Perovskite thin film continuous and uniform crystallization device and production line

Abstract

The utility model relates to a continuous and uniform perovskite film crystallization device and a production line. The continuous and uniform perovskite film crystallization device comprises a device body, the conveying assembly comprises a plurality of guide rollers rotationally connected to the device body, at least one driving roller rotationally connected to the device body and a rotation driving part with the output end connected with the driving roller, and the guide rollers and the driving rollers are sequentially wound with a film to be crystallized in the film conveying direction; the air knife assembly comprises an adjusting assembly arranged on the device body and used for adjusting the height and angle of an air knife, a first air knife connected to the output end of the adjusting assembly, and a second air knife arranged on the device body. Through the arrangement, uniform penetrating crystals can be formed, defects in the crystallization process can be effectively reduced, and meanwhile, the shutdown time and the energy consumption in the production process can be reduced through a continuous reel-to-reel production mode.

Description

Technical Field

[0001] The utility model relates to the technical field of perovskite film production devices, in particular to a perovskite film continuous and uniform crystallization device and a production line. Background Art

[0002] As the demand for clean energy grows, perovskite solar cells have attracted much attention as an efficient and inexpensive photoelectric conversion device. The flexible roll-to-roll preparation process can achieve large-scale and efficient production, providing important support for the commercial application of perovskite solar cells. The flexible roll-to-roll perovskite film crystallization preparation process is a method for preparing flexible roll-to-roll perovskite film crystals. Perovskite film is a material with excellent photoelectric properties and is widely used in solar cells, photoelectric sensors and other fields.

[0003] When preparing the above-mentioned perovskite film, traditional crystallization preparation equipment often has problems such as cracks, uneven crystallization and holes during the crystallization process, and is unable to form uniform and consistent through-crystals, resulting in a decrease in film performance. Utility Model Content

[0004] To this end, the technical problem to be solved by the utility model is to overcome the problems of cracks, uneven crystallization and holes that may occur in the prior art, making it impossible to form uniform and consistent through-crystals, resulting in a decrease in film performance, thereby providing a continuous and uniform crystallization device and production line for perovskite films.

[0005] In order to solve the above technical problems, the utility model provides a device for continuous and uniform crystallization of perovskite thin films, comprising:

[0006] device body;

[0007] A conveying assembly, comprising: a plurality of guide rollers rotatably connected to the device body, at least one driving roller rotatably connected to the device body, and a rotating driving member connected to the driving roller at the output end, wherein the guide rollers and the driving roller are sequentially wound with the film to be crystallized along the film conveying direction;

[0008] The wind knife assembly comprises: an adjustment assembly arranged on the device body for adjusting the height and angle of the wind knife, a first wind knife connected to the output end of the adjustment assembly, and a second wind knife arranged on the device body, wherein the second wind knife is arranged along the input side direction of the film on the first wind knife, and the wind curtain direction of the second wind knife is opposite to the film conveying direction.

[0009] In one embodiment of the present invention, the adjustment component includes: an angle adjustment component disposed on the device body, and a height adjustment component connected to an output end of the angle adjustment component.

[0010] In one embodiment of the utility model, the angle adjustment assembly includes: a first support body arranged on the device body, a back plate movably connected to the first support body, the first support body is arc-shaped, and the height adjustment assembly is connected to the back plate.

[0011] In one embodiment of the utility model, the height adjustment assembly includes: a second support body arranged on the back plate along the height direction, a die head movably connected to the second support body, a first air knife fixedly connected to the die head, and a lifting drive member connected to the output end and the second support body, and the wind curtain of the first air knife is parallel to the plane where the die head is located.

[0012] In one embodiment of the present invention, the die head is arranged above the driving roller, and the center of the circle of the first support body is the axis of the driving roller.

[0013] In one embodiment of the present invention, the number of the guide rollers is two groups, and the two groups of guide rollers are respectively arranged on the input side and the output side of the driving roller along the film conveying direction.

