Flash evaporation device and perovskite in-situ absorption testing device

Abstract

The utility model discloses a flash evaporation device and a perovskite in-situ absorption testing device. The flash evaporation device comprises a transparent flash evaporation container, the flash evaporation container is internally provided with a closed working chamber, and the working chamber is internally provided with a transparent workbench used for bearing a perovskite film; the heating structure is arranged in the working chamber and is used for heating the perovskite thin film on the workbench; the vacuumizing mechanism is connected with the flash evaporation container and is used for forming a vacuum environment in the working chamber and adjusting the vacuum degree of the working chamber; and the pressure release valve is arranged on the flash evaporation container and is used for adjusting the pressure in the working chamber. According to the utility model, flash evaporation and heating can be carried out on wet film perovskite, in-situ absorption testing can be carried out on the wet film perovskite in the flash evaporation and heating process, and the crystallization process of the perovskite film can be monitored through the in-situ absorption testing.

Description

Technical Field

[0001] The utility model relates to a flash evaporation device and a perovskite in-situ absorption testing device, belonging to the technical field of perovskite testing. Background Art

[0002] Perovskite solar cells (PSCs) have attracted significant attention in the optoelectronics field due to their advantages, including high absorption coefficient, tunable band gap, high carrier mobility, simple fabrication process, and low cost. The crystallization quality of the perovskite film is one of the most important factors affecting the performance of PSCs. UV-visible spectrophotometry can measure the light absorption properties of perovskites, but it is not possible to monitor the crystallization process. Therefore, understanding and monitoring the crystallization process of perovskites can further improve the quality of PSCs by obtaining high-quality PSCs. This testing can also be used to guide adjustments to the perovskite composition, further improving the quality of PSCs. Utility Model Content

[0003] The main purpose of the utility model is to provide a flash evaporation device and a perovskite in-situ absorption testing device, thereby overcoming the deficiencies in the prior art.

[0004] In order to achieve the above-mentioned purpose of the utility model, the technical solution adopted by the utility model includes:

[0005] A first aspect of an embodiment of the present utility model provides a flash evaporation device for performing an in-situ perovskite absorption test, comprising:

[0006] A transparent flash evaporation container, wherein the flash evaporation container has a sealed working chamber, and the working chamber has a transparent working table for supporting the perovskite film;

[0007] a heating structure, disposed in the working chamber and used to heat the perovskite film on the working table;

[0008] a vacuum pumping mechanism connected to the flash evaporation vessel and used to create a vacuum environment in the working chamber and adjust the vacuum degree of the working chamber;

[0009] A pressure relief valve is provided on the flash vessel and is used to adjust the pressure in the working chamber.

[0010] A second aspect of an embodiment of the present invention provides a perovskite in-situ absorption testing device, which includes: an ultraviolet-visible spectrophotometer device and a flash evaporation device for performing perovskite in-situ absorption testing, and the flash evaporation device as a whole can be placed in the testing area of ​​the ultraviolet-visible spectrophotometer device.

[0011] Compared with the prior art, the advantages of the present invention include: an in-situ absorption test device for perovskite provided in an embodiment of the present invention can flash evaporate and heat wet film perovskite, and simultaneously perform in-situ absorption testing on the wet film perovskite during the flash evaporation and heating process, thereby monitoring the crystallization process of the perovskite film through the in-situ absorption test. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0013] Figure 1 This is a structural schematic diagram of a flash evaporation device for performing perovskite in-situ absorption testing provided in a typical implementation case of the present invention. DETAILED DESCRIPTION

[0014] In view of the shortcomings of the existing technology, the inventors of this case, after long-term research and extensive practice, have proposed the technical solution of this utility model. The following will further explain this technical solution, its implementation process and principles.

[0015] A first aspect of an embodiment of the present utility model provides a flash evaporation device for performing an in-situ perovskite absorption test, comprising:

[0016] A transparent flash evaporation container, wherein the flash evaporation container has a sealed working chamber, and the working chamber has a transparent working table for supporting the perovskite film;

[0017] a heating structure, disposed in the working chamber and used to heat the perovskite film on the working table;

[0018] a vacuum pumping mechanism connected to the flash evaporation vessel and used to create a vacuum environment in the working chamber and adjust the vacuum degree of the working chamber;

[0019] A pressure relief valve is provided on the flash vessel and is used to adjust the pressure in the working chamber.

