Coating device for improving crystallization uniformity of perovskite solar cell

Abstract

The utility model discloses a coating device for improving the crystallization uniformity of a perovskite solar cell, and relates to a perovskite cell. According to the coating device for improving the crystallization uniformity of the perovskite solar cell, the cooling plates are introduced on the coating mechanism of the perovskite solar cell, the cooling pipes are limited to be distributed in a non-uniform mode, and the number of the starting cooling pipes, the number of the middle cooling pipes and the number of the ending cooling pipes are gradually reduced. Therefore, the temperature of the ending area, the temperature of the middle area and the temperature of the starting area on the surface of the cooling plate can be guaranteed, volatilization of a low-boiling-point solvent in the starting end coating process can be effectively reduced through the design of the non-uniform temperature of the surface of the cooling plate, the coating window period is prolonged, and the crystallization uniformity of different areas of a perovskite layer is improved; the overall performance of the device is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to perovskite battery preparation technical field, specifically, relate to a kind of coating device for improving perovskite solar cell crystallization uniformity. BACKGROUND

[0002] Perovskite material is not calcium nor titanium, but a kind of "ceramic oxide" with the same crystal structure, molecular formula is ABX3, A represents "large radius cation", B represents "metal cation", and X represents "halogen anion". The three kinds of ions can present many magical physical properties through different element arrangement and combination or adjusting the distance between each other, including but not limited to insulation, ferroelectric, antiferromagnetic, giant magnetic effect, etc. As the most potential new material, perovskite can be used as the active layer of solar cell, which has many excellent photoelectric properties, such as adjustable band gap, high light absorption coefficient, low exciton binding energy, high carrier mobility, high defect tolerance, etc.; and perovskite preparation process is simple, which can realize semi-transparent, ultra-light, ultra-thin, flexible, etc.; perovskite raw materials are widely available and abundant. These advantages make perovskite solar cell become a new generation of technology to subvert crystalline silicon and thin film solar cell.

[0003] At present, large-area industrialization is mainly prepared by solution method, that is, perovskite powder is added to solvent to prepare perovskite precursor solution, and then perovskite precursor solution is uniformly coated on the surface of substrate by slot coating or doctor blade coating technology to form liquid film. The liquid film sample is taken off from the coating device and placed in VCD (Vacuum concentrate drying) vacuum flash evaporation equipment to quickly evacuate (5s to reach 10Pa), so that the low-boiling-point solvent is quickly volatilized. Finally, high-temperature annealing (~120℃) is carried out on the heating table to form polycrystalline perovskite film. The size of industrialization sample is generally large, such as 0.6m*1.2m, 1.2m*2.4m, etc. Slot or doctor blade coating needs a certain time from the starting end to the ending end, and the time from the starting end to the ending end will become longer as the sample size becomes larger. The solvent in perovskite solution has high-boiling-point solvent and low-boiling-point solvent. The low-boiling-point solvent is easy to volatilize. Due to the difference in coating time, the low-boiling-point solvent remains on the surface of the sample for different time at the starting end and the ending end, which will cause the different degrees of natural volatilization of low-boiling-point solvent in different areas, and finally cause the inconsistent amount of low-boiling-point solvent retained on the surface of substrate at different positions after coating. After VCD flash evaporation and heating table annealing, the crystallization of perovskite layer in different areas is inconsistent, which affects the performance of the device.

[0004] Therefore, the utility model is proposed. UTILITY MODEL CONTENT

[0005] The utility model discloses a coating device for improving the crystalline uniformity of perovskite solar cell.

[0006] The utility model is realized thus:

[0007] First, the utility model provides a kind of coating device for improving the crystalline uniformity of perovskite solar cell, it includes: coating mechanism and cooling plate, the coating mechanism includes abutment, support frame and coating head, the coating head is installed on the support frame, the support frame reciprocates relative to the abutment, the cooling plate is set on the abutment, multiple cooling pipes are set in the cooling plate, the cooling plate is divided into starting area, intermediate area and end area from coating direction, multiple the cooling pipe corresponding in the starting area is multiple starting cooling pipe, corresponding in the intermediate area is multiple intermediate cooling pipe, corresponding in the end area is multiple end cooling pipe;Multiple the cooling pipe is unevenly arranged, the number of the starting cooling pipe, the intermediate cooling pipe and the end cooling pipe gradually reduces.

