An automatic drop-like perovskite thin film doctor blade coating device

Abstract

The present application relates to the technical field of perovskite solar cell preparation, and particularly relates to an automatic drop-like perovskite film scraping coating device, comprising a base, a hanging mechanism, a scraper body and a drop-like mechanism; the drop-like mechanism is fixed on both sides of the scraper body through the hanging mechanism; the drop-like mechanism comprises at least three drop-like heads, and the three drop-like heads are arranged along the relative horizontal displacement of the scraper body; the distribution length of the drop-like head is adapted to the width of the base; the drop-like head is used for automatically and quantitatively conveying perovskite precursor solution to the base, the hanging mechanism comprises an adjusting crossbar and a hanging frame; the hanging frame is arranged in the shape of n; the adjusting crossbar is fixed on the top of the scraper body; the hanging frame is hung on the top of the adjusting crossbar, the present application eliminates the uncertainty of manual operation through automatic drop, and has the advantages of simple structure, high scraping coating efficiency, and effective improvement of perovskite film yield without repeated debugging.

Description

Technical Field

[0001] This invention relates to the technical field of perovskite solar cell fabrication, and more particularly to an automated perovskite thin film coating device. Background Technology

[0002] Perovskite materials can be prepared into high-quality thin films using a simple low-temperature solution method. Among the many solution processing technologies, the blade coating method is widely used due to its high material utilization rate and good compatibility with roll-to-roll processes.

[0003] An automatic coating device is disclosed in the existing patent publication number CN223683860U, which includes a support base, a working platform, a limiting plate, a reciprocating motion mechanism, a slider, a vertical plate, an adjustment mechanism, a connecting rod, a scraper, a connecting plate, a micrometer fine adjuster, and a control panel. The position of the scraper can be precisely adjusted by the adjustment mechanism and the micrometer fine adjuster, thereby achieving precise control of the thickness of the battery film. The reciprocating motion mechanism drives the scraper to move to achieve automatic coating, which can reduce the impact of human factors on the coating quality.

[0004] In the above technical solution, the perovskite coating is poured onto the battery to be coated manually, and then a scraper is used to scrape the coating onto the battery surface. However, manual dripping has uncertainties, such as inaccurate dosage control, which can easily lead to uneven initial liquid film distribution, thereby affecting the overall uniformity of the film and the repeatability of the process. In addition, manual operation also reduces work efficiency.

[0005] Therefore, it is necessary to provide an automatic perovskite thin film coating device for dispensing samples to solve the problems mentioned in the background art. Summary of the Invention

[0006] The purpose of this invention is to provide an automatic perovskite thin film coating device that automatically dispenses samples, eliminating the uncertainty of manual operation. It has a simple structure, high coating efficiency, and can effectively improve the yield of perovskite thin films without repeated adjustments.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an automatic perovskite thin film coating device for sample dispensing, comprising a base, a hanging mechanism, a scraper body and a sample dispensing mechanism; The sample-dropping mechanism is fixed to both sides of the scraper body via a hanging mechanism; The sample dispensing mechanism includes at least three sample dispensing heads, and the three sample dispensing heads are arranged with relative horizontal displacement along the scraper body; The length of the droplet distribution is adapted to the width of the abutment; The dropper head is used to automatically and quantitatively deliver the perovskite precursor solution onto the substrate.

[0008] As a preferred embodiment of the present invention, the hanging mechanism includes an adjusting crossbar and a hanging frame; The mounting bracket is arranged in an n-shape; The adjusting crossbar is fixed to the top of the scraper body; The mounting bracket is attached to the top of the adjusting crossbar, and the sample dropper is located on both sides of the mounting bracket.

[0009] As a preferred embodiment of the present invention, the upper part of the adjusting crossbar is provided with a positioning structure for a fixed hanging bracket; The adjusting crossbar has V-shaped grooves at both ends; The inner ends of the mounting bracket are provided with protrusions that fit the V-shaped groove.

[0010] As a preferred embodiment of the present invention, the positioning structure includes a plurality of positioning holes that penetrate through the adjusting crossbar; The top of the mounting bracket is provided with a liftable positioning pin; The through end of the positioning pin extends into the positioning hole; The positioning pin is adapted to the positioning hole.

[0011] As a preferred embodiment of the present invention, a central limiting rod is fixedly connected to the top of the hanging frame, and a baffle is fixedly connected to the top of the central limiting rod. The top of the mounting bracket is provided with a movable lever, and the positioning pin passes through the four corners of the lever and is fixedly connected to it. The central limiting rod passes through the lever and slides with it.

