Perovskite coating equipment and perovskite coating system

Abstract

The utility model provides perovskite coating equipment and a perovskite coating system, and relates to the technical field of perovskite coating. The perovskite coating equipment comprises a connecting support, a coating scraper, an air blowing knife and a purifying device, the coating scraper, the air blowing knife and the purifying device are all installed on the connecting support, meanwhile, the coating scraper is used for coating to form a perovskite liquid film, the air blowing knife is located on one side of the coating scraper, and therefore air is blown to the perovskite liquid film through the air blowing knife. And the purifying device absorbs the volatilized solvent, so that the influence of the solvent remaining in the surface environment of the substrate on the forming of the perovskite thin film can be effectively avoided, the crystal quality of the perovskite thin film can be improved, and the photoelectric conversion efficiency and the yield of the laminated solar cell can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of perovskite coating, and in particular to a perovskite coating device and a perovskite coating system. Background Art

[0002] Perovskite solar cells are solar cells that use perovskite-type metal halide semiconductors as light-absorbing materials. The traditional spin coating method can only prepare perovskite / crystalline silicon stacked solar cells with an area of ​​about 1cm2. For larger-area stacked solar cells, coating methods are more often used because coating methods can achieve large-area thin film preparation and also ensure good thin film uniformity.

[0003] However, the coating method has high requirements for the perovskite precursor solution system and material components. In addition, the inventors have found that the residual solvent in the gas environment on the surface of the substrate after coating has an adverse effect on the subsequent crystallization and film formation of the perovskite film. More residual solvent in the environment usually damages the newly formed perovskite film, and causes the subsequent material crystallization rate to slow down and the crystallization to be uneven. These will cause the performance of perovskite solar cells to decrease and the repeatability to be poor. Utility Model Content

[0004] The purpose of the utility model is to provide a perovskite coating device, which can improve the crystallization quality of the perovskite film during the preparation by the coating method, and improve the photoelectric conversion efficiency and yield rate of the stacked solar cell.

[0005] The utility model also aims to provide a perovskite coating system, which can improve the crystallization quality of the perovskite film during the preparation by the coating method, and improve the photoelectric conversion efficiency and yield rate of the stacked solar cells.

[0006] The embodiments of the present invention can be implemented in the following ways:

[0007] A perovskite coating device, the perovskite coating device comprising:

[0008] Connect the bracket;

[0009] A coating scraper, the coating scraper is mounted on the connecting bracket, and the coating scraper is used for coating to form a perovskite liquid film;

[0010] An air-blowing knife, which is mounted on the connecting bracket and located on one side of the coating blade to blow air toward the perovskite liquid film to accelerate the volatilization of the solvent; and

[0011] A purification device is installed on the connecting bracket and is used to absorb the volatilized solvent.

[0012] Optionally, the purification device includes a first purification head and a second purification head, and the first purification head and the second purification head are respectively located on both sides of the coating scraper; the first purification head and the air blowing knife are located on the same side of the coating scraper, and the first purification head is away from the coating scraper relative to the air blowing knife.

[0013] Optionally, the connecting bracket includes a long bracket and a connecting bracket connected to the long bracket, and along the length direction of the long bracket, the second purification head, the connecting bracket, the air blowing knife and the first purification head are distributed in sequence; the coating scraper is installed at the lower end of the connecting bracket.

[0014] Optionally, the first purification head includes an outer shell, a fan, a support frame and a purification box, the outer shell has a flow channel, and the lower end of the flow channel forms an air inlet; the purification box has a purification chamber, and the upper end of the flow channel is connected to the purification chamber; the support frame is installed in the flow channel, and the fan is installed on the support frame to generate an airflow from the air inlet to the purification chamber through the fan.

[0015] Optionally, the first purification head further comprises a lifting structure, wherein the lifting structure is arranged between the outer shell and the purification box to adjust the height of the outer shell;

[0016] The outer shell is communicated with the purification chamber through the lifting structure.

[0017] Optionally, activated carbon is arranged in the purification chamber.

[0018] Optionally, the purification box further has an air outlet communicated with the purification chamber, and the air outlet is used to discharge the purified gas in the purification chamber.

[0019] Optionally, the perovskite coating device further comprises a coating substrate, wherein the coating substrate is used to carry the material to be coated; and the connecting bracket is slidably connected to the coating substrate.

