Perovskite thin film preparation device

Abstract

The utility model relates to the technical field of thin film preparation, in particular to a perovskite thin film preparation device which comprises a coating platform, a substrate to be coated is placed on the coating platform, liquid coating is sprayed on the upper surface of the substrate through external spraying equipment, a rolling forming mechanism is arranged above the substrate, and the rolling forming mechanism is arranged above the substrate. A positioning mechanism is arranged below the coating platform, the bottoms of the two ends of the positioning mechanism are installed on the top of a recycling and receiving unit in a matched mode, and a plurality of walking driving mechanisms arranged in the length direction of the coating platform at intervals are installed at the bottom of the recycling and receiving unit. The bottom of the walking driving mechanism is installed on a rail groove in the ground of a workshop. According to the perovskite thin film preparation device, rolling can be completed on the substrate sprayed with the coating, so that a perovskite thin film blank with a proper thickness is formed, the rolling gap can be adjusted in advance according to needs before rolling, the purpose of matching the current thin film preparation requirement is achieved, and the use universality of the perovskite thin film preparation device is improved.

Description

Technical Field

[0001] This utility model relates to the field of thin film preparation technology, and in particular to a perovskite thin film preparation apparatus. Background Technology

[0002] Perovskite thin films are materials with unique optoelectronic properties and are widely used in photovoltaic devices, optoelectronic devices, and other fields. Currently, perovskite thin films are generally produced in large areas using methods such as spray coating and blade coating.

[0003] A search revealed a perovskite thin film coating device disclosed in patent document No. 202222664057.4. Its main structure includes key components such as raw material bottle, coating die head, vibrating component, stirrer, coating platform and substrate.

[0004] As can be seen from its working principle, the above-mentioned perovskite thin film coating device mainly relies on the raw material bottle to continuously feed the raw material to be coated to the coating die head, thereby achieving the purpose of coating a perovskite thin film of a certain thickness on the substrate. The coating die head adopts a doctor blade type die head structure. It can be seen that the above-mentioned coating structure has the following disadvantages in actual use: First, during the coating process, since the coating raw material is in a fluid state, the excess raw material after the doctor blade coating will scatter along the periphery of the substrate, resulting in waste of raw material and easily causing coating defects at the edge of the substrate; Second, the doctor blade coating is inconvenient to adjust when coating films with different thickness requirements, and has insufficient versatility in operation.

[0005] Based on this, the present invention optimizes the design to address the problems existing in the coating preparation process of perovskite thin films in the prior art, and specifically designs a novel perovskite thin film preparation device to better solve the problems existing in the prior art. Summary of the Invention

[0006] To solve one of the aforementioned technical problems, the present invention employs the following technical solution: a perovskite thin film preparation apparatus, comprising a horizontally and fixedly arranged coating platform, on which a substrate to be coated is placed. A liquid coating is sprayed onto the upper surface of the substrate by an external spraying device. A roll forming mechanism is arranged above the substrate, and a positioning mechanism is arranged below the coating platform. The bottom ends of the positioning mechanism are fitted together and mounted on the top of a recycling unit. Several walking drive mechanisms are installed at intervals along the length direction of the coating platform at the bottom of the recycling unit. The bottom of the walking drive mechanisms is mounted on a track groove on the workshop floor.

[0007] In any of the above embodiments, it is preferred that the recycling receiving unit includes a receiving box disposed below the coating platform, a receiving cavity is provided inside the receiving box, a discharge pipe connector is installed on the lower side of the receiving box, the discharge pipe connector is used to discharge the recycled liquid coating inside the receiving cavity, and the walking drive mechanism is installed at the bottom of the receiving box.

[0008] In any of the above embodiments, it is preferred that the walking drive mechanism includes two symmetrically mounted wheel frames fixedly installed at the bottom of the receiving box, and a walking wheel is respectively installed in each of the mounting wheel frames. The inner end of the axle of each walking wheel is connected to a long shaft, and the inner end of each long shaft is connected to a drive component fixedly installed at the bottom of the middle section of the receiving box.

