Perovskite cell annealing assembly and perovskite cell annealing device

Abstract

The utility model relates to the technical field of perovskite cell crystallization, in particular to a perovskite cell annealing assembly and a perovskite cell annealing device, the perovskite cell annealing assembly comprises an electric heating piece and a heat conduction piece, the electric heating piece comprises at least one bending part, and the bending part is arranged on an electric heating plane; the heat conduction piece is integrally formed on the outer side of the electric heating piece, the electric heating piece is wrapped with the heat conduction piece in a zero-clearance mode, the heat conduction piece comprises a first heat release face, and the first heat release face is parallel to the electric heating plane. According to the perovskite cell annealing assembly and the perovskite cell annealing device provided by the utility model, the heat conduction piece is integrally formed outside the electric heating piece, so that the heat conduction piece can wrap the electric heating piece in a zero-clearance manner, the service life of the whole annealing assembly is effectively prolonged, the production cost is reduced, and the production efficiency is improved; and the temperature equalizing effect is good, and the nucleation crystallization quality of the perovskite film is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of perovskite cell crystallization, in particular to a perovskite cell annealing component and a perovskite cell annealing device. Background Art

[0002] Perovskite solar cells (hereinafter referred to as "perovskite cells") have a high photoelectric conversion efficiency and have become the third-generation photovoltaic cells to replace crystalline silicon. In perovskite cells, the perovskite layer serves as the light absorption layer of the perovskite cell, and its quality is closely related to the photoelectric conversion efficiency of the perovskite cell.

[0003] The core process of perovskite battery preparation includes coating, drying and crystallization of perovskite solution. Among them, the perovskite annealing crystallinity is one of the key factors affecting the quality of the perovskite layer. In the prior art, in order to obtain a high-quality perovskite film, after the coating, drying and other treatments of the perovskite solution are completed, it is necessary to anneal it. The common hot plate annealing process transfers heat to the perovskite layer by heat conduction to promote the nucleation and crystallization of the perovskite film. However, when preparing perovskite batteries with high temperature environment requirements, the existing hot plates have a short service life and uneven heating temperature, resulting in poor crystallinity of the perovskite film, thereby affecting the photoelectric performance of the perovskite battery. Utility Model Content

[0004] To this end, the technical problem to be solved by the utility model is to overcome the problem that the existing hot plates are difficult to meet the high-temperature heating environment requirements, have a short service life and uneven heating temperature, resulting in poor crystallinity of the perovskite film, thereby affecting the photoelectric performance of the perovskite cell. A perovskite cell annealing component and a perovskite cell annealing device are provided, which have a long service life and good temperature equalization effect, can improve the nucleation and crystallization quality of the perovskite film, and improve the photoelectric conversion efficiency of the perovskite cell.

[0005] The utility model provides a perovskite cell annealing component, comprising an electric heating element, the electric element comprising at least one bending portion, the bending portion being arranged on the electric heating plane; a heat conductive element, the heat conductive element being integrally formed on the outside of the electric heating element, and the heat conductive element covering the electric heating element with zero gap, the heat conductive element comprising a first heat release surface, and the first heat release surface being parallel to the electric heating plane.

[0006] In an embodiment of the present invention, a reinforcement portion is formed on the heat conducting member at least at a position corresponding to the bending portion.

[0007] In an embodiment of the present invention, the reinforcement portion and the heat conducting member are integrally formed.

[0008] In one embodiment of the present utility model, the bending portion includes a plurality of first bending portions and a plurality of second bending portions, the bending directions of the first bending portions and the second bending portions are opposite, and the plurality of first bending portions and the plurality of second bending portions are alternately arranged in sequence; the reinforcing portion is formed on the heat conductive member corresponding to each of the first bending portions and the second bending portions.

[0009] In one embodiment of the present invention, the heat conducting element further comprises a connecting surface, and the connecting surface is parallel to the first heat releasing surface; wherein the distance from the electric heating element to the first heat releasing surface is equal to the distance from the electric heating element to the connecting surface.

[0010] In an embodiment of the present invention, the melting point of the material of the heat conducting element is not less than 600°C.

[0011] In one embodiment of the present invention, the electric heating element comprises a resistance component, an insulating layer and a protective layer, wherein the insulating layer is coated on the outer side of the resistance component, and the protective layer is coated on the outer side of the insulating layer.

[0012] In an embodiment of the present invention, the material of the insulating layer is set to magnesium oxide, and the material of the protective layer is set to stainless steel.