[0020] Furthermore, the flash container includes a container body and a cover plate, the container body has an open chamber inside, the cover plate can be detachably arranged at the opening of the container body and enclosed with the container body to form a closed working chamber, the workbench is located on the bottom surface of the chamber inside the container body, wherein the cover plate and the container body are transparent as a whole.

[0021] Exemplarily, the cover plate and the container body may be made of glass or acrylic components.

[0022] Furthermore, an operating handle is fixed on the cover plate.

[0023] Furthermore, the flash container also includes a flexible sealing ring, which is arranged on the container body and / or the cover plate. The container body and the cover plate are sealed together by the sealing ring. When the cover plate and the container body are in a combined state, the sealing ring located between the container body and the cover plate is in an elastically compressed state, and the sealing ring is tightly fitted to the container body and the cover plate.

[0024] Furthermore, the flash container further comprises a plurality of the sealing rings, and the plurality of sealing rings are arranged at intervals along the radial direction of the container body or the cover plate.

[0025] Furthermore, the container body is further provided with an annular first groove-shaped structure, which is provided around the opening of the internal chamber of the container body; the cover plate is further provided with an annular second groove-shaped structure; a portion of the sealing ring is provided in one of the first groove-shaped structure and the second groove-shaped structure, and another portion protrudes outside the first groove-shaped structure and the second groove-shaped structure; when the cover plate and the container body are in a combined state, the other portion of the sealing ring is provided in the other of the first groove-shaped structure and the first groove structure;

[0026] When the sealing ring is in a relaxed state, the thickness of the sealing ring is greater than the sum of the depths of the first groove-like structure and the second groove-like structure. When the sealing ring is in a compressed state by the cover plate and the container body, the thickness of the sealing ring is slightly greater than or equal to the sum of the depths of the first groove-like structure and the second groove-like structure, and the sealing ring completely fills the first groove-like structure and the second groove-like structure.

[0027] In a more typical embodiment, positioning posts and / or positioning holes are further provided on the cover plate and the container body. When the cover plate and the container body are in a combined state, the positioning posts on one of the cover plate and the container body can be correspondingly embedded in the positioning holes on the other.

[0028] Furthermore, the diameter of the positioning hole is slightly larger than the diameter of the positioning post.

[0029] Furthermore, the top surface of the workbench protrudes from the bottom surface of the internal cavity of the container body.

[0030] Furthermore, the area of ​​the top surface of the workbench is smaller than the area of ​​the bottom surface thereof.

[0031] Furthermore, the workbench is a prism structure or a frustum structure.

[0032] Furthermore, the heating structure entirely covers the top surface of the workbench, the perovskite film to be tested is set on the heating structure, and the heating structure is also transparent.

[0033] Furthermore, the heating structure includes a heating pad.

[0034] Furthermore, the heating pad is a transparent heating pad. For example, the heating pad can be a heating pad formed of transparent materials such as ITO / PET, graphene / PET, etc.

[0035] Furthermore, an electrical connection line electrically connected to the heating pad passes through the container body and is arranged outside the container body.

[0036] Furthermore, the vacuum pumping mechanism includes a vacuum pump and a vacuum pump controller. The vacuum pump is electrically connected to the vacuum pump controller. The vacuum pump controller is at least used to adjust the working state and working parameters of the vacuum pump.

[0037] A second aspect of an embodiment of the present invention provides a perovskite in-situ absorption testing device, which includes: an ultraviolet-visible spectrophotometer device and a flash evaporation device for performing perovskite in-situ absorption testing, and the flash evaporation device as a whole can be placed in the testing area of ​​the ultraviolet-visible spectrophotometer device.

[0038] The following will further explain the technical solution, its implementation process and principles, etc. in conjunction with the accompanying drawings and specific implementation cases. Unless otherwise specified, the vacuum pump, vacuum pump controller, heating pad, pressure relief valve, etc. used in the embodiments of the present invention are all known in the art and can be purchased commercially. In addition, the ultraviolet-visible spectrophotometer device used in the embodiments of the present invention is also a device known in the art, and its specific model is not limited here.

[0039] In a more typical implementation case, a perovskite in-situ absorption test device includes an ultraviolet-visible spectrophotometer device and a flash evaporation device. The flash evaporation device is matched with the ultraviolet-visible spectrophotometer device. The flash evaporation device can be set in the test area of ​​the ultraviolet-visible spectrophotometer device. The flash evaporation device is used to carry a perovskite thin film wet film and flash evaporate and heat the perovskite thin film wet film. The ultraviolet-visible spectrophotometer device can perform in-situ absorption testing on the perovskite thin film wet film flash evaporation and heating process.