[0009] In any of the above embodiments, it is preferred that the driving component includes a motor frame fixedly installed at the bottom of the middle section of the receiving box, and a dual-output shaft motor is fixedly installed on the motor frame, with the output shafts on both sides of the dual-output shaft motor being coaxially fixedly connected to the long shaft at their corresponding positions.

[0010] In any of the above embodiments, preferably, the positioning mechanism includes a horizontally arranged positioning frame. The bottom sides of the positioning frame are respectively movably engaged with the top sides of the receiving box via inverted U-shaped brackets. A filter section is provided at the top of the middle section of the positioning frame to allow excess liquid coating falling from above to enter the receiving chamber. A recessed part is provided on the left and right sides of the filter section. A synchronous lifting locking component is installed at the position of each recessed part. A top support locking seat is fixedly installed on the top of the two synchronous lifting locking components. A U-shaped locking part is provided at both ends of the top support locking seat. The U-shaped locking cavity of each U-shaped locking part is used to engage with the corresponding parts on the bottom sides of the roll forming mechanism.

[0011] In any of the above embodiments, it is preferred that a horizontal locking screw is screwed into the threaded hole on the outer side wall of each of the U-shaped locking parts, and the inner end of each horizontal locking screw is used to abut against the corresponding parts on both sides of the bottom of the roll forming mechanism.

[0012] In any of the above embodiments, preferably, the roll forming mechanism includes two positioning stands spaced apart on the left and right sides of the coating platform. The bottom of each positioning stand is fitted into the U-shaped locking cavity at its corresponding position and secured by the horizontal locking screw. An isothermal electric heating roller is arranged in the space above the coating platform between the two positioning stands. The two ends of the central shaft of the isothermal electric heating roller move through the shaft holes at the corresponding positions of the positioning stands and extend to their respective outer sides. The isothermal electric heating roller rotates relative to the shaft holes on the two positioning stands. A roll forming gap is provided between the bottom of the isothermal electric heating roller and the top of the substrate. The roll forming gap matches the thickness of the perovskite film to be prepared.

[0013] In any of the above embodiments, it is preferred that external threads are provided on the outer side walls at both ends of the central shaft, and locking screws are screwed into the external threaded sections of the central shaft on the outer side of each of the positioning supports.

[0014] In any of the above embodiments, it is preferred that each of the locking screws is pressed against the outer wall of the central shaft by a positioning screw.

[0015] In any of the above embodiments, it is preferred that the synchronous lifting locking component includes a vertically arranged stud, the top of which is fixed to the bottom of the top support seat, and the lower part of which movably passes through the through hole at the bottom of the corresponding recessed part and extends to the top of the receiving cavity. Locking nuts are screwed onto the external threaded sections of the stud above and below the horizontal section of the recessed part, respectively, and the two locking nuts cooperate to clamp and position the recessed part.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. The perovskite thin film preparation device designed in this utility model can roll the substrate after the coating has been sprayed to form a perovskite thin film blank of appropriate thickness. Before rolling, the rolling gap can be adjusted in advance as needed to match the current thin film preparation requirements and improve its versatility.

[0018] 2. The coating platform in this utility model adopts an existing structure. The substrate is mounted on the coating platform to ensure that the coating material (the coating material is a liquid colloidal raw material for preparing perovskite thin films) is evenly sprayed on its surface when using external spraying equipment. The coating material is rolled and shaped on the surface of the substrate by the isothermal electric heating roller of the roll forming mechanism, thus ensuring the film shaping effect.

[0019] 3. The walking drive mechanism in this utility model can move as needed along the length of the coating platform according to the roller pressing requirements, effectively ensuring that it can drive the roller pressing mechanism and the recycling unit to move accordingly, so as to achieve effective roller pressing and shaping, and at the same time, to collect and recycle the excess coating falling from above. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or components are generally identified by similar reference numerals. In the drawings, the elements or components are not necessarily drawn to scale.

[0021] Figure 1 This is a schematic diagram of the structure of this utility model.