[0008] In optional implementation, the interval of adjacent two starting cooling pipes is less than the interval of adjacent two intermediate cooling pipes, and the interval of adjacent two intermediate cooling pipes is less than the interval of adjacent two end cooling pipes.

[0009] In optional implementation, the starting cooling pipes are arranged at equal intervals, the intermediate cooling pipes are arranged at equal intervals, and the end cooling pipes are arranged at equal intervals.

[0010] In optional implementation, the interval of the starting cooling pipes is 1 / 50-1 / 20 of the length of the cooling plate, the interval of the intermediate cooling pipes is 1 / 20-1 / 10 of the length of the cooling plate, and the interval of the end cooling pipes is 1 / 10-1 / 5 of the length of the cooling plate.

[0011] In optional implementation, the interval of adjacent two starting cooling pipes is equal to the interval of adjacent two intermediate cooling pipes and equal to the interval of adjacent two end cooling pipes, and the interval of the last starting cooling pipe and the first intermediate cooling pipe is less than the interval of the last intermediate cooling pipe and the first end cooling pipe.

[0012] In optional implementation, the interval of the last starting cooling pipe and the first intermediate cooling pipe is 1 / 50-1 / 30 of the length of the cooling plate, and the interval of the last intermediate cooling pipe and the first end cooling pipe is 1 / 30-1 / 10 of the length of the cooling plate.

[0013] In an optional embodiment, the number of the starting cooling pipes is 4-5, the number of the intermediate cooling pipes is 3-4, and the number of the ending cooling pipes is 2-3.

[0014] In an optional embodiment, the width proportions of the starting region, the intermediate region and the ending region are 25-35%: 35-50%: 25-35% respectively based on the overall width of the cooling plate.

[0015] In an optional embodiment, the cooling plate is placed on the surface of the base, or the base is provided with a groove, and the cooling plate is embedded in the groove, and the upper surface of the cooling plate is consistent with the upper surface of the base.

[0016] In an optional embodiment, the material of the cooling plate and the cooling pipe is iron, aluminum, copper or stainless steel.

[0017] The utility model has the following beneficial effects:

[0018] The coating device for improving the crystalline uniformity of perovskite solar cells provided by the utility model introduces a cooling plate on the coating mechanism of the perovskite solar cell, and limits the non-uniform arrangement of the cooling pipe, wherein the number of the starting cooling pipe, the intermediate cooling pipe and the ending cooling pipe gradually decreases. In this way, the temperature of the ending region of the cooling plate surface is greater than that of the intermediate region, and the temperature of the intermediate region is greater than that of the starting region. Through the design of the non-uniform temperature of the cooling plate surface, the volatilization of the low-boiling-point solvent in the starting end coating process can be effectively reduced, the coating window period can be increased, the crystalline uniformity of the perovskite layer in different regions can be improved, and the overall performance of the device can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the utility model, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the premise of the drawings.

[0020] Figure 1 The structure schematic view of the coating device for improving the crystalline uniformity of perovskite solar cells provided by the utility model embodiment 1 is provided.

[0021] Figure 2 The arrangement diagram of the cooling pipe in the embodiment 1 is provided.

[0022] Figure 3 The structure schematic view of the coating device for improving the crystalline uniformity of perovskite solar cells provided by the utility model embodiment 2 is provided.

[0023] Figure 4 A layout of the cooling tubes for the example 2.

[0024] Icon: 100 - coating device for improving crystalline uniformity of perovskite solar cell; 110 - coating mechanism; 111 - base; 112 - support frame; 113 - coating head; 120 - cooling plate; 121 - start area; 122 - middle area; 123 - end area; 124 - start cooling tube; 125 - middle cooling tube; 126 - end cooling tube. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0027] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0028] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the present application is used, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0029] In addition, the terms "horizontal", "vertical" and the like do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0030] In the description of the utility model, still need explaining, unless another explicit provision and limitation, term " set " " install " " link " " connect " should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be direct connection, also can be indirectly connected through intermediate medium, can be two element internal communication. For ordinary skilled in the art, can understand the concrete meaning of the above-mentioned term in the utility model according to specific circumstances.

