Perovskite solar cell packaging structure

Abstract

A perovskite solar cell packaging structure disclosed by the present invention comprises a workbench, the workbench is provided with a thin film forming device, and the thin film forming device comprises a substrate, a perovskite thin film, a PI film and a pressing plate. According to the perovskite solar cell packaging structure provided by the invention, after precursor liquid is dropped on the substrate, the substrate is preheated, then the pressing plate moves downwards, the PI film is driven to press the precursor liquid to form a perovskite thin film, then the two sides of the PI film are torn up through the upward movement of the pressing plate, and then in the upward movement process of the pressing plate, the two sides of the PI film are peeled off through the peeling assembly. According to the method, the PI film is separated step by step, it is guaranteed that the perovskite film is left on the substrate during separation, separation failure caused by the fact that the PI film carries the perovskite film during stripping is avoided, preparation of the perovskite film is achieved, soft covering deposition of the perovskite film is achieved, defects caused by heat convection are eliminated through the strategy of surface tension relaxation, and the performance of the perovskite film is improved. And the preparation efficiency of the perovskite thin film is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of perovskite solar cells, and in particular to a perovskite solar cell packaging structure. Background Art

[0002] ‌Perovskite solar cells‌ are a new type of photovoltaic cell that uses perovskite materials as light absorption layers. Perovskite materials are highly efficient, low-cost, and can be mass-produced. When exposed to sunlight, the perovskite layer first absorbs photons to generate electron-hole pairs. Due to the difference in the binding energy of excitons in perovskite materials, these carriers either become free carriers or form excitons. Moreover, because these perovskite materials tend to have lower carrier recombination probabilities and higher carrier mobility, the diffusion distance and lifetime of carriers are longer.

[0003] During the preparation of perovskite solar cells, they need to be packaged. During the packaging, a perovskite film will be attached to the surface of the battery. During the preparation of the perovskite film, the perovskite ink needs to be dropped on the preheated substrate, and then covered with a PI film to press down and spread into a film. The PI film is then peeled off to form a perovskite film. Since the perovskite film is formed under the pressure of the PI film and the substrate, it is difficult to ensure that the perovskite film is not lifted up along with the PI film during the peeling process, resulting in the perovskite film being lifted up and moved from the substrate, and ultimately resulting in the substrate and the perovskite film not fitting together, affecting the subsequent packaging of the battery and reducing the packaging efficiency. Summary of the invention

[0004] The purpose of the present invention is to provide a perovskite solar cell packaging structure to solve the above-mentioned deficiencies in the prior art.

[0005] In order to achieve the above-mentioned object, the present invention provides the following technical solution: comprising a workbench, on which a thin film forming device is arranged, and the thin film forming device comprises a substrate, a perovskite film, a PI film and a pressing plate; It also includes a moving component, which presses the PI film under the pressure plate to form a thin film of the precursor liquid, and then when the pressure plate moves up, the PI film is automatically peeled off passively; The moving assembly includes a translation assembly, and the translation assembly is in active contact with a guide rod of the PI film, so that when both sides of the PI film are torn up, the PI film between the two guide rods is still in contact with the perovskite film; The moving assembly also includes a peeling assembly, which then drives the translation assemblies to approach each other through movement, so that both sides of the PI film are pulled up, and at the same time, the PI film area between the two guide rods is gradually reduced, so that the PI film is gradually peeled off.

[0006] As a further description of the above technical solution: It also includes a frame-shaped blade, which drives multiple trimming components to move when the pressure plate moves up, so that the frame-shaped blade moves to trim the edge of the perovskite film.

[0007] As a further description of the above technical solution: It also includes a separation blade, which drives the PI film to separate from the perovskite film when moving, and cleans the waste on the PI film.

[0008] As a further description of the above technical solution: The stripping assembly includes a driving rod fixed to both ends of the PI film and two bidirectional screws that drive the driving rod to move, the two ends of the driving rod are respectively fixedly connected with threaded plates, the two threaded plates located on the same side are threadedly connected to the bidirectional screw, the outside of the bidirectional screw is fixedly connected with a gear, and the workbench is fixedly connected with a rack that meshes with the gear.

[0009] As a further description of the above technical solution: The stripping assembly also includes two connecting plates, the connecting plates are connected to two bidirectional screw rods, and a driving plate that is in active contact with the connecting plates is fixedly connected to the pressing plate.

[0010] As a further description of the above technical solution: The translation assembly includes a limit plate fixed to both ends of the guide rod, the bottom end of the limit plate is fixedly connected to a fixed rod, a moving tube is slidably arranged outside the fixed rod, and the moving tube is slidably arranged in a guide groove opened on the workbench.

