Film layer preparation device

Abstract

The utility model relates to the technical field of semiconductors and photovoltaic cells, in particular to a film preparation device, and aims to solve the problems of high cost, low material utilization rate and low production efficiency of the film preparation device. The film layer preparation device comprises at least one process roller which extends in the first direction and is provided with an attachment face extending in the first direction, the process roller can rotate around the axis parallel to the first direction, and the attachment face is configured to make contact with the first surface of a product; wherein a solution can be attached to the attachment surface, and in the process that the process roller rotates around the axis parallel to the first direction, the attachment surface is in rolling contact with the first surface, so that at least part of the solution attached to the attachment surface can be attached to the first surface, and a film layer is prepared on the first surface of the product. The film preparation device is simple in structure, low in cost and convenient to maintain. In addition, according to the film layer preparation device, the film layer can be prepared on the first surface of the product through rotation of the process roller, continuous production can be achieved, and the film layer preparation efficiency is high.

Description

Technical Field

[0001] This application relates to the technical fields of semiconductors and photovoltaic cells, and particularly to a film layer preparation device. Background Art

[0002] Perovskite solar cells have advantages such as high absorption of visible light and rapid improvement in photoelectric conversion efficiency. Preparing a perovskite solar cell requires preparing a perovskite film layer on a silicon wafer. Currently, methods for preparing a perovskite film layer include evaporation coating, blade coating, slot coating, screen printing, spraying, inkjet printing, and other methods.

[0003] However, the film layer preparation devices used in the above film layer preparation methods have problems such as high cost, low material utilization rate, and low production efficiency. Summary of the Utility Model

[0004] In view of this, an embodiment of this application provides a film layer preparation device to solve the problems of high cost, low material utilization rate, and low production efficiency of the film layer preparation device.

[0005] In a first aspect, an embodiment of this application provides a film layer preparation device, including: at least one process roll extending in a first direction, having an attachment surface extending in the first direction, the process roll being capable of rotating about an axis parallel to the first direction, and the attachment surface being configured to contact a first surface of the product; wherein, the attachment surface is capable of attaching a solution, and during the rotation of the process roll about an axis parallel to the first direction, the attachment surface makes a rolling contact with the first surface, so that at least part of the solution attached to the attachment surface can be attached to the first surface.

[0006] In combination with the first aspect, in certain implementation manners of the first aspect, the process roll has a chamber and at least one liquid outlet communicating the chamber with the attachment surface; wherein, the chamber is configured to accommodate the solution, and the solution can flow to the attachment surface through the liquid outlet; when the number of the liquid outlets is multiple, the multiple liquid outlets are evenly distributed on the attachment surface.

[0007] In combination with the first aspect, in certain implementation manners of the first aspect, the film layer preparation device further includes: a solution injection assembly communicating with the chamber and configured to inject the solution into the chamber.

[0008] In combination with the first aspect, in certain implementation manners of the first aspect, the process roll is further configured to carry the product; the film layer preparation device further includes: a container disposed below the process roll, having a receiving chamber and an opening facing upward, the opening communicating with the receiving chamber; wherein, the solution dripping from the process roll can enter the receiving chamber through the opening.

[0009] In combination with the first aspect, in certain implementations of the first aspect, the shape of the orthographic projection of the liquid outlet on the attachment surface includes one or more of the following shapes: circular, elongated, polygonal.

[0010] In combination with the first aspect, in certain implementations of the first aspect, the process roll includes: a process roll body extending along the first direction, having a side surface extending along the first direction, and the process roll body being capable of rotating about an axis parallel to the first direction. Among them, the process roll body has the chamber and at least one first sub-liquid outlet communicating the chamber with the side surface of the process roll body; a flexible film layer wrapping the side surface of the process roll body, and the surface of the flexible film layer away from the side surface of the process roll body forms the attachment surface. Among them, the flexible film layer has at least one second sub-liquid outlet, and the second sub-liquid outlet communicates with the first sub-liquid outlet to form the liquid outlet.

