Feeding assembly and film layer preparation device

Abstract

The utility model relates to the technical field of semiconductors and photovoltaic cells, in particular to a feeding assembly and a film layer preparation device, and solves the problem that the side surface of a product is easily polluted by a perovskite solution on a film layer preparation assembly. The feeding assembly comprises a transmission assembly and a driving assembly. The transmission assembly is configured to carry a product. The driving assembly is connected with the transmission assembly and is configured to drive the transmission assembly to move so that the transmission assembly can convey the product to the upper surface of the process roller in the first direction. In the first direction, the vertical height of the surface, making contact with the product, of the transmission assembly is increased, so that the vertical height of the product borne by the transmission assembly in the first direction is gradually increased, the product firstly moves to the position above the process roller, and the product falls to the upper surface of the process roller from the position above the process roller along with movement of the product in the first direction; and the lower surface of the product is directly contacted with the solution on the upper surface of the process roller, so that the side surface of the product is prevented from being polluted by the solution on the process roller.

Description

Technical Field

[0001] This application relates to the technical fields of semiconductors and photovoltaic cells, and particularly to a loading component and 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. To prepare a perovskite solar cell, a perovskite film layer needs to be prepared on a silicon wafer. Currently, methods for preparing the perovskite film layer include evaporation coating, blade coating, slot coating, screen printing, spraying, inkjet printing, and other methods.

[0003] For the method of preparing the perovskite film layer using a perovskite solution, when transporting the product to the film layer preparation component, the side of the product is easily contaminated by the perovskite solution on the film layer preparation component. Summary of the Utility Model

[0004] In view of this, an embodiment of this application provides a loading component and a film layer preparation device to solve the problem that the side of the product is easily contaminated by the perovskite solution on the film layer preparation component.

[0005] In a first aspect, an embodiment of this application provides a loading component configured to provide a product for a process roller, with a solution attached to the upper surface of the process roller, and the solution can be attached to the lower surface of the product through the rolling of the process roller; wherein, the loading component includes: a transmission component configured to carry the product; a driving component connected to the transmission component and configured to drive the transmission component to move, so that the transmission component transports the product to the upper surface of the process roller along a first direction; wherein, along the first direction, the vertical height of the surface of the transmission component in contact with the product increases, so that along the first direction, the vertical height of one product carried by the transmission component gradually increases.

[0006] In combination with the first aspect, in some implementation manners of the first aspect, the transmission component includes: a plurality of loading rollers arranged in sequence along the first direction, connected to the driving component, rotating self - driven under the drive of the driving component, configured to carry the product, and transport the product to the process roller through self - rotation; wherein, along the first direction, the vertical heights of the geometric centers of the plurality of loading rollers increase in sequence.

[0007] In combination with the first aspect, in some implementation manners of the first aspect, a container is provided below the process roller, the container is provided with a receiving chamber and an opening facing upward, and the opening is communicated with the receiving chamber; the loading component further includes: at least one transition roller arranged between the loading roller and the process roller; wherein, the transition roller is located above the container, and the solution on the transition roller can enter the receiving chamber through the opening.

[0008] In combination with the first aspect, in certain implementations of the first aspect, the product has opposite first and second ends, and the loading roller includes: two bearing sections respectively configured to bear the first end and the second end of the product; a connecting section connecting the two bearing sections, and the diameter of the connecting section is smaller than the diameter of the bearing section.

[0009] In combination with the first aspect, in certain implementations of the first aspect, the two bearing sections are in line contact or point contact with the first end and the second end of the product respectively.

[0010] In combination with the first aspect, in certain implementations of the first aspect, the driving assembly includes: a servo motor connected to the transmission assembly and configured to drive the transmission assembly to move so that the transmission assembly transports the product to the upper surface of the process roller along the first direction.

[0011] In combination 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 lower surface of the product.

[0012] In a second aspect, an embodiment of the present application provides a film layer preparation device, including: a process roller with a solution attached to the upper surface thereof, and the solution can be attached to the lower surface of the product through the rolling of the process roller; the loading assembly mentioned in the first aspect configured to provide the product for the process roller.

[0013] In combination with the second aspect, in certain implementations of the second aspect, the film layer preparation device further includes: a drying assembly disposed adjacent to the process roller and configured to provide heat energy to the process roller.

[0014] In combination with the second aspect, in certain implementations of the second aspect, 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 roller and the loading assembly are both disposed in the accommodation space, and the product can be placed in the accommodation space; wherein, impurity gases can flow out of the accommodation space through the air outlet, and inert gases can flow into the accommodation space through the air inlet.

