed on the fumigation platform 33 for fixation. Then, the fumigation solution is added to the reaction tank 21, and the first door plate and the second door plate are closed so that the first chamber 12 and the second chamber 13 are in a closed state. The support cover 32 is driven to flip and move up and down. Finally, the lower end of the support cover 32 covers the bottom of the first cavity 12 and the seal is located outside the transition channel 14. At this time, the fumigation platform 33 and its substrate 36 are in an inverted state, with the perovskite wet film facing downwards. The gas supply assembly 71 and the exhaust assembly 72 are activated, allowing gas to enter the support cover 32 and flow, heating the reaction tank 21. A fumigation medium at a certain temperature enters the first chamber 12 from the second chamber 13. The fumigation medium flows directionally from the second chamber 13 to the first chamber 12, stabilizing the fumigation of the inverted perovskite wet film. This directional flow not only allows the fumigation medium to continuously and stably act on the perovskite wet film, improving the evaporation effect of the perovskite wet film, but also allows the continuous force to penetrate deep into the interior of the perovskite wet film, filling the pores formed by the traditional direct evaporation solvent, and forming a layer of heterojunction structure on the surface of the perovskite film, forming a better high-density heterojunction perovskite film. Finally, the fumigation medium after fumigation is discharged from the exhaust port 16 along with the gas.

[0020] This apparatus for preparing perovskite wet films based on fumigation treatment can be operated in air or in an inert gas environment to suit different fumigation requirements. When operating in an air environment, the air supply component 71 in this apparatus for preparing perovskite wet films based on fumigation treatment is normally connected to an air source. When operating in an inert gas environment, such as Figure 2 As shown, the apparatus for preparing perovskite wet films based on fumigation treatment also includes a vacuum component 60; The output end of the vacuum assembly 60 is connected to the first cavity 12 or the second cavity 13, so that the corresponding cavity is in a vacuum state; The gas supplied to the gas supply assembly 71 is an inert gas; Furthermore, pressure sensors are provided at both the second cavity 13 and the exhaust port 16; The air supply assembly 71 and the exhaust assembly 72 are equipped with pressure regulating valves 73 connected to the controller on their respective connecting pipes. After receiving the signal from the pressure sensor, the controller controls the action of the corresponding pressure regulating valves 73. Specifically, the vacuum assembly 60 may include a vacuum pump and a first pipeline. The vacuum pump provides negative pressure to the system, and the first pipeline is connected to the first chamber 12 and the second chamber 13 for extracting gas from the corresponding chambers. The gas supply assembly 71 may have an inert gas source, a gas supply pipe, and a pump body and an electric valve installed on the gas supply pipe. The inert gas may be argon, nitrogen, etc. The gas supply pipe is connected to the inert gas source and the second chamber 13, so that the chamber is in an inert gas environment. When the vacuum assembly 60 completes the vacuuming, the gas supply assembly 71 and the exhaust assembly 72 are activated. The controller is a general term for control, which can control the adjustment action of the corresponding regulating valves to meet the preparation requirements; a touch screen display can be installed on the preparation chamber 10, and the initial value of the parameters can be set through the touch screen display to carry out automated control operation; The gas supply assembly 71 and the exhaust assembly 72 are equipped with pressure regulating valves 73 connected to the controller on their respective connecting pipes. After receiving the signal from the pressure sensor, the controller controls the action of the corresponding pressure regulating valves 73 so that the pressure of the inert gas entering the second chamber 13 is higher than the pressure at the exhaust port 16 after fumigation, so that the fumigation medium can flow directionally from the second chamber 13 to the first chamber 12.

[0021] In some examples of this utility model, such as Figure 3 As shown, a sealing gasket 321 is provided on the axial end side of the support cover 32; When the support cover 32 is placed over the transition channel 14, the sealing gasket 321 is pressed into contact with the bottom end of the first cavity 12. Specifically, after the support cover 32 is installed, the sealing gasket 321 is pressed into contact with the bottom end of the first cavity 12. At this time, the fumigation medium enters the interior of the support cover 32 directly from the transition channel 14, so that the fumigation medium is concentrated on the fumigation platform 33 inside, resulting in a better fumigation effect.

