Coating scraper and coating equipment
By designing a coating scraper, the perovskite precursor solution is absorbed by liquid-absorbing components to absorb the overflowing perovskite precursor solution, the problem of perovskite precursor solution penetration into the back of the substrate is solved, and the performance and production efficiency of the solar cell are improved.
Patent Information
- Application Number
- CN202420460376.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-11
- Publication Date
- 2025-02-28
- Estimated Expiration
- 2034-03-11
AI Technical Summary
During the perovskite/crystalline silicon stacked solar cell manufacturing process, the perovskite precursor solution may penetrate from both sides of the substrate into the back of the substrate, causing contamination or corrosion of the functional material layer, affecting the battery performance.
A coating scraper is designed, including a scraper body, a first liquid absorbing member and a second liquid absorbing member. The scraper body has a scraper end and a liquid overflow tank. The first liquid absorbing member and the second liquid absorbing member are located on opposite sides of the liquid reservoir for adsorbing the overflowing perovskite precursor solution to prevent it from penetrate into the back of the substrate.
By using this coating scraper, the overflow and leakage of the perovskite precursor solution can be effectively reduced, and the functional material layer on the back of the substrate can be avoided from being contaminated or corroded, thereby improving battery performance and production yield.
Smart Images
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Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of photovoltaics, in particular to a coating scraper and coating equipment. Background Art
[0002] In the manufacturing process of perovskite / crystalline silicon tandem solar cells, it is necessary to coat the crystalline silicon cell with a perovskite precursor solution and then perform heat treatment to form a perovskite film. During the coating process, part of the perovskite precursor solution may penetrate into the back of the substrate from both sides of the substrate, especially since the thickness of the crystalline silicon wafer is relatively thin, and the functional material layer on the back is easily contaminated or corroded by the infiltrated solution. If the infiltrated solution is not cleaned up in time, it will have an adverse effect on the battery performance. Utility Model Content
[0003] Based on this, it is necessary to provide a coating scraper and a coating device to solve the problem of the perovskite precursor solution penetrating into the back side of the substrate during the coating process.
[0004] One of the purposes of the utility model is to provide a coating scraper, the scheme is as follows:
[0005] A coating scraper comprises a scraper body, a first liquid absorbing component and a second liquid absorbing component. The scraper body has a scraping end provided with a liquid passing groove. The first liquid absorbing component and the second liquid absorbing component are respectively connected to the scraper body and located on opposite sides of the liquid passing groove.
[0006] In one embodiment, the first liquid-absorbent component and / or the second liquid-absorbent component has a porous structure.
[0007] In one embodiment, the porosity of the porous structure is 1% to 80%.
[0008] In one embodiment, the pore size of the porous structure is 5 μm to 3000 μm.
[0009] In one embodiment, the first liquid-absorbent component and the second liquid-absorbent component are elastic components.
[0010] In one embodiment, the first liquid-absorbing component and the second liquid-absorbing component are independently at least one of a fiber felt, a sponge component, a metal organic framework component, an EVA foam component, an EPE pearl cotton component and a water-absorbing resin component.
[0011] In one embodiment, the scraper body has a first side end and a second side end, the first side end and the second side end are respectively located on opposite sides of the liquid flow groove, the first liquid absorption component is connected to the first side end and / or the scraping end, and the second liquid absorption component is connected to the second side end and / or the scraping end.
[0012] In one embodiment, the first liquid absorbing member and the second liquid absorbing member protrude from the scraping end.
[0013] In one embodiment, the scraper body is a plate-shaped structure.
[0014] In one embodiment, the depth of the liquid flow channel is 0.01 mm to 100 mm.
[0015] Another object of the utility model is to provide a coating device, the scheme is as follows:
[0016] A coating device comprises a driving component and the coating scraper described in any one of the above embodiments, wherein the driving component is connected to the scraper body to drive the coating scraper to move.