[0031] Embodiment

[0032] Please refer to Figures 1-4 The utility model provides a kind of coating device 100 for improving perovskite solar cell crystalline uniformity, it includes: coating mechanism 110 and cooling plate 120, coating mechanism 110 includes base 111, support frame 112 and coating head 113, coating head 113 is installed on support frame 112, support frame 112 reciprocating motion relative to base 111, cooling plate 120 is set on base 111, multiple cooling pipes are set in cooling plate 120, cooling plate 120 is divided into starting area 121, middle area 122 and end area 123 from coating direction, multiple cooling pipes correspond to starting cooling pipe 124 in starting area 121, correspond to multiple middle cooling pipes 125 in middle area 122, correspond to multiple end cooling pipes 126 in end area 123;Multiple cooling pipes are unevenly arranged, the number of starting cooling pipe 124, middle cooling pipe 125 and end cooling pipe 126 gradually reduces.

[0033] The utility model introduces cooling plate 120 on the coating mechanism 110 of perovskite solar cell, and limits cooling pipe unevenly arranged, wherein, the number of starting cooling pipe 124, middle cooling pipe 125 and end cooling pipe 126 gradually reduces. This can guarantee that the temperature of end area 123 on the surface of cooling plate 120>the temperature of middle area 122>the temperature of starting area 121, through the design of uneven temperature on the surface of cooling plate 120, the volatilization of low-boiling-point solvent in starting end coating process can be effectively reduced, coating window period is increased, perovskite layer different area crystalline uniformity is improved, and overall performance of device is improved.

[0034] In this embodiment, the number of starting cooling pipes 124 is 4-5, the number of intermediate cooling pipes 125 is 3-4, and the number of ending cooling pipes 126 is 2-3. By limiting the number of starting cooling pipes 124, intermediate cooling pipes 125 and ending cooling pipes 126, the more the number of cooling pipes, the better the cooling effect of this region, and the lower the temperature; and the less the number of cooling pipes, the weaker the cooling effect of this region, and the higher the temperature. The width proportions of the starting region 121, the intermediate region 122 and the ending region 123 are 25-35%: 35-50%: 25-35% based on the overall width of the cooling plate 120. The cooling pipes in each region can be better divided by the above width proportions.

[0035] In this embodiment, the cooling plate 120 can be placed on the surface of the base 111, or a groove is provided on the base 111, and the cooling plate 120 is embedded in the groove, and the upper surface of the cooling plate 120 is consistent with the upper surface of the base 111. The materials of the cooling plate 120 and the cooling pipes are iron, aluminum, copper or stainless steel.

[0036] Specifically, the non-uniform arrangement of the cooling pipes has various forms, and the utility model lists two typical but non-limiting examples.

[0037] Among them, the first kind, please refer to Figure 1 and Figure 2 The distance between adjacent two starting cooling pipes 124 is less than the distance between adjacent two intermediate cooling pipes 125, and the distance between adjacent two intermediate cooling pipes 125 is less than the distance between adjacent two ending cooling pipes 126.

[0038] The starting cooling pipes 124 can be arranged at equal intervals or the distance gradually increases along the coating direction, the intermediate cooling pipes 125 can be arranged at equal intervals or the distance gradually increases along the coating direction, and the ending cooling pipes 126 can be arranged at equal intervals or the distance gradually increases along the coating direction.

[0039] Preferably, the starting cooling pipes 124, the intermediate cooling pipes 125 and the ending cooling pipes 126 are arranged at equal intervals according to their respective distances, wherein the distance of the starting cooling pipes 124 is 1 / 50-1 / 20 of the length of the cooling plate 120, the distance of the intermediate cooling pipes 125 is 1 / 20-1 / 10 of the length of the cooling plate 120, and the distance of the ending cooling pipes 126 is 1 / 10-1 / 5 of the length of the cooling plate 120.

[0040] The second kind, please refer to Figure 3 and Figure 4The interval of the last one of the start cooling pipes 124 and the first one of the middle cooling pipes 125 is 1 / 50-1 / 30 of the length of the cooling plate 120; and the interval of the last one of the middle cooling pipes 125 and the first one of the end cooling pipes 126 is 1 / 30-1 / 10 of the length of the cooling plate 120.

[0041] The features and performances of the present application are further described in detail in combination with the embodiments.