[0020] Optionally, the connecting bracket also includes a main bracket, the main bracket having a first sliding arm and a second sliding arm, pulleys are respectively installed on the first sliding arm and the second sliding arm; pulley moving grooves are respectively arranged on both sides of the coated substrate, and the pulley on the first sliding arm and the pulley on the second sliding arm are respectively slidably matched with the pulley moving grooves on both sides.

[0021] A perovskite coating system comprises a nitrogen supply device and the above-mentioned perovskite coating device, wherein the nitrogen supply device is connected to an air blowing knife of the perovskite coating device.

[0022] The beneficial effects of the perovskite coating device and the perovskite coating system provided by the embodiments of the present utility model include:

[0023] An embodiment of the utility model provides a perovskite coating device, which includes a connecting bracket, a coating scraper, an air blowing knife and a purification device. The coating scraper, the air blowing knife and the purification device are all installed on the connecting bracket. At the same time, the coating scraper is used to coat and form a perovskite liquid film. The air blowing knife is located on one side of the coating scraper, so that the perovskite liquid film is blown through the air blowing knife box, thereby accelerating the volatilization of the solvent. The purification device absorbs the volatilized solvent, thereby effectively avoiding the influence of the solvent residue on the substrate surface environment on the formation of the perovskite film, thereby helping to improve the crystallization quality of the perovskite film and improve the photoelectric conversion efficiency and yield rate of the stacked solar cells.

[0024] The embodiment of the utility model also provides a perovskite coating system, which includes the above-mentioned perovskite coating device. Since the perovskite coating system includes the above-mentioned perovskite coating device, it also has the beneficial effect of being able to purify the solvent in the substrate surface environment, improve the crystallization quality of the perovskite film, and improve the photoelectric conversion efficiency and yield rate of the stacked solar cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above features and advantages of the present invention can be better understood after reading the detailed description of the embodiments of the present disclosure in conjunction with the following drawings. In the drawings, the components are not necessarily drawn to scale, and components with similar related properties or features may have the same or similar reference numerals.

[0026] Figure 1 A schematic structural diagram of a perovskite coating device provided according to one aspect of the utility model is shown;

[0027] Figure 2 A schematic structural diagram of a first purification head in a perovskite coating device provided according to one aspect of the utility model is shown.

[0028] Reference numerals:

[0029] 100-perovskite coating equipment; 110-connecting bracket; 111-main bracket; 112-connecting arm; 113-first sliding arm; 114-second sliding arm; 115-long bracket; 116-connecting frame; 120-purification head; 121 first purification head; 122-housing part; 1221-horn part; 1222-circular tube part; 1223-air inlet; 123-blower; 124-support frame; 125-purification box; 1251-purification chamber; 1252-air outlet; 126-lifting structure; 127-second purification head; 130-coating scraper; 140-air blowing knife; 150-coating substrate; 151-pulley moving groove. DETAILED DESCRIPTION

[0030] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. Note that the aspects described below in conjunction with the accompanying drawings and specific embodiments are only exemplary and should not be construed as limiting the scope of protection of the present invention.

[0031] In the description of the present utility model, it should be noted that if the terms "upper", "lower", "inside", "outside", "vertical" and the like appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when used, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model.

[0032] At the same time, it should be noted that the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified or limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, an integral connection, or a detachable 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, or the internal communication of two components, etc. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Figure 1 The schematic diagram of the structure of the perovskite coating device 100 provided in this embodiment. Referring to the figure, this embodiment provides a perovskite coating device 100 and also provides a perovskite coating system (not shown).

[0035] The perovskite coating system includes a perovskite coating device 100. At the same time, the perovskite coating system also includes a nitrogen supply device (not shown in the figure). The nitrogen supply device is connected to the air blowing knife 140 of the perovskite coating device 100, so as to supply nitrogen to the air blowing knife 140. In other words, the gas blown by the air blowing knife 140 to the perovskite liquid film is nitrogen.

[0036] The perovskite coating device 100 includes a connecting bracket 110, a coating scraper 130, an air-blowing knife 140, and a purification device. The coating scraper 130, the air-blowing knife 140, and the purification device are all installed on the connecting bracket 110. At the same time, the coating scraper 130 is used to form a perovskite liquid film by coating. The air-blowing knife 140 is located on one side of the coating scraper 130, and the air-blowing knife 140 is used to blow air to the perovskite liquid film, that is, the air-blowing knife 140 is a wind knife structure that can blow air. The air-blowing knife 140 blows air to the perovskite liquid film, thereby accelerating the volatilization of the solvent, and the purification device absorbs the volatilized solvent, so as to effectively avoid the influence of the solvent remaining in the substrate surface environment on the formation of the perovskite film, thereby helping to improve the crystallization quality of the perovskite film and improve the photoelectric conversion efficiency and yield rate of the stacked solar cell.