[0011] In combination with the first aspect, in certain implementations of the first aspect, the product further has a second surface disposed opposite to the first surface; among them, the film layer preparation device further includes: at least one pressure roll, the pressure roll being disposed adjacent to the process roll, extending along the first direction, having an extrusion surface extending along the first direction, and the pressure roll being capable of rotating about an axis parallel to the first direction; among them, the product can be disposed between the adjacent pressure roll and the process roll, and during the rotation of the process roll about an axis parallel to the first direction, the extrusion surface rolls into contact with the second surface and applies a pressure towards the attachment surface to the product.

[0012] In combination with the first aspect, in certain implementations of the first aspect, the number of the process rolls is multiple, and the multiple process rolls are sequentially disposed along a second direction, and the attachment surfaces of at least two of the multiple process rolls jointly carry the product, and the second direction is perpendicular to the first direction.

[0013] In combination with the first aspect, in certain implementations of the first aspect, the film layer preparation device further includes: a loading assembly configured to carry the product and transport the product to the process roll; and / or, an unloading assembly configured to carry the product and receive the product carried by the process roll.

[0014] In connection with the first aspect, in certain implementations of the first aspect, the film layer preparation device further includes: a drying assembly, disposed adjacent to the process roll and configured to provide heat energy to the process roll; and / or, the film layer preparation device further includes: a housing having an accommodation space, an air inlet and an air outlet communicating with the accommodation space, the process roll being disposed in the accommodation space, and the product being capable of being placed in the accommodation space; wherein, impurity gas can flow out of the accommodation space through the air outlet, and inert gas can flow into the accommodation space through the air inlet; and / or, the film layer preparation device further includes: a support assembly configured to support the process roll, the process roll being rotatably connected to the support assembly about an axis parallel to the first direction; at least one first driving assembly connected to the process roll and configured to drive the process roll to rotate about an axis parallel to the first direction.

[0015] In connection with the first aspect, in certain implementations of the first aspect, the solution includes a perovskite solution, and a perovskite film layer is formed after the perovskite solution is attached to the first surface.

[0016] The film layer preparation device provided by the embodiments of the present application uses the rotation of the process roll to achieve rolling contact with the first surface of the product, thereby attaching the solution attached to the attachment surface to the first surface, and realizing the preparation of the film layer on the first surface of the product. The film layer preparation device has a simple structure, low cost, and is easy to maintain. In addition, the film layer preparation device can realize the preparation of the film layer on the first surface of the product by the rotation of the process roll, can realize continuous production, and has high efficiency in film layer preparation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] By describing the embodiments of the present application in more detail in conjunction with the drawings, the above and other objects, features, and advantages of the present application will become more obvious. The drawings are used to provide a further understanding of the embodiments of the present application, and constitute a part of the specification, and are used to explain the present application together with the embodiments of the present application, and do not constitute a limitation to the present application. In the drawings, the same reference numerals generally represent the same components or steps.

[0018] Figure 1 The structure diagram of the film layer preparation device provided by an embodiment of the present application is shown.

[0019] Figure 2 The structure diagram of the process roll provided by another embodiment of the present application is shown.

[0020] Figure 3 The schematic cross-sectional view of the process roll provided by an embodiment of the present application is shown.

[0021] Figure 4 The structure diagram of the film layer preparation device provided by another embodiment of the present application is shown.

[0022] Figure 5 The following is a schematic structural diagram of a process roller, a pressure roller, and a product provided by an embodiment of the present application.

[0023] Figure 6 The following is a schematic structural diagram of a film layer preparation device provided by another embodiment of the present application.

[0024] Figure 7 The following is a schematic structural diagram of a film layer preparation device provided by another embodiment of the present application.

[0025] Figure 8 The following is a schematic structural diagram of a film layer preparation device provided by another embodiment of the present application.

[0026] Figure 9 The following is a schematic structural diagram of a film layer preparation device provided by another embodiment of the present application.

[0027] Figure 10 The following is a schematic structural diagram of a blanking roller provided by an embodiment of the present application.