[0042] Embodiment 1

[0043] Please refer to Figure 1 and Figure 2 The present embodiment provides a coating device 100 for improving the crystallization uniformity of perovskite solar cells, which comprises a coating mechanism 110 and a cooling plate 120. The coating mechanism 110 comprises a base 111, a support frame 112 and a coating head 113. The coating head 113 is installed on the support frame 112, and the support frame 112 reciprocates relative to the base 111. The cooling plate 120 is arranged on the base 111, and a plurality of cooling pipes are arranged in the cooling plate 120. The cooling plate 120 is divided into a start area 121, a middle area 122 and an end area 123 from the coating direction, and the width proportions of the start area 121, the middle area 122 and the end area 123 are 1 / 3, 1 / 3 and 1 / 3 respectively. The plurality of cooling pipes correspond to four start cooling pipes 124 arranged in the start area 121, three middle cooling pipes 125 arranged in the middle area 122 and two end cooling pipes 126 arranged in the end area 123.

[0044] The interval of the last one of the start cooling pipes 124 and the first one of the middle cooling pipes 125 is 1 / 30 of the length of the cooling plate; and the interval of the last one of the middle cooling pipes 125 and the first one of the end cooling pipes 126 is 1 / 10 of the length of the cooling plate.

[0045] In this embodiment, the widths of the starting area 121, the middle area 122, and the ending area 123 are the same, and the number of cooling pipes set is different, so that the number of cooling pipes gradually decreases from the starting area 121 to the ending area 123, and the spacing between each area increases. Cooling water is provided in the cooling pipes through a circulating water machine, which can ensure that the surface temperature of the cooling plate 120 at the ending end > the surface temperature of the cooling plate 120 at the middle part > the surface temperature of the cooling plate 120 at the starting end. Through the design of the non-uniform temperature of the surface of the cooling plate 120, the volatilization of the low-boiling-point solvent in the starting end coating process can be effectively reduced, the coating window period can be increased, the crystallization uniformity of the perovskite layer in different areas can be improved, and the overall performance of the device can be improved.

[0046] Embodiment 2

[0047] Please refer to Figure 3 and Figure 4 , the embodiment provides a coating device 100 for improving the crystallization uniformity of a perovskite solar cell, which comprises a coating mechanism 110 and a cooling plate 120. The coating mechanism 110 comprises a base 111, a support frame 112, and a coating head 113. The coating head 113 is installed on the support frame 112, and the support frame 112 reciprocates relative to the base 111. The cooling plate 120 is arranged on the base 111, and a plurality of cooling pipes are arranged in the cooling plate 120. The cooling plate 120 is divided into a starting area 121, a middle area 122, and an ending area 123 from the coating direction, and the proportions of the starting area 121, the middle area 122, and the ending area 123 are 1 / 3, 1 / 3, and 1 / 3, respectively. The plurality of cooling pipes correspond to four starting cooling pipes 124 in the starting area 121, three middle cooling pipes 125 in the middle area 122, and two ending cooling pipes 126 in the ending area 123.

[0048] The spacing between two adjacent starting cooling pipes 124 is less than the spacing between two adjacent middle cooling pipes 125, and the spacing between two adjacent middle cooling pipes 125 is less than the spacing between two adjacent ending cooling pipes 126. The spacing between the starting cooling pipes 124 is 1 / 30 of the length of the cooling plate, the spacing between the middle cooling pipes 125 is 1 / 15 of the length of the cooling plate, and the spacing between the ending cooling pipes 126 is 1 / 8 of the length of the cooling plate.

[0049] By setting the cooling pipes in the starting area 121, the middle area 122 and the ending area 123 with gradient intervals respectively, the starting area 121 is densely arranged at equal intervals, the middle area is normally arranged at equal intervals, and the ending area 123 is sparsely arranged at equal intervals, so that the local position cold field is uniform, and the transition zone is naturally transitioned. The cooling pipes are filled with cooling water, the cooling water is provided by a circulating water machine, the surface temperature of the cooling plate 120 can be ensured to be ending end temperature > middle part temperature > starting end temperature, and through the interval gradient design of the surface of the cooling plate 120, the volatilization of low-boiling-point solvents in the starting end coating process can be effectively reduced, the coating window period is increased, the crystallization uniformity of different areas of the perovskite layer is improved, and the overall performance of the device is improved.