[0011] As a further description of the above technical solution: The translation assembly also includes a guide plate fixed on the rack, and the same limiting rod is slidably arranged in two limiting plates on one side, and a clamping rod is slidably arranged in the guide plate, and the clamping rod is slidably arranged in the limiting rod.

[0012] As a further description of the above technical solution: It also includes a film pressing assembly, which is used to press down the pressure plate. The film pressing assembly includes a hydraulic cylinder, the output end of the hydraulic cylinder is fixedly connected to a fixed plate, and a plurality of control rods are fixedly connected to the pressure plate, and each of the control rods is slidably arranged in the fixed plate.

[0013] As a further description of the above technical solution: The trimming assembly includes a fixed tube fixed to the outside of the frame-shaped blade, a sliding plate is slidably arranged in the fixed tube, a wedge plate is fixedly connected to the workbench, the wedge plate is slidably arranged in the sliding plate and the fixed tube, and an L-shaped rod adapted to the sliding plate is fixedly connected to the bottom of the fixed plate.

[0014] As a further description of the above technical solution: It also includes an unlocking component. After the translation component moves to the highest point of the guide groove, the unlocking component drives the clamping rod to move so as to unlock the limit rod. The unlocking component includes a circular plate fixed to the end of the clamping rod, and the end of the circular plate is fixedly connected to an elastic rope. The end of the elastic rope passes through the guide plate and is fixedly connected to the limit plate. A tension spring is provided on the outer sleeve of the clamping rod, and the two ends of the tension spring are respectively fixedly connected to the guide plate and the circular plate.

[0015] In the above technical solution, the perovskite solar cell packaging structure provided by the present invention has the following beneficial effects: The present invention: after dropping a precursor liquid on a substrate, the substrate is basically preheated, and then a pressing plate is moved downward to drive a PI film to press the precursor liquid to form a perovskite film, and then the two sides of the PI film are torn up by moving the pressing plate upward, and then the PI film is gradually separated by a peeling component during the upward movement of the pressing plate, so as to ensure that the perovskite film remains on the substrate during separation, and to avoid the PI film carrying the perovskite film during peeling to cause separation failure, so as to achieve the preparation of the perovskite film, thereby achieving soft covering deposition of the perovskite film, eliminating the defects caused by thermal convection through the strategy of surface tension relaxation, and improving the efficiency of perovskite film preparation.

[0016] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

[0017] This application document provides an overview of various implementations or examples of the technology described in the present disclosure, and is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 A schematic diagram of a three-dimensional structure provided by an embodiment of the present invention; Figure 2 The embodiment of the present invention provides Figure 1 An enlarged view of point A is shown; Figure 3 The embodiment of the present invention provides Figure 2 An enlarged view of point B is shown; Figure 4 A schematic diagram of the three-dimensional structure of a substrate, a perovskite film and a frame-shaped blade provided in an embodiment of the present invention; Figure 5 A schematic diagram of a partial three-dimensional structure provided by an embodiment of the present invention; Figure 6 The embodiment of the present invention provides Figure 5 An enlarged view of point C is shown; Figure 7 The embodiment of the present invention provides Figure 5 An enlarged view of D is shown; Figure 8 A schematic diagram of a partial three-dimensional structure of a fixed tube and a sliding plate provided in an embodiment of the present invention; Fig. 9 A schematic diagram of a partial three-dimensional structure of a pressing plate provided in an embodiment of the present invention; Fig.10 A schematic diagram of a partial longitudinal section structure of a workbench provided in an embodiment of the present invention; Fig.11 The embodiment of the present invention provides Fig.10 An enlarged view of E is shown.

[0020] Description of reference numerals: 1. Workbench; 2. Film forming device; 21. Substrate; 22. Perovskite film; 23. PI film; 24. Pressing plate; 31. Hydraulic cylinder; 32. Fixed plate; 33. Control rod; 41. Guide rod; 42. Limit plate; 43. Fixed rod; 44. Moving tube; 45. Guide groove; 46. Limit rod; 47. Guide plate; 48. Connecting rod; 51. Bidirectional screw; 52. Threaded plate; 53. Drive rod; 54. Gear; 55. Rack; 56. Connecting plate; 57. Drive plate; 6. Frame blade; 71. Fixed tube; 72. Sliding plate; 73. L-shaped rod; 74. Wedge plate; 8. Separation blade; 91. Elastic rope; 92. Round plate; 93. Tension spring. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0022] See also Figure 1-Figure 11 The present embodiment provides a perovskite solar cell packaging structure, comprising a workbench 1, on which a thin film forming device is provided, the thin film forming device comprising a substrate 21, a perovskite film 22, a PI film 23 and a pressing plate 24; It also includes a moving component, after the pressing plate 24 presses the PI film downward so that the precursor liquid forms a thin film, when the pressing plate 24 moves upward, the PI film 23 is automatically peeled off passively; The moving assembly includes a translation assembly, and the translation assembly is in active contact with the guide rod 41 of the PI film 23, so that when the two sides of the PI film 23 are torn up, the PI film 23 between the two guide rods 41 is still in contact with the perovskite film 22; The moving assembly also includes a peeling assembly, which then drives the translation assemblies closer to each other through movement, so that both sides of the PI film 23 are pulled up, and at the same time, the area of ​​the PI film 23 between the two guide rods 41 is gradually reduced, so that the PI film 23 is gradually peeled off.

