Gas supply device for perovskite crystallization

Abstract

The utility model relates to a gas supply device for perovskite crystallization. The gas supply device comprises a gas source assembly, a filtering assembly and a heating assembly, the gas source assembly is used for outputting gas, and the gas is set to be compressed inert gas; the filtering assembly comprises a first filter, a second filter and a third filter; the air inlet end of the first filter is connected with the air source assembly, the first filter, the second filter and the third filter are sequentially arranged in the flowing direction of the air, and the filtering precision values of the first filter, the second filter and the third filter are gradually reduced; the heating assembly is connected with the gas outlet end of the third filter of the filtering assembly and is used for heating the gas filtered by the filtering assembly; according to the utility model, the cleanliness of the inert gas entering the vacuum cavity of the crystallization equipment can be controlled, a perovskite product is prevented from being in contact with oxygen to react, and the perovskite crystallization quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of perovskite crystallization equipment, in particular to a gas supply device for perovskite crystallization. Background Art

[0002] As a new type of third-generation solar cell, perovskite solar cells have broad application prospects in the photovoltaic field due to their high energy conversion efficiency. During the preparation process of perovskite solar cells, the perovskite solution needs to be coated on the conductive glass and then dried, annealed and crystallized to form a perovskite light-absorbing layer.

[0003] Before coating, the surface of the conductive glass needs to be pre-treated and cleaned and then blown dry with gas. Inert gas also needs to be continuously introduced during the heating process of the perovskite material to prevent the perovskite from reacting with oxygen and to dilute and neutralize the harmful gases generated during the heating of the perovskite material. Therefore, an inert gas supply device is required during the preparation of the perovskite light-absorbing layer. If the gas cleanliness is not enough, it will contaminate the glass panel and the prepared product. The prior art lacks a gas supply device with cleanliness control. Utility Model Content

[0004] To this end, the technical problem to be solved by the utility model is to overcome the technical difficulty of the lack of a clean gas supply device in the preparation process of perovskite cells in the prior art, and to provide a gas supply device for perovskite crystallization, which supplies high-purity nitrogen to the crystallization equipment through multi-stage filtration to provide inert gas for perovskite solar crystallization.

[0005] In order to solve the above technical problems, the utility model provides a gas supply device for perovskite crystallization, which comprises:

[0006] A gas source component, the gas source component is used to output gas, and the gas is set to be compressed inert gas;

[0007] A filter assembly, the filter assembly comprising a first filter, a second filter and a third filter; the air inlet end of the first filter is connected to the air source assembly, the first filter, the second filter and the third filter are arranged in sequence along the flow direction of the gas, and the filtering precision values ​​of the first filter, the second filter and the third filter are gradually reduced;

[0008] A heating component is connected to the gas outlet end of the third filter of the filter component, and the heating component is used to heat the gas filtered by the filter component.

[0009] In one embodiment of the utility model, it also includes an air outlet pipe, a connecting pipe and an air supply pipe; the air outlet pipe is used to connect the air source component and the first filter; the connecting pipe is used to connect adjacent filters; the air supply pipe is used to connect the third filter and the heating component.

[0010] In one embodiment of the present invention, at least the inner walls of the connecting pipe and the air supply pipe are provided with a polishing layer, and the material of the inner walls is set to be stainless steel.

[0011] In one embodiment of the present invention, the first filter is configured as an air source processor, and the first filter includes a first filter element; the first filter is configured to separate particles with a particle size of n 1 Impurity particles, n 1 ≥5μm.

[0012] In one embodiment of the present invention, the second filter is configured as a water drop separator, a drain port is provided at the bottom of the second filter, and the two sides of the top of the second filter are respectively connected to the first filter and the third filter; the second filter is configured to separate particles with a particle size of n 2 Impurity particles, n 2 ≥0.3μm.

[0013] In one embodiment of the present invention, the third filter is configured as an oil mist separator, and the third filter is configured to separate particles with a particle size of n 3 Impurity particles, n 3 ≥0.01μm.

[0014] In one embodiment of the present invention, the third filters are provided in at least two groups, and the at least two groups of the third filters are provided in parallel.