[0015] By increasing the vertical height of the surface of the driving component in contact with the product along the first direction, the vertical height of a product carried by the driving component along the first direction is gradually increased, so that the product first moves above the process roller. As the product moves along the first direction, the product falls from above the process roller to the upper surface of the process roller, making the lower surface of the product directly contact the solution on the upper surface of the process roller, thereby avoiding the side of the product being contaminated by the solution on the process roller, and further avoiding the solution flowing from the side of the product to the upper surface of the product, thus also avoiding the upper surface of the product being contaminated by the solution on the process roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] By describing the embodiments of the present application in more detail in conjunction with the accompanying 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. Together with the embodiments of the present application, they are used to explain 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.

[0017] Figure 1 The figure shows a schematic diagram of the application scenario of the loading component provided by an embodiment of the present application.

[0018] Figure 2 The figure shows a schematic diagram of the application scenario of the loading component provided by another embodiment of the present application.

[0019] Figure 3 The figure shows a schematic diagram of the application scenario of the loading component provided by another embodiment of the present application.

[0020] Figure 4 The figure shows a schematic diagram of the application scenario of the loading component provided by another embodiment of the present application.

[0021] Figure 5 The figure shows a schematic diagram of the structure of the loading roller provided by an embodiment of the present application.

[0022] Figure 6 The figure shows a schematic diagram of the structure of the film layer preparation device provided by an embodiment of the present application.

[0023] Reference Numerals:

[0024] 1. Film layer preparation device; 10. Process roller; 11. Attachment surface; 20. Container; 21. Accommodation chamber; 22. Opening; 40. Loading assembly; 410. Transmission assembly; 41. Loading roller; 411. Loading section; 412. Connection section; 42. Transition roller; 420. Driving assembly; 421. Servo motor; 50. Unloading assembly; 51. Unloading roller; 60. Drying assembly; 70. Housing; 71. Accommodation space; 72. Air inlet; 73. Air outlet; 80. Support assembly; 90. Process roller driving assembly; 2. Product; 201. First surface; 203. First end; 204. Second end; 3. Solution; X. First direction. Detailed implementation manners

[0025] 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.

[0026] Figure 1 The figure shows a schematic diagram of the application scenario of the loading assembly provided by an embodiment of the present application. Figure 2 The figure shows a schematic diagram of the application scenario of the loading assembly provided by another embodiment of the present application. Figure 3 The figure shows a schematic diagram of the application scenario of the loading assembly provided by another embodiment of the present application. Figure 4 The figure shows a schematic diagram of the application scenario of the loading assembly provided by another embodiment of the present application. As Figures 1 to 4 shown, the loading assembly 40 is configured to provide the product 2 for the process roller 10. The upper surface of the process roller 10 is attached with the solution 3, and the solution 3 can be attached to the lower surface of the product 2 through the rolling of the process roller 10, so as to form a film layer on the lower surface of the product 2.

[0027] Exemplarily, the process roller 10 may include a cylindrical structure, a rod-shaped structure, etc. The process roller 10 is provided with an attachment surface 11. 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 the axis of the cylindrical structure, and the attachment surface 11 is configured to carry the product 2 and contact the lower surface of the product 2. The lower surface of the product 2 includes a first surface 201.

[0028] Exemplarily, the product 2 may be a substrate for preparing a perovskite battery. Exemplarily, the product 2 may be a sheet-like structure, such as a silicon wafer, a glass substrate, a wafer, etc. Exemplarily, the size of the product 2 may be 210mm x 210 mm. The product 2 may also be a block structure or a strip structure, which is not specifically limited in this application. In some embodiments, the solution 3 may be a perovskite solution, and a perovskite film layer is formed after the perovskite solution is attached to the first surface 201. 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 the product 2 and improve the uniformity of the prepared film layer.

[0029] The loading assembly 40 includes: a transmission assembly 410 and a driving assembly 420.

[0030] The transmission assembly 410 is configured to carry the product 2. The driving assembly 420 is connected to the transmission assembly 410 and is configured to drive the transmission assembly 410 to move, so that the transmission assembly 410 transports the product 2 to the upper surface of the process roller 10 along the first direction X. Along the first direction X, the vertical height of the surface of the transmission assembly 410 in contact with the product 2 increases, so that along the first direction X, the vertical height of one product 2 carried by the transmission assembly 410 gradually increases, so that the product 2 first moves above the process roller 10. As the product 2 moves along the first direction X, 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 on the upper surface of the process roller 10, thereby avoiding the side surface of the product 2 being contaminated by the solution on the process roller 10, and further avoiding the solution flowing from the side surface of the product 2 to the upper surface of the product 2, and thus also avoiding the upper surface of the product 2 being contaminated by the solution on the process roller 10.