[0023] In an embodiment further provided by the present invention, a frame-shaped blade 6 is further included, and when the pressure plate 24 moves upward, multiple trimming components are driven to move, so that the frame-shaped blade 6 moves to trim the edge of the perovskite film 22 .

[0024] In an embodiment further provided by the present invention, a separation blade 8 is further included. When the separation blade 8 moves, it drives the PI film 23 to separate from the perovskite film 22 and cleans the waste on the PI film 23 .

[0025] In the embodiment provided by the present invention, the peeling assembly includes a driving rod 53 fixed at both ends of the PI film 23 and two bidirectional screws 51 for driving the driving rod 53 to move, the two ends of the driving rod 53 are respectively fixedly connected with threaded plates 52, the two threaded plates 52 located on the same side are threadedly connected to the bidirectional screw 51, the bidirectional screw 51 is fixedly connected with a gear 54 outside, and the workbench 1 is fixedly connected with a rack 55 that meshes with the gear 54. The gear 54 rotates on the rack 55, so that the bidirectional screw 51 rotates, driving the two threaded plates 52 on the same bidirectional screw 51 to approach each other. When the two threaded plates 52 contact each other, the gear 54 moves out of the rack 55.

[0026] Furthermore, the stripping assembly also includes two connecting plates 56, which are connected to the two bidirectional screws 51. The pressure plate 24 is fixedly connected to a driving plate 57 that is in active contact with the connecting plate 56. When the pressure plate 24 moves upward, the driving plate 57 is driven to move upward synchronously until the pressure plate 24 moves above the driving rod 53. At this time, the driving plate 57 is in active contact with the connecting plate 56, and the pressure plate 24 continues to move upward, which can drive the connecting plate 56 to move synchronously, and the driving plate 57 can limit the connecting plate 56.

[0027] In the solution further provided by the present invention, the translation assembly includes a limit plate 42 fixed at both ends of the guide rod 41, the bottom end of the limit plate 42 is fixedly connected to a fixed rod 43, a moving tube 44 is slidably arranged outside the fixed rod 43, the moving tube 44 is slidably arranged in a guide groove 45 opened on the workbench 1, the guide groove 45 is arranged to be an inclined surface, and a roller is arranged at the bottom of the moving tube 44 to roll with the guide groove 45. After the moving tube 44 moves to the middle position, when the driving force is lost, the moving tube 44 is moved and reset through the roller and the inclined surface.

[0028] Specifically, the translation assembly also includes a guide plate 47 fixed on the rack 55, and the same limit rod 46 is slidably set in the two limit plates 42 located on one side. A clamping rod 48 is slidably set in the guide plate 47. The clamping rod 48 is slidably set in the limit rod 46. The limit rod 46 is clamped and limited by the clamping rod 48. When the PI film 23 is pulled upward, the limit plate 42 is ensured to move horizontally, thereby ensuring the separation of the PI film 23 and the perovskite film 22.

[0029] The present invention also includes a film pressing assembly, which is used to press down the pressing plate 24. The film pressing assembly includes a hydraulic cylinder 31. The output end of the hydraulic cylinder 31 is fixedly connected to a fixed plate 32. A plurality of control rods 33 are fixedly connected to the pressing plate 24. Each control rod 33 is slidably arranged in the fixed plate 32. The control rod 33 is convex. When the fixed plate 32 starts to move up, the pressing plate 24 does not move therewith. Only when the fixed plate 32 contacts the top of the control rod 33, the fixed plate 32 moves up to drive the pressing plate 24 to move synchronously.