[0040] See also Figure 1The flash evaporation device cooperates with the ultraviolet-visible spectrophotometer equipment to realize the in-situ absorption test of the perovskite film. The flash evaporation device includes a transparent flash evaporation container (such as a flash evaporation box), a heating structure 300, a vacuum mechanism 500 and a pressure relief valve 400. The flash evaporation container has a closed working chamber inside, and the working chamber has a workbench for supporting the perovskite film. The heating structure 300 is arranged in the working chamber and is used to heat the perovskite film located on the workbench; the vacuum mechanism 500 is connected to the flash evaporation container and is used to form a vacuum environment in the working chamber and adjust the vacuum degree of the working chamber; the pressure relief valve 400 is arranged on the flash evaporation container and is used to adjust the pressure in the working chamber.

[0041] Specifically, the flash evaporation container is mainly used to provide a closed environment for flash evaporation, heating, and testing of the perovskite film. Of course, the flash evaporation container must also be able to accommodate the placement and removal of the perovskite film. More specifically, the flash evaporation container includes a container body 100 and a cover plate 200. The container body 100 has an open chamber inside. The cover plate 200 is detachably arranged at the opening of the container body 100 and encloses the container body 100 to form a closed working chamber. The workbench is located on the bottom surface of the chamber inside the container body 100. It can be understood that by opening the cover plate 200, the perovskite film can be placed and removed.

[0042] Specifically, when the cover plate 200 is placed on the container body 100, a seal must be achieved between the container body 100 and the cover plate 200 to ensure the airtightness of the working chamber. More specifically, the flash container also includes a flexible sealing ring 600, which is disposed on the container body 100 and / or the cover plate 200. The container body 100 and the cover plate 200 are sealed together by the sealing ring 600. When the cover plate 200 and the container body 100 are in a combined state, the sealing ring 600 located between the container body 100 and the cover plate 200 is in an elastically compressed state, and the sealing ring 600 is tightly fitted to the container body 100 and the cover plate 200.

[0043] Specifically, the cover plate 200 and the container body 100 are entirely transparent to enable observation and monitoring of the crystallization process of the perovskite film, while also allowing for in-situ testing of the perovskite film within the flash evaporation container using a UV-visible spectrophotometer. For example, the cover plate 200 and the container body 100 can be made of glass or acrylic.

[0044] Specifically, in order to facilitate the opening and closing operations of the cover 200, an operating handle 210 is fixed to the cover 200. The operating handle 210 can be designed according to specific usage scenarios, and its specific structure and size are not limited here.

[0045] More specifically, in order to improve the sealing effect between the container body 100 and the cover plate 200, a plurality of sealing rings 600 can be provided on the container body 100 and / or the cover plate 200, and the plurality of sealing rings 600 are spaced apart along the radial direction of the container body 100 or the cover plate 200. The plurality of spaced sealing rings 600 not only improve the sealing effect between the container body 100 and the cover plate 200, but also improve the stability of the sealing between the container body 100 and the cover plate 200, thereby avoiding the risk of sealing failure between the container body 100 and the cover plate 200.

[0046] More specifically, in order to further improve the sealing effect between the container body 100 and the cover plate 200, an annular first groove structure is further provided on the container body 100, and the first groove structure is arranged around the opening of the internal chamber of the container body 100. An annular second groove structure is also provided on the cover plate 200. A portion of the sealing ring 600 is arranged in one of the first groove structure and the second groove structure, and the other portion protrudes outside the first groove structure and the second groove structure. When the cover plate 200 and the container body 100 are in a combined state, the other portion of the sealing ring 600 is arranged in the other of the first groove structure and the first groove structure; when the sealing ring 600 is in a relaxed state, the thickness of the sealing ring 600 is greater than the sum of the depths of the first groove structure and the second groove structure. When the sealing ring 600 is compressed by the cover plate 200 and the container body 100, the thickness of the sealing ring 600 is slightly greater than or equal to the sum of the depths of the first groove structure and the second groove structure, and the sealing ring 600 completely fills the first groove structure and the second groove structure. By utilizing the flexibility of the sealing ring 600 and applying pressure to the sealing ring 600 to cause deformation, the sealing ring 600 adaptively fits tightly with the container body 100 and the cover plate 200, thereby improving the sealing effect and stability of the sealing state between the container body 100 and the cover plate 200.