[0012] As a preferred embodiment of the present invention, a groove is formed at the top center of the lever block; A spring is installed inside the settling tank, and the spring is sleeved on the outside of the central limiting rod.

[0013] In a preferred embodiment of the present invention, the diameter of the settling trough is smaller than the diameter of the baffle plate; In the initial state, the minimum distance between the baffle and the push block is equal to the depth of the positioning pin extending into the positioning hole.

[0014] As a preferred embodiment of the present invention, the two ends of the hanging bracket are provided with long vertical holes; The end of the sample dropper near the scraper body is provided with a locking part, and a bolt rod is locked in the internal thread of the locking part. The bolt rod passes through the long vertical hole and is fitted with it with a clearance.

[0015] As a preferred embodiment of the present invention, the scraper body has transverse grooves on both sides, and the head end of the bolt rod is adapted to the transverse grooves.

[0016] As a preferred embodiment of the present invention, the scraper body is provided with lifting adjustment parts at both ends; One end of the lifting and adjusting unit is equipped with a linear horizontal module.

[0017] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: In the present invention, the dripping mechanism is fixed to both sides of the scraper body by the hanging mechanism, without the need for the equipment itself to add a support device. The design is simple, further simplifies the equipment structure, facilitates disassembly and assembly, and improves the modularity of the equipment. The system is equipped with an automatic dispensing mechanism and a reciprocating scraper body, which automates the entire coating process, improving production efficiency and consistency. Attached Figure Description

[0018] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.

[0019] In the attached diagram: Figure 1 This is an overall schematic diagram of the perovskite thin film coating device of the present invention; Figure 2 This is a three-dimensional schematic diagram of the lifting adjustment part and the linear horizontal module of the present invention; Figure 3 yes Figure 2 A magnified view of a portion of region A; Figure 4 This is a cross-sectional schematic diagram of the mounting mechanism of the present invention; Figure 5 This is a three-dimensional schematic diagram of the bottom of the mounting bracket of the present invention; Figure 6 This is a three-dimensional schematic diagram of the central limiting rod of the present invention; Figure 7 yes Figure 4 A magnified view of a portion of region B; In the diagram: 1. Hanging mechanism; 101. Adjusting crossbar; 102. Hanging frame; 103. Protrusion; 104. Positioning hole; 105. Positioning pin; 106. Center limit rod; 107. Pulley; 108. Sinking groove; 2. Scraper body; 201. Long vertical hole; 3. Dispensing head; 301. Locking part; 302. Bolt rod; 4. Lifting and adjusting unit; 5. Base; 6. Linear horizontal module; 7. Spring components. Detailed Implementation

[0020] The following disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0021] Please see Figure 1-7 The present invention provides a technical solution: an automatic dripping perovskite thin film coating device, comprising a base 5, a hanging mechanism 1, a scraper body 2 and a dripping mechanism; The sample dispensing mechanism is fixed to both sides of the scraper body 2 via the hanging mechanism 1; The sample dispensing mechanism includes at least three sample dispensing heads 3, and the three sample dispensing heads 3 are arranged in a relatively horizontal displacement along the scraper body 2; The length of the sample dropper 3 is adapted to the width of the base 5; The dropper head 3 is used to automatically and quantitatively deliver the perovskite precursor solution to the substrate 5.

[0022] Specifically, before the work begins, the staff first adjusts the relative position of the sample head 3 to match the width of the base 5, ensuring that the liquid can evenly cover the working area. The sample dispensing mechanism is fixed to both sides of the scraper body 2 by the hanging mechanism 1, so that the film can be scraped during the reciprocating motion. The three sets of sample heads 3 evenly drip the liquid, which can ensure that the liquid film is evenly distributed in the early stage. After the liquid is dripped, the scraper body 2 is driven to move horizontally and uniformly along the surface of the base 5, and the uniform coating of the liquid film is completed by the scraper. In this embodiment, by setting up a dropping mechanism, the quantitative automatic delivery of the precursor solution is realized, avoiding the uncertainty of manual dropping, thereby improving the uniformity of the film. Furthermore, the sample-dropping mechanism is fixed to both sides of the scraper body 2 via the hanging mechanism 1, eliminating the need for additional support devices on the equipment itself. This simple design further simplifies the equipment structure, facilitates disassembly and assembly, and improves the modularity of the equipment. Furthermore, by setting up an automatic dripping mechanism and a reciprocating scraper body 2, the entire scraping process is fully automated, improving production efficiency and consistency. Furthermore, the distribution position of the sample dropper 3 is set to match the width of the base 5, which is suitable for adjusting bases 5 of different sizes and has strong versatility; Preferably, the dropper head 3 is connected to the storage tank via a flexible tube, which can be made of a corrosion-resistant material to avoid long-term corrosion of the tube by the perovskite precursor solvent; Preferably, an external syringe pump is used to precisely control the solution output of the reservoir, ensuring that the sample dropper 3 can quantitatively output the precursor solution; at the same time, the flow rate of the syringe pump can be adjusted in real time through the control panel to suit different working needs.