[0022] Figure 2 This is a partial structural schematic diagram of the present invention.

[0023] Figure 3 This is a schematic diagram of the isothermal electric heating roller in the rolling state of this utility model.

[0024] Figure 4 This is a schematic diagram of the isothermal electric heating roller of this utility model.

[0025] In the diagram, 1. Coating platform; 2. Substrate; 3. Track groove; 4. Receiving box; 5. Receiving cavity; 6. Discharge pipe connector; 7. Mounting wheel frame; 8. Traveling wheel; 9. Long shaft; 10. Motor frame; 11. Dual output shaft motor; 12. Positioning frame; 13. Inverted U-shaped bracket; 14. Filter screen section; 15. Recessed section; 16. Top support bracket; 17. U-shaped bracket section; 18. U-shaped bracket cavity; 19. Horizontal locking screw; 20. Positioning stand; 21. Isothermal electric heating roller; 22. Roller gap; 23. Central shaft; 24. Locking screw tube; 25. Positioning screw; 26. Vertical stud; 27. Locking nut. Detailed Implementation

[0026] The embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of the present utility model, and are therefore merely examples and should not be construed as limiting the scope of protection of the present utility model. The specific structure of the present utility model is as follows: Figures 1-4 As shown in the image.

[0027] Example 1: A perovskite thin film preparation apparatus includes a horizontally and fixedly arranged coating platform 1, on which a substrate 2 to be coated is placed. Liquid coating is sprayed onto the upper surface of the substrate 2 by an external spraying device. A roll forming mechanism is arranged above the substrate 2, and a positioning mechanism is arranged below the coating platform 1. The bottom ends of the positioning mechanism are fitted to the top of a recycling unit. Several walking drive mechanisms are installed at intervals along the length direction of the coating platform 1 at the bottom of the recycling unit. The bottom of the walking drive mechanism is installed on a track 3 on the workshop floor.

[0028] In this invention, the perovskite thin film preparation device is first used by placing the walking drive mechanism and the recycling unit below the coating platform 1 and aligning them with the center line before locking them. After the bottom of the walking drive mechanism is in place, the roll forming mechanism is installed, and the roll forming interval between the roll forming mechanism and the substrate 2 is adjusted to meet the requirements. After adjustment, wait for the liquid coating to be applied to the surface of the substrate 2. After the liquid coating is applied, start the roll forming mechanism to heat up the temperature. At the same time, control the walking drive mechanism to move as needed. During the movement, the coating on the surface of the substrate 2 is rolled. Meanwhile, excess coating will continuously fall into the recycling unit, thereby achieving the purpose of quickly receiving and utilizing the residual coating.

[0029] In any of the above embodiments, it is preferred that the recycling receiving unit includes a receiving box 4 disposed below the coating platform 1, a receiving cavity 5 disposed inside the receiving box 4, a discharge pipe connector 6 installed on the lower side of the receiving box 4, the discharge pipe connector 6 being used to discharge the recycled liquid coating inside the receiving cavity 5, and the walking drive mechanism being installed at the bottom of the receiving box 4.

[0030] When recycling the upper coating, the recycling unit can use the receiving chamber 5 to receive the falling coating. Excess coating is collected inside the receiving chamber 5 and is ready for subsequent use.

[0031] In any of the above embodiments, it is preferred that the walking drive mechanism includes two symmetrically mounted wheel frames 7 fixedly installed at the bottom of the receiving box 4, and a walking wheel 8 is respectively installed in each of the mounting wheel frames 7. The inner end of the axle of each walking wheel 8 is connected to a long shaft 9, and the inner end of each long shaft 9 is connected to a drive component fixedly installed at the bottom of the middle section of the receiving box 4.

[0032] In any of the above solutions, it is preferred that the driving components on each of the walking drive mechanisms operate synchronously during operation.

[0033] The walking drive mechanism relies on the drive component as the power component. When the drive component is running, it can drive the walking wheels 8 on both sides to rotate. When the walking wheels 8 are running, they can drive the recycling receiving unit and its components to move accordingly.