[0050] In summary, the coating device 100 for improving the crystallization uniformity of the perovskite solar cell provided by the utility model introduces the cooling plate 120 on the coating mechanism 110 of the perovskite solar cell, and limits the cooling pipes to be arranged in a non-uniform manner, wherein the number of the starting cooling pipes 124, the middle cooling pipes 125 and the ending cooling pipes 126 gradually decreases. In this way, the temperature of the ending area 123 of the surface of the cooling plate 120 > the temperature of the middle area 122 > the temperature of the starting area 121, through the design of the non-uniform temperature of the surface of the cooling plate 120, the volatilization of low-boiling-point solvents in the starting end coating process can be effectively reduced, the coating window period is increased, the crystallization uniformity of different areas of the perovskite layer is improved, and the overall performance of the device is improved.

[0051] The preferred embodiments of the utility model are described above only, and are not used to limit the utility model, for those skilled in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A coating device for improving crystalline uniformity of a perovskite solar cell, characterized by, It includes: The coating mechanism and the cooling plate, the coating mechanism includes abutment, support frame and coating head, the coating head is installed on the support frame, the support frame reciprocating motion relative to the abutment, the cooling plate is provided on the abutment, the cooling plate is provided with a plurality of cooling pipes, the cooling plate is divided into starting area, middle area and end area from the coating direction, a plurality of the cooling pipe corresponds to the starting area is a plurality of starting cooling pipe, corresponding to the middle area is a plurality of middle cooling pipe, corresponding to the end area is a plurality of end cooling pipe;A plurality of the cooling pipe is unevenly arranged, the number of the starting cooling pipe, the middle cooling pipe and the end cooling pipe gradually decreases. 2.The coating device for improving crystalline uniformity of a perovskite solar cell according to claim 1, characterized in that, The interval of adjacent two starting cooling pipes is less than the interval of adjacent two middle cooling pipes, and the interval of adjacent two middle cooling pipes is less than the interval of adjacent two end cooling pipes. 3.The coating device for improving crystalline uniformity of perovskite solar cells according to claim 2, characterized in that, The starting cooling pipe is arranged at equal intervals, the middle cooling pipe is arranged at equal intervals, and the end cooling pipe is arranged at equal intervals. 4.The coating device for improving crystalline uniformity of perovskite solar cells according to claim 3, characterized in that, The interval of the starting cooling pipe is 1 / 50-1 / 20 of the length of the cooling plate, the interval of the middle cooling pipe is 1 / 20-1 / 10 of the length of the cooling plate, and the interval of the end cooling pipe is 1 / 10-1 / 5 of the length of the cooling plate. 5.The coating device for improving crystalline uniformity of a perovskite solar cell according to claim 1, wherein The interval of adjacent two starting cooling pipes is equal to the interval of adjacent two middle cooling pipes and equal to the interval of adjacent two end cooling pipes, and the interval of the last one of the starting cooling pipe and the first one of the middle cooling pipe is less than the interval of the last one of the middle cooling pipe and the first one of the end cooling pipe. 6.The coating device for improving crystalline uniformity of perovskite solar cells according to claim 5, wherein The interval of the last one of the starting cooling pipe and the first one of the middle cooling pipe is 1 / 50-1 / 30 of the length of the cooling plate, and the interval of the last one of the middle cooling pipe and the first one of the end cooling pipe is 1 / 30-1 / 10 of the length of the cooling plate.

7. The coating apparatus for improving crystalline uniformity of perovskite solar cells according to any one of claims 1-6, characterized in that, The number of the starting cooling pipe is 4-5, the number of the middle cooling pipe is 3-4, and the number of the end cooling pipe is 2-3.

8. The coating apparatus for improving crystalline uniformity of perovskite solar cells according to any one of claims 1-6, characterized in that, The width of the starting area, the middle area and the end area accounts for 25-35%:35-50%:25-35% of the overall width of the cooling plate. 9.The coating device for improving crystalline uniformity of perovskite solar cells according to claim 1, wherein, The cooling plate is placed on the surface of the abutment, or the abutment is provided with a groove, and the cooling plate is embedded in the groove, and the upper surface of the cooling plate is consistent with the upper surface of the abutment. 10.The coating device for improving crystalline uniformity of a perovskite solar cell according to claim 1, wherein The material of the cooling plate and the cooling pipe is iron, aluminum, copper or stainless steel.

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