[0037] The perovskite coating device 100 provided in this embodiment is further described below:

[0038] Please continue to refer to Figure 1 In this embodiment, the purification device includes two purification heads 120, which are respectively a first purification head 121 and a second purification head 127, and the first purification head 121 and the second purification head 127 are respectively located on both sides of the coating scraper 130. The first purification head 121 and the air blowing knife 140 are located on the same side of the coating scraper 130, and the first purification head 121 is away from the coating scraper 130 relative to the air blowing knife 140. In this way, the solvent on both sides of the air blowing knife 140 can be absorbed by the first purification head 121 and the second purification head 127 to ensure the absorption effect and minimize the solvent residue. It can be understood that the specific number of purification heads 120 is not limited here. It can be understood that in some other embodiments, the number of purification heads 120 can also be specifically set according to needs, for example, two purification heads 120 are respectively set on both sides of the coating scraper 130, that is, the number of purification heads 120 is set to four.

[0039] Furthermore, the connecting bracket 110 includes a long bracket 115 and a connecting bracket 116 connected to the long bracket 115, and along the length direction of the long bracket 115, the second purification head 127, the connecting bracket 116, the air blowing knife 140 and the first purification head 121 are distributed in sequence, and the coating scraper 130 is installed at the lower end of the connecting bracket 116.

[0040] Specifically, the long bracket 115 is a long bar-shaped member, the second purification head 127, the air-blowing knife 140 and the first purification head 121 are fixedly installed on the long bracket 115 in sequence along the length direction of the long bracket 115, the connecting frame 116 is fixedly connected to the long bracket 115, and the connecting frame 116 is located between the second purification head 127 and the air-blowing knife 140, and is arranged close to the air-blowing knife 140 relative to the second purification head 127. In this way, the relative positions of the first purification head 121, the second purification head 127, the coating scraper 130 and the air-blowing knife 140 are kept fixed during the coating process through the connecting bracket 110.

[0041] Optionally, the long bracket 115 may be configured to have a mounting hole, and the upper ends of the first purification head 121 and the second purification head 127 are mounted in the mounting hole, so that the upper end surfaces of the first purification head 121 and the second purification head 127 can be connected to the upper space of the long bracket 115. Alternatively, the long bracket 115 may also be configured to have a multi-segment structure, and the adjacent two ends are connected by the purification head 120. Specifically, the long bracket 115 may be configured to include three sections, which are the first bracket section, the second bracket section and the third bracket section. The first bracket section and the second bracket section are connected by the first purification head 121, that is, the first bracket section and the second bracket section are fixedly connected to the two sides of the first purification head 121, respectively, and the second bracket section and the third bracket section are connected by the second purification head 127, that is, the second bracket section and the third bracket are fixedly fixed to the two sides of the second purification head 127, respectively.

[0042] Figure 2 The schematic diagram of the structure of the first purification head 121 in the perovskite coating device 100 provided in this embodiment is shown. Figure 1 and Figure 2 In this embodiment, the structure of the first purification head 121 is the same as that of the second purification head 127. Here, the structure of the first purification head 121 is taken as an example for introduction, and the structure of the second purification head 127 is not repeated.

[0043] The first purification head 121 includes a shell 122, a fan 123, a support frame 124 and a purification box 125. The shell 122 has a flow channel, and the lower end of the flow channel forms an air inlet 1223. The purification box 125 has a purification chamber 1251, and the upper end of the flow channel is connected to the purification chamber 1251, so that the gas entering the flow channel from the air inlet 1223 enters the purification chamber 1251 through the flow channel, thereby being purified. The support frame 124 is installed in the flow channel, and the fan 123 is installed on the support frame 124. At this time, the fan 123 is located in the flow channel, and the fan 123 can generate an airflow flowing from the air inlet 1223 to the purification chamber 1251, so that the external gas containing solvent is sucked into the flow channel and enters the purification chamber 1251 along the flow channel.