[0015] In one embodiment of the utility model, the heating component includes a heater body, an air flow chamber for gas flow is arranged inside the heater body, and the outer layer of the air flow chamber is provided with a guide layer, a thick film heating layer and a mica layer in sequence along the radial direction; a temperature probe is also arranged at one end of the heater body.

[0016] In one embodiment of the present invention, a thread-shaped protrusion is provided on a surface of one side of the guide layer close to the airflow chamber in the radial direction.

[0017] In one embodiment of the present invention, the detection threshold of the temperature probe is set to 200°C.

[0018] The above technical solution of the utility model has the following beneficial effects compared with the prior art:

[0019] The gas supply device for perovskite crystallization described in the utility model can continuously introduce high-temperature clean inert gas to prevent the perovskite product from coming into contact with oxygen and reacting; the filtering accuracy is gradually improved by sequentially arranging multiple stages of filtering, thereby controlling the cleanliness of the inert gas entering the vacuum chamber of the crystallization equipment to ensure the quality of perovskite crystallization. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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:

[0021] Figure 1 This is a schematic diagram of the structure of a gas supply device for perovskite crystallization in a preferred embodiment of the utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the first filter and the second filter in a preferred embodiment of the utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the third filter in the preferred embodiment of the utility model;

[0024] Figure 4 It is a cross-sectional schematic diagram of the heater body in the preferred embodiment of the utility model.

[0025] Explanation of the markings in the figure in the specification: 1. Air source assembly; 2. Filter assembly; 21. First filter; 22. Second filter; 23. Third filter; 3. Heating assembly; 31. Air flow chamber; 32. Guide layer; 33. Thick film heating layer; 34. Mica layer; 4. Air outlet pipe; 5. Connecting pipe; 6. Air supply pipe. DETAILED DESCRIPTION

[0026] 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.

[0027] Example

[0028] In the prior art, the conductive glass is pretreated before the preparation of the perovskite solar cell. In some embodiments, the pretreatment includes ultrasonic cleaning with acetone, isopropanol and deionized water, and then blow-dried by gas after treatment. After drying, the perovskite solution is coated on the conductive glass, and then dried and annealed for crystallization. Since harmful gases are released during the heating process of perovskite, and perovskite reacts with oxygen, in order to avoid the reaction affecting the preparation process and diluting the harmful gases at the same time, it is necessary to introduce inert gas after coating. Accordingly, a gas supply device is urgently needed in the perovskite crystallization process, and in order to avoid impurity particles in the gas from contaminating the surface of the conductive glass or the surface of the perovskite product, it is also necessary to control the cleanliness of the introduced inert gas. Accordingly, the utility model provides a gas supply device for perovskite crystallization, which includes a gas source component 1, a filter component 2 and a heating component 3; the compressed gas source is filtered and heated and then introduced into a reaction chamber where the conductive glass is placed, and the temperature and cleanliness of the introduced gas meet the preparation requirements.

[0029] Specifically, the gas source component 1 is used to output gas, and the gas is set to be a compressed inert gas; in a preferred embodiment of the utility model, the gas is set to be nitrogen; in other embodiments, the gas can also be set to other inert gases that meet actual needs.

[0030] Specifically, refer to Figure 1 As shown, the filter component 2 includes a filter for filtering out impurities, and the filters have at least three types for realizing multi-stage filtration; in a preferred embodiment of the utility model, the filters include a first filter 21, a second filter 22 and a third filter 23; the air inlet end of the first filter 21 is connected to the air source component 1, and the first filter 21, the second filter 22 and the third filter 23 are arranged in sequence along the flow direction of the gas, and the filtering accuracy values ​​of the first filter 21, the second filter 22 and the third filter 23 are gradually reduced, and high-purity nitrogen is obtained after three-stage filtration.

[0031] Further, refer to Figure 2 As shown, the first filter 21 is configured as an air source processor, and the first filter 21 includes a first filter element, and the first filter element is configured as a pure copper material; the first filter 21 is configured to separate particles with a particle size of n 1 Impurity particles, n 1 ≥5μm; preferably, the first filter 21 is set as an SMC AF series oil-water separation gas source filter, which is used to separate impurities with larger particle sizes in the compressed gas.