[0028] Reference numerals:

[0029] 1. Film layer preparation device; 10. Process roller; 11. Attachment surface; 110. Process roller main body; 111. Chamber; 112. Liquid outlet; 113. First sub-liquid outlet; 114. Second sub-liquid outlet; 120. Flexible film layer; 20. Container; 21. Accommodation chamber; 22. Opening; 30. Pressure roller; 31. Extrusion surface; 40. Feeding assembly; 41. Feeding roller; 42. Transition roller; 50. Blanking assembly; 51. Blanking roller; 511. Bearing section; 512. Connection section; 60. Drying assembly; 70. Housing; 71. Accommodation space; 72. Air inlet; 73. Air outlet; 80. Support assembly; 90. First driving assembly; 100. Solution injection assembly; 2. Product; 201. First surface; 202. Second surface; 203. First end; 204. Second end; 3. Solution; X1. First direction; Y1. Second direction; X2. Third direction. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0031] The methods for preparing perovskite film layers include evaporation coating method, blade coating method, slot coating method, screen printing method, spraying method, inkjet printing, etc. The disadvantages of the evaporation coating method are: it is only applicable to the preparation of dry perovskite, high energy consumption, the entire cavity is contaminated, difficult to clean, low material utilization rate, and high equipment cost. The disadvantages of the blade coating method are: great damage to the bottom layer of the battery, low utilization rate of perovskite solution, and poor uniformity of the prepared perovskite layer. The disadvantages of the slot coating method are: low efficiency and high equipment cost. The disadvantages of the screen printing method are: low material utilization rate. The disadvantages of the spraying method are: extremely low material utilization rate, poor film adhesion, low bonding strength, poor film uniformity, and poor repeatability. The disadvantages of inkjet printing are: high cost and low efficiency. In other words, the main problems existing in the film layer preparation devices used in the above film layer preparation methods are high cost, low material utilization rate, and low production efficiency.

[0032] In view of the main problems existing in the above film layer preparation devices, this application is proposed. The following will describe the film layer preparation device in detail with reference to the accompanying drawings.

[0033] Figure 1 The structural schematic diagram of a film layer preparation device provided by an embodiment of this application is shown. Figure 2 The structural schematic diagram of a process roller provided by another embodiment of this application is shown. Figure 3 The schematic diagram of the cross-section of a process roller provided by an embodiment of this application is shown. Figure 4 The structural schematic diagram of a film layer preparation device provided by another embodiment of this application is shown. Figure 5 The structural schematic diagram of a process roller, a pressure roller, and a product provided by an embodiment of this application is shown. As Figures 1 to 5 shown, the film layer preparation device 1 includes: at least one process roller 10.

[0034] At least one process roller 10 extends along the first direction X1, is provided with an attachment surface 11 extending along the first direction X1, and the process roller 10 can rotate around an axis parallel to the first direction X1. The attachment surface 11 is configured to contact the first surface 201 of the product 2. The attachment surface 11 can attach the solution 3, and during the rotation of the process roller 10 around an axis parallel to the first direction X1, the attachment surface 11 makes rolling contact with the first surface 201, so that at least part of the solution 3 attached to the attachment surface 11 can be attached to the first surface 201, realizing the preparation of a film layer on the first surface 201 of the product 2. The film layer preparation device 1 has a simple structure, low cost, and is easy to maintain. In addition, the film layer preparation device 1 can realize the preparation of a film layer on the first surface 201 of the product 2 by the rotation of the process roller 10, can achieve continuous production, and has high film layer preparation efficiency.

[0035] Exemplarily, product 2 can be a substrate for preparing a perovskite solar cell. Exemplarily, product 2 can be a sheet-like structure, such as a silicon wafer, a glass substrate, a wafer, etc. Exemplarily, the size of product 2 can be 210mm x 210 mm. Product 2 can also be a block structure or a strip structure, which is not specifically limited in this application. In some embodiments, solution 3 can be a perovskite solution. After the perovskite solution is attached to the first surface 201, a perovskite film layer is formed. The viscosity and concentration of the perovskite solution can be adjusted as needed, so as to facilitate the attachment of the perovskite solution to the first surface 201 of product 2 and improve the uniformity of the prepared film layer.