[0014] In one embodiment of the utility model, both ends of the driving roller and the guide roller are respectively fixedly sleeved on the bearing seats, the bearing seats are arranged on the device body, at least one side of the back plate is provided with a handle, the handle passes through the side wall of the device body and extends outward, the outer side wall of the device body is provided with scale lines adapted to the handle, the outer side wall of the device body is provided with a groove body adapted to the handle, and the curvature of the groove body is adapted to the first support body.

[0015] In one embodiment of the utility model, the air outlets of the first wind knife and the second wind knife are respectively provided with air guide plates, and the angle between the wind curtain of the second wind knife passing through the air guide plate and the plane where the film is located is 30-70°.

[0016] The utility model also discloses a production line, comprising the above-mentioned perovskite film continuous and uniform crystallization device.

[0017] In one embodiment of the utility model, the output side of the film to be crystallized is also connected to a corona machine, and the second air knife is also provided with a shaping mold along the film input direction.

[0018] The above technical solution of the utility model has the following advantages compared with the prior art:

[0019] The utility model discloses a device for continuous and uniform crystallization of perovskite film, in which airflow is generated from a first air knife and a second air knife, and the film is subjected to uniform air quenching treatment, at least one of the output wind curtains of the first air knife and the second air knife is hot air, and cooperates with the second air knife to blow the film in reverse, so that the second air knife generates shear force on the solution on the film, eliminates bubbles and holes, and keeps the viscosity of the fluid after shearing stable, and adopts lower air outlet temperature and air pressure for thinner films, while the air outlet temperature and air pressure need to be appropriately increased for thicker films, and by controlling the air outlet temperature, air pressure and multi-stage air knife as mentioned above, a uniform and consistent through-crystal is formed, which can effectively reduce the generation of defects in the crystallization process, improve the quality and stability of the film, and at the same time, the continuous production method can also reduce the downtime and energy consumption in the production process, thereby reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to make the content of the utility model easier to understand, the utility model is further described in detail according to the specific embodiments of the utility model in combination with the accompanying drawings, wherein

[0021] Figure 1 It is a front view of the crystallization device of the utility model;

[0022] Figure 2 This utility model Figure 1 The enlarged view of point A in the middle;

[0023] Figure 3 It is a three-dimensional diagram of the crystallization device of the utility model;

[0024] Figure 4 This utility model Figure 3 The enlarged view of point B in the middle;

[0025] Figure 5 This utility model Figure 3 Enlarged view of point C in the middle.

[0026] Explanation of the markings in the specification: 1. Device body; 2. Driving roller; 3. Guide roller; 4. Forming mold; 5. Back plate; 6. Lifting drive member; 7. First support body; 8. Corona machine; 9. Die head; 10. First air knife; 11. Second air knife; 12. Bearing seat; 13. Second support body; 14. Trough body; 15. Scale line; 16. Handle; 17. Rotating drive member; 18. Air guide plate. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0028] Example 1

[0029] Reference Figure 1-Figure 5 As shown, a device for continuous and uniform crystallization of a perovskite film of the utility model comprises:

[0030] Device body 1;

[0031] The conveying assembly comprises: a plurality of guide rollers 3 rotatably connected to the device body 1, at least one driving roller 2 rotatably connected to the device body 1, and a rotating driving member 17 connected to the driving roller 2 at the output end, wherein the guide rollers 3 and the driving roller 2 are sequentially wound with the film to be crystallized along the film conveying direction;

[0032] The wind knife assembly comprises: an adjustment assembly arranged on the device body 1 for adjusting the height and angle of the wind knife, a first wind knife 10 connected to the output end of the adjustment assembly, and a second wind knife 11 arranged on the device body 1, wherein the second wind knife 11 is arranged on the first wind knife 10 along the input side direction of the film, and the wind curtain direction of the second wind knife 11 is opposite to the film conveying direction.