[0031] Exemplarily, the transmission assembly 410 may be a belt drive, a chain drive, a gear drive, a screw-nut drive, etc., which is not specifically limited in this application.

[0032] Exemplarily, the transmission assembly 410 includes a support member, a plurality of transmission wheels and a transmission belt. The plurality of transmission wheels are rotatably connected to the support member, and the transmission belt is sleeved on the plurality of transmission wheels. The driving assembly 420 may be a structure such as a motor or a rotary electric cylinder, and is configured to provide a rotational force. Under the drive of the driving assembly 420, the transmission wheels rotate, so as to drive the transmission belt to move, and the product 2 is transported to the process roller 10 by the movement of the transmission belt. Along the first direction X, the vertical height of the surfaces of the plurality of transmission wheels in contact with the product 2 increases.

[0033] Exemplarily, the transmission assembly 410 includes a screw rod and a nut. The extending direction of the screw rod intersects with the first direction X, and the vertical height of the first end of the screw rod in the first direction X is less than the vertical height of the second end of the screw rod in the first direction X. The first end of the screw rod is connected to the driving assembly 420, and the second end of the screw rod is close to the process roller 10. As the screw rod rotates, the nut moves along the extending direction of the screw rod, and the nut carries the product 2 to move, so that along the first direction X, the vertical height of a product 2 carried by the nut gradually increases.

[0034] Exemplarily, the driving assembly 420 can be a driving structure such as a motor, a rotary electric cylinder, etc. that can provide a rotational force, and the present application does not make specific limitations. The number of motors and rotary electric cylinders included in the driving assembly 420 can be selected according to actual needs, and the present application does not make specific limitations.

[0035] In some embodiments, the transmission assembly 410 includes a plurality of loading rollers 41. The plurality of loading rollers 41 are arranged in sequence along the first direction X, are connected to the driving assembly 420, and rotate self-driven under the drive of the driving assembly 420. The loading roller 41 is configured to carry the product 2 and transport the product 2 to the process roller 10 through self-rotation. Along the first direction X, the vertical heights of the geometric centers of the plurality of loading rollers 41 increase in sequence.

[0036] Exemplarily, the driving assembly 420 can include a plurality of driving sources, and each driving source drives a loading roller 41 to rotate self-driven. The driving source can be a motor, a rotary electric cylinder, etc. Exemplarily, the driving assembly 420 can include one driving source, and the transmission assembly 410 can further include a plurality of belt transmission structures. The plurality of belt transmission structures are in transmission connection with each other, and each belt transmission structure is connected to a loading roller 41. The driving source drives one belt transmission structure to move, and through the transmission connection between the plurality of belt transmission structures, the driving of the plurality of loading rollers 41 to rotate self-driven is realized.

[0037] In some embodiments, the driving assembly 420 includes a servo motor 421. The servo motor 421 is connected to the transmission assembly 410 and is configured to drive the transmission assembly 410 to move, so that the transmission assembly 410 transports the product 2 to the upper surface of the process roller 10 along the first direction X. The servo motor 421 has low energy consumption and high driving accuracy, reduces the energy consumption of the loading assembly 40, and improves the accuracy of the loading assembly 40.

[0038] Exemplarily, as Figures 1 to 4 shown, three loading rollers 41 are shown. Along the first direction X, the vertical heights of the geometric centers of the three loading rollers 41 increase in sequence, so that along the first direction X, the vertical height of the product 2 located on the three loading rollers 41 gradually increases, thereby preventing the side surface and the upper surface of the product 2 from being contaminated by the solution 3 on the process roller 10.

[0039] In some embodiments, a container 20 is provided below the process roller 10. The container 20 is provided with a receiving chamber 21 and an opening 22 facing upward. The opening 22 communicates with the receiving chamber 21. The feeding assembly 40 further includes at least one transition roller 42. The transition roller 42 is disposed between the feeding 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 receiving chamber 21 through the opening 22.

[0040] Exemplarily, the lower surface of the product 2 may include a first surface 201. In practical applications, when the product 2 is supported by both the transition roller 42 and the process roller 10, after the first surface 201 of the product 2 adheres to the solution 3, the solution 3 may flow back to the transition roller 42 along the first surface 201. 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.

[0041] 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 feeding roller 41 adjacent to the transition roller 42.