[0036] Exemplarily, process roller 10 can include structures such as a cylindrical structure and a rod-like structure. The process roller 10 is provided with an attachment surface 11 extending along the first direction X1. Exemplarily, the process roller 10 is a cylindrical structure, and the attachment surface 11 is the side surface of the cylindrical structure. The process roller 10 can rotate around an axis parallel to the first direction X1, and the attachment surface 11 is configured to carry product 2 and contact the first surface 201 of product 2.

[0037] Exemplarily, the first surface 201 is located on the lower surface of product 2. Exemplarily, the attachment surface 11 is the surface of a cylindrical structure. The attachment surface 11 carries product 2. As the process roller 10 rotates, the attachment surface 11 rolls on the first surface 201, so that product 2 moves along the second direction Y1. Thus, while transporting product 2, solution 3 is attached to the first surface 201 of product 2 to form a film layer, improving the preparation efficiency of the film layer.

[0038] In some embodiments, the process roller 10 has a chamber 111 and at least one liquid outlet 112 connecting the chamber 111 and the attachment surface 11. The chamber 111 is configured to hold solution 3, and solution 3 can flow to the attachment surface 11 through the liquid outlet 112.

[0039] In some embodiments, the film layer preparation device 1 further includes a solution injection assembly 100. The solution injection assembly 100 is connected to the chamber 111 and is configured to inject solution 3 into the chamber 111.

[0040] In some embodiments, the process roller 10 is further configured to carry product 2. The film layer preparation device 1 further includes a container 20. The container 20 is disposed below the process roller 10. The container 20 is provided with a receiving chamber 21 and an opening 22 facing upward. The opening 22 is connected to the receiving chamber 21. The solution dripping from the process roller 10 can enter the receiving chamber 21 through the opening 22. The container 20 can be a container such as a solution pool or a solution box, as long as it can hold solution 3. Exemplarily, the solution 3 attached to the process roller 10 can also drip into the container 20, realizing the reuse of solution 3 and improving the utilization rate of solution 3.

[0041] In some embodiments, the number of process rollers 10 is multiple, and the multiple process rollers 10 are arranged in sequence along the second direction Y1. At least two of the multiple process rollers 10 jointly carry the product 2 on their respective attachment surfaces 11, and the second direction Y1 is perpendicular to the first direction X1. Exemplarily, both the first direction X1 and the second direction Y1 are horizontal directions.

[0042] By enabling the respective attachment surfaces 11 of the multiple process rollers 10 to jointly carry the product 2, the first surface 201 of the product 2 can be brought into contact with the attachment surfaces 11 of the multiple process rollers 10, so that the first surface 201 of the product 2 can come into contact with the attachment surfaces 11 of the process rollers 10 multiple times. As a result, the first surface 201 of the product 2 is coated with the solution 3 multiple times, preventing partial areas of the first surface 201 from being missed during coating, and further improving the uniformity of the film layer prepared on the first surface 201 of the product 2.

[0043] In addition, by jointly carrying the product 2 with multiple process rollers 10, multi-point support for the product 2 is achieved, improving the stability of the product 2.

[0044] In some embodiments, the number of liquid outlets 112 is multiple, and the multiple liquid outlets 112 are evenly distributed on the attachment surface, improving the uniformity of film layer preparation.

[0045] In some embodiments, the shape of the orthographic projection of the liquid outlet 112 on the attachment surface 11 includes one or more of the following shapes: circular, elongated, and polygonal. The shape of the orthographic projection of the liquid outlet 112 on the attachment surface 11 can also be other shapes, and the present application does not make specific limitations.

[0046] In some embodiments, the process roller 10 includes a process roller main body 110 and a flexible film layer 120. The process roller main body 110 can be a cylindrical structure, a rod-shaped structure, or other structures. The material of the flexible film layer 120 can be an elastic material such as rubber or sponge.

[0047] The process roller main body 110 extends along the first direction X1 and has a side surface extending along the first direction X1. The process roller main body 110 can rotate around an axis parallel to the first direction X1.

[0048] The process roller main body 110 has a chamber 111 and at least one first sub-liquid outlet 113 that connects the chamber 111 to the side surface of the process roller main body 110.

[0049] The flexible film layer 120 wraps the side surface of the process roller main body 110, and the surface of the flexible film layer 120 that is away from the side surface of the process roller main body 110 forms the attachment surface 11.