[0022] In some examples of this utility model, such as Figure 2 , Figure 3 As shown, the support cover 32 is provided with a guide plate 34, and the guide plate 34 is provided with a plurality of through holes 311; Specifically, when the gas or fumigation medium enters the support cover 32 from the second cavity 13 and the transition channel 14, the guide plate 34 can evenly distribute the gas or fumigation medium so as to act on the perovskite wet film.

[0023] In some examples of this utility model, such as Figure 3 , Figure 4 As shown, horizontally arranged support shafts 322 are fixed to the end sides of the support cover 32 respectively; All support shafts 322 are rotatably mounted on the support slider 53, and one end of one of the support shafts 322 is connected to the first drive member 41 through the transmission assembly 42; The support slider 53 is connected to the fixed plate 43 for vertical movement and is driven to move by the lifting assembly; Furthermore, such as Figure 5 As shown, the lifting assembly has a screw rod 52 and a second driving component 51; The output end of the second driving component 51 is fixedly connected to the screw rod 52, and the screw rod 52 is threadedly connected to one of the support sliders 53. Both the first driving component 41 and the second driving component 51 are connected to the controller, and the controller controls the actions of the first driving component 41 and the second driving component 51. Specifically, the support shaft 322 is fixedly installed on the end side of the support cover 32, and the axis is arranged laterally; the first drive component 41 and the second drive component 51 can both be motors; the transmission assembly 42 can be a gear set to adjust the flip angle, such as including: a main gear and a driven gear meshing with the main gear, the main gear is installed at the output end of the motor and the number of teeth is less than the number of teeth of the driven gear; a linear slide rail is provided between the support slider 53 and the fixed plate 43, and the fixed plate 43 is fixedly installed in the first cavity 12; When the support cover 32 needs to be flipped, the first drive member 41 is activated, causing the support cover 32 to rotate at least 180° on the support slider 53 via the transmission component 42, thus completing the upright and inverted positions of the support cover 32. When the support cover 32 needs to be moved up and down, the second drive member 51 is activated, driving the screw rod 52 to rotate, causing the support slider 53, which is threadedly connected to the screw rod 52, to move up and down, thus completing the up and down position adjustment of the support cover 32. Preferably, the support shaft 322 may be provided with an angle sensor for monitoring the flipping angle of the support cover 32, and the fixing plate 43 is provided with a strip hole for the support shaft 322 to pass through, and a position sensor for monitoring the position of the support cover 32 is provided thereon. After receiving the monitoring signal, the controller controls the actions of the first drive member 41 and the second drive member 51, which refer to starting, stopping, and reversing.

[0024] In some examples of this utility model, a temperature sensor 80 for monitoring the temperature inside the corresponding cavity is provided in the first cavity 12 or the second cavity 13. Temperature sensor 80 transmits the monitoring signal to the controller, which controls the heating temperature of reaction tank 21.

[0025] Example 1 This example demonstrates the preparation of perovskite films in an inert gas environment, specifically including the following steps: S1, Perovskite wet film preparation: 2.5g of Cs 0.05 FA 0.9 MA 0.05 PbI3 was dispersed in 200 mL of N,N-dimethylformamide and stirred and ultrasonically dispersed to obtain a uniform perovskite precursor solution of 0.0125 g / mL. The perovskite precursor solution obtained above is sprayed onto a substrate 36, which is conductive glass (ITO). The spraying area can be 5cm × 5cm, thereby obtaining a substrate 36 that carries a layer of perovskite wet film. S2, Preparation for debugging this preparation device: Open the first cavity 12, fix the substrate 36 of the perovskite wet membrane on the fumigation platform 33, and drive the support cover 32 to flip and move up and down so that the lower end of the support cover 32 covers the bottom of the first cavity 12 and the seal is located outside the transition channel 14. At this time, the substrate 36 is in an inverted state, the perovskite wet membrane is facing down, and the first cavity 12 is closed and sealed. Open the second chamber 13, take 10g of thiourea and place it in the reaction tank 21, then close the second chamber 13 to seal it. S3, Preparation of highly dense heterojunction perovskite thick films: Open the airflow regulating valve 15 of the transition channel 14, close the exhaust assembly 72 and the gas supply assembly 71, and start the vacuum assembly 60 to evacuate the first chamber 12 and the second chamber 13 to a vacuum; start the gas supply assembly 71 to fill the first chamber 12 and the second chamber 13 with nitrogen; start the exhaust assembly 72 so that the nitrogen enters the support cover 32 of the first chamber 12 from the second chamber 13 and the transition channel 14, and then exits from the exhaust port 16, in a bottom-up flow state; The reaction tank 21 is heated at a rate of 5℃ / min and the temperature is set at 160℃ for 3 hours. During this process, the fumigation medium enters the support cover 32 of the first chamber 12 from the second chamber 13 and the transition channel 14 with the airflow, and acts continuously and stably on the perovskite wet film before being discharged from the exhaust port 16. Finally, stop heating the reaction tank 21 and allow it to cool naturally to room temperature. Turn off the gas supply component 71 and the exhaust component 72, and remove the substrate from the fumigation platform 33 to obtain a high-density heterojunction perovskite thick film.