[0017] Compared with the traditional solution, the above coating blade and coating equipment have the following beneficial effects:
[0018] The above-mentioned coating scraper is provided with a liquid passing groove at the scraping end facing the coating substrate. During the coating process, the perovskite precursor solution is spread on the substrate through the liquid passing groove to reduce the overflow of the perovskite precursor solution from both sides. In addition, the scraper body is connected with a first liquid absorption component and a second liquid absorption component on opposite sides of the liquid passing groove to absorb the overflowed solution on both sides to prevent the perovskite precursor solution from seeping from both sides of the substrate to the back side during the coating process, thereby preventing the functional material layer on the back side of the substrate from being contaminated or corroded by the infiltrated solution, thereby improving the performance of the prepared battery and improving the yield of the preparation process.
[0019] The above-mentioned coating equipment has the coating scraper described in any of the above-mentioned embodiments, and thus has corresponding technical characteristics and can obtain corresponding technical effects. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] FIG1 is a schematic structural diagram of a coating scraper according to an embodiment of the present invention;
[0021] FIG. 2 is a schematic structural diagram of the coating blade shown in FIG. 1 from another viewing angle.
[0022] Description of reference numerals:
[0023] 100, coating scraper; 110, scraper body; 111, scraping end; 112, liquid passage tank; 113, first side end; 114, second side end; 120, first liquid absorption component; 130, second liquid absorption component; 200, substrate; 300, perovskite precursor solution. DETAILED DESCRIPTION
[0024] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.
[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0027] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.
[0029] The utility model provides a coating scraper which can be applied to a coating process of a perovskite precursor solution in the production of a perovskite solar cell.
[0030] Referring to FIG. 1 and FIG. 2 , a coating blade 100 according to an embodiment includes a blade body 110 , a first liquid absorbing member 120 and a second liquid absorbing member 130 .
[0031] The scraper body 110 has a scraping end 111 for facing the coating substrate 200. The scraping end 111 is provided with a liquid passing groove 112, and the first liquid absorbing component 120 and the second liquid absorbing component 130 are respectively connected to the scraper body 110 and located at opposite sides of the liquid passing groove 112.
[0032] The coating scraper 100 is provided with a liquid passing groove 112 at the scraping end 111 facing the coating substrate 200. During the coating process, the perovskite precursor solution 300 is spread on the substrate 200 through the liquid passing groove 112, reducing the overflow of the perovskite precursor solution 300 from both sides. In addition, the scraper body 110 is connected with a first liquid absorption component 120 and a second liquid absorption component 130 on opposite sides of the liquid passing groove 112 to absorb the overflowed solution on both sides to prevent the perovskite precursor solution 300 from seeping from both sides of the substrate 200 to the back side during the coating process, thereby preventing the functional material layer on the back side of the substrate 200 from being contaminated or corroded by the infiltrated solution, thereby improving the performance of the prepared battery and improving the yield of the preparation process.
[0033] In the production of perovskite solar cells, the coating blade 100 is used to form a perovskite absorption layer, which can prevent the perovskite precursor solution from penetrating into the back side of the substrate 200. Therefore, the production step of cleaning the edge and back side of the cell can be omitted, which is beneficial to improving production efficiency.
[0034] In one example, the scraper body 110 is a plate-shaped structure. Further, the scraper body 110 is a substantially square plate-shaped structure.
[0035] In one example, the liquid passage groove 112 is a strip-shaped groove.
[0036] Optionally, the length of the liquid passage 112 can be set according to the thickness of the coating to be coated on the substrate 200. The length of the liquid passage 112 determines the thickness of the coating.
[0037] In one example, the depth of the liquid groove 112 is 0.01 mm to 100 mm. Further, in one example, the depth of the liquid groove 112 is 0.1 mm to 50 mm. In some specific examples, the depth of the liquid groove 112 is 0.5 mm, 1 mm, 3 mm, 5 mm, 8 mm, 10 mm, 20 mm, 30 mm, 40 mm, 50 mm, 60 mm, etc.
[0038] As shown in FIG. 1 , the scraper body 110 further has a first side end 113 and a second side end 114 . The first side end 113 and the second side end 114 are respectively located at two opposite sides of the liquid passage trough 112 .
[0039] The first liquid absorbing member 120 is connected to the first side end 113 and / or the scraping end 111. In other words, the first liquid absorbing member 120 may be connected to the first side end 113, the scraping end 111, or both.
[0040] The second liquid absorbing member 130 is connected to the second side end 114 and / or the scraping end 111. In other words, the second liquid absorbing member 130 may be connected to the second side end 114, the scraping end 111, or both.