[0050] The flexible film layer 120 has at least one second sub-liquid outlet 114, and the second sub-liquid outlet 114 communicates with the first sub-liquid outlet 113 to form the liquid outlet 112.

[0051] By providing the flexible film layer 120, the attachment surface 11 can be elastically contacted with the first surface 201 of the product 2, facilitating better fitting of the attachment surface 11 with the first surface 201 of the product 2, thereby improving the uniformity of the solution 3 attached to the first surface 201, and further improving the uniformity of the film layer prepared on the first surface 201.

[0052] In some embodiments, the attachment surface 11 of the process roll 10 can be a matte surface, a mirror surface, or a surface with micro-pits. The process roll 10 can be a rigid roll or a flexible roll.

[0053] In some embodiments, as Figure 5 shown, the product 2 further has a second surface 202 disposed opposite to the first surface 201. The film layer preparation device 1 further includes at least one pressure roll 30. The pressure roll 30 can include a cylindrical structure, a rod-shaped structure, and other structures.

[0054] The pressure roll 30 is disposed adjacent to the process roll 10, extends along the first direction X1, and is provided with an extrusion surface 31 extending along the first direction X1. The pressure roll 30 can rotate about an axis parallel to the first direction X1.

[0055] The product 2 can be disposed between the adjacent pressure roll 30 and process roll 10. The extrusion surface 31 can be in rolling contact with the second surface 202 and apply a pressure to the product 2 towards the attachment surface 11.

[0056] Exemplarily, the pressure roll 30 and the process roll 10 are spaced apart in the vertical direction. The process roll 10 is located below the product 2, and the pressure roll 30 is located above the product 2.

[0057] By providing the pressure roll 30, the extrusion surface 31 of the pressure roll 30 applies a pressure to the product 2 towards the attachment surface 11, improving the fitting degree between the process roll 10 and the product 2, and further improving the uniformity of the film layer preparation.

[0058] In some embodiments, the film layer preparation device 1 further includes a loading assembly 40. The loading assembly 40 is configured to carry the product 2 and transport the product 2 to the process roll 10, thereby realizing automatic loading of the process roll 10 and improving the automation degree of the film layer preparation device 1.

[0059] Exemplarily, the feeding component 40 can be a belt drive component, which supports and transports the product 2 through a conveyor belt. Exemplarily, the feeding component 40 can be a combination of a chain drive component and rollers. The chain conveyor drives the rollers to rotate, and then the product 2 is supported and transported by the rollers. Exemplarily, the feeding component 40 can also be a linear module, which supports and transports the product 2 through a slider on the linear module. The specific structure of the feeding component 40 can be selected according to actual needs, and the present application does not make specific limitations.

[0060] Figure 6 The figure shows a schematic structural diagram of a film layer preparation device provided by another embodiment of the present application. Figure 7 The figure shows a schematic structural diagram of a film layer preparation device provided by another embodiment of the present application. Figure 8 The figure shows a schematic structural diagram of a film layer preparation device provided by another embodiment of the present application. Figure 9 The figure shows a schematic structural diagram of a film layer preparation device provided by another embodiment of the present application. In some embodiments, such as Figures 6 to 9 As shown, the feeding component 40 drives the product 2 to move along the third direction X2 to the process roller 10. Along the third direction X2, the vertical height of the surface of the feeding component 40 in contact with the product 2 increases, so that along the third direction X2, the vertical height of a product 2 located on the feeding component 40 gradually increases, so that the product 2 first moves above the process roller 10. As the product 2 moves along the third direction X2, the product 2 falls from above the process roller 10 to the upper surface of the process roller 10, so that the lower surface of the product 2 is directly in contact with the solution 3 on the upper surface of the process roller 10, thereby avoiding the side surface of the product 2 from being contaminated by the solution 3 on the process roller 10, and further avoiding the upper surface of the product 2 from being contaminated by the solution 3 on the process roller 10.

[0061] In some embodiments, the feeding component 40 includes a plurality of feeding rollers 41. The plurality of feeding rollers 41 are arranged in sequence along the third direction X2. The feeding roller 41 can rotate self - sufficiently, and is configured to carry the product 2 and transport the product 2 to the process roller 10 through self - rotation. Along the third direction X2, the vertical height of the geometric centers of the plurality of feeding rollers 41 increases in sequence.

