CN218502487U

CN218502487U - Perovskite film device of brushing

Info

Publication number: CN218502487U
Application number: CN202222886726.2U
Authority: CN
Inventors: 请求不公布姓名
Original assignee: Huabi New Energy Technology Research Suzhou Co ltd
Current assignee: Huabi Guangneng Technology Suzhou Co ltd
Priority date: 2022-10-31
Filing date: 2022-10-31
Publication date: 2023-02-21
Anticipated expiration: 2032-10-31

Abstract

The utility model provides a perovskite film device of brushing relates to coating technical field. The device comprises a film coating platform for placing a substrate, a processing system and a movement control system, wherein the processing system and the movement control system are arranged above the film coating platform; the movement control system is used for controlling the movement of the processing system; the processing system comprises a brushing unit, an intermediate processing unit and an air knife unit which are sequentially arranged along the direction of brushing the substrate; wherein the brushing unit is used for brushing the solution on the substrate; the intermediate treatment unit is used for spreading and leveling the solution which is coated on the substrate by the coating unit; the air knife unit is used for blowing air to the substrate. The device is suitable for the brushing preparation process of the perovskite solar cell, can reduce the generation of brushing lines, improves the uniformity of the thickness of the film, and has the advantages of improving the quality of the perovskite crystal film and further optimizing the performance of the cell.

Description

Perovskite film device of brushing

Technical Field

The utility model belongs to the technical field of the coating, in particular to perovskite film device of brushing.

Background

Perovskite is used as an artificial synthetic material, and after the perovskite is firstly tried to be applied to the field of photovoltaic power generation in 2009, the perovskite has become a high-potential choice capable of replacing a silicon battery in a new-generation photovoltaic material due to excellent photoelectric conversion efficiency, low raw material cost and high energy density.

In recent years, research on metal halide hybrid perovskite solar cells has been spread all over the world, and perovskite solar cells are solar cells using perovskite-type organic metal halide semiconductors as light absorbing materials, and belong to third generation solar cells, also referred to as new concept solar cells.

At present, the manufacturing process of the perovskite solar cell comprises methods such as spin coating, blade coating, brush coating, spray coating and the like. The most promising of these is the brush coating process.

The coating method is characterized in that a solution is injected into the cavity to soak the lower brush head, the brush head is coated on the surface in a single direction at a certain speed, and the solution is uniformly coated on the surface of a coated object.

For example, CN113968983A discloses a layer-by-layer brush coating preparation method of a thin film, which is to uniformly brush coat each liquid on a functionalized substrate by layer-by-layer brush coating of a metal salt solution, a solvent and an organic ligand solution to obtain the thin film.

The brush coating method can be suitable for perovskite solar cells of various substrates, is not limited by the size of a sample compared with other coating processes and methods, and is simple in preparation process, low in device cost, high in reliability and suitable for large-area popularization.

However, there are also some drawbacks in the preparation of the transport/perovskite/electrode layers of perovskite solar cells using the brush coating process.

Especially, the brush head is needed to be used in the brush coating method, because the existence of the brush hair is influenced by the material of the brush hair, the service life and other factors, the brush head is difficult to avoid brush lines among the brush hair in the brush coating process, the thickness of a thin film is uneven, the subsequent solar cell efficiency is low, the reliability is reduced, and the like, and the overall performance of a product is greatly influenced.

In summary, how to provide a perovskite thin film brushing device capable of reducing the generation of brushing stripes is a technical problem which needs to be solved at present.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the not enough of prior art, provide a perovskite film device of brushing, can spread the solution of brushing on the basement and smooth to reduce the production of brush line.