[0033] The utility model discloses a device for continuous and uniform crystallization of a perovskite film, wherein a driving roller 2 is driven to rotate by a rotating driving member 17, and the driving roller 2 and the guide roller 3 are respectively attached to the film to be crystallized, and the film and the surfaces of the driving roller 2 and the guide roller 3 maintain tension, so that the coiled perovskite film is transported from the input side to the output side, and the adjustment component adjusts the height and angle of the first air knife 10, so that the air curtain of the first air knife 10 is perpendicular to the film, and airflow is generated from the first air knife 10 and the second air knife 11, and the film is uniformly gas-quenched, and at least one of the output air curtains of the first air knife 10 and the second air knife 11 is hot air, and The second air knife 11 is used to blow the film in the reverse direction, so that the second air knife 11 generates a shear force on the solution on the film, eliminates bubbles and voids, and keeps the viscosity of the fluid stable after shearing. A lower air outlet temperature and air pressure are used for thinner films, while the air outlet temperature and air pressure need to be appropriately increased for thicker films. By controlling the air outlet temperature, air pressure and multi-stage air knife as mentioned above, a uniform and consistent through-crystal is formed, which can effectively reduce the defects in the crystallization process and improve the quality and stability of the film. At the same time, the continuous production method can also reduce the downtime and energy consumption in the production process, thereby reducing production costs.

[0034] The adjustment component includes: an angle adjustment component arranged on the device body 1, and a height adjustment component connected to the output end of the angle adjustment component. The angle adjustment component and the height adjustment component are respectively used to adjust the position and angle of the first air knife 10 and the die head 9. The die head 9 is used to apply a dried surface layer to coat the covering layer, or to scrape and flatten the undried solution of the film to reduce and eliminate cracks and gaps on the film. In some embodiments, special gases, such as methylamine gas, can be introduced into the air knife to increase the grain size, reduce grain boundary defects, improve the extraction and transmission efficiency of carriers, and significantly reduce the residual stress and lattice distortion in the film.

[0035] Reference Figure 4-Figure 5 As shown, the angle adjustment component includes: a first support body 7 arranged on the device body 1, and a back plate 5 movably connected to the first support body 7, the first support body 7 is arc-shaped, and the back plate 5 can slide on the first support body 7 to adjust the angle of the air knife and the die head 9, and the height adjustment component is connected to the back plate 5, and can adjust the angle and height synchronously or independently.

[0036] Reference Figure 3-Figure 4 As shown, the height adjustment component includes: a second support body 13 arranged on the back plate 5 along the height direction, a die head 9 movably connected to the second support body 13, a first air knife 10 fixedly connected to the die head 9, and a lifting drive member 6 whose output end is connected to the second support body 13, the wind curtain of the first air knife 10 is parallel to the plane where the grinding head direction is located, and cooperates with the die head 9 for heating or cooling, and the lifting drive member 6 drives the die head 9 and the first air knife 10 to move along the height direction on the second support body 13 through the output end, thereby adjusting the height of the die head 9 and the air knife.

[0037] Continue to refer to Figure 3-Figure 4 As shown, the die head 9 is arranged above the driving roller 2, and the center of the circle of the first support body 7 is the axis of the driving roller 2, so that the die head 9 and the driving roller 2 can abut against each other and scrape and sweep the film between the die head 9 and the driving roller 2, and the driving roller 2 provides rolling support under the film. At the same time, the die head 9 presses down the film to improve the adhesion between the film and the driving roller 2 and prevent the film and the driving roller 2 from slipping. The first support body 7 and the second support body 13 are respectively provided with a slider and a back plate 5 and a grinding head to form a guide rail and a slider type sliding connection.

[0038] Reference Figure 1 As shown, there are two groups of guide rollers 3, which are respectively arranged on the input side and the output side of the driving roller 2 along the film conveying direction to prevent the film from loosening or deviating. A group of guide rollers 3 is arranged in front of the driving roller 2 to guide the film into the crystallization area, and a group of guide rollers 3 is also arranged behind the driving roller 2 to guide the film to be output from the crystallization area, for example, to the corona machine 8.

