Coating and drying all-in-one machine suitable for perovskite solution

Abstract

The invention relates to a coating and drying all-in-one machine suitable for a perovskite solution, which comprises a coating base, a lead screw, a lead screw driving device, a die head support and a coating die head, a coating platform made of a material with a small infrared ray blocking effect is arranged on the coating base, an infrared heating device is arranged on the coating die head, and the lead screw driving device is arranged on the coating platform. The infrared heating device moves along with the coating die head; the heating and drying device comprises a linear infrared light source, a connecting rod and a rotating device, the linear infrared light source is arranged at the tail end of the connecting rod and located below the coating platform, and the rotating device drives the connecting rod to rotate. According to the invention, the perovskite solution coated on the substrate is heated in real time, so that the wet film is rapidly evaporated and crystallized into the perovskite thin film, the heat accumulation phenomenon in the drying process of a heating stage and the potential safety hazard caused by the heat accumulation phenomenon are avoided, and the uniformity of the perovskite thin film layer is improved. And meanwhile, the coating process and the solvent volatilization process are carried out at the same time through following movement of the infrared heating device, so that the production efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of perovskite solution coating, and particularly relates to a coating and drying integrated machine suitable for perovskite solution. Background Art

[0002] As a new type of solar cell with obvious advantages in photoelectric conversion efficiency, perovskite thin-film solar cells have received extensive attention in recent years. It uses organic-inorganic lead halide perovskite crystals as the light-absorbing layer of the solar cell. A widely used process for preparing the perovskite layer is as follows: a uniform perovskite wet film is obtained by using a slot coating process, and then the substrate is heated on a hot stage of a coater to remove the solvent, causing the perovskite to crystallize. In this process, the hot stage of the coater is used as a heat source to heat and dry the entire substrate. During long-term production, the hot stage is prone to heat accumulation, resulting in uncontrolled evaporation of the solvent in the perovskite wet film, leading to uneven thickness of the finally formed perovskite thin film and many defects, resulting in a low yield rate and reduced production efficiency. In addition, the heat accumulation phenomenon will also cause accelerated aging of the electronic components and coating platform of the coater, resulting in reduced equipment life and accuracy, and even potential safety hazards during the production process. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a coating and drying integrated machine suitable for perovskite solution. An infrared heating device is provided on the coating die head, and the infrared heating device moves together with the coating die head to heat the perovskite solution coated on the substrate in real time, enabling the wet film to quickly evaporate and crystallize into a perovskite thin film, realizing rapid high-throughput crystallization coating, avoiding the heat accumulation phenomenon and potential safety hazards caused by the hot stage drying process, and improving the uniformity of the perovskite thin film layer. At the same time, the following movement of the infrared heating device enables the coating and solvent evaporation processes to be carried out simultaneously, improving production efficiency.

[0004] The present invention is implemented as follows. A coating and drying integrated machine suitable for perovskite solution is provided, which includes a coating base, a lead screw, a lead screw driving device, a die head support, and a coating die head. The lead screw and the lead screw driving device are arranged on the coating base. The die head support reciprocates along the lead screw, and the coating die head is arranged on the die head support. A coating platform made of a material with little blocking effect on infrared light is arranged on the coating base. The substrate to be coated is placed on the upper surface of the coating platform and below the coating die head. An infrared heating device is arranged on the coating die head, and the infrared heating device moves together with the coating die head. The heating and drying device includes a linear infrared light source, a connecting rod, and a rotating device. The linear infrared light source is arranged at the end of the connecting rod and below the coating platform. The head end of the connecting rod is connected to the rotating device, and the rotating device is arranged on the coating die head, and the rotating device drives the connecting rod to rotate.

[0005] Further, the preparation material of the coating platform is transparent quartz.

[0006] Further, the heating and drying device includes a double connecting rod. The first ends of the double connecting rods are respectively connected to the coating die head, and the second ends are respectively connected to both ends of the linear infrared light source. The rotating device drives the double connecting rods to rotate simultaneously.

[0007] Further, the coating and drying integrated machine further includes a control system, and the control system controls the rotation angle of the rotating device.

[0008] Further, the control system also controls the moving speed of the die head support along the lead screw.

[0009] Compared with the prior art, the coating and drying integrated machine applicable to perovskite solution of the present invention includes a coating base, a lead screw, a lead screw driving device, a die head support, and a coating die head. A coating platform made of a material with little infrared light blocking effect is arranged on the coating base. An infrared heating device is arranged on the coating die head, and the infrared heating device moves together with the coating die head; the heating and drying device includes a linear infrared light source, a connecting rod, and a rotating device. The linear infrared light source is arranged at the second end of the connecting rod and is located below the coating platform. The rotating device drives the connecting rod to rotate, and the linear infrared light source passes through the coating platform to heat and dry the substrate coated with perovskite solution on the upper surface of the coating platform. In the present invention, an infrared heating device is arranged on the coating die head, and the infrared heating device moves together with the coating die head to perform real-time heating on the perovskite solution coated on the substrate, so that the wet film quickly evaporates and crystallizes into a perovskite thin film, realizing rapid high-throughput crystallization coating, avoiding the heat accumulation phenomenon in the hot stage drying process and its resulting safety hazards, and improving the uniformity of the perovskite thin film layer. At the same time, the following movement of the infrared heating device enables the coating and solvent volatilization processes to be carried out simultaneously, improving the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a three-dimensional structural schematic diagram of a preferred embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0011] In order to make the technical problems, technical solutions, and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0012] Please refer to Figure 1 As shown, a preferred embodiment of the coating and drying integrated machine applicable to perovskite solution of the present invention includes a coating base (not shown in the figure), a lead screw 1, a lead screw driving device 2, a die head support 3, and a coating die head 4.