[0013] The utility model also provides a perovskite cell annealing device, comprising a plurality of perovskite cell annealing components as described in any one of the above items, wherein a plurality of the first heat release surface arrays are spliced ​​to form a second heat release surface, and the second heat release surface is used to provide a heat source to heat the perovskite cell.

[0014] In one embodiment of the present invention, each of the perovskite cell annealing components has its own independent temperature controller, and the temperature controller is used to control and adjust the temperature of the perovskite cell annealing component in which it is located.

[0015] The above technical solution of the utility model has the following beneficial effects compared with the prior art:

[0016] The perovskite battery annealing assembly described in the utility model is provided with a heat-conducting member integrally formed outside the electric heating member, so that the heat-conducting member can cover the electric heating member with zero gap, thereby effectively overcoming the breakdown problem caused by the gap between the groove of the existing aluminum shell and the electric heating tube, extending the service life of the entire annealing assembly, reducing production costs, and improving production efficiency. At the same time, it can also prevent the occurrence of local high temperature problems of the electric heating member, and the temperature equalization effect is good, thereby improving the nucleation and crystallization quality and production efficiency of the perovskite film, and then obtaining a perovskite battery with higher photoelectric conversion efficiency, and effectively improving the production yield of the finished product. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to make the content of the utility model easier to understand, the utility model is further described in detail according to the specific embodiments of the utility model in combination with the accompanying drawings, wherein:

[0018] Figure 1 This is a schematic structural diagram of a perovskite battery annealing assembly from a first perspective in a preferred embodiment of the utility model;

[0019] Figure 2 It is a schematic diagram of a partial cross-sectional structure of a perovskite battery annealing component in a preferred embodiment of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the bending portion and the reinforcing portion in the preferred embodiment of the utility model;

[0021] Figure 4 It is a schematic diagram of the cross-sectional structure of the bending portion and the reinforcement portion in the preferred embodiment of the utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the electric heating element in the preferred embodiment of the utility model;

[0023] Figure 6 This is a second perspective structural diagram of the perovskite battery annealing component in the preferred embodiment of the utility model;

[0024] Figure 7 This is a schematic cross-sectional view of the electric heating element in a preferred embodiment of the utility model;

[0025] Figure 8 This is a schematic diagram of the structure of the perovskite battery annealing device in the preferred embodiment of the utility model.

[0026] Explanation of the reference numerals in the specification: P1, electric heating plane; 10, electric heating element; 11, bending portion; 111, first bending portion; 112, second bending portion; 121, resistance component; 122, insulating layer; 123, protective layer; 20, heat conducting element; 21, first heat dissipating surface; 22, reinforcement portion; 23, connecting surface; 30, second heat dissipating surface; 40, temperature controller. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0028] It should be noted that the perovskite cell includes a glass substrate and a functional layer attached to one side of the glass substrate, wherein the functional layer includes an electron transport layer, a perovskite light absorption layer, a hole transport layer, etc. Each layer structure belongs to the prior art, and its specific definition is not repeated here. The glass substrate and various functional layers stacked therewith constitute the perovskite cell substrate.

[0029] In one embodiment, after the coating process of the perovskite layer is completed, the substrate needs to be subjected to annealing and heating treatment.

[0030] In the process of preparing perovskite cells, the heating temperature required for annealing conventional perovskite layers is relatively low, usually around 150 to 250°C. With the development of technology, the heating temperature required for some perovskite layers continues to increase. For example, the heating temperature required for some perovskite layers can reach 500°C.

[0031] When faced with heating temperature requirements of about 150 to 250°C, conventional hot plates can meet the corresponding temperature requirements. Take a conventional hot plate as an example, which includes an electric heating tube and an aluminum shell that encapsulates the electric heating tube. The electric heating tube has a cylindrical structure. In order to take into account a certain heating effect, the electric heating tube of the hot plate is bent into a serpentine shape. The electric heating tube includes a resistor, an insulating part and a protective part arranged from the inside to the outside, wherein heat is supplied by the resistor, insulation between the resistor and stainless steel is achieved by the insulating part, and protection is provided by the protective part. A groove corresponding to the electric heating tube is provided on the aluminum shell, and the electric heating tube is arranged in the groove of the aluminum shell.

[0032] As the required heating temperature increases, the serpentine electric heating tube is prone to breakdown, causing damage to the heat plate. According to the staff's research, the main reason is that the groove and the electric heating tube are not tightly fitted. Due to the lack of fit, the electric heating tube has a local overtemperature phenomenon. Under the premise of high heating temperature, the electric heating tube is easily broken down and causes damage to the heat plate.