[0047] In a typical embodiment, the cover plate 200 and the container body 100 are further provided with positioning posts and / or positioning holes. When the cover plate 200 and the container body 100 are in a combined state, the positioning posts on one of the cover plate 200 and the container body 100 can be correspondingly embedded in the positioning holes on the other, wherein the diameter of the positioning holes is slightly larger than the diameter of the positioning posts. It can be understood that the positioning posts and the positioning holes, as well as the sealing ring 600 and the first and second groove-like structures, all correspond to each other. When the positioning posts of the cover plate 200 and the container body 100 are correspondingly embedded in the positioning holes, the sealing ring 600 is also correspondingly embedded in the first and second groove-like structures.

[0048] Specifically, to facilitate the placement of the perovskite film, the top surface of the workbench protrudes from the bottom surface of the chamber inside the container body 100. At the same time, to facilitate the removal of the tested perovskite film, the area of ​​the top surface of the workbench is smaller than the area of ​​its bottom surface. More specifically, two oppositely arranged avoidance grooves can be provided on the side of the workbench. Through these avoidance grooves, the perovskite film on the top surface of the workbench can be more easily removed, thereby avoiding excessive restrictions on the removal of the perovskite film due to the limited space in the working chamber. Exemplarily, the workbench has a prism structure or a truncated cone structure.

[0049] Specifically, the heating structure 300 can be arranged on the top surface of the workbench, or it can be arranged as a whole with the top surface of the workbench. The heating structure 300 preferably covers the entire top surface of the workbench, and the perovskite film is arranged on the heating structure 300. More specifically, the heating structure 300 includes a heating pad and a heating switch electrically connected to the heating pad. The electrical connection line 310 electrically connected to the heating pad passes through the container body 100 and is electrically connected to the heating switch arranged on the outside of the container body 100. The working state and working parameters of the heating pad can be adjusted by the heating switch. More specifically, the heating pad is preferably a transparent heating pad. Exemplarily, the heating pad can be a heating pad formed of a transparent material such as ITO / PET, graphene / PET, etc. It should be noted that the electrical connection line 310 electrically connected to the heating pad passes through the container body 100 and remains sealed with the container body 100. Of course, the structure and method for achieving the sealing of the two are all known in the art and will not be repeated here.

[0050] Specifically, the vacuum pumping mechanism 500 includes a vacuum pump and a vacuum pump controller. The vacuum pump is electrically connected to the vacuum pump controller. The vacuum pump controller is used to adjust at least the operating state and operating parameters of the vacuum pump, primarily the vacuum pumping rate. Specifically, the pressure relief valve 400 itself has two operating states: open and closed. This is well known in the art, and its specific structure and operating mode are not limited or described herein.

[0051] In a typical implementation case, the process of performing a perovskite in-situ absorption test using the aforementioned perovskite in-situ absorption test device includes:

[0052] Will Figure 1 The flash evaporation device shown is placed in the UV-visible spectrophotometer and the test parameters are set;

[0053] The spin-coated / blade-coated / slit-coated perovskite film is attached to the transparent heating pad of the container body 100 of the flash evaporation device, with the transparent heating pad positioned facing the effective area of ​​the UV-visible spectrophotometer. The cover 200 is then placed on the container body 100, and the cover 200 and the container body 100 are kept fixed and sealed. The pressure relief valve 400 is closed, and the vacuum rate switch of the vacuum pump is adjusted to perform flash evaporation.

[0054] At the same time, the UV-visible spectrophotometer equipment was started to conduct multiple tests to obtain the absorption curves corresponding to different stages;

[0055] During or after the flash evaporation, the transparent heating pad is started to heat the perovskite film, and multiple tests are performed using a UV-visible spectrophotometer to obtain absorption curves corresponding to different stages of simultaneous flash evaporation and heating.

[0056] It should be noted that when the vacuum pump is in working state, the pressure in the working chamber decreases. Under the action of the air pressure difference between the inside and outside of the cover plate 200, the cover plate 200 will also be passively pressed on the container body 100, thereby compressing the sealing ring 600 between the two, thereby further maintaining the sealed connection between the two.

[0057] It should be understood that the above embodiments are merely illustrative of the technical concepts and features of the present invention. Their purpose is to enable those familiar with the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications based on the spirit of the present invention are intended to fall within the scope of protection of the present invention.