[0023] Based on the above embodiments, the hanging mechanism 1 includes an adjusting crossbar 101 and a hanging frame 102; The mounting bracket 102 is arranged in an "n" shape; The adjusting crossbar 101 is fixed to the top of the scraper body 2; The mounting bracket 102 is attached to the top of the adjusting crossbar 101, and the sample dropper 3 is located on both sides of the mounting bracket 102.

[0024] Based on the above embodiments, a positioning structure for a fixed hanging bracket 102 is provided on the upper part of the adjusting crossbar 101; The adjusting crossbar 101 has V-shaped grooves at both ends; The two ends of the inner side of the mounting bracket 102 are provided with protrusions 103 that are adapted to the V-shaped groove.

[0025] Specifically, the mounting bracket 102 is suspended on the top of the adjusting crossbar 101, and the protrusions 103 at both ends of its interior are inserted into the V-shaped grooves at both ends of the adjusting crossbar 101 to achieve horizontal sliding guidance and limit displacement in the height direction, so as to facilitate the adjustment of the position of the sample head 3 itself. Then, the positioning structure is used to achieve positioning and avoid shaking during operation. In this embodiment, a hooking mechanism 1 is provided to achieve a fast and stable connection to the dripping mechanism. At the same time, a positioning structure is provided to ensure the positioning accuracy when the dripping head 3 is moved and adjusted. The structure is simple, easy to operate, and highly practical. Furthermore, the mounting bracket 102 is set to an n-shape, so that a dripping mechanism can be set on both sides of the scraper body 2, so that the scraper body 2 can work in both directions, avoiding the need for the scraper body 2 to be constantly reset before it can be scraped in one direction when only one side drips, thus improving work efficiency. Preferably, the mounting bracket can be made of lightweight and corrosion-resistant materials, including but not limited to aluminum alloy or high-strength composite plastic, thereby reducing the overall weight of the equipment and further enhancing its corrosion resistance.

[0026] Based on the above embodiments, the positioning structure includes a plurality of positioning holes 104 that penetrate the adjusting crossbar 101; A height-adjustable positioning pin 105 is provided through the top of the mounting bracket 102; The through end of the positioning pin 105 extends into the positioning hole 104; The positioning pin 105 is adapted to the positioning hole 104.

[0027] Specifically, the positioning pin 105 is installed on the top of the bracket 102. By pulling the pin, it is inserted into the positioning hole 104 on the adjusting crossbar 101, so as to realize the quick installation of the bracket 102 and the horizontal position adjustment and fixation. In this embodiment, by setting the positioning hole 104 and the positioning pin 105, the positioning connection of the hanging frame 102 on the adjusting crossbar 101 is realized, so as to avoid the hanging frame 102 from shifting due to vibration. Furthermore, the evenly distributed positioning holes 104 allow for adjustment of the position of the sample dropper 3 to accommodate different base widths 5, thereby improving the applicability and flexibility of the equipment. Preferably, the top of the positioning pin 105 is equipped with an anti-slip handle to facilitate manual operation, and the end of the through part is chamfered to facilitate insertion into the positioning hole 104 and reduce wear.

[0028] Based on the above embodiments, a central limiting rod 106 is fixedly connected to the top of the hanging bracket 102, and a baffle is fixedly connected to the top of the central limiting rod 106. The top of the mounting bracket 102 is provided with a movable lever 107, and the positioning pin 105 passes through the four corners of the lever 107 and is fixedly connected to it. The center limit rod 106 passes through the lever block 107 and slides with it.