[0032] Next, the filtering accuracy value of the second filter 22 is smaller than that of the first filter 21, and the second filter 22 is configured to separate particles with a particle size of n 2 Impurity particles, n2 ≥0.3μm; Preferably, the second filter 22 is configured as an SMC AMG series droplet separator for separating solid particulate impurities and droplets in the gas, a drain port is provided at the bottom of the second filter 22, the two sides of the top of the second filter 22 are respectively provided as an air inlet end and an air outlet end, the air inlet end of the second filter 22 is connected to the first filter 21, and the air outlet end of the second filter 22 is connected to the third filter 23; the second filter 22 performs secondary filtration on the gas filtered by the first filter 21, and the particle size of the impurities filtered out is smaller than that of the first filter 21, so that the cleanliness of the obtained gas is higher than that of the first filter 21.

[0033] Continue, refer to Figure 3 As shown, the filtering accuracy value of the third filter 23 is smaller than that of the second filter 22, and the third filter 23 is configured to separate particles with a particle size of n 3 Impurity particles, n 3 ≥0.01μm; preferably, the third filter 23 is configured as an ultrafine oil mist separator, and the gas filtered by the second filter 22 is filtered three times, and the particle size of impurities filtered out is smaller than that of the second filter 22, so that the cleanliness of the gas is higher than that of the second filter 22.

[0034] It should be noted that as the filtering accuracy changes, the gas flow that can be handled by each level of filters also changes accordingly; in the preferred embodiment of the utility model, the time flow rate of the gas that can pass through the third filter 23 is 200L / min, and the number of the third filters 23 can be changed according to the gas flow required to enter the heating component 3; when the third filter 23 is provided with two or more groups, multiple groups of the third filters 23 are arranged in parallel to achieve a larger flow of clean gas output.

[0035] Specifically, the gas supply device for perovskite crystallization also includes an outlet pipe 4, a connecting pipe 5 and an air supply pipe 6; the outlet pipe 4 is used to connect the gas source component 1 and the first filter 21, the connecting pipe 5 is used to connect adjacent filters, and the air supply pipe 6 is used to connect the third filter 23 and the heating component 3; in some embodiments, the heating component 3 heats the clean gas and then transports the high-temperature crystallization inert gas to the reaction chamber through the air supply pipe 6.

[0036] Furthermore, at least the inner walls of the connecting pipe 5 and the air supply pipe 6 are provided with a polishing layer, and at least the material of the inner walls is set to stainless steel; preferably, the connecting pipe 5 and the air supply pipe 6 are both set to clean electrolytic polished stainless steel pipes, which can prevent impurities from contaminating the gas and maintain the cleanliness of the gas entering the reaction chamber. In some embodiments, the material of the outlet pipe 4 is set to stainless steel to avoid contaminating the gas; in some embodiments, the material of the outlet pipe 4 is set to non-metallic, which can reduce the layout cost.

[0037] Specifically, the heating component 3 is connected to the gas outlet end of the third filter 23 of the filter component 2, and the heating component 3 is used to heat the gas filtered by the filter component 2. The heating component 3 is configured as a stainless steel gas heater; the heating component 3 includes a heater body, and an air flow chamber 31 for gas flow is provided inside the heater body, referring to Figure 4 As shown, the outer layer of the airflow chamber 31 is provided with a guide layer 32, a thick film heating layer 33 and a mica layer 34 in sequence along the radial direction; the thick film heating layer 33 and the mica layer 34 are used to convert electrical energy into thermal energy. The heater body is also provided with an electrical connector and a wire for electrical connection, and a support seat and a protective tube for safety protection.

[0038] Furthermore, a threaded protrusion is provided on one side surface of the guide layer 32 close to the airflow chamber 31 in the radial direction for gas guidance, so as to control the gas flow rate and disperse the gas in the airflow chamber 31 so that the clean nitrogen can be heated and heated evenly; preferably, the guide layer is also set to a clean polishing material to avoid gas contamination during the heating process.