[0030] In the present invention, the trimming assembly includes a fixed tube 71 fixed to the outside of the frame blade 6, a sliding plate 72 is slidably arranged in the fixed tube 71, a wedge plate 74 is fixedly connected to the workbench 1, the wedge plate 74 is slidably arranged in the sliding plate 72 and the fixed tube 71, and grooves are provided in the sliding plate 72 and the fixed tube 71, the two grooves do not correspond to each other, and the two grooves are adapted to the wedge surface of the wedge plate 74, and the bottom of the fixed plate 32 is fixedly connected to an L-shaped rod 73 adapted to the sliding plate 72, and the upper surface of the contact between the sliding plate 72 and the L-shaped rod 73 is provided with a wedge surface (such as Figure 7 As shown in the figure, a return spring is arranged between the sliding plate 72 and the fixed tube 71. When the sliding plate 72 moves into the fixed tube 71 due to the wedge plate 74, the return spring is compressed. When the sliding plate 72 moves out of the wedge surface of the wedge plate 74, the sliding plate 72 is reset by the return spring.

[0031] The present invention also includes an unlocking assembly. After the translation assembly moves to the highest point of the guide slot 45, the unlocking assembly drives the clamping rod 48 to move so as to unlock the limit rod 46. The unlocking assembly includes a circular plate 92 fixed to the end of the clamping rod 48. A protrusion is arranged outside the clamping rod 48. After the elastic rope 91 pulls the clamping rod 48 out of the limit rod 46, the protrusion will contact and limit with the guide plate 47 to ensure the stability of the clamping rod 48. The end of the circular plate 92 is fixedly connected to the elastic rope 91. The end of the elastic rope 91 The portion passes through the guide plate 47 and is fixedly connected to the limit plate 42. A tension spring 93 is provided on the outer sleeve of the clamping rod 48. The two ends of the tension spring 93 are respectively fixedly connected to the guide plate 47 and the circular plate 92. When the limit plate 42 moves to the highest point of the guide groove 45, the elastic rope 91 is in a tensioned state and pulls the clamping rod 48 out of the limit tube to unlock the limit rod 46. After the limit plate 42 loses the driving force, the pull of the elastic rope 91 assists the movement of the roller in the guide groove 45 so that the limit plate 42 can move to both ends.

[0032] During operation, the precursor liquid is dropped onto the substrate 21, and then the substrate 21 is preheated. The fixed plate 32 is driven downward by the hydraulic cylinder 31, and then the pressing plate 24 is driven to move downward synchronously, so that the PI film 23 contacts the precursor liquid, and then the fixed plate 32 contacts the pressing plate 24 and presses downward, so that the precursor liquid is pressed downward to form the perovskite film 22; After the pressing and forming, the hydraulic cylinder 31 is driven to move upward and then the fixed plate 32 is moved synchronously, so that the L-shaped rod 73 is moved synchronously, driving the sliding plate 72 to move synchronously, thereby driving the frame-shaped blade 6 to move upward through the fixed tube 71 to trim the protruding part of the edge of the perovskite film 22. When the trimming is completed, the sliding plate 72 and the fixed tube 71 move to the wedge surface of the wedge plate 74, so that the sliding plate 72 moves into the fixed tube 71, so that the sliding plate 72 moves out of the L-shaped rod 73, and the frame-shaped blade 6 is reset by gravity; The fixing plate 32 continues to move upward, driving the pressing plate 24 to move upward synchronously, driving the driving plate 57 to move upward synchronously, and when the driving plate 57 contacts the connecting plate 56, it drives the connecting plate 56 to move upward synchronously, so that the gear 54 moves upward on the surface of the rack 55, thereby driving the gear 54 to rotate and drive the bidirectional screw 51 to rotate synchronously, so that the threaded plate 52 drives the driving rod 53 to move, thereby rolling up and moving the two ends of the PI film 23; Since the length of the PI film 23 is fixed, when the two ends of the PI film 23 are rolled up and lifted, the guide rod 41 is driven to move, and under the limit of the limit rod 46 by the clamping rod 48, the limit plate 42 moves laterally on the limit rod 46, so that the two limit plates 42 on the same limit rod 46 are close to each other, and the separation blade 8 moves onto the PI film 23 and the perovskite film 22 to separate the PI film 23 from the perovskite film 22, and the PI film 23 continues to move upward for peeling; When the two limit plates 42 move to the middle position, the elastic rope 91 is in the limit state and pulls the clamping rod 48 to move out of the limit rod 46. At this time, the limit rod 46 is unlocked, and the gear 54 moves out of the rack 55. The pressure plate 24 continues to move upward so that the PI film 23 drives the guide rod 41 to move upward and out of the perovskite film 22, thereby facilitating the removal of the substrate 21. After being taken out, a new substrate 21 with precursor liquid is placed under the PI film 23, and then the fixing plate 32 is driven downward by the hydraulic cylinder 31, driving the pressing plate 24 downward, so that the gear 54 contacts the rack 55 and drives the gear 54 to reverse, so that the threaded plate 52 drives the PI film 23 to expand and reset; After the limit plate 42 loses the restriction of the PI film 23, the elastic rope 91 generates a pulling force on the limit plate 42, thereby pulling the limit plate 42 to move to both sides, and the elastic force of the tension spring 93 pushes the clamping limit of the clamping rod 48 to the limit rod 46, and cooperates with the sliding of the roller in the guide groove 45, thereby realizing the resetting of the limit plate 42, which is convenient for the next preparation of the perovskite film 22.