[0042] Exemplarily, as Figures 1 to 4 shown, the feeding process of the product 2 and the film layer preparation process are shown. Exemplarily, as Figure 1 shown, the product 2 is supported by three feeding rollers 41. The center of gravity of the product 2 is located on the three feeding rollers 41, and the front end of the product 2 in the moving direction is located above the transition roller 42. As Figure 2 shown, the product 2 is supported by two feeding rollers 41 and one transition roller 42. The center of gravity of the product 2 is located on the two feeding rollers 41, and the front end of the product 2 in the moving direction is located above the process roller 10. As Figure 3 shown, the product 2 is supported by two feeding rollers 41, one transition roller 42 and one process roller 10. The center of gravity of the product 2 is located between the feeding roller 41 and the transition roller 42, and the front end of the product 2 in the moving direction drops 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 4 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.

[0043] Figure 5 Shown is a schematic structural diagram of a feeding roller provided by an embodiment of the present application. In some embodiments, as Figure 5As shown, the product 2 has opposite first end 203 and second end 204. The loading roller 41 includes two bearing sections 411 and a connecting section 412. The two bearing sections 411 are respectively configured to bear the first end 203 and the second end 204 of the product 2. The connecting section 412 connects the two bearing sections 411, and the diameter of the connecting section 412 is smaller than that of the bearing sections 411. Thus, by bearing the product 2 with the two bearing sections 411, contact with the area between the first end 203 and the second end 204 of the product 2 by the loading roller 41 is avoided, thereby reducing the influence of the loading roller 41 on the first surface 201 of the product 2.

[0044] In some embodiments, the two bearing sections 411 are in line contact or point contact with the first end 203 and the second end 204 of the product 2 respectively, thereby further reducing the contact area between the bearing sections 411 and the first end 203 and the second end 204 of the product 2, and thus further reducing the influence of the loading roller 41 on the first surface 201 of the product 2.

[0045] In some embodiments, along the direction from the bearing section 411 to the connecting section 412, the diameter of the bearing section 411 gradually decreases. In other words, the bearing section 411 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 411 and the product 2, and thus further reducing the influence of the loading roller 41 on the first surface 201 of the product 2.

[0046] Figure 6 The figure shows a schematic structural diagram of a film layer preparation device provided by an embodiment of the present application. As Figure 6 shown, the film layer preparation device 1 includes a process roller 10 and a loading assembly 40.

[0047] A solution 3 is attached to the upper surface of the process roller 10, and the solution 3 can be attached to the lower surface of the product 2 through the rolling of the process roller 10. The loading assembly 40 is configured to provide the product 2 for the process roller 10.

[0048] Since the film layer preparation device 1 includes the loading assembly 40, therefore, the film layer preparation device 1 has all the technical features and technical effects of the loading assembly 40, which will not be elaborated here.

[0049] In some embodiments, as Figure 6 shown, the film layer preparation device 1 further includes a discharging assembly 50. The discharging assembly 50 is configured to bear the product 2 and receive the product 2 borne by the process roller 10, thereby realizing automatic discharging of the process roller 10 and further improving the automation degree of the film layer preparation device 1.

[0050] In some embodiments, the blanking assembly 50 drives the product 2 to transport the product 2 in the first direction X. The blanking assembly 50 includes: a plurality of blanking rollers 51. The plurality of blanking rollers 51 are arranged in sequence in the first direction X. The blanking roller 51 can rotate self - sufficiently, and is configured to carry the product 2 and transport the product 2 through self - rotation.

[0051] In some embodiments, the film layer preparation device 1 further includes a drying assembly 60. The drying assembly 60 is arranged 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 from the solution 3 on the first surface 201 of the product 2.

[0052] Exemplarily, the drying assembly 60 can be a hot air blower, which provides heat energy 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, which provides heat energy to the process roller 10 by heating the gas around the process roller 10.

[0053] 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 and the feeding assembly 40 are both arranged in the accommodation space 71, and the product 2 can be placed in the accommodation space 71. The impurity gas can flow out of the accommodation space 71 from the air outlet 73, and the inert gas can flow into the accommodation space 71 from the air inlet 72, so that the accommodation space 71 is filled with the inert gas, avoiding the reaction of the solution 3 with the impurity gas.

[0054] Exemplarily, the transition roller 42 and the blanking roller 51 can also be arranged in the accommodation space 71. Exemplarily, the drying assembly 60 can also be arranged in the accommodation space 71. Exemplarily, the solution 3 is a perovskite solution. The perovskite solution has strong radioactivity 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.

[0055] In some embodiments, as Figures 1 to 4 shown, the film layer preparation device 1 further includes: a support assembly 80 and at least one process roller 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. The process roller driving assembly 90 is connected to the process roller 10 and is configured to drive the process roller 10 to rotate self - sufficiently.