[0034] In any of the above embodiments, it is preferred that the driving component includes a motor frame 10 fixedly installed at the bottom of the middle section of the receiving box 4, and a dual-output shaft motor 11 is fixedly installed on the motor frame 10. The output shafts on both sides of the dual-output shaft motor 11 are coaxially fixedly connected to the long shaft 9 at their corresponding positions.

[0035] When the drive unit is working, it mainly relies on the operation of the dual output shaft motor 11 to drive the long shaft 9 and the walking wheel 8 to rotate, ultimately achieving the purpose of driving the walking wheel 8 to rotate.

[0036] In any of the above embodiments, preferably, the positioning mechanism includes a horizontally arranged positioning frame 12. The bottom sides of the positioning frame 12 are respectively movably engaged with the top sides of the receiving box 4 via inverted U-shaped card seats 13. A filter screen part 14 is provided at the top of the middle section of the positioning frame 12 for excess liquid coating falling from above to enter the receiving cavity 5. A recessed part 15 is provided on the left and right sides of the filter screen part 14. A synchronous lifting locking component is installed at the position of each recessed part 15. A top support card seat 16 is fixedly installed on the top of the two synchronous lifting locking components. A U-shaped carding part 17 is provided at both ends of the top support card seat 16. The U-shaped carding cavity 18 of each U-shaped carding part 17 is used to engage the corresponding parts on both sides of the bottom of the roll forming mechanism.

[0037] It should be noted that the positioning mechanism mainly relies on the inverted U-shaped card seat 13 at the bottom of the positioning frame 12 to be engaged with the top of both sides of the receiving box 4 to maintain positioning. Considering that excess paint will continuously flow downwards, a filter screen 14 is provided to allow the liquid paint to flow down and enter the receiving box 4. The two synchronous lifting locking parts set below can realize the positioning of the height of the positioning frame 12, thereby relying on the support of the positioning frame 12 to realize the height positioning of the roll forming mechanism.

[0038] In any of the above embodiments, it is preferred that a horizontal locking screw 19 is screwed into the threaded hole on the outer side wall of each of the U-shaped locking parts 17, and the inner end of each horizontal locking screw 19 is used to abut against the corresponding parts on both sides of the bottom of the roll forming mechanism.

[0039] After the horizontal locking screw 19 is tightened, it can control the bottom sides of the roll forming mechanism to achieve tight positioning, ensuring the positioning effect of the bottom of the roll forming mechanism.

[0040] In any of the above embodiments, preferably, the roll forming mechanism includes two positioning seats 20 arranged at intervals on the left and right sides of the coating platform 1. The bottom of each positioning seat 20 is inserted into the U-shaped locking cavity 18 at its corresponding position and is secured by the horizontal locking screw 19. An isothermal electric heating roller 21 is arranged in the space above the coating platform 1 between the two positioning seats 20. The two ends of the central shaft 23 of the isothermal electric heating roller 21 move through the shaft holes at the corresponding positions of the positioning seats 20 and extend to their respective outer sides. The isothermal electric heating roller 21 rotates relative to the shaft holes on the two positioning seats 20. A roll forming gap 22 is provided between the bottom of the isothermal electric heating roller 21 and the top of the substrate 2. The roll forming gap 22 is matched with the thickness of the perovskite film to be prepared.

[0041] The roll forming mechanism in this utility model mainly relies on the positioning stand 20 for positioning. After positioning, the isothermal electric heating roller 21 is used to roll the top of the substrate 2, which can effectively ensure that the adhesive coating sprayed on the surface of the substrate 2 is shaped and rolled, thereby promoting the formation of the film. During the roll forming, the temperature of the isothermal electric heating roller 21 is controlled to adjust the roll forming gap 22 and control the roll forming effect.

[0042] In any of the above embodiments, it is preferred that external threads are provided on the outer side walls at both ends of the central shaft 23, and locking screws 24 are screwed into the external threaded sections of the central shaft 23 on the outer side of each of the positioning supports 20.