The utility model provides a perovskite film brushing device, which comprises a film coating platform for placing a substrate, a processing system and a mobile control system, wherein the processing system and the mobile control system are arranged above the film coating platform;

the movement control system is used for controlling the movement of the processing system;

the processing system comprises a brushing unit, an intermediate processing unit and an air knife unit which are sequentially arranged along the direction of brushing the substrate; wherein the brushing unit is used for brushing the solution on the substrate; the intermediate treatment unit is used for spreading and leveling the solution which is coated on the substrate by the coating unit; the air knife unit is used for blowing air towards the substrate.

Further, the brushing unit comprises a brushing piece, a liquid storage bin and a liquid injection structure for connecting the brushing piece and the liquid storage bin;

wherein the liquid storage bin is used for containing liquid; through the liquid injection assembly, liquid in the liquid storage bin can be moved to the brushing piece;

the brushing piece is used for brushing liquid on the substrate.

Further, the brush member includes a brush and/or a roller brush.

Further, the liquid injection structure comprises a pump and a buffer cavity with a cavity, and liquid in the liquid storage bin is pumped by the pump;

the buffer cavity is used for containing the liquid sucked by the pump.

Furthermore, annotate the liquid structure still including the permeation element that retards that is linked together with the cushion chamber, be provided with a plurality of through-holes that run through the permeation element that retards on the permeation element that retards.

Further, the intermediate treatment unit comprises a soft film without adsorbability, and the brushed wet film is spread through the soft film.

Further, the movement control system further comprises a height adjustment structure for adjusting the height of the intermediate processing unit.

Further, the air knife unit comprises a main air knife and an air supply device which are connected with each other through an air knife air supply pipeline, and the air supply device is used for supplying air to the main air knife.

Further, a heating structure for heating the air is arranged inside the main air knife and/or at the air outlet.

The utility model discloses owing to adopt above technical scheme, compare with prior art, as the example, have following advantage and positive effect:

by sequentially arranging the brushing unit, the intermediate processing unit and the air knife unit along the direction of brushing the substrate, the technical process of firstly brushing the solution on the substrate, then spreading and leveling the solution brushed on the substrate and then drying the solution on the substrate is implemented, so that the generation of brushing lines in the brushing method is reduced, the uniformity of the thickness of the film is improved, and the perovskite crystal film has the advantages of improving the quality of the perovskite crystal film and further optimizing the performance of the battery. Besides, the device is simple in overall structure, convenient to operate and easy to popularize and maintain in the later period.

Drawings

Fig. 1 is a schematic structural diagram of a perovskite thin film brushing device provided by the present invention.

Fig. 2 is a schematic structural view of the liquid supply structure provided by the present invention.

Fig. 3 is a schematic structural view of the main air knife provided by the present invention.

Description of reference numerals:

the perovskite thin film brushing device 100, the film coating platform 110, the moving track 111, the motor 120, the pipeline frame 130, the pump liquid pipeline 131 and the controller 140;

a movement control system 200, a first moving device 210, a second moving device 220, a third moving device 230, a height adjusting structure 240;

the brush coating unit 300, the brush coating piece 310, the brush 311, the slow penetration piece 312, the buffer cavity 313, the through hole 314, the liquid storage bin 320 and the pump 330;

an intermediate processing unit 400;

the air knife unit 500, the main air knife 510, the heating structure 511, the air inlet 512, the air outlet 513, the air knife air supply pipeline 520 and the air supply device 530;

10 brush direction.

Detailed Description

The technical solution disclosed in the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments. It should be noted that technical features or combinations of technical features described in the following embodiments should not be considered as being isolated, and they may be combined with each other to achieve better technical effects. In the drawings of the embodiments described below, the same reference numerals appearing in the various drawings denote the same features or components, and may be applied to different embodiments. Thus, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

It should be noted that the structures, ratios, sizes, etc. shown in the drawings of the present specification are only used for matching with the contents disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, and any modifications of the structures, changes of the ratio relationships, or adjustments of the sizes should fall within the scope that the technical contents disclosed in the present invention can cover without affecting the functions and purposes that the present invention can achieve. The scope of the preferred embodiments of the present invention includes other implementations in which functions may be performed out of the order described or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present invention.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

The utility model provides a perovskite film device of brushing 100, as shown in FIG. 1, including the platform 110 of filming that is used for putting the basement, still including locating the processing system and the mobile control system 200 of filming the platform top.