[0041] In one example, the first liquid absorbing member 120 and the second liquid absorbing member 130 protrude from the scraping end 111. During the coating process, the first liquid absorbing member 120 and the second liquid absorbing member 130 are respectively located on both sides of the substrate 200 to clean the solution overflowing from both sides of the substrate 200.
[0042] In other examples, the first liquid absorbing member 120 and the second liquid absorbing member 130 may also be flush with the scraping end 111 .
[0043] In one example, the first liquid absorbing member 120 has a porous structure. In this example, the first liquid absorbing member 120 can be made of a porous material, or a porous structure can be formed by a processing technique, and the porous structure can absorb the coated solution through capillary action and osmotic action.
[0044] In one example, the pore size of the porous structure of the first liquid absorbent component 120 is 5 μm to 3000 μm. Further, in one example, the pore size of the porous structure of the first liquid absorbent component 120 is 20 μm to 1000 μm. In some specific examples, the pore size of the porous structure of the first liquid absorbent component 120 is 10 μm, 20 μm, 50 μm, 100 μm, 300 μm, 500 μm, 1000 μm, 2000 μm, etc.
[0045] In one example, the porosity of the porous structure of the first absorbent member 120 is 1% to 80%. Further, in one example, the porosity of the porous structure of the first absorbent member 120 is 20% to 70%. Further, in one example, the porosity of the porous structure of the first absorbent member 120 is 30% to 60%. In some specific examples, the porosity of the porous structure of the first absorbent member 120 is 10%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, etc.
[0046] In one example, the first liquid absorbing member 120 is an elastic member. In this example, the first liquid absorbing member 120 has a certain elasticity, and can produce a certain elastic deformation when the first liquid absorbing member 120 contacts the substrate 200 during the coating process, so as to prevent the first liquid absorbing member 120 from scratching the substrate 200.
[0047] In one example, the first liquid-absorbing component 120 is at least one of a fiber felt, a sponge component, a metal organic framework (MOF) component, an EVA foam component, an EPE pearl cotton component, and a water-absorbing resin component. The water-absorbing resin component may be, but is not limited to, a polyacrylamide component.
[0048] In one example, the second liquid absorbing member 130 has a porous structure. In this example, the second liquid absorbing member 130 can be made of a porous material, or a porous structure can be formed by a processing technique, and the porous structure can absorb the coated solution through capillary action and osmotic action.
[0049] In one example, the pore size of the porous structure of the second liquid absorbent component 130 is 5 μm to 3000 μm. Further, in one example, the pore size of the porous structure of the second liquid absorbent component 130 is 20 μm to 1000 μm. In some specific examples, the pore size of the porous structure of the second liquid absorbent component 130 is 10 μm, 20 μm, 50 μm, 100 μm, 300 μm, 500 μm, 1000 μm, 2000 μm, etc.
[0050] In one example, the porosity of the porous structure of the second absorbent member 130 is 1% to 80%. Further, in one example, the porosity of the porous structure of the second absorbent member 130 is 20% to 70%. Further, in one example, the porosity of the porous structure of the second absorbent member 130 is 30% to 60%. In some specific examples, the porosity of the porous structure of the second absorbent member 130 is 10%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, etc.
[0051] In one example, the second liquid absorbing member 130 is an elastic member. In this example, the second liquid absorbing member 130 has a certain elasticity, and can produce a certain elastic deformation when the second liquid absorbing member 130 contacts the substrate 200 during the coating process, so as to prevent the second liquid absorbing member 130 from scratching the substrate 200.
[0052] In one example, the second liquid-absorbing component 130 is at least one of a fiber felt, a sponge component, a metal organic framework (MOF) component, an EVA foam component, an EPE pearl cotton component, and a water-absorbing resin component. The water-absorbing resin component may be, but is not limited to, a polyacrylamide component.
[0053] Optionally, the materials of the first liquid absorbent member 120 and the second liquid absorbent member 130 may be the same or different.
[0054] Optionally, the distance between the first absorbent member 120 and the second absorbent member 130 can be set according to the width of the substrate 200 to be coated. Preferably, the distance between the first absorbent member 120 and the second absorbent member 130 is greater than or equal to the width of the substrate 200 to be coated.