[0039] Reference Figure 1-Figure 3 As shown, the two ends of the driving roller 2 and the guide roller 3 are respectively fixedly sleeved on the bearing seat 12, and the bearing seat 12 is arranged on the device body 1. The driving roller 2 and the guide roller 3 are rotatably connected to the device body 1 through the bearing seat 12. A handle 16 is arranged on at least one side of the back plate 5, so as to adjust the angle of the wind knife through the handle 16. The handle 16 passes through the side wall of the device body 1 and extends outward. The outer wall of the device body 1 is provided with a scale line 15 adapted to the handle 16. The outer wall of the device body 1 is provided with a groove body 14 adapted to the handle 16. The curvature of the groove body 14 is adapted to the first support body 7. In some embodiments, there is a constant damping between the groove body 14 and the connecting handle of the handle 16, and the damping is greater than the torque of the handle 16 at any angle in the groove body 14, so as to achieve the effect of self-locking of the angle, or a bolt, a latch, etc. are arranged between the first support body 7 and the slider for locking, and the bolt or the latch passes through the slider into the first support body 7.

[0040] Reference Figure 1-Figure 2 As shown, the air outlets of the first wind knife 10 and the second wind knife 11 are respectively provided with wind guide plates 18, and the angle between the wind curtain of the second wind knife 11 passing through the wind guide plates 18 and the plane where the film is located is 30-70°. By adjusting the angle of the wind guide plates 18, the wind curtain and the plane where the film is located form an angle of 30-70°. In this embodiment, the angle is 50°, which can make the airflow better contact with the surface of the film, generate shear force, eliminate bubbles and holes, and at the same time stabilize the viscosity of the solution.

[0041] In order to achieve continuous production and avoid problems such as cracks, uneven crystallization and voids during the crystallization process, the following specific embodiments are adopted:

[0042] A roll-to-roll perovskite thin film crystallization process is used, which includes the following steps:

[0043] Step 1: Prepare the roll-to-roll perovskite thin film crystallization device, including multi-stage air knives and air outlets.

[0044] Step 2: Adjust the form and position of the multi-stage air knife to achieve uniform gas quenching effect.

[0045] Step 3: Control the temperature and wind pressure of the air outlet to adapt it to the needs of the crystallization process. According to experimental data, the air outlet temperature should be between 200-250℃ and kept constant; the wind pressure should be between 0.1-0.3MPa and adjusted according to the thickness of the crystallized film.

[0046] Step 4: Feed the roll-to-roll perovskite film into the crystallization device and start the device.

[0047] Step 5: Use a multi-stage air knife to blow hot air evenly onto the film to achieve the gas quenching effect during the crystallization process. Since the form and position of the multi-stage air knife have been adjusted appropriately, the gas quenching can be ensured to be uniform and consistent, effectively avoiding the generation of cracks, uneven crystallization and voids.

[0048] Step 6: Adjust the temperature and wind pressure at the air outlet to meet the crystallization requirements of films of different thicknesses. According to experimental data, thinner films can use lower air outlet temperature and wind pressure, while thicker films need to increase the air outlet temperature and wind pressure appropriately.

[0049] Example 2

[0050] The present embodiment discloses a production line, comprising a perovskite film continuous and uniform crystallization device as described in Example 1, and also comprising a feeding device, a subsequent processing device and a control system. The feeding device is used to supply the film material to be crystallized to the perovskite film continuous and uniform crystallization device, such as a roll-to-roll perovskite film coil feeding system, a solution coating device or other suitable feeding methods. The design of the feeding device should ensure that the film can smoothly enter the crystallization device and maintain appropriate tension and position. The subsequent processing device is used to further roll, process or treat the film after crystallization treatment, including drying, curing, packaging and storage. The control system is used to coordinate and monitor the operation of the entire production line, which includes sensors, controllers and actuators to ensure coordinated work between various devices, and automatically adjust and control according to preset process parameters, and independently control the wind pressure and temperature of the first air knife and the second air knife. The control system can also provide real-time monitoring and data recording to control and optimize the quality of the production process. In the production line, the perovskite film continuous and uniform crystallization device is used to achieve continuous and uniform crystallization of the film. The feeding device introduces the film to be processed into the crystallization device. After crystallization treatment, the film enters the subsequent processing device for further processing.