The processing system includes a brushing unit 300, an intermediate treatment unit 400, and an air knife unit 500, which are sequentially disposed in a direction of brushing a substrate.

In this embodiment, the movement control system includes a first moving device 210, a second moving device 220, and a third moving device 230, which are respectively connected to the brushing unit 300, the intermediate treatment unit 400, and the air knife unit 500, for controlling the movement of the processing system.

The movement control system includes moving rails 111 disposed at both sides of the coating platform 110. The first moving device 210, the second moving device 220, and the third moving device 230 are respectively connected to the moving rail 111, and can move along the moving rail, driven by the motor 120, and controlled by the controller 140.

The brush unit 300 is used to brush a solution on a substrate.

The brushing unit comprises a brushing piece 310, a liquid storage bin 320 and a liquid injection structure for connecting the brushing piece and the liquid storage bin.

Wherein, the liquid storage bin is used for containing liquid.

In this embodiment, the liquid storage chamber 320 is connected to the liquid injection structure through the pipe frame 130.

The priming structure includes a pump 330 and a buffer chamber 313 having a cavity as shown in fig. 2.

And liquid in the liquid storage bin is pumped by the pump. Optionally, the pump is a micro metering pump, and can quantitatively suck the perovskite precursor liquid.

The perovskite precursor liquid in the reservoir 320 is moved to the buffer chamber 313 through the pump liquid pipe 131 built in the pipe frame 130, and the buffer chamber is used for accommodating the liquid sucked by the pump.

Preferably, the liquid injection structure further comprises a retarding penetration member 312 communicated with the buffer cavity, and the retarding penetration member is provided with a plurality of through holes 314 penetrating through the retarding penetration member.

By way of example and not limitation, the through holes may be configured as holes with smaller apertures, or holes with wider top and narrower bottom, so as to achieve the effect of reducing the liquid flow rate per unit time, thereby enabling the perovskite precursor liquid to slowly seep to the brush-coating member through the slow-speed penetration member.

The brushing piece is used for brushing liquid on the substrate. Preferably, the brush member 310 includes a brush and/or a roller brush.

During specific implementation, the first moving device is controlled by the controller to move on the rail, so that the brushing unit connected with the first moving device is driven to move above the film coating platform along a brushing direction, and the brushing piece brushes the perovskite precursor liquid conveyed by the liquid injection structure on the substrate on the film coating platform to form the perovskite thin film.

The intermediate treatment unit 400 is used to spread out the solution applied by the brush unit to the substrate.

Preferably, the intermediate treatment unit comprises a non-absorbent flexible membrane through which the brushed wet membrane is spread.

By way of example and not limitation, the flexible membrane is a Polyimide (PI) membrane, a Polytetrafluoroethylene (PTFE) membrane, or a silicone sheet.

After the step of brushing the solution on the surface of the substrate by the brushing structure is finished, the controller controls the second moving device to move, so that the intermediate processing unit connected with the second moving device is driven to move to the position above the substrate.

Preferably, the movement control system further comprises a height adjustment structure 240 for adjusting the height of the intermediate processing unit.

By way of example and not limitation, the height adjusting structure may include a plurality of telescoping blocks nested in one another, and the longitudinal length of the height adjusting structure is changed by relative telescoping between the telescoping blocks, so as to change the relative distance between the intermediate processing unit connected with the height adjusting structure and the substrate on the film coating platform, and the intermediate processing unit is moved away from or close to the surface of the substrate.

Or the height adjusting structure comprises a base with a sliding groove and a sliding block capable of sliding along the sliding groove, and the sliding block moves in the sliding groove to drive the middle processing unit to lift.