[0062] Exemplarily, as Figures 6 to 9 shown, three feeding rollers 41 are shown. Along the third direction X2, the vertical height of the geometric centers of the three feeding rollers 41 increases in sequence, so that along the third direction X2, the vertical height of the product 2 located on the three feeding rollers 41 gradually increases, thereby avoiding the side surface and the upper surface of the product 2 from being contaminated by the solution 3 on the process roller 10.

[0063] In some embodiments, the loading assembly 40 further includes at least one transition roller 42. The transition roller 42 is disposed between the loading roller 41 and the process roller 10. The transition roller 42 is located above the container 20, and the solution 3 on the transition roller 42 can enter the accommodation chamber 21 through the opening 22.

[0064] In practical applications, when the product 2 is supported by both the transition roller 42 and the process roller 10, after the solution 3 adheres to the first surface 201 of the product 2, the solution 3 may flow back to the transition roller 42 along the first surface 201, and the solution 3 on the transition roller 42 can drip into the container 20, thereby recovering the solution 3 and further improving the utilization rate of the solution 3.

[0065] Exemplarily, the height of the upper surface of the transition roller 42 is greater than or equal to the height of the upper surface of the loading roller 41 adjacent to the transition roller 42.

[0066] Exemplarily, as Figures 6 to 9 shown, the loading process of the product 2 and the film layer preparation process are shown. Exemplarily, as Figure 6 shown, the product 2 is supported by three loading rollers 41, the center of gravity of the product 2 is located on the three loading rollers 41, and the front end of the product 2 in the moving direction is located above the transition roller 42. As Figure 7 shown, the product 2 is supported by two loading rollers 41 and one transition roller 42, the center of gravity of the product 2 is located on the two loading rollers 41, and the front end of the product 2 in the moving direction is located above the process roller 10. As Figure 8 shown, the product 2 is supported by two loading rollers 41, one transition roller 42 and one process roller 10, the center of gravity of the product 2 is located between the loading roller 41 and the transition roller 42, and the front end of the product 2 in the moving direction falls to the process roller 10, thereby preventing the side surface and the upper surface of the product 2 from being contaminated by the solution 3 on the transition roller 42 and the process roller 10. As Figure 9 shown, the product 2 is supported by the transition roller 42 and multiple process rollers 10, the center of gravity of the product 2 is located on the process roller 10, and the first surface 201 of the product 2 is prepared with a film layer.

[0067] In some embodiments, as Figure 4 shown, the film layer preparation device 1 further includes a blanking assembly 50. The blanking assembly 50 is configured to carry the product 2 and receive the product 2 carried by the process roller 10, thereby realizing automatic blanking of the process roller 10 and further improving the automation degree of the film layer preparation device 1.

[0068] In some embodiments, the blanking assembly 50 drives the product 2 to transport the product 2 along the third direction X2. The blanking assembly 50 includes: a plurality of blanking rollers 51. The plurality of blanking rollers 51 are arranged in sequence along the third direction X2. The blanking roller 51 can rotate self - sufficiently and is configured to carry the product 2 and transport the product 2 by self - rotation.

[0069] Figure 10 The following is a schematic structural diagram of a blanking roller provided by an embodiment of the present application. Exemplarily, as Figure 10 shown, the lower surface of the product 2 has opposite first end 203 and second end 204. The blanking roller 51 includes two bearing sections 511 and a connecting section 512. The two bearing sections 511 are respectively configured to bear the first end 203 of the product 2 and the second end 204 of the product 2. The connecting section 512 connects the two bearing sections 511, and the diameter of the connecting section 512 is smaller than the diameter of the bearing section 511, so that the product 2 is borne by the two bearing sections 511, avoiding the contact of the blanking roller 51 with the area between the first end 203 and the second end 204 of the product 2, thereby reducing the influence of the blanking roller 51 on the film layer of the first surface 201 of the product 2.