[0039] Furthermore, a temperature probe and a thermocouple are provided at one end of the heater body close to the air inlet for temperature detection and over-temperature protection. In a preferred embodiment of the utility model, the detection threshold of the temperature probe is set to 200°C, and one end of the heater body is externally connected to a temperature power regulation module when the heating component 3 is working. When the temperature probe detects that the heater temperature does not exceed the preset detection threshold, the temperature power regulation module is normally connected to the gas flow meter and the throttle valve to control the clean nitrogen to enter the airflow chamber 31 for heating. When the temperature probe detects that the temperature value exceeds the preset value, over-temperature protection is performed, and the gas flow entering the airflow chamber is controlled by the throttle valve. The clean nitrogen can be heated evenly to avoid insufficient temperature rise or uneven temperature, and at the same time avoid safety accidents caused by overheating.

[0040] The gas supply device for perovskite crystallization of the utility model obtains clean nitrogen that can be introduced into a vacuum reaction chamber by filtering step by step through a multi-stage filter and controlling the filtering accuracy; the gas supply device for perovskite crystallization also maintains the cleanliness of nitrogen through a connecting pipe, an air supply pipe and a heating component with a clean inner wall; and further improves the crystallization quality of the product by using an inert gas that meets the cleanliness and temperature requirements.

[0041] 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 therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A gas supply device for perovskite crystallization, characterized in that: include, A gas source component, the gas source component is used to output gas, and the gas is set to be compressed inert gas; A filter assembly, the filter assembly comprising a first filter, a second filter and a third filter; the air inlet end of the first filter is connected to the air source assembly, the first filter, the second filter and the third filter are arranged in sequence along the flow direction of the gas, and the filtering precision values ​​of the first filter, the second filter and the third filter are gradually reduced; A heating component is connected to the gas outlet end of the third filter of the filter component, and the heating component is used to heat the gas filtered by the filter component.

2. The gas supply device for perovskite crystallization according to claim 1, characterized in that: It also includes an air outlet pipe, a connecting pipe and an air supply pipe; the air outlet pipe is used to connect the air source component and the first filter; the connecting pipe is used to connect adjacent filters; and the air supply pipe is used to connect the third filter and the heating component.

3. The gas supply device for perovskite crystallization according to claim 2, characterized in that: At least the inner walls of the connecting pipe and the air supply pipe are provided with a polishing layer, and the material of the inner walls is set to be stainless steel.

4. The gas supply device for perovskite crystallization according to claim 1, characterized in that: The first filter is configured as an air source processor, and the first filter includes a first filter element; the first filter is configured to separate impurity particles with a particle size of n1, where n1≥5 μm.

5. The gas supply device for perovskite crystallization according to claim 1, characterized in that: The second filter is configured as a water droplet separator, a drain port is provided at the bottom of the second filter, and the first filter and the third filter are respectively connected to both sides of the top of the second filter; the second filter is configured to separate impurity particles with a particle size of n2, where n2≥0.3μm.

6. The gas supply device for perovskite crystallization according to claim 1, characterized in that: The third filter is configured as an oil mist separator, and the third filter is configured to separate foreign particles with a particle size of n3, where n3≥0.01 μm.

7. The gas supply device for perovskite crystallization according to claim 1 or 6, characterized in that: The third filters are arranged in at least two groups, and the at least two groups of the third filters are arranged in parallel.

8. The gas supply device for perovskite crystallization according to claim 1, characterized in that: The heating assembly includes a heater body, an airflow chamber for gas flow is arranged inside the heater body, and the outer layer of the airflow chamber is sequentially provided with a guide layer, a thick film heating layer and a mica layer along the radial direction; a temperature probe is also arranged at one end of the heater body.

9. The gas supply device for perovskite crystallization according to claim 8, characterized in that: A thread-shaped protrusion is arranged on a surface of one side of the guide layer close to the airflow chamber in the radial direction.

10. The gas supply device for perovskite crystallization according to claim 8, characterized in that: The detection threshold of the temperature probe is set to 200°C.

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