[0033] On this basis, the existing easily damaged hot plates are difficult to meet the production needs of perovskite cells. Frequent replacement of hot plates not only increases production costs, but also reduces production efficiency. In addition, hot plates that are prone to local overtemperature will also affect the uniformity of heating temperature, ultimately leading to poor crystallinity of perovskite films, thereby affecting the photoelectric performance of perovskite cells.

[0034] In order to overcome the above problems, refer to Figure 1 and Figure 2 As shown, the utility model discloses a perovskite cell annealing component, including an electric heating element 10 and a heat conducting element 20.

[0035] The electric heating element 10 belongs to the prior art. When the electric heating element 10 is powered on, it can convert electrical energy into thermal energy. In order to achieve both a good heating effect and a large heating area, the electric heating element 10 is bent. Specifically, the electric heating element 10 includes at least one bending portion 11. Preferably, there are multiple bending portions 11. Regardless of the specific number of the bending portions 11, these bending portions 11 are all arranged on an electric heating plane P1. It should be noted that the electric heating plane P1 is not an actual structure, refer to Figure 4 As shown, the electric heating plane P1 is indicated by a dotted line; taking the electric heating element 10 formed by bending a cylindrical body into a serpentine shape as an example, its axis is located on the electric heating plane P1.

[0036] The heat conductor 20 is used to achieve heat conduction and protect the electric heater 10. Specifically, the heat conductor 20 is integrally formed on the outside of the electric heater 10, and the heat conductor 20 covers the electric heater 10 with zero gap. By setting this structure, the heat conductor 20 can contact and cover the electric heater 10 with zero gap, effectively overcoming the breakdown problem caused by the gap between the groove of the existing aluminum shell and the electric heating tube, extending the service life of the entire annealing assembly, reducing production costs and improving production efficiency. At the same time, it can also prevent the occurrence of local high temperature problems of the electric heater 10, improve the uniformity of the heating temperature, thereby improving the nucleation and crystallization quality and production efficiency of the perovskite film, and then obtain a perovskite battery with higher photoelectric conversion efficiency, effectively improving the finished product production yield. The heat conductor 20 includes a first heat release surface 21, and the first heat release surface 21 is parallel to the electric heating plane P1 to further improve the uniformity of the heating temperature of the first heat release surface 21. Preferably, the heat conductor 20 is set as a rectangular parallelepiped structure to adapt to the square shape of the perovskite battery.

[0037] Those skilled in the art can set a specific one-piece forming method according to actual needs, such as casting, additive manufacturing, etc. Preferably, the one-piece forming of the heat conductor 20 and the electric heating element 10 is achieved by casting. Specifically, a mold is set, and the electric heating element 10 is set in a suitable position. Subsequently, the liquid material for preparing the heat conductor 20 is cast into the mold, and after the liquid material is cooled and solidified, the blank of the heat conductor 20 is obtained. Finally, the blank is processed by methods such as CNC machining, and the machining allowance is removed to obtain the heat conductor 20.

[0038] The perovskite battery annealing assembly described in the utility model is provided with a heat-conducting member 20 integrally formed outside the electric heating member 10, so that the heat-conducting member 20 can cover the electric heating member 10 with zero gap, thereby effectively overcoming the breakdown problem caused by the gap between the groove of the existing aluminum shell and the electric heating tube, extending the service life of the entire annealing assembly, reducing production costs, and improving production efficiency. At the same time, it can also prevent the occurrence of local high temperature problems of the electric heating member 10, and the temperature uniformity effect is good, thereby improving the nucleation and crystallization quality and production efficiency of the perovskite film, and then obtaining a perovskite battery with higher photoelectric conversion efficiency, and effectively improving the production yield of the finished product.

[0039] Reference Figure 3 and Figure 4 As shown, in the perovskite battery annealing assembly of the present invention, in some embodiments, a reinforcing portion 22 is formed on the heat conducting member 20 at least at a position corresponding to the bending portion 11. Figure 4 In the figure, the reinforcement part 22 is indicated by a double-dotted line, and the electric heating element 10 is indicated by a dotted line. According to the research conducted by the staff, the bending part 11 of the electric heating element 10 is particularly prone to breakdown problems. This is because the bending part 11 is formed by bending, and when the traditional aluminum shell faces the bending part 11, its groove is difficult to fit the bending part 11 well, and there is always a certain gap between the two. When faced with a higher heating temperature, the local temperature at the bending part 11 is too high, resulting in breakdown. By providing a reinforcement part 22 corresponding to the bending part 11, the bending part 11 can be closely fitted with the heat conductor 20 to prevent the occurrence of breakdown problems, thereby extending the service life of the entire annealing component.