[0070] In some embodiments, the two bearing sections 511 are in line contact or point contact with the first end 203 and the second end 204 of the product 2 respectively, so as to further reduce the contact area between the bearing section 511 and the first end 203 and the second end 204 of the product 2, thereby further reducing the damage of the blanking roller 51 to the film layer of the lower surface of the product 2.

[0071] In some embodiments, along the direction from the bearing section 511 to the connecting section 512, the diameter of the bearing section 511 gradually decreases. In other words, the bearing section 511 can be a frustum of a cone, and the side surface of the frustum of the cone forms a point contact with the product 2, further reducing the contact area between the bearing section 511 and the product 2, thereby further reducing the influence of the blanking roller 51 on the film layer of the first surface 201 of the product 2.

[0072] In some embodiments, the film layer preparation device 1 further includes a drying assembly 60. The drying assembly 60 is disposed adjacent to the process roller 10 and is configured to provide heat energy to the process roller 10, so as to accelerate the speed of forming a film layer of the solution 3 on the first surface 201 of the product 2.

[0073] Exemplarily, the drying assembly 60 can be a hot air blower, and heat energy is provided to the process roller 10 by blowing hot air to the process roller 10. Exemplarily, the drying assembly 60 can be a heating wire or a heating tube, and heat energy is provided to the process roller 10 by heating the gas around the process roller 10.

[0074] In some embodiments, the film layer preparation device 1 further includes: a housing 70. The housing 70 has an accommodation space 71, an air inlet 72 and an air outlet 73 communicating with the accommodation space 71. The process roller 10 is disposed in the accommodation space 71, and the product 2 can be placed in the accommodation space 71. Impurity gas can flow out of the accommodation space 71 through the air outlet 73, and inert gas can flow into the accommodation space 71 through the air inlet 72, so that the accommodation space 71 is filled with inert gas, avoiding the reaction of the solution 3 with the impurity gas.

[0075] Exemplarily, the loading roller 41, the transition roller 42, and the unloading roller 51 may also be disposed in the accommodation space 71. Exemplarily, the drying assembly 60 may also be disposed in the accommodation space 71.

[0076] Exemplarily, the solution 3 is a perovskite solution. The perovskite solution has strong radiation and is easy to volatilize. By providing the housing 70, the volatilization of the solution 3 can be reduced, and the influence of the radiation of the solution 3 on the user can be reduced.

[0077] In some embodiments, such as Figure 4 and Figures 6 to 9 shown, the film layer preparation device 1 further includes: a support assembly 80 and at least one first driving assembly 90. The support assembly 80 is configured to support the process roller 10, and the process roller 10 is rotatably connected to the support assembly 80 about an axis parallel to the first direction X1. The first driving assembly 90 is connected to the process roller 10 and is configured to drive the process roller 10 to rotate about an axis parallel to the first direction X1.

[0078] Exemplarily, the support assembly 80 may be structures such as support columns, brackets, and support plates. The support assembly 80 may also support the loading roller 41, the transition roller 42, and the unloading roller 51. Exemplarily, the support assembly 80 and the first driving assembly 90 may also be disposed in the accommodation space 71.

[0079] The first driving assembly 90 may be a combination of a motor and a transmission structure. The transmission structure may be belt transmission, chain transmission, gear transmission, screw-nut transmission, etc., which are not specifically limited in this application. Exemplarily, the motor may be a servo motor, reducing the energy consumption of the film layer preparation device 1.

[0080] The basic principles of the present application have been described above in conjunction with specific embodiments. However, it should be noted that the advantages, advantages, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, advantages, effects, etc. are essential for each embodiment of the present application. In addition, the above-disclosed specific details are only for the purposes of illustration and easy understanding, rather than limitations, and the above details do not limit the present application to necessarily adopt the above specific details to implement.

[0081] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including," "comprising," "having," etc. are open-ended terms that mean "including but not limited to" and can be used interchangeably with each other. The word "or" and "and" used herein refer to the phrase "and / or" and can be used interchangeably with it, unless the context clearly indicates otherwise. The phrase "such as" used herein refers to the phrase "such as but not limited to" and can be used interchangeably with it.

[0082] It should also be noted that in the apparatuses, equipment, and methods of this application, each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent solutions of this application.