[0029] Specifically, the operator moves the lever 107, causing the positioning pins 105 at its four corners to rise and fall simultaneously. When the lever 107 slides down, the positioning pins 105 are inserted into the positioning holes 104 of the adjusting crossbar 101, thereby positioning the hanger 102. In this embodiment, a central limiting rod 106 and a baffle are provided to limit the range of motion of the lever 107, preventing the lever 107 from completely disengaging. The lever 107 also facilitates the unified operation of several positioning pins 105, allowing users to quickly adjust the installation position of the hanging bracket 102, thus improving operational convenience and work efficiency. Preferably, the bottom end of the center limiting rod 106 is fixed to the top of the hanging bracket 102 and is fixed by threaded engagement to ensure a stable connection with the hanging bracket 102 and facilitate disassembly and assembly. Preferably, the surface of the center limiting rod 106 is smoothed or coated to further reduce sliding friction.

[0030] Preferably, the lever 107 is a rectangular block that is slidably mounted on the top of the bracket 102, with a guide hole in the center that matches the size of the center limiting rod 106, to ensure that the lever remains stable when it slides up and down along the limiting rod. Preferably, positioning pins 105 are provided to pass through the four corners of the lever block 107 and are fixed by threaded connection. When the lever block 107 is moved, the positioning pins 105 move synchronously, thereby realizing the insertion and removal operation and position adjustment. Preferably, the bottom of the lever 107 is provided with grooves around its perimeter so that the operator can easily operate it even with wet hands or wearing gloves.

[0031] Based on the above embodiments, a recessed groove 108 is provided at the top center of the pusher block 107; A spring element 7 is installed inside the settling tank 108, and the spring element 7 is sleeved on the outside of the central limiting rod 106.

[0032] Based on the above embodiments, the diameter of the settling tank 108 is smaller than the diameter of the baffle plate; In the initial state, the minimum distance between the baffle and the lever 107 is equal to the depth of the positioning pin 105 extending into the positioning hole 104.

[0033] In this embodiment, a spring 7 is provided in the groove 108 at the top of the lever 107 and the spring is sleeved on the outside of the central limiting rod 106. In the initial state, the spring force applies downward pressure to the lever 107 to ensure the stability of the positioning. When the position needs to be adjusted, the lever 107 is pulled up. Under the action of the spring 7, the positioning pin 105 is reset and locked into the positioning hole 104. This simplifies manual operation, improves automation and ease of operation, and realizes the automatic reset of the lever 107. Furthermore, the diameter of the recess 108 is set to be smaller than the diameter of the baffle, and the minimum distance between the baffle and the push block 107 is set to be equal to the depth of the positioning pin 105 in the positioning hole 104, thereby ensuring that the positioning depth of the positioning pin 105 remains consistent after each operation, avoiding the positioning pin 105 from not being fully engaged, and improving positioning accuracy.

[0034] Based on the above embodiment, the two ends of the mounting bracket 102 are provided with elongated vertical holes 201; The end of the sample dropper 3 near the scraper body 2 is provided with a locking part 301. The locking part 301 is internally threaded with a bolt rod 302, which passes through the long vertical hole 201 and is fitted with it with a clearance.

[0035] Based on the above embodiments, the scraper body 2 has transverse grooves on both sides, and the head end of the bolt rod 302 is adapted to the transverse grooves.

[0036] In this embodiment, the two ends of the mounting bracket 102 are provided with long vertical holes 201, so that the bolt rod 302 passes through the long vertical holes 201 and can move in the vertical direction, thereby adjusting the position of the sample head 3 and its distance relative to the base 5. It can be adjusted according to the actual installation needs on site, and has good adaptability. Furthermore, the bolt rod 302 is threadedly connected to the locking part 301 to achieve locking, which facilitates quick disassembly and assembly of the sample head 3. At the same time, the head end of the bolt rod 302 is embedded in the transverse grooves on both sides of the scraper body 2 to accommodate the protrusion of the head end and avoid interference between the head end and the scraper body 2.

[0037] Based on the above embodiments, lifting adjustment parts 4 are provided at both ends of the scraper body 2; A linear horizontal module 6 is provided at one end of the lifting adjustment part 4.