[0026] Example 2 This example demonstrates the preparation of perovskite films under normal conditions, and specifically includes the following steps: S1, Perovskite wet film preparation: 3.0 g of CsPbBr3 was dispersed in 300 mL of N-methylpyrrolidone. After stirring and ultrasonic dispersion, a uniform perovskite precursor solution of 0.01 g / mL was obtained. The perovskite precursor solution obtained above is sprayed onto a substrate 36, which is conductive glass (ITO). The spraying area can be 3cm × 3cm, thereby obtaining a substrate 36 that carries a layer of perovskite wet film. S2, Preparation for debugging this preparation device: Open the first cavity 12, fix the substrate 36 of the perovskite wet membrane on the fumigation platform 33, and drive the support cover 32 to flip and move up and down so that the lower end of the support cover 32 covers the bottom of the first cavity 12 and the seal is located outside the transition channel 14. At this time, the substrate 36 is in an inverted state, the perovskite wet membrane is facing down, and the first cavity 12 is closed and sealed. Open the second chamber 13, take 15g of thiourea and place it in the reaction tank 21, then close the second chamber 13 to seal it. S3, Preparation of highly dense heterojunction perovskite thick films: When the airflow regulating valve 15 of the transition channel 14 is opened, the air supply assembly 71 and the exhaust assembly 72 are activated, and the gas is introduced from the second chamber 13 and the transition channel 14 into the support cover 32 of the first chamber 12 and then discharged from the exhaust port 16, which is in a bottom-up flow state. The reaction tank 21 is heated at a rate of 5℃ / min and the temperature is set at 110℃ for 2 hours. During this process, the fumigation medium enters the support cover 32 of the first chamber 12 from the second chamber 13 and the transition channel 14 with the airflow, continuously and stably acting on the perovskite wet film, and then being discharged from the exhaust port 16. Finally, stop heating the reaction tank 21 and allow it to cool naturally to room temperature. Turn off the gas supply component 71 and the exhaust component 72, and remove the substrate from the fumigation platform 33 to obtain a high-density heterojunction perovskite thick film.

[0027] Compared to the traditional heating and annealing method for perovskite wet films, Examples 1 and 2 avoid the direct evaporation of the perovskite wet film. By heating low-boiling-point thiourea and adjusting the airflow, it is uniformly fumigated onto the perovskite wet film. On the one hand, the fumigating vapor at a certain temperature can evaporate the solvent in the perovskite wet film, causing the perovskite to recrystallize. On the other hand, the fumigating vapor can more easily penetrate into the interior of the perovskite wet film, filling the gaps formed by the evaporation of traditional heating and annealing. Furthermore, the sulfur atoms in the fumigated thiourea molecules can coordinate with the lead atoms in the perovskite film to form a dense heterostructure on the surface of the perovskite film, thereby optimizing the perovskite interface and promoting the extraction and migration rate of charge carriers at the perovskite interface.

[0028] The foregoing description, with reference to preferred embodiments, details an exemplary implementation of the apparatus for preparing perovskite wet films based on fumigation treatment. However, those skilled in the art will understand that various modifications and alterations can be made to the above specific embodiments without departing from the concept of this utility model, and various combinations can be made to the various technical features and structures proposed by this utility model without exceeding the protection scope of this utility model, which is determined by the appended claims.