Thereby this device passes through altitude mixture control structure cooperation motor control to realize comparatively accurate altitude mixture control.

After the intermediate processing unit approaches the surface of the substrate, the soft film without adsorbability contacts the surface of the substrate, and the perovskite precursor liquid is uniformly spread through capillary action, so that the lines are smoothed, the perovskite film is smooth, and the consistency of the film forming thickness is promoted.

After the spreading of the solution on the substrate by the intermediate processing unit is completed, the controller controls the third moving device to move, so as to drive the air knife unit 500 connected with the third moving device to move above the perovskite thin film.

The air knife unit is used for blowing air towards the substrate. The air knife unit includes a main air knife 510 and an air supply device 530 connected to each other through an air knife air supply duct 520. The air supply device is used for supplying air to the main air knife, the air knife air supply pipeline 520 is arranged in the pipeline frame, and the air reaches the main air knife through the air knife air supply pipeline 520 and is sprayed out from the air outlet 513 of the main air knife to reach the surface of the film.

Preferably, a heating structure 511 for heating the air is disposed inside the main air blade 510 and/or at the air outlet 513.

By way of example and not limitation, as shown in fig. 3, heating structures are disposed on both sides of the inner wall of the main air blade adjacent to the air inlet 512.

Of course, other arrangements are also possible, for example, the heating structure may also be arranged at the positions adjacent to the air outlet on both sides of the inner wall of the main air knife, or at the position of the air outlet outside the main air knife.

The heated gas was blown out by the air knife unit to preliminarily dry the perovskite layer to form an active layer of the intermediate phase.

Terms like "comprising" and "comprises" should be interpreted as inclusive or open-ended, rather than exclusive or closed-ended, within the scope of the intended protection of the present disclosure, unless explicitly defined to the contrary. All technical, scientific, or other terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs unless defined otherwise. Common terms found in dictionaries should not be interpreted too ideally or too realistically in the context of related art documents unless the present disclosure expressly limits them to that.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A perovskite film brushing device comprises a film coating platform for placing a substrate, and is characterized in that: the device also comprises a processing system and a movement control system which are arranged above the film coating platform;

2. The perovskite thin film brush coating apparatus of claim 1, wherein: the brushing unit comprises a brushing part, a liquid storage bin and a liquid injection structure for connecting the brushing part and the liquid storage bin;

wherein the liquid storage bin is used for containing liquid; through the liquid injection structure, the liquid in the liquid storage bin can be moved to the brushing part;

the brushing piece is used for brushing liquid on the substrate.

3. The perovskite thin film brushing device according to claim 2, wherein: the brush member includes a brush and/or a roller brush.

4. The perovskite thin film brushing device according to claim 2, wherein: the liquid injection structure comprises a pump and a buffer cavity with a cavity, and liquid in the liquid storage bin is pumped by the pump;

the buffer cavity is used for containing the liquid sucked by the pump.

5. The perovskite thin film brushing device according to claim 4, wherein:

annotate the liquid structure still including the permeation element that retards that is linked together with the cushion chamber, be provided with a plurality of through-holes that run through the permeation element that retards on the permeation element.

6. The perovskite thin film brush coating apparatus of claim 1, wherein: the intermediate treatment unit comprises a nonabsorbent soft film, and the wet film after brushing is spread through the soft film.

7. The perovskite thin film brush coating apparatus of claim 1, wherein: the movement control system further comprises a height adjustment structure for adjusting the height of the intermediate processing unit.

8. The perovskite thin film brush coating apparatus of claim 1, wherein: the air knife unit comprises a main air knife and an air supply device which are connected with each other through an air knife air supply pipeline, and the air supply device is used for supplying air to the main air knife.

9. The perovskite thin film brush coating apparatus of claim 8, wherein: and a heating structure for heating gas is arranged in the main air knife and/or at the gas outlet.