[0044] Specifically, the outer shell 122 is a hollow shell-like structure, which has a trumpet part 1221 and a circular tube part 1222 connected to each other, and the circular tube part 1222 is fixedly connected to the small end of the trumpet part 1221. The internal cavity of the trumpet part 1221 and the internal cavity of the circular tube part 1222 are connected to form a flow channel, and the opening of the large end of the trumpet part 1221 is the air inlet 1223, which is arranged downward. The support frame 124 is installed in the circular tube part 1222, and the fan 123 installed on the support frame 124 is located in the trumpet part 1221. The purification box 125 is installed on the long bracket 115.

[0045] Furthermore, the first purification head 121 also includes a lifting structure 126, which is arranged between the shell 122 and the purification box 125, so as to adjust the height of the shell 122 through the lifting structure 126, and then adjust the height difference between the air inlet 1223 and the perovskite liquid film, so as to ensure that the purification device can well realize the gas purification function without affecting the gas blowing crystallization process. At the same time, the flow channel is connected with the purification chamber 1251 through the lifting structure 126. In other words, the lifting structure 126 is a structure with a gas channel, which includes but is not limited to the use of a telescopic bellows.

[0046] In this embodiment, activated carbon (not shown) is further provided in the purification chamber 1251 , and the activated carbon adsorbs the solvent in the gas entering the purification chamber 1251 .

[0047] Furthermore, the purification box 125 also has an air outlet 1252 connected to the purification chamber 1251, and the air outlet 1252 is used to discharge the purified gas in the purification chamber 1251 to prevent the gas containing the solvent from being directly discharged into the atmosphere. Specifically, the air outlet 1252 is arranged at the top of the purification box 125. When the purification box 125 is installed on the long bracket 115, the air outlet 1252 is located on the top surface of the long bracket 115. Optionally, the purification box 125 can be made of stainless steel, and can be set to a porous structure to facilitate gas circulation.

[0048] In this embodiment, the perovskite coating device 100 also includes a coating substrate 150, which is basically used to carry the material to be coated. Specifically, the material to be coated is generally a substrate. The connecting bracket 110 is slidably connected to the coating substrate 150, so that the sliding of the connecting bracket 110 relative to the coating substrate 150 drives the coating scraper 130 to move relative to the coating substrate 150, and then the perovskite liquid film is coated on the substrate. At the same time, during the coating process, the air blowing knife 140, the first purification head 121 and the second purification head 127 are fixed relative to the coating scraper 130.

[0049] In the coating scraper 130 along Figure 1During the movement to the left, the solvent will accelerate to the left under the blowing action of the air blowing knife 140. At this time, the second purification head 127 can absorb the solvent in the environment on the left side of the air blowing knife 140 in time, and the residual unabsorbed solvent on the right side of the air blowing knife 140 is absorbed by the first purification head 121, thereby preventing the solvent from damaging the newly formed perovskite film. Figure 1 During the movement to the right, the solvent will evaporate to the right faster under the blowing action of the air blower 140. At this time, the first purification head 121 can remove the solvent in the environment on the right side of the air blower 140 in time, and the residual unabsorbed solvent on the left side of the air blower 140 is absorbed by the second purification head 127, thereby avoiding the influence of solvent molecules on the subsequent coating of the new perovskite film crystallization.

[0050] Optionally, the connecting bracket 110 further includes a main bracket 111, the main bracket 111 has a first sliding arm 113 and a second sliding arm 114, and pulleys are respectively installed on the first sliding arm 113 and the second sliding arm 114. Pulley moving grooves 151 are respectively provided on both sides of the coating substrate 150, and the pulleys on the first sliding arm 113 and the pulleys on the second sliding arm 114 are respectively slidably matched with the pulley moving grooves 151 on both sides.

[0051] Specifically, the main bracket 111 also includes a connecting arm 112 connected between the first sliding arm 113 and the second sliding arm 114, so that the main bracket 111 is in the shape of a door frame as a whole. One end of the long bracket 115 in the length direction is fixedly connected to the connecting arm 112, and when the main bracket 111 slides relative to the coated substrate 150, the long bracket 115 is located directly above the coated substrate 150. Pulley moving grooves 151 are respectively provided on both sides of the width direction of the coated substrate 150, and the pulley on the first sliding arm 113 is slidably matched with the pulley moving groove 151 on one side of the coated substrate 150, and the pulley on the second sliding arm 114 is slidably matched with the pulley moving groove 151 on the other side of the coated substrate 150. It can be understood that in other embodiments, the sliding connection structure connecting the bracket 110 and the coated substrate 150 can also be specifically set according to needs.