[0040] Those skilled in the art can set the specific shape, size, material, etc. of the reinforcement part 22 according to actual needs, which will not be described in detail.

[0041] Furthermore, in the perovskite cell annealing assembly described in the present invention, in some embodiments, the reinforcing portion 22 is integrally formed with the heat conductive member 20 to ensure good structural stability and strength of the heat conductive member 20 and facilitate corresponding production and processing of the heat conductive member 20 .

[0042] Further, see Figure 5 As shown, in the perovskite battery annealing assembly of the present invention, in some embodiments, the bending portion 11 includes a plurality of first bending portions 111 and a plurality of second bending portions 112. The bending directions of the first bending portions 111 and the second bending portions 112 are opposite, and the plurality of first bending portions 111 and the plurality of second bending portions 112 are alternately arranged in sequence. Figure 5In the figure, the first bending portion 111 and the second bending portion 112 are distinguished by a dotted line. By setting this structure, the electric heating element 10 is serpentine in shape as a whole. Compared with other structures, such as a coil-shaped structure, it is easy to process, can take into account a larger heating area and a uniform temperature effect, and ensure that the heating effect of the perovskite layer is good and the production efficiency is high. A reinforcement portion 22 is formed on the heat conductive member 20 corresponding to each first bending portion 111 and the second bending portion 112 to effectively prevent the breakdown problem and extend the service life of the entire annealing assembly.

[0043] Reference Figure 4 and Figure 6 As shown, in the perovskite battery annealing assembly described in the utility model, in some embodiments, the heat conductor 20 also includes a connection surface 23, and the connection surface 23 is used to connect with other components and achieve fixation. For example, a packaging shell is provided, the annealing assembly is provided in the shell, and the connection between the two is achieved through the connection surface 23. Those skilled in the art can set a specific connection method according to actual needs, for example, bonding, setting fasteners such as bolts, and clamping. The connection surface 23 is parallel to the first heat release surface 21 to facilitate rapid positioning and assembly.

[0044] Among them, the distance H1 from the electric heating element 10 to the first heat release surface 21 is equal to the distance H2 from the electric heating element 10 to the connection surface 23. By setting this structure, it is possible to ensure that the entire annealing assembly has good structural strength and temperature uniformity, achieve uniform heating of the perovskite layer, improve the quality of perovskite film nucleation and crystallization and production efficiency, and obtain a perovskite cell with higher photoelectric conversion efficiency. Those skilled in the art can set specific distance parameters according to actual needs, and will not be repeated here.

[0045] In the perovskite battery annealing assembly described in the present invention, in some embodiments, the melting point of the material of the heat conductor 20 is not less than 600°C. For example, aluminum, which has a melting point of about 660°C, has a good thermal conductivity. Preferably, the material of the heat conductor 20 is copper or copper alloy. The melting point of copper is about 1083°C, higher than that of aluminum, and it can meet the heating requirements of different temperature ranges. In addition, the specific heat capacity of copper is 0.39×10 3 J / (kg·℃), which is lower than 0.88×10 3 J / (kg·℃), that is, the copper heat conducting member 20 can effectively save energy, reduce production costs and improve production efficiency.

[0046] Reference Figure 7As shown, the perovskite battery annealing component described in the utility model, in some embodiments, the electric heating element 10 includes a resistance component 121, an insulating layer 122 and a protective layer 123, the insulating layer 122 is coated on the outside of the resistance component 121, and the protective layer 123 is coated on the outside of the insulating layer 122. The resistance component 121 is energized to generate heat, the insulating layer 122 is used to achieve insulation between the resistance component 121 and the protective layer 123, and the protective layer 123 is used to protect the internal insulating layer 122 and the resistance component 121. The electric heating element 10 of this structure is a prior art, which can be more conveniently obtained to realize the preparation of annealing components, reduce production costs and improve production efficiency. Those skilled in the art can set the shape, size, material, etc. of each component of the electric heating element 10 according to actual needs, and will not be repeated.

[0047] Furthermore, in the perovskite cell annealing assembly described in the utility model, in some embodiments, the material of the insulating layer 122 is set to magnesium oxide, and the material of the protective layer 123 is set to stainless steel. Preferably, the material of the protective layer 123 is set to 310S stainless steel. 310S stainless steel is an austenitic chromium-nickel stainless steel, which has good high temperature resistance and can meet the requirements of high heating temperature while achieving the protective effect.

[0048] Reference Figure 8 As shown, the utility model discloses a perovskite battery annealing device, comprising a plurality of perovskite battery annealing components as described in any one of the above embodiments, a plurality of first heat release surfaces 21 are arrayed and spliced ​​to form a second heat release surface 30, and the second heat release surface 30 is used to provide a heat source to heat the perovskite battery.