[0056] Exemplarily, the support assembly 80 can be structures such as support columns, brackets, support plates, etc. The support assembly 80 can also support the feeding roller 41, the transition roller 42 and the blanking roller 51. Exemplarily, the support assembly 80 and the process roller driving assembly 90 can also be arranged in the accommodation space 71.

[0057] The process roll drive assembly 90 can be a combination of a motor and a transmission structure. The transmission structure can be a belt drive, a chain drive, a gear drive, a screw-nut drive, etc., and the present application does not make specific limitations. Exemplarily, the motor can be a servo motor, which reduces the energy consumption of the film layer preparation device 1.

[0058] The basic principles of the present application have been described above in conjunction with specific embodiments. However, it should be noted that the advantages, benefits, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, benefits, effects, etc. are essential for each embodiment of the present application. In addition, the above-disclosed specific details are only for the purpose 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.

[0059] The block diagrams of the devices, apparatuses, equipment, and systems involved in the present application are only illustrative examples and do not intend 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 words, meaning "including but not limited to", and can be used interchangeably with each other. The word "or" and "and" used herein refer to the word "and / or", and can be used interchangeably with each other, unless the context clearly indicates otherwise. The word "such as" used herein refers to the phrase "such as but not limited to", and can be used interchangeably with each other.

[0060] It should also be noted that in the devices, equipment, and methods of the present application, each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent solutions of the present application.

[0061] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present 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 the present application. Therefore, the present 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.

[0062] The above description has been given for purposes of illustration and description. In addition, this description does not intend to limit the embodiments of the present 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 feeding assembly, characterized in that: The process roller is configured to provide a product to the process roller, wherein a solution is attached to the upper surface of the process roller, and the solution can be attached to the lower surface of the product by rolling the process roller; Wherein, the feeding assembly comprises: a transmission assembly configured to carry the product; a drive assembly connected to the transmission assembly and configured to drive the transmission assembly to move so that the transmission assembly transports the product to the upper surface of the process roller along a first direction; Wherein, along the first direction, the vertical height of the surface of the transmission assembly in contact with the product increases, so that along the first direction, the vertical height of a product carried by the transmission assembly gradually increases.

2. The feeding assembly according to claim 1, characterized in that: The transmission assembly comprises: A plurality of feeding rollers are arranged in sequence along the first direction, connected to the driving assembly, rotated under the drive of the driving assembly, configured to carry the product, and transport the product to the process roller by rotating; Wherein, along the first direction, the vertical heights of the geometric centers of the plurality of feeding rollers increase sequentially.

3. The feeding assembly according to claim 2, characterized in that: A container is provided below the process roller, the container is provided with a containing chamber and an opening facing upward, the opening is communicated with the containing chamber; The feeding assembly also includes: At least one transition roller, disposed between the feeding roller and the process roller; Wherein, the transition roller is located above the container, and the solution on the transition roller can enter the containing chamber through the opening.

4. The feeding assembly according to claim 2, characterized in that: The product has a first end and a second end opposite to each other, and the loading roller comprises: two bearing sections, respectively configured to bear a first end of the product and a second end of the product; A connecting section connects the two bearing sections, and a diameter of the connecting section is smaller than a diameter of the bearing section.

5. The feeding assembly according to claim 4, characterized in that: The two bearing sections are in line contact or point contact with the first end of the product and the second end of the product respectively.

6. The feeding assembly according to any one of claims 1 to 5, characterized in that: The drive assembly comprises: The servo motor is connected to the transmission assembly and is configured to drive the transmission assembly to move so that the transmission assembly transports the product to the upper surface of the process roller along the first direction.

7. The feeding assembly according to any one of claims 1 to 5, characterized in that: The solution includes a perovskite solution, and the perovskite solution is attached to the lower surface of the product to form a perovskite film layer.

8. A film preparation device, characterized in that: include: A process roller, wherein a solution is attached to the upper surface of the process roller, and the solution can be attached to the lower surface of the product by rolling the process roller; The loading assembly according to any one of claims 1 to 7 is configured to provide the product to the process roller.

9. The film preparation device according to claim 8, characterized in that: Also includes: A drying assembly is disposed adjacent to the process roller and is configured to provide heat energy to the process roller.

10. The film preparation device according to claim 8, characterized in that: 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 and the feeding assembly are both arranged in the containing space, and the product can be placed in the containing space; The impurity gas can flow out of the accommodation space through the gas outlet, and the inert gas can flow into the accommodation space through the gas inlet.

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