[0052] Furthermore, in order to drive the connection bracket 110 to slide relative to the coating substrate 150, the perovskite coating device 100 may further include a driving structure (not shown).

[0053] The perovskite coating device 100 and the perovskite coating system provided by the embodiment of the utility model, when in use, place the substrate on the coating substrate 150, drive the connecting bracket 110 to slide left and right relative to the coating substrate 150, during the sliding process, the coating scraper 130 is coated on the substrate to form a perovskite liquid film, and at the same time, the air blowing knife 140 blows air in and out on the surface of the perovskite liquid film to accelerate the volatilization of the solvent. The volatilized solvent is absorbed and purified by the first purification head 121 and the second purification head 127, so as to avoid the influence of the solvent on the crystallization of the perovskite film, and the first purification head 121 and the second purification head 127 can adjust the speed of the gas entering from the air inlet 1223 by controlling the speed of the fan 123, further improving the absorption and purification effect, and the solvent entering the purification chamber 1251 is cleanly adsorbed by the activated carbon and discharged into the environment through the air outlet 1252.

[0054] The perovskite coating device 100 and the perovskite coating system can quickly remove residual solvents in the environment after coating the perovskite solution, ensuring that the cleanliness of the gas above the coating substrate 150 is consistent during each coating, thereby improving the crystallization quality of the perovskite film and improving the photoelectric conversion efficiency and yield rate of the stacked solar cells.

[0055] The above is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technology in this field within the technical scope disclosed by the present invention should be included in the protection scope of the present invention.

Claims

1. A perovskite coating device, characterized in that: The perovskite coating device comprises: Connect the bracket; A coating scraper, the coating scraper is installed on the connecting bracket, and the coating scraper is used for coating to form a perovskite liquid film; An air-blowing knife, which is mounted on the connecting bracket and located on one side of the coating blade to blow air toward the perovskite liquid film to accelerate the volatilization of the solvent; and A purification device, which is mounted on the connecting bracket and is used to absorb the volatilized solvent; The purification device includes a first purification head and a second purification head, wherein the first purification head and the second purification head are respectively located on both sides of the coating scraper; the first purification head and the air blowing knife are located on the same side of the coating scraper, and the first purification head is away from the coating scraper relative to the air blowing knife.

2. The perovskite coating device according to claim 1, characterized in that: The connecting bracket includes a long bracket and a connecting bracket connected to the long bracket, and along the length direction of the long bracket, the second purification head, the connecting bracket, the air blowing knife and the first purification head are distributed in sequence; the coating scraper is installed at the lower end of the connecting bracket.

3. The perovskite coating device according to claim 1, characterized in that: The first purification head includes an outer shell, a fan, a support frame and a purification box, the outer shell has a flow channel, and the lower end of the flow channel forms an air inlet; the purification box has a purification chamber, and the upper end of the flow channel is connected to the purification chamber; the support frame is installed in the flow channel, and the fan is installed on the support frame so that the fan generates an airflow flowing from the air inlet to the purification chamber.

4. The perovskite coating device according to claim 3, characterized in that: The first purification head further includes a lifting structure, which is disposed between the outer shell and the purification box to adjust the height of the outer shell; The outer shell is communicated with the purification chamber through the lifting structure.

5. The perovskite coating device according to claim 3, characterized in that: Activated carbon is arranged in the purification chamber.

6. The perovskite coating device according to claim 3, characterized in that: The purification box also has an air outlet communicated with the purification chamber, and the air outlet is used to discharge the purified gas in the purification chamber.

7. The perovskite coating device according to claim 1, characterized in that: The perovskite coating device further comprises a coating substrate, which is used to carry the material to be coated; the connecting bracket is slidably connected to the coating substrate.

8. The perovskite coating device according to claim 7, characterized in that: The connecting bracket also includes a main bracket, which has a first sliding arm and a second sliding arm, and pulleys are respectively installed on the first sliding arm and the second sliding arm; pulley moving grooves are respectively arranged on both sides of the coated substrate, and the pulley on the first sliding arm and the pulley on the second sliding arm are respectively slidably matched with the pulley moving grooves on both sides.

9. A perovskite coating system, characterized in that: The perovskite coating system comprises a nitrogen supply device and the perovskite coating device according to any one of claims 1 to 8, wherein the nitrogen supply device is connected to an air blowing knife of the perovskite coating device.

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