[0049] Reference Figure 6 As shown, in the perovskite cell annealing device of the utility model, in some embodiments, each perovskite cell annealing component has its own independent temperature controller 40, and the temperature controller 40 is used to control and adjust the temperature of the perovskite cell annealing component in which it is located. Preferably, the temperature controller 40 is set as a thermocouple.

[0050] By setting up this structure, the second heat release surface 30 with a relatively large area can be divided into multiple first heat release surfaces 21 with relatively small areas, and each annealing component can be independently temperature controlled by setting up a respective independent temperature controller 40, thereby effectively ensuring the temperature consistency of each area of ​​the second heat release surface 30, reducing the surface temperature difference, improving the nucleation and crystallization quality of the perovskite film, and improving the overall production efficiency.

[0051] The perovskite battery annealing device described in the utility model includes the perovskite battery annealing components described in the above embodiment, so the beneficial effects it has are all possessed by the perovskite battery annealing device, which will not be repeated. Those skilled in the art can set the specific number of annealing components, array arrangement, temperature control conditions, etc. according to actual needs, which will not be repeated. Preferably, nine annealing components are selected and arranged in a 3*3 array.

[0052] Working principle:

[0053] After the perovskite solution is coated and vacuum pre-dried to form a film, the perovskite cell is transported to the heating device for heating by a corresponding transport device, such as a robotic arm. During heating, the perovskite cell is arranged on one side of the second heat release surface 30, and the electric heating element 10 of each annealing assembly is powered on for heating, and the heat is transferred to the perovskite layer through the heat conductive element 20 to achieve annealing heating.

[0054] During the annealing and heating process, the temperature controller 40 controls the temperature of each annealing component in real time to prevent a large temperature difference between the annealing components. When the temperature of the corresponding annealing component reaches the required temperature, the heating is stopped. The perovskite battery annealing device described in the utility model can achieve uniform heating, meet the annealing and heating requirements of perovskite batteries with high heating temperatures, and obtain perovskite batteries with higher photoelectric conversion efficiency.

[0055] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention of the utility model.

Claims

1. A perovskite cell annealing component, characterized in that: include: An electric heating element, wherein the electric heating element comprises at least one bending portion, and the bending portion is arranged on the electric heating plane; The heat conducting member is integrally formed on the outer side of the electric heating member, and the heat conducting member covers the electric heating member with zero gap, and the heat conducting member includes a first heat releasing surface, and the first heat releasing surface is parallel to the electric heating plane.

2. The perovskite cell annealing assembly according to claim 1, characterized in that: A reinforcement portion is formed on the heat conducting member at least at a position corresponding to the bending portion.

3. The perovskite cell annealing assembly according to claim 2, characterized in that: The reinforcement portion and the heat conducting member are integrally formed.

4. The perovskite cell annealing assembly according to claim 2, characterized in that: The bending portion includes a plurality of first bending portions and a plurality of second bending portions, the bending directions of the first bending portions and the second bending portions are opposite, and the plurality of first bending portions and the plurality of second bending portions are alternately arranged in sequence; the reinforcing portion is formed on the heat conducting member corresponding to each of the first bending portions and the second bending portions.

5. The perovskite cell annealing assembly according to claim 1, characterized in that: The heat conducting element further comprises a connecting surface, and the connecting surface is parallel to the first heat releasing surface; wherein the distance from the electric heating element to the first heat releasing surface is equal to the distance from the electric heating element to the connecting surface.

6. The perovskite cell annealing assembly according to claim 1, characterized in that: The melting point of the material of the heat conducting element is not less than 600°C.

7. The perovskite cell annealing assembly according to any one of claims 1 to 6, characterized in that: The electric heating element comprises a resistance component, an insulating layer and a protective layer. The insulating layer is coated on the outer side of the resistance component, and the protective layer is coated on the outer side of the insulating layer.

8. The perovskite cell annealing assembly according to claim 7, characterized in that: The material of the insulating layer is set to magnesium oxide, and the material of the protective layer is set to stainless steel.

9. A perovskite battery annealing device, characterized in that: It comprises a plurality of perovskite cell annealing components as described in any one of claims 1 to 8, a plurality of the first heat release surface arrays are spliced ​​to form a second heat release surface, and the second heat release surface is used to provide a heat source to heat the perovskite cell.

10. The perovskite cell annealing device according to claim 9, characterized in that: Each of the perovskite cell annealing components has its own independent temperature controller, and the temperature controller is used to control and adjust the temperature of the perovskite cell annealing component in which it is located.

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