[0051] The output side of the film to be crystallized is also connected to a corona machine 8, and the second air knife 11 is also provided with a shaping mold 4 along the film input direction. The corona machine 8 generates plasma on the film surface through high voltage discharge, thereby changing the surface properties of the film and improving its adhesion.

[0052] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention of the utility model.

Claims

1. A device for continuous and uniform crystallization of perovskite thin films, characterized in that: include: device body; A conveying assembly, comprising: a plurality of guide rollers rotatably connected to the device body, at least one driving roller rotatably connected to the device body, and a rotating driving member connected to the driving roller at the output end, wherein the guide rollers and the driving roller are sequentially wound with the film to be crystallized along the film conveying direction; The wind knife assembly comprises: an adjustment assembly arranged on the device body for adjusting the height and angle of the wind knife, a first wind knife connected to the output end of the adjustment assembly, and a second wind knife arranged on the device body, wherein the second wind knife is arranged along the input side direction of the film on the first wind knife, and the wind curtain direction of the second wind knife is opposite to the film conveying direction.

2. The device for continuous and uniform crystallization of a perovskite thin film according to claim 1, characterized in that: The adjustment component includes: an angle adjustment component arranged on the device body, and a height adjustment component connected to the output end of the angle adjustment component.

3. A continuous and uniform crystallization device for perovskite thin films according to claim 2, characterized in that: The angle adjustment component comprises: a first support body arranged on the device body, and a back plate movably connected to the first support body, the first support body is arc-shaped, and the height adjustment component is connected to the back plate.

4. The device for continuous and uniform crystallization of a perovskite thin film according to claim 3, characterized in that: The height adjustment assembly includes: a second support body arranged on the back plate along the height direction, a die head movably connected to the second support body, a first air knife fixedly connected to the die head, and a lifting drive member whose output end is connected to the second support body, and the air curtain of the first air knife is parallel to the plane where the die head is located.

5. The device for continuous and uniform crystallization of a perovskite thin film according to claim 4, characterized in that: The die head is arranged above the driving roller, and the center of the first support body is the axis center of the driving roller.

6. The device for continuous and uniform crystallization of a perovskite thin film according to claim 1, characterized in that: The number of the guide rollers is two groups, and the two groups of guide rollers are respectively arranged on the input side and the output side of the driving roller along the film conveying direction.

7. The device for continuous and uniform crystallization of a perovskite thin film according to claim 3, characterized in that: The two ends of the driving roller and the guide roller are respectively fixedly sleeved on the bearing seats, and the bearing seats are arranged on the device body. A handle is arranged on at least one side of the back plate, and the handle passes through the side wall of the device body and extends outward. The outer wall of the device body is provided with scale lines adapted to the handle, and the outer wall of the device body is provided with a groove body adapted to the handle, and the curvature of the groove body is adapted to the first support body.

8. The device for continuous and uniform crystallization of a perovskite thin film according to claim 1, characterized in that: The air outlets of the first wind knife and the second wind knife are respectively provided with air guide plates, and the angle between the wind curtain of the second wind knife passing through the air guide plate and the plane where the film is located is 30-70°.

9. A production line, characterized in that: It also includes a continuous and uniform crystallization device for a perovskite thin film as described in any one of claims 1-8.

10. A production line according to claim 9, characterized in that: The output side of the film to be crystallized is also connected to a corona machine, and the second air knife is also provided with a shaping mold along the film input direction.

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