[0043] The locking screws 24, which are screwed together on both sides, can achieve a good locking effect. When it is necessary to lock the isothermal electric heating roller 21, the locking particle size can be controlled by adjusting the locking screws 24.

[0044] Example 2: Compared with Example 1, this example also includes the following technical features:

[0045] In any of the above embodiments, it is preferred that each of the locking screws 24 is pressed against the outer wall of the central shaft 23 by a positioning screw 25.

[0046] In any of the above embodiments, it is preferred that the synchronous lifting locking component includes a vertically arranged stud 26. The top of the stud 26 is fixed to the bottom of the top support seat 16, and the lower part of the stud 26 moves through the through hole at the bottom of the corresponding lower recess 15 and extends to the top of the receiving cavity 5. Locking nuts 27 are screwed onto the external threaded sections of the stud 26 above and below the horizontal section of the lower recess 15, respectively. The two locking nuts 27 cooperate to clamp and position the lower recess 15.

[0047] The synchronous lifting locking component is mainly lifted and lowered by the engagement and adjustment of two locking nuts 27. When the locking nuts 27 are loose, the two vertical studs 26 can be moved up or down synchronously by external force. After moving to the appropriate position, the locking nuts 27 can be tightened again.

[0048] Specific working principle: When using this perovskite thin film preparation device, first place the walking drive mechanism and the recycling receiving unit below the coating platform 1 and lock them after centering them together.

[0049] After the bottom of the walking drive mechanism is installed in place, the roll forming mechanism is installed, and the roll forming interval between the roll forming mechanism and the substrate 2 is adjusted to meet the requirements.

[0050] After adjustment, wait for the liquid coating to be applied to the surface of substrate 2. Once the liquid coating is applied, start the roll forming mechanism to heat up the substrate. Simultaneously, control the walking drive mechanism to move as needed, continuously rolling the coating on the surface of substrate 2 during movement. Excess coating will continuously fall into the recycling unit, thus achieving the purpose of quickly receiving and utilizing residual coating. The roll forming mechanism mainly relies on the positioning stand 20 for positioning. After positioning, the isothermal electric heating roller 21 rolls the top of substrate 2, effectively ensuring that the gel-like coating sprayed on the surface of substrate 2 is properly shaped and rolled, thereby promoting film formation. During rolling, the temperature of the isothermal electric heating roller 21 is controlled to adjust the rolling gap 22, thus controlling the rolling shaping effect.

[0051] In summary, this perovskite thin film preparation device can roll-press the substrate 2 after coating to form a perovskite thin film blank of appropriate thickness. Before rolling, the rolling gap 22 can be adjusted in advance as needed to match the current thin film preparation requirements, thus improving its versatility. The coating platform 1 adopts the existing structure. The substrate 2 is mounted on the coating platform 1, which ensures that the coating (a liquid gel-like raw material for preparing perovskite thin films) is evenly sprayed on its surface when using external spraying equipment. The coating is then rolled and shaped on the surface of the substrate 2 by the isothermal electric heating roller 21 of the rolling forming mechanism, ensuring the film shaping effect. The walking drive mechanism can move as needed along the length of the coating platform 1 according to the rolling requirements, effectively ensuring that it can drive the rolling forming mechanism and the material collection unit to move accordingly. This achieves effective rolling shaping and also collects and recovers excess coating falling from above.

[0052] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, 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 or all of the technical features. Such 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 utility model. For those skilled in the art, any alternative improvements or transformations made to the implementation of this utility model fall within the protection scope of this utility model.

[0053] Any aspects of this utility model not described in detail are known to those skilled in the art.