Claims

1. An apparatus for preparing perovskite wet films based on fumigation treatment, characterized in that, include: Prepare a box (10) with a first cavity (12) and a second cavity (13) arranged vertically and capable of being sealed, and an exhaust port (16) connected to the first cavity (12) at the upper end; the first cavity (12) and the second cavity (13) are connected to each other through a transition channel (14), and a regulating valve (15) for regulating airflow is provided on the transition channel (14). The cover assembly (30) is located inside the first cavity (12) and is driven to move up and down and flip, and has an axially penetrating support cover (32); the support cover (32) is provided with a fumigation platform (33) that carries the perovskite wet film substrate (36). When flipped and moved downward, the support cover (32) can seal the outside of the transition channel (14), and the fumigation platform (33) is inverted; The reaction tank (21) is located inside the second chamber (13) and is capable of being heated to generate fumigation medium; The second chamber (13) is connected to the air supply assembly (71), and the exhaust port (16) is connected to the exhaust assembly (72). Under the pressure difference between the exhaust assembly (72) and the air supply assembly (71), the fumigation medium can flow from the second chamber (13) to the first chamber (12) and be discharged from the exhaust port (16).

2. The apparatus for preparing perovskite wet films based on fumigation treatment according to claim 1, characterized in that, It also includes a vacuum assembly (60); The output end of the vacuum assembly (60) is connected to the first cavity (12) or the second cavity (13), so that the corresponding cavity is in a vacuum state; The gas supplied to the gas supply assembly (71) is an inert gas.

3. The apparatus for preparing a perovskite wet film based on fumigation treatment according to claim 2, characterized in that, Pressure sensors are provided at both the second cavity (13) and the exhaust port (16); Pressure regulating valves (73) connected to the controller are provided on the corresponding connecting pipes of the air supply assembly (71) and the exhaust assembly (72). After receiving the signal from the pressure sensor, the controller controls the action of the corresponding pressure regulating valves (73).

4. The apparatus for preparing a perovskite wet film based on fumigation treatment according to claim 3, characterized in that, The gas delivery assembly (71) includes an inert gas source, a gas delivery pipe, and a pump body and a pressure regulating valve (73) installed on the gas delivery pipe. The gas supply pipe is connected between the inert gas source and the second chamber (13); The exhaust assembly (72) has an exhaust pipe and a pump body and a pressure regulating valve (73) mounted on the exhaust pipe; The exhaust pipe is connected to the exhaust port (16).

5. The apparatus for preparing a perovskite wet film based on fumigation treatment according to claim 1, characterized in that, The support cover (32) is provided with a sealing gasket (321) on the axial end side; When the support cover (32) is placed over the transition channel (14), the sealing gasket (321) is pressed against the bottom end of the first cavity (12).

6. The apparatus for preparing a perovskite wet film based on fumigation treatment according to any one of claims 1 to 4, characterized in that, The support cover (32) is provided with a guide plate (34), and the guide plate (34) is provided with multiple through holes (311).

7. The apparatus for preparing a perovskite wet film based on fumigation treatment according to any one of claims 1 to 4, characterized in that, The support cover (32) is fixed with a horizontally arranged support shaft (322) on each end side. All support shafts (322) are rotatably mounted on the support slider (53), and one end of one of the support shafts (322) is connected to the first drive member (41) through the transmission assembly (42); The support slider (53) moves up and down on the fixed plate (43) and is driven by the lifting assembly.

8. The apparatus for preparing a perovskite wet film based on fumigation treatment according to claim 7, characterized in that, The lifting assembly has a screw rod (52) and a second driving component (51); The output end of the second driving component (51) is fixedly connected to the screw rod (52), and the screw rod (52) is threadedly connected to the support slider (53); Both the first drive unit (41) and the second drive unit (51) are connected to the controller, and the controller controls the actions of the first drive unit (41) and the second drive unit (51).

9. The apparatus for preparing a perovskite wet film based on fumigation treatment according to claim 1, characterized in that, The first cavity (12) or the second cavity (13) is provided with a temperature sensor (80) for monitoring the temperature inside the corresponding cavity; The temperature sensor (80) transmits the monitoring signal to the controller, which controls the heating temperature of the reaction tank (21).

10. The apparatus for preparing a perovskite wet film based on fumigation treatment according to any one of claims 1 to 4, characterized in that, The preparation box (10) is equipped with a touch screen display that can show the operating status, a universal wheel with a locking structure at the lower end, and a first door panel for opening and closing the first cavity (12) and a second door panel for opening and closing the second cavity (13) on the front side.

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