Quantum dot solar cell preparation with evaporation oven

Abstract

The utility model provides a kind of quantum dot solar cell preparation is steamed with box, belong to quantum dot solar cell field.The nitrogen single consumption of existing steamed with box is high, and the problem of poor oxygen-free environment stability is solved.A kind of quantum dot solar cell preparation is steamed with box, is provided with cabinet and is set in the sealing door of cabinet opening side for opening or closing opening side, further includes: pressurizing cavity, is connected with cabinet;Pressurizing part, it is set in pressurizing cavity, for in drive part drive action under action pressurizing in cabinet and form the air flow that blows to cabinet opening side;Inert gas inlet part, outlet end is set in cabinet, for inlet inert gas;Rotational flow part, it is set in cabinet, for the air flow formed by pressurizing part becomes rotational flow.It is mainly used in the surface passivation / ligand exchange process of quantum dot solar cell.

Description

Technical Field

[0001] This invention belongs to the field of quantum dot solar cells, and in particular relates to a steam oven for preparing quantum dot solar cells. Background Technology

[0002] Although quantum dot solar cells have advantages such as tunable spectrum, solution processing, and potential multiexciton effects, they still face some challenges in industrialization.

[0003] Surface passivation / ligand exchange processes require the use of a steam oven, which needs an oxygen-free environment of <50 ppm. Existing ovens experience an oxygen explosion of up to 500 ppm when the door is opened, leading to product oxidation and quality degradation. Current technologies primarily employ high-speed nitrogen curtains or micro-positive pressure methods for treatment; however, high-speed nitrogen curtains consume a large amount of nitrogen, requiring 1200 L / min. -1 The instantaneous flow rate can reach a peak pressure of 80–100 ppm, resulting in high nitrogen consumption. Furthermore, the slightly positive pressure method creates a 0.5-second negative pressure transient when the door is opened, making it difficult to guarantee the stability of the oxygen-free environment. Summary of the Invention

[0004] In view of this, the present invention aims to propose a steaming box for the preparation of quantum dot solar cells, so as to solve the problems of high nitrogen consumption and poor stability of oxygen-free environment in existing steaming boxes.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a steaming box for preparing quantum dot solar cells, comprising a cabinet and a sealing door located on the opening side of the cabinet for opening or closing the opening, and further comprising: The pressurization chamber is connected to the cabinet. The pressurizing unit, located inside the pressurizing chamber, is used to pressurize the cabinet body under the driving action of the driving unit and form an airflow that blows towards the opening side of the cabinet. The inert gas inlet is located inside the cabinet and is used to introduce inert gas. The vortex section, located inside the cabinet, is used to transform the airflow generated by the pressurization section into a vortex.

[0006] Furthermore, the cabinet body is rotatably connected to the sealed door and is locked or opened by a locking assembly, and a handle is provided on one end face of the sealed door.

[0007] Furthermore, the pressurizing part is a piston with threads on its peripheral wall, and several gas acceleration parts are provided on the end face near the opening of the cabinet to accelerate the gas when the pressurizing part rotates.

[0008] Furthermore, the pressurization chamber is provided with threads that mate with the piston.

[0009] Furthermore, the driving part is a rotating shaft with several protrusions on it.

[0010] Furthermore, the pressurizing part is provided with a mating part that engages with the rotating shaft and all the protrusions.

[0011] Furthermore, a pipeline control unit is provided at the outlet end of the inert gas inlet to control the gas flow rate and whether the gas is ejected.

[0012] Furthermore, the cabinet is provided with several support parts arranged at intervals along the vertical direction.

[0013] Furthermore, the swirling section is annular, and the inner wall of the annulus is provided with several swirling vanes that are inclined to form the airflow direction with the pressurization section.

[0014] Furthermore, the tilt angle of the inclined swirl vanes is 15-25 degrees.

[0015] Compared with the prior art, the beneficial effects of this utility model are: Before the door is opened, the pressure-increasing unit is activated by the drive unit, which increases the instantaneous pressure inside the cabinet and creates an airflow towards the opening. This airflow forms a vortex as it passes through the vortex unit, causing the airflow inside the cabinet to rotate and counteract the momentum of the flow towards the opening. When the door is opened, the increased instantaneous pressure counteracts the slight negative pressure created by the door gap, ensuring that oxygen is not drawn into the cabinet, which could lead to an unstable inert gas environment and product quality issues. At the same time, the inert gas inlet continuously supplies inert gas into the steamer, maintaining a positive pressure environment inside the cabinet and preventing external gas from entering from the opening, further ensuring the stability of the gas environment. The rotating airflow also slows down the tendency of gas to flow outwards towards the opening, mitigating the inert gas loss caused by the slight positive pressure and reducing the amount of inert gas consumed. Attached Figure Description

[0016] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings: Figure 1 This is a schematic diagram of the structure of a steam oven for preparing quantum dot solar cells according to the present invention; Figure 2 The present utility model Figure 1 A magnified view of part A; Figure 3 This is a side view of the drive unit described in this utility model; Figure 4 This is a side view of the pressurizing part described in this utility model.