[0038] Preferably, the lifting adjustment part 4 is disposed at both ends of the scraper body 2, and includes a lead screw, a handwheel, and a nut mechanism connected to the scraper body; the lead screw drives the scraper body 2 to move up and down in the vertical direction through threaded transmission; In this embodiment, the operator rotates the handwheel of the lifting adjustment part 4 at both ends, which drives the lead screw to rotate. The screw thread transmission converts the rotational motion into linear motion, causing the scraper body 2 to rise and fall in the vertical direction, thereby adjusting the height between the scraper body 2 and the base 5, and thus controlling the scraping thickness and scraping contact force of the coating material. Preferably, the linear horizontal module 6 is located on the outside of the lifting adjustment part 4, and includes a guide rail, a slider, and a screw mechanism, thereby driving the scraper body 2 to move horizontally back and forth to achieve scraping operation; Since both the lifting adjustment unit 4 and the linear horizontal module 6 are existing technologies in this field, they will only be briefly described here.

[0039] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection, the internal communication between two components, or the interaction between two components. Those skilled in the art can understand the meaning of the above terms in this application according to the specific circumstances.

[0040] The above provides a detailed description of an automatic perovskite thin film coating device for dispensing samples according to the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An automatic perovskite thin film coating device, characterized in that, It includes a base (5), a hanging mechanism (1), a scraper body (2), and a sample dropping mechanism; The dripping mechanism is fixed to both sides of the scraper body (2) by the hanging mechanism (1); The sample dispensing mechanism includes at least three sample dispensing heads (3), and the three sample dispensing heads (3) are arranged in a relatively horizontal displacement along the scraper body (2); The length of the dropper head (3) is adapted to the width of the abutment (5); The dropper head (3) is used to automatically and quantitatively deliver the perovskite precursor solution to the substrate (5).

2. The automatic perovskite thin film coating device according to claim 1, characterized in that, The hanging mechanism (1) includes an adjusting crossbar (101) and a hanging frame (102). The mounting bracket (102) is arranged in an n-shape; The adjusting crossbar (101) is fixed to the top of the scraper body (2); The mounting bracket (102) is attached to the top of the adjusting crossbar (101), and the drip head (3) is located on both sides of the mounting bracket (102).

3. The automatic perovskite thin film coating device according to claim 2, characterized in that, The adjusting crossbar (101) is provided with a positioning structure for a fixed hanging bracket (102); The adjusting crossbar (101) has V-shaped grooves at both ends; The hanging bracket (102) has protrusions (103) at both ends inside that are adapted to the V-groove.

4. The automatic perovskite thin film coating device according to claim 3, characterized in that, The positioning structure includes a plurality of positioning holes (104) that pass through the adjusting crossbar (101). The top of the mounting bracket (102) is provided with a liftable positioning pin (105). The through end of the positioning pin (105) extends into the positioning hole (104); The positioning pin (105) is adapted to the positioning hole (104).

5. The automatic perovskite thin film coating device according to claim 4, characterized in that, The top of the hanging bracket (102) is fixedly connected to a central limiting rod (106), and the top of the central limiting rod (106) is fixedly connected to a baffle. The top of the mounting bracket (102) is provided with a movable lever (107), and the positioning pin (105) passes through the four corners of the lever (107) and is fixedly connected to it; The central limiting rod (106) passes through the lever (107) and slides with it.

6. The automatic perovskite thin film coating device according to claim 5, characterized in that, The top center of the push block (107) is provided with a groove (108). A spring element (7) is provided inside the settling tank (108), and the spring element (7) is sleeved on the outside of the central limiting rod (106).

7. The automatic perovskite thin film coating device according to claim 6, characterized in that, The diameter of the settling trough (108) is smaller than the diameter of the baffle plate; In the initial state, the minimum distance between the baffle and the push block (107) is equal to the depth of the positioning pin (105) extending into the positioning hole (104).

8. The automatic perovskite thin film coating device according to claim 2, characterized in that, The two ends of the mounting bracket (102) are provided with long vertical holes (201). The sample dropper (3) is provided with a locking part (301) at one end near the scraper body (2). The locking part (301) is threaded with a bolt rod (302). The bolt rod (302) passes through the long vertical hole (201) and is fitted with it with a clearance.

9. The automatic perovskite thin film coating device according to claim 8, characterized in that, The scraper body (2) has horizontal grooves on both sides, and the head end of the bolt rod (302) is adapted to the horizontal grooves.

10. The automatic perovskite thin film coating device according to claim 1, characterized in that, The scraper body (2) is provided with lifting adjustment parts (4) at both ends; A linear horizontal module (6) is provided at one end of the lifting adjustment part (4).

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