[0033] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A perovskite solar cell packaging structure, comprising a workbench, characterized in that: The workbench is provided with a thin film forming device, and the thin film forming device includes a substrate, a perovskite film, a PI film and a pressing plate; It also includes a moving component, which presses the PI film under the pressure plate to form a thin film of the precursor liquid, and then when the pressure plate moves up, the PI film is automatically peeled off passively; The moving assembly includes a translation assembly, and the translation assembly is in active contact with a guide rod of the PI film, so that when both sides of the PI film are torn up, the PI film between the two guide rods is still in contact with the perovskite film; The moving assembly also includes a peeling assembly, which then drives the translation assemblies to approach each other through movement, so that both sides of the PI film are pulled up, and at the same time, the PI film area between the two guide rods is gradually reduced, so that the PI film is gradually peeled off.

2. A perovskite solar cell packaging structure according to claim 1, characterized in that: It also includes a frame-shaped blade, which drives multiple trimming components to move when the pressure plate moves up, so that the frame-shaped blade moves to trim the edge of the perovskite film.

3. A perovskite solar cell packaging structure according to claim 1, characterized in that: It also includes a separation blade, which drives the PI film to separate from the perovskite film when moving, and cleans the waste on the PI film.

4. A perovskite solar cell packaging structure according to claim 1, characterized in that: The stripping assembly includes a driving rod fixed to both ends of the PI film and two bidirectional screws that drive the driving rod to move, the two ends of the driving rod are respectively fixedly connected with threaded plates, the two threaded plates located on the same side are threadedly connected to the bidirectional screw, the outside of the bidirectional screw is fixedly connected with a gear, and the workbench is fixedly connected with a rack that meshes with the gear.

5. A perovskite solar cell packaging structure according to claim 4, characterized in that: The stripping assembly also includes two connecting plates, the connecting plates are connected to two bidirectional screw rods, and a driving plate that is in active contact with the connecting plates is fixedly connected to the pressing plate.

6. A perovskite solar cell packaging structure according to claim 4, characterized in that: The translation assembly includes a limit plate fixed to both ends of the guide rod, the bottom end of the limit plate is fixedly connected to a fixed rod, a moving tube is slidably arranged outside the fixed rod, and the moving tube is slidably arranged in a guide groove opened on the workbench.

7. A perovskite solar cell packaging structure according to claim 6, characterized in that: The translation assembly also includes a guide plate fixed on the rack, and the same limiting rod is slidably arranged in two limiting plates on one side, and a clamping rod is slidably arranged in the guide plate, and the clamping rod is slidably arranged in the limiting rod.

8. A perovskite solar cell packaging structure according to claim 2, characterized in that: It also includes a film pressing assembly, which is used to press down the pressure plate. The film pressing assembly includes a hydraulic cylinder, the output end of the hydraulic cylinder is fixedly connected to a fixed plate, and a plurality of control rods are fixedly connected to the pressure plate, and each of the control rods is slidably arranged in the fixed plate.

9. A perovskite solar cell packaging structure according to claim 8, characterized in that: The trimming assembly includes a fixed tube fixed to the outside of the frame-shaped blade, a sliding plate is slidably arranged in the fixed tube, a wedge plate is fixedly connected to the workbench, the wedge plate is slidably arranged in the sliding plate and the fixed tube, and an L-shaped rod adapted to the sliding plate is fixedly connected to the bottom of the fixed plate.

10. A perovskite solar cell packaging structure according to claim 7, characterized in that: It also includes an unlocking component. After the translation component moves to the highest point of the guide groove, the unlocking component drives the clamping rod to move so as to unlock the limit rod. The unlocking component includes a circular plate fixed to the end of the clamping rod, and the end of the circular plate is fixedly connected to an elastic rope. The end of the elastic rope passes through the guide plate and is fixedly connected to the limit plate. A tension spring is provided on the outer sleeve of the clamping rod, and the two ends of the tension spring are respectively fixedly connected to the guide plate and the circular plate.

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