[0017] Cabinet body 1; Sealed door 2; Locking assembly 3; Handle 4; Support part 5; Pressurization part 6; Gas acceleration part 7; Drive part 8; Fitting part 9; Inert gas inlet part 10; Pipeline control part 11; Protrusion 12; Swirl part 13; Pressurization chamber 14. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present utility model can be combined with each other, and the described embodiments are only some embodiments of the present utility model, not all embodiments.

[0019] It should be noted that the descriptions of "left," "right," "left side," "right side," "upper part," "lower part," "top," and "bottom" in this utility model are defined based on the orientation or positional relationships shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for simplifying the description, and are not intended to indicate or imply that the described structure must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0020] In the description of this utility model, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] Referring to the accompanying drawings, this embodiment describes a steam oven for preparing quantum dot solar cells. It includes a cabinet 1 and a sealing door 2 located on the opening side of the cabinet 1 for opening or closing the opening. The sealing door 2 is hinged to the cabinet 1 and can be rotated relative to it for opening. Other door opening methods can also be selected according to actual needs. The oven also includes: The pressurizing chamber 14 is connected to the cabinet 1. The pressurizing chamber 14 is a barrel-shaped cavity with one open side and one closed side. The open side has an internal thread, and the cabinet 1 has an external thread that mates with this open thread. The pressurizing chamber 14 is connected to the cabinet 1 via a threaded connection, and a corresponding sealing structure is provided to ensure airtightness. The sealing structure adopts existing technology and is not specifically limited; any structure that can guarantee a sealing effect can be used in this application. A bearing seat is provided at the closed end of the pressurizing chamber 14 to provide rotational support for the drive unit 8.

[0022] The pressurizing unit 6, located within the pressurizing chamber 14, is activated by the drive unit 8 to pressurize the interior of the cabinet 1 and generate an airflow that blows towards the opening of the cabinet 1. The purpose of this pressurizing action is to balance the slight negative pressure generated when the door is opened. The drive unit 8 is specifically configured as a rotating shaft and connected to a corresponding servo motor via a coupling. To ensure a smooth return stroke after pressurization, the pressurizing chamber 14 can be equipped with pressure-balancing openings (not shown in the figure). These openings can be positioned and connected to the appropriate air passages based on the actual situation.

[0023] The inert gas inlet 10 has its outlet end located inside the cabinet 1 for introducing inert gas. The swirling section 13, located inside the cabinet 1, transforms the airflow generated by the pressurization section 6 into a swirling flow. The swirling flow ensures that the internal gas maintains a certain rotational state. Thus, when the door is opened, the positive pressure inside the cabinet 1 causes the gas to move outward, and the tangential velocity of the rotation can, to some extent, counteract the axial velocity, thereby reducing the speed at which the gas escapes outward and reducing the amount of nitrogen lost.

[0024] In this embodiment, the cabinet 1 is rotatably connected to the sealed door 2 and is locked or opened by the locking assembly 3. A handle 4 is provided on one end face of the sealed door 2. The locking assembly 3 is mainly designed to ensure the tightness of the connection between the cabinet 1 and the sealed door 2 during material processing, preventing gas escape. The locking assembly 3 can be reasonably set according to the opening method, and no specific limitation is made here. The handle 4 can improve the convenience of opening the door. Depending on the specifications of the steam oven, when the processing volume is large and reaches an industrial scale, the steam oven is generally set in the form of a steam oven, and the handle 4 is generally replaced by a mechanical drive type, which should be reasonably set according to the actual situation.

[0025] In this embodiment, the pressurizing part 6 is a piston with threads on its peripheral wall. Several gas accelerating parts 7 are provided on the end face near the opening of the cabinet 1 to accelerate the gas when the pressurizing part 6 rotates. The pressurizing chamber 14 has threads that mate with the piston. The driving part 8 is a rotating shaft with several protrusions 12. The pressurizing part 6 has mating parts 9 that mate with the rotating shaft and all the protrusions 12. With the above-described configuration, the pressurizing part 6 is designed as a piston with threads. This allows the piston to undergo axial pressurization and rotation when driven by the drive part 8. When the drive part 8 rotates, it drives the pressurizing part 6 to rotate via the protrusion 12. During rotation, the threaded engagement causes the pressurizing part 6 to move axially. The mating part 9 is a through-groove with a shape and size adapted to the drive part 8 and the protrusion, and is reliably lubricated, ensuring smooth and reliable axial movement and rotation. This guarantees that the rotation of the drive part 8 can drive the pressurizing part 6 to rotate and move axially, thereby pressurizing the interior of the cabinet 1. Simultaneously, an airflow is generated by the gas acceleration part 7, which is a blade with a certain angle of attack. The angle of attack can be set to 45 degrees.