[0013] The lead screw 1 and the lead screw driving device 2 are arranged on the coating base. The die head support 3 reciprocates along the lead screw 1. The coating die head 4 is arranged on the die head support 3. A coating platform 5 made of a material with little blocking effect on infrared light is arranged on the coating base. The substrate A to be coated is placed on the upper surface of the coating platform 5 and below the coating die head 4. An infrared heating device 6 is arranged on the coating die head 4, and the infrared heating device 6 moves together with the coating die head 4.

[0014] The heating and drying device 6 includes a linear infrared light source 7, a connecting rod 8, and a rotating device 9. The linear infrared light source 7 is arranged at the end of the connecting rod 8 and below the coating platform 5. The head end of the connecting rod 8 is connected to the rotating device 9. The rotating device 9 is arranged on the coating die head 4, and the rotating device 9 drives the connecting rod 8 to rotate. The linear infrared light source 7 passes through the coating platform 5 to heat and dry the substrate A located on the upper surface of the coating platform 5 and coated with perovskite solution.

[0015] Specifically, the preparation material of the coating platform 5 is transparent quartz, that is, the coating platform 5 is a transparent quartz platform. Because the transparent quartz material has little blocking effect on infrared light.

[0016] In Figure 1 , the heating and drying device 8 includes a double connecting rod. The head ends of the double connecting rod are respectively connected to the coating die head 4, and the tail ends are respectively connected to both ends of the linear infrared light source 7. The rotating device 9 drives the double connecting rod to rotate simultaneously.

[0017] The coating and drying integrated machine further includes a control system (not shown in the figure). The control system controls the rotation angle of the rotating device 9, thereby adjusting the vertical distance between the linear infrared light source 7 and the coating platform 5 to control the process of heating and drying the substrate A coated with perovskite solution.

[0018] The control system also controls the moving speed of the die head support 3 along the lead screw 1, so that the coating speed of the coating die head 4 matches the drying speed of the perovskite solution coated on the substrate A by the infrared heating device 6. The following movement of the infrared heating device 6 enables the coating and solvent volatilization processes to be carried out simultaneously, improving the production efficiency.

[0019] The present invention utilizes the characteristic that the infrared light source only heats the coated perovskite solution to replace the traditional hot stage to dry the substrate A coated with the perovskite solution, effectively avoiding the heat accumulation phenomenon during the long-term operation of the hot stage in the prior art and improving the controllability of the drying conditions; in addition, using the linear infrared light source 7 to dry the perovskite solution has better temperature uniformity and faster heating rate compared with the traditional hot stage, and can achieve the directional solidification of the crystallization of the perovskite material, effectively controlling the film formation speed and method of the perovskite material, thereby improving the quality of the perovskite thin film layer. In addition, during the heating process, the infrared light source has less heat loss of its own, is more energy-saving compared with the traditional hot stage, and can reduce the production cost.

[0020] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A coating and drying integrated machine suitable for perovskite solution, comprising a coating base, a lead screw, a lead screw driving device, a die head support and a coating die head. The lead screw and the lead screw driving device are arranged on the coating base. The die head support reciprocates along the lead screw, and the coating die head is arranged on the die head support. It is characterized in that a coating platform made of a material with little infrared light blocking effect is arranged on the coating base. The substrate to be coated is placed on the upper surface of the coating platform and below the coating die head. An infrared heating device is arranged on the coating die head, and the infrared heating device moves together with the coating die head; the heating and drying device includes a linear infrared light source, a connecting rod and a rotating device. The linear infrared light source is arranged at the end of the connecting rod and below the coating platform. The head end of the connecting rod is connected to the rotating device, and the rotating device is arranged on the coating die head, and the rotating device drives the connecting rod to rotate.

2. The coating and drying integrated machine suitable for perovskite solution according to claim 1, It is characterized in that the preparation material of the coating platform is transparent quartz.

3. The coating and drying integrated machine suitable for perovskite solution according to claim 1, It is characterized in that the heating and drying device includes a double connecting rod. The head ends of the double connecting rod are respectively connected to the coating die head, and the end parts thereof are respectively connected to both ends of the linear infrared light source. The rotating device drives the double connecting rod to rotate simultaneously.

4. The coating and drying integrated machine suitable for perovskite solution according to claim 1, It is characterized in that the coating and drying integrated machine further includes a control system, and the control system controls the rotation angle of the rotating device.

5. The coating and drying integrated machine suitable for perovskite solution according to claim 4, It is characterized in that the control system also controls the moving speed of the die head support along the lead screw.

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