[0055] In one example, the distance between the first absorbent member 120 and the second absorbent member 130 is the same as the length of the liquid channel 112 .
[0056] In one example, the distance between the first absorbent member 120 and the second absorbent member 130 is greater than the length of the liquid slot 112. For example, the distance between the first absorbent member 120 and the second absorbent member 130 is 1 mm to 30 mm greater than the length of the liquid slot 112. In some specific examples, the distance between the first absorbent member 120 and the second absorbent member 130 is 2 mm, 5 mm, 8 mm, 10 mm, 15 mm, 20 mm, 25 mm, 30 mm, etc. greater than the length of the liquid slot 112.
[0057] In one example, the distance between the first absorbent member 120 and the second absorbent member 130 is 10 cm to 100 cm. In some specific examples, the distance between the first absorbent member 120 and the second absorbent member 130 is 10 cm, 20 cm, 30 cm, 40 cm, 50 cm, 60 cm, 70 cm, 80 cm, 90 cm, 100 cm, etc.
[0058] Furthermore, the utility model also provides a coating device.
[0059] The coating device of one embodiment includes a driving component and any one of the above-mentioned coating blades 100. The driving component is connected to the blade body 110 to drive the coating blade 100 to move.
[0060] The coating device has the coating scraper 100, and the coating scraper 100 is provided with a liquid groove 112 at the scraping end 111 facing the coating substrate 200. During the coating process, the perovskite precursor solution 300 is spread on the substrate 200 through the liquid groove 112, reducing the overflow of the perovskite precursor solution 300 from both sides, and the scraper body 110 is connected to the first liquid absorption component 120 and the second liquid absorption component 130 on the opposite sides of the liquid groove 112 to absorb the overflowed solution on both sides, preventing the perovskite precursor solution 300 from seeping from both sides of the substrate 200 to the back side during the coating process, and preventing the functional material layer on the back side of the substrate 200 from being contaminated or corroded by the infiltrated solution, thereby improving the performance of the prepared battery and improving the yield of the preparation process.
[0061] In the production of perovskite solar cells, the above-mentioned coating equipment is used to form a perovskite absorption layer, which can prevent the perovskite precursor solution from penetrating into the back of the substrate 200. Therefore, the production step of cleaning the edge and back of the cell can be omitted, which is conducive to improving production efficiency.
[0062] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0063] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.
Claims
1. A coating blade, characterized in that: The invention comprises a scraper body, a first liquid absorbing component and a second liquid absorbing component. The scraper body has a scraping end, and the scraping end is provided with a liquid passing groove. The first liquid absorbing component and the second liquid absorbing component are respectively connected to the scraper body and are located at opposite sides of the liquid passing groove.
2. The coating blade according to claim 1, characterized in that: The first liquid-absorbent member and / or the second liquid-absorbent member has a porous structure.
3. The coating blade according to claim 2, characterized in that: The porosity of the porous structure is 1% to 80%; and / or The pore size of the porous structure is 5 μm to 3000 μm.
4. The coating blade according to claim 1, characterized in that: The first liquid-absorbent member and the second liquid-absorbent member are elastic members.
5. The coating blade according to claim 1, characterized in that: The first liquid-absorbing component and the second liquid-absorbing component are independently at least one of a fiber felt, a sponge component, a metal organic framework component, an EVA foam component, an EPE pearl cotton component and a water-absorbing resin component.
6. The coating blade according to any one of claims 1 to 5, characterized in that The scraper body has a first side end and a second side end, the first side end and the second side end are respectively located on opposite sides of the liquid flow groove, the first liquid absorption component is connected to the first side end and / or the scraping end, and the second liquid absorption component is connected to the second side end and / or the scraping end.
7. The coating blade according to any one of claims 1 to 5, characterized in that The first liquid absorbing member and the second liquid absorbing member protrude from the scraping end.
8. The coating blade according to any one of claims 1 to 5, characterized in that The scraper body is a plate-shaped structure.
9. The coating blade according to any one of claims 1 to 5, characterized in that The depth of the liquid passage tank is 0.01 mm to 100 mm.
10. A coating device, characterized in that: It comprises a driving component and the coating scraper according to any one of claims 1 to 9, wherein the driving component is connected to the scraper body to drive the coating scraper to move.