[0083] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects are very obvious to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

[0084] The above description has been given for purposes of illustration and description. In addition, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions, and sub-combinations thereof.

Claims

1. A film preparation device, characterized in that: include: at least one process roller extending in a first direction and provided with an attachment surface extending in the first direction, the process roller being rotatable about an axis parallel to the first direction, the attachment surface being configured to contact a first surface of the product; The adhesion surface is capable of adhering a solution, and when the process roller rotates around an axis parallel to the first direction, the adhesion surface is in rolling contact with the first surface, so that at least a portion of the solution adhered to the adhesion surface can adhere to the first surface.

2. The film preparation device according to claim 1, characterized in that: The process roller has a chamber and at least one liquid outlet connecting the chamber and the attachment surface; wherein the chamber is configured to contain the solution, and the solution can flow to the attachment surface through the liquid outlet; In the case where there are multiple liquid outlets, the multiple liquid outlets are evenly distributed on the attachment surface.

3. The film preparation device according to claim 2, characterized in that: Also includes: The solution injection assembly is communicated with the chamber and is configured to inject the solution into the chamber.

4. The film preparation device according to claim 2, characterized in that: The process roller is further configured to carry the product; The film preparation device also includes: A container, arranged below the process roller, having a containing chamber and an opening facing upward, wherein the opening is communicated with the containing chamber; The solution dripping from the process roller can enter the receiving chamber through the opening.

5. The film preparation device according to claim 2, characterized in that: The shape of the orthographic projection of the liquid outlet on the attachment surface includes one or more of the following shapes: circular, elongated, and polygonal.

6. The film preparation device according to claim 2, characterized in that: The process roller comprises: A process roller body extends along the first direction and is provided with a side surface extending along the first direction, and the process roller body can rotate around an axis parallel to the first direction, wherein the process roller body has the chamber and at least one first sub-liquid outlet connecting the chamber and the side surface of the process roller body: A flexible film layer wraps the side of the process roller body, and the surface of the flexible film layer away from the side of the process roller body forms the attachment surface, wherein the flexible film layer has at least one second sub-liquid outlet, and the second sub-liquid outlet is interconnected with the first sub-liquid outlet to form the liquid outlet.

7. The film preparation device according to claim 2, characterized in that: The product also has a second surface disposed opposite to the first surface; Wherein, the film preparation device also includes: at least one pressure roller, which is disposed adjacent to the process roller, extends along the first direction, is provided with an extrusion surface extending along the first direction, and is capable of rotating around an axis parallel to the first direction; Wherein, the product can be arranged between the adjacent pressure roller and the process roller, and when the process roller rotates around an axis parallel to the first direction, the extrusion surface rolls in contact with the second surface and applies pressure toward the adhesion surface to the product.

8. The film preparation device according to claim 2, characterized in that: There are multiple process rollers, which are arranged in sequence along the second direction. The adhesion surfaces of at least two of the process rollers bear the product together, and the second direction is perpendicular to the first direction.

9. The film preparation device according to claim 8, characterized in that: Also includes: a loading assembly configured to carry the product and transport the product to the process roller; and / or, The unloading assembly is configured to carry the product and receive the product carried by the process roller.

10. The film preparation device according to any one of claims 1 to 9, characterized in that: The film preparation device also includes: a drying assembly disposed adjacent to the process roller and configured to provide heat energy to the process roller; and / or, The film preparation device also includes: A shell having a containing space and an air inlet and an air outlet communicated with the containing space, wherein the process roller is arranged in the containing space, and the product can be placed in the containing space, wherein impurity gas can flow out of the containing space through the air outlet, and inert gas can flow into the containing space through the air inlet; and / or, The film preparation device also includes: A support assembly configured to support the process roller, wherein the process roller is rotatably connected to the support assembly around an axis parallel to the first direction; At least one first driving assembly is connected to the process roller and is configured to drive the process roller to rotate around an axis parallel to the first direction.

11. The film preparation device according to any one of claims 1 to 9, characterized in that: The solution includes a perovskite solution, and the perovskite solution is attached to the first surface to form a perovskite film layer.

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