[0026] In this embodiment, a pipeline control unit 11 is provided at the outlet end of the inert gas inlet 10 to control the gas flow rate and whether the gas is ejected. Specifically, the pipeline control unit 11 is a flow valve that controls whether the inert gas is ejected and the ejection speed. The inlet end of the inert gas inlet 10 is connected to a gas cylinder with a pump or other gas supply equipment; the gas is nitrogen.

[0027] In this embodiment, the cabinet 1 is provided with a plurality of support parts 5 arranged at intervals along the vertical direction. The support parts 5 are support frames used to place quantum dot products.

[0028] In this embodiment, the swirling section 13 is annular, and several swirling vanes are arranged on the inner wall of the ring at a certain angle to the airflow direction formed by the pressurizing section 6. The angle is 15-25 degrees. This arrangement enables the flowing gas to form a swirling flow, thereby ensuring that the gas inside the cabinet 1 forms a swirling flow with a certain tangential velocity, thus reducing the velocity of the axially flowing gas towards the opening side of the cabinet 1 and reducing gas loss.

[0029] In use, before opening the door to retrieve or place products, the drive unit 8 rotates, and through the cooperation of the protrusions, the pressurizing unit 6 rotates. During the rotation of the pressurizing unit 6, it will perform axial movement, thereby pressurizing the inside of the cabinet 1 and forming gas flow. The gas flow will form a vortex through the action of the vortex unit 13, so that the gas inside the cabinet 1 maintains a certain rotational momentum. Thus, when the door is opened, on the one hand, it balances the slight negative pressure when the door is opened, and on the other hand, it reduces the escape speed of the gas outward, thereby reducing the amount of gas loss and ensuring the stability of the inert gas environment inside the cabinet 1.

[0030] The embodiments of the present invention disclosed above are merely illustrative of the present invention. The embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific implementations described. Many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention.

Claims

1. A steam oven for preparing quantum dot solar cells, comprising a cabinet (1) and a sealing door (2) disposed on the opening side of the cabinet (1) for opening or closing the opening side, characterized in that, Also includes: The pressurized chamber (14) is connected to the cabinet (1); The pressurizing part (6) is installed in the pressurizing chamber (14) and is used to pressurize the cabinet (1) under the driving action of the driving part (8) and form an airflow that blows towards the opening side of the cabinet (1); An inert gas inlet (10) has its outlet end located inside the cabinet (1) for introducing inert gas; The vortex section (13) is installed inside the cabinet (1) and is used to transform the airflow formed by the pressurization section (6) into a vortex.

2. The steam oven for preparing quantum dot solar cells according to claim 1, characterized in that: The cabinet (1) is rotatably connected to the sealed door (2) and is locked or opened by the locking assembly (3). A handle (4) is provided on one end face of the sealed door (2).

3. The steam oven for preparing quantum dot solar cells according to claim 1, characterized in that: The pressurizing part (6) is a piston, and its peripheral wall is threaded. Several gas acceleration parts (7) are provided on the end face near the opening side of the cabinet (1) to accelerate the gas when the pressurizing part (6) rotates.

4. The steam oven for preparing quantum dot solar cells according to claim 3, characterized in that: The pressurization chamber (14) is provided with threads that cooperate with the piston.

5. A steam oven for preparing quantum dot solar cells according to claim 3 or 4, characterized in that: The drive unit (8) is a rotating shaft with several protrusions (12) on it.

6. The steam oven for preparing quantum dot solar cells according to claim 5, characterized in that: The pressurizing part (6) is provided with a mating part (9) that mates with the rotating shaft and all the protrusions (12).

7. A steam oven for preparing quantum dot solar cells according to claim 1, 2, 3, 4 or 6, characterized in that: The outlet end of the inert gas inlet (10) is provided with a pipeline control unit (11) for controlling the gas flow rate and whether the gas is ejected.

8. The steam oven for preparing quantum dot solar cells according to claim 7, characterized in that: The cabinet (1) is provided with several support parts (5) arranged at intervals along the vertical direction.

9. A steam oven for preparing quantum dot solar cells according to claim 1, 2, 3, 4, 6 or 8, characterized in that: The swirling section (13) is annular, and a number of swirling vanes are provided on the inner wall of the ring, which are inclined to the airflow direction of the pressurizing section (6).

10. A steam oven for preparing quantum dot solar cells according to claim 9, characterized in that: The tilt angle of the inclined swirl vanes is 15-25 degrees.

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