Claims

1. A flash evaporation device for performing in-situ perovskite absorption testing, characterized in that: include: A transparent flash evaporation container, wherein the flash evaporation container has a sealed working chamber inside, and the working chamber has a transparent working table for supporting the perovskite film; a heating structure, disposed in the working chamber and used to heat the perovskite film on the working table; a vacuum pumping mechanism connected to the flash evaporation vessel and used to create a vacuum environment in the working chamber and adjust the vacuum degree of the working chamber; A pressure relief valve is provided on the flash vessel and is used to adjust the pressure in the working chamber.

2. The flash evaporation device for performing perovskite in-situ absorption testing according to claim 1, characterized in that: The flash container includes a container body and a cover plate. The container body has an open chamber inside. The cover plate is detachably arranged at the opening of the container body and is enclosed with the container body to form a closed working chamber. The workbench is located on the bottom surface of the chamber inside the container body, wherein the cover plate and the container body are transparent as a whole.

3. The flash evaporation device for performing perovskite in-situ absorption testing according to claim 2, characterized in that: An operating handle is also fixed on the cover plate.

4. The flash evaporation device for performing perovskite in-situ absorption testing according to claim 2, characterized in that: The flash container further comprises a flexible sealing ring, which is provided on the container body and / or the cover plate. The container body and the cover plate are sealed together by the sealing ring. When the cover plate and the container body are in a combined state, the sealing ring between the container body and the cover plate is in an elastically compressed state, and the sealing ring is tightly fitted to the container body and the cover plate. And / or, the flash container further comprises a plurality of the sealing rings, and the plurality of sealing rings are arranged at intervals along the radial direction of the container body or the cover plate.

5. The flash evaporation device for performing perovskite in-situ absorption testing according to claim 4, characterized in that: The container body is further provided with an annular first groove-shaped structure, which is arranged around the opening of the internal chamber of the container body. The cover plate is further provided with an annular second groove-shaped structure. A portion of the sealing ring is arranged in one of the first groove-shaped structure and the second groove-shaped structure, and the other portion protrudes outside the first groove-shaped structure and the second groove-shaped structure. When the cover plate and the container body are in a combined state, the other portion of the sealing ring is arranged in the other of the first groove-shaped structure and the first groove structure. When the sealing ring is in a relaxed state, the thickness of the sealing ring is greater than the sum of the depths of the first groove-like structure and the second groove-like structure. When the sealing ring is in a compressed state by the cover plate and the container body, the thickness of the sealing ring is slightly greater than or equal to the sum of the depths of the first groove-like structure and the second groove-like structure, and the sealing ring completely fills the first groove-like structure and the second groove-like structure.

6. The flash evaporation device for performing perovskite in-situ absorption testing according to claim 2, characterized in that: Positioning posts and / or positioning holes are also provided on the cover plate and the container body. When the cover plate and the container body are in a combined state, the positioning posts on one of the cover plate and the container body can be correspondingly embedded in the positioning holes on the other.

7. The flash evaporation device for performing perovskite in-situ absorption testing according to claim 2, characterized in that: The top surface of the workbench protrudes from the bottom surface of the inner cavity of the container body; And / or, the area of ​​the top surface of the workbench is smaller than the area of ​​the bottom surface thereof; And / or, the workbench is a prism structure or a frustum structure.

8. The flash evaporation device for performing perovskite in-situ absorption testing according to claim 2 or 7, characterized in that: The heating structure entirely covers the top surface of the workbench, and the perovskite film to be tested is placed on the heating structure, and the heating structure is also transparent; and / or, the heating structure comprises a heating pad; and / or, the heating pad is a transparent heating pad; And / or, an electrical connection line electrically connected to the heating pad passes through the container body and is arranged outside the container body.

9. The flash evaporation device for performing perovskite in-situ absorption testing according to claim 2 or 7, characterized in that: The vacuum pumping mechanism includes a vacuum pump and a vacuum pump controller. The vacuum pump is electrically connected to the vacuum pump controller. The vacuum pump controller is at least used to adjust the working state and working parameters of the vacuum pump.

10. A perovskite in-situ absorption test device, characterized in that: include: An ultraviolet-visible spectrophotometer and a flash evaporation device for performing in-situ perovskite absorption testing according to any one of claims 1 to 9, wherein the flash evaporation device as a whole can be placed in the testing area of ​​the ultraviolet-visible spectrophotometer.

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