Claims

1. A device for preparing a perovskite thin film, comprising a coating platform arranged horizontally and fixedly, a substrate to be coated is placed on the coating platform, and a liquid coating is sprayed on the upper surface of the substrate by an external spraying device, characterized in that: A roller forming mechanism is arranged above the substrate, a positioning mechanism is arranged below the coating platform, two ends of the positioning mechanism are matched and installed at the top of a recovery material receiving unit, the bottom of the recovery material receiving unit is installed with a plurality of walking driving mechanisms which are arranged along the length direction of the coating platform, and the bottom of the walking driving mechanism is installed on the rail groove of the workshop ground. 2.The perovskite thin film preparation device of claim 1, wherein: The recovery material receiving unit comprises a material receiving box arranged below the coating platform, a material receiving cavity is arranged in the material receiving box, a material discharging pipe joint is arranged at the lower side of the material receiving box, the material discharging pipe joint is used for discharging the liquid paint recovered in the material receiving cavity to the outside, and the bottom of the material receiving box is installed with the walking driving mechanism. 3.The perovskite thin film preparation device of claim 2, wherein: The walking driving mechanism comprises two symmetrical mounting wheel frames which are respectively fixedly installed at the bottom of the material receiving box, a walking wheel is respectively matched and installed in each mounting wheel frame, the inner end of the wheel shaft of the walking wheel is connected with a long shaft, and the inner end of each long shaft is connected with a driving member fixedly installed at the bottom of the middle section of the material receiving box. 4.The perovskite thin film preparation device of claim 3, wherein: The driving member comprises a motor frame fixedly installed at the bottom of the middle section of the material receiving box, a double-output-shaft motor is fixedly installed on the motor frame, and the output shafts at the two sides of the double-output-shaft motor are coaxially fixedly connected with the long shafts at the corresponding positions. 5.The perovskite thin film preparation device of claim 4, wherein: The positioning mechanism comprises a horizontally arranged positioning frame, the bottom of the two sides of the positioning frame is respectively movably clamped at the top of the two sides of the material receiving box through an inverted U-shaped clamping seat, a filter screen part for the excess liquid paint on the upper part to enter the material receiving cavity is arranged at the top of the middle section of the positioning frame, a sinking part is arranged at the left and right sides of the filter screen part, a synchronous jacking locking member is respectively installed at the position of each sinking part, a top supporting locking seat is fixedly installed at the top of the two synchronous jacking locking members, and a U-shaped locking cavity of each U-shaped locking part is respectively used for clamping the corresponding positions of the bottom of the two sides of the roller forming mechanism. 6.The perovskite thin film preparation device of claim 5, wherein: A horizontal locking screw is respectively screwed in the threaded hole on the outer side wall of each U-shaped locking part, and the inner end of each horizontal locking screw is used for abutting and fixing the corresponding positions of the bottom of the two sides of the roller forming mechanism. 7.The perovskite thin film preparation device of claim 6, wherein: The roller forming mechanism comprises two positioning vertical seats which are oppositely and spacedly arranged at the left and right sides of the coating platform, the bottom of each positioning vertical seat is matched and inserted into the U-shaped locking cavity at the corresponding position and is abuttingly positioned through the horizontal locking screw, an isothermal electric heating roller is arranged in the space above the coating platform between the two positioning vertical seats, the two ends of the central shaft of the isothermal electric heating roller movably pass through the shaft holes at the corresponding positions of the positioning vertical seats and extend to the respective outer sides, the isothermal electric heating roller is relatively rotatable relative to the shaft holes on the two positioning vertical seats, the bottom of the isothermal electric heating roller is arranged with a roller gap on the top of the substrate, and the roller gap is matched with the thickness of the perovskite film which is currently prepared. 8.The perovskite thin film preparation device of claim 7, wherein: The outer thread is arranged on the outer side wall of the center shaft at both ends, and the outer thread section of the center shaft outside each positioning stand is screwed with a locking pipe. 9.The perovskite thin film preparation device of claim 8, wherein: Each locking pipe is abutted against the outer side wall of the center shaft by a positioning screw. 10.The perovskite thin film preparation device of claim 9, wherein: The synchronous jacking locking member comprises a vertical stud fixed at the top of the top supporting jack positioning seat and movably penetrating through the through hole in the bottom of the subsidence part below and extending above the material receiving cavity. The outer thread sections of the vertical stud above and below the horizontal section of the subsidence part are screwed with locking nuts, and the two locking nuts are cooperatively used to clamp and position the subsidence part.

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