CN218868608U - Air knife assembly convenient for large-area perovskite film layer high-temperature annealing - Google Patents
Air knife assembly convenient for large-area perovskite film layer high-temperature annealing Download PDFInfo
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- CN218868608U CN218868608U CN202221981922.1U CN202221981922U CN218868608U CN 218868608 U CN218868608 U CN 218868608U CN 202221981922 U CN202221981922 U CN 202221981922U CN 218868608 U CN218868608 U CN 218868608U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/549—Organic PV cells
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Abstract
The utility model discloses an air knife subassembly convenient to annealing of large tracts of land perovskite rete high temperature, including mixing the pressurization gas cylinder, a plurality of switch valve and quality sensor, gas heating device, a plurality of air knife and glass substrate, it has compressed air inlet and solvent gas air inlet to mix the pressurization gas cylinder intercommunication, compressed air inlet UNICOM has switch valve and quality sensor, carry mixed gas for gas heating device, gas heating device is provided with air intake and air outlet, the opposition terminal surface of air outlet is provided with heating pipe and thermocouple, the air knife is just peeling off the perovskite dry film on the base plate, blow off the mist, this air knife subassembly carries out secondary treatment simultaneously to high temperature annealing's perovskite dry film, extract out the volatilization with the interior remaining non-volatile solvent of dry film with higher speed, avoid the volatile perovskite surface resolubilization crystallization that leads to with the air condensation of solvent, thereby obtain more even perovskite film, improve the uniformity of perovskite crystallization, promote perovskite film forming stability.
Description
Technical Field
The utility model relates to a photovoltaic module product preparation technical field, concretely relates to defect detecting equipment suitable for perovskite photovoltaic module.
Background
Perovskite Solar Cells (PSC) are a type of solar cell that includes perovskite-structured compounds, most commonly hybrid organic-inorganic lead or tin halide-based materials, as light-harvesting active layers. Perovskite materials, such as lead methylammonium halides and cesium all-inorganic halides, are inexpensive to produce and easy to manufacture, and solar cell efficiencies of devices using these materials have increased from 3.8% to 25.5%, with perovskite solar cells being the fastest growing solar technology. Perovskite solar cells have the potential to achieve higher efficiencies and extremely low production costs. However, there are still many problems to be overcome if large-area production is to be realized. The preparation of uniform, continuous, dense, highly crystalline perovskite film layers is one of the most important issues.
The current process for preparing the large-area perovskite film layer mainly comprises the following steps:
1) Coating the perovskite material to form a liquid film by using a coating method;
2) Drying the liquid film by using an air knife blowing method or a vacuum blowing method to form a dry film;
3) Carrying out high-temperature annealing on the obtained dry film to form a perovskite film;
the perovskite thin film can be rapidly obtained through the process, but after the perovskite thin film is dried through an air knife, in the high-temperature annealing process, a part of solvent (with the boiling point of 150-250 ℃) volatilized in the dried film is condensed and falls back to the surface of the thin film due to air (with the boiling point of 20-25 ℃), so that the surface of the perovskite thin film is redissolved and crystallized and is uncontrollable and uneven crystallization.
The perovskite surface thin film is uneven due to multiple nucleation and crystallization on the surface of the perovskite thin film, the film forming quality is general, and the photoelectric conversion efficiency of the perovskite solar cell is influenced; when a large-area perovskite film is prepared, the secondary nucleation and crystallization on the surface are uncontrollable and irregular, so that the product repeatability is poor and the flow line production is difficult.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the purpose: in view of the problems that in the prior art, a part of solvent volatilized in a dry film in the perovskite film preparation is condensed by air and falls back to the surface of the film, so that the surface of the perovskite film is redissolved and crystallized, and uncontrollable and uneven crystallization is caused, and the adverse effects of poor product repeatability and difficult assembly line production are caused due to the influence on the photoelectric conversion efficiency of a perovskite solar cell caused by general film forming quality.
The technical scheme adopted for solving the problems is as follows:
an air knife component convenient for large-area perovskite film high-temperature annealing comprises a mixed pressurized gas cylinder, a plurality of groups of switch valves and mass sensors, a gas heating device, a plurality of air knives and a glass substrate,
the mixed pressurized gas cylinder is communicated with a compressed gas inlet and a solvent gas inlet, the compressed gas inlet is communicated with a switch valve and a mass sensor in series, a certain amount of compressed air or high-purity nitrogen is injected into the compressed gas inlet, the solvent gas inlet is communicated with a switch valve and a mass sensor in series, a certain amount of one or more solvent gases are injected into the mixed pressurized gas cylinder through the switch valve and the mass sensor, the mixed gas is pressurized and fully mixed and then is conveyed to a gas heating device,
the gas heating device is provided with an air inlet and an air outlet, the gas heating device is cylindrical, the air inlet is arranged on the side wall of the cylinder and is arranged along the tangential direction of the inner wall of the cylinder, so that the entering high-pressure mixed gas can spirally flow on the inner wall of the cylinder and is blown out from the axially arranged air outlet, the opposite end faces of the air outlet are provided with a U-shaped heating pipe and a thermocouple, the temperature change in the gas heating device is monitored and fed back through the temperature measurement of the thermocouple, the heating temperature of the U-shaped heating pipe is timely adjusted, and the mixed gas heated to the required temperature is guided to a plurality of air knives through an air pipe and connecting valves,
and the lower end gas outlet of the air knife is linear and is opposite to the perovskite dry film annealed at high temperature on the stripping substrate, mixed gas for forming a gas curtain is blown out, the residual non-volatile solvent in the dry film is extracted out to accelerate volatilization, and the solvent annealing treatment is carried out on the surface of the perovskite dry film.
Further, the solvent gas is one or more of N' N-Dimethylformamide (DMF), methylamine, ethylamine, triethylamine, dimethyl sulfoxide (DMSO), gamma-butyrolactone (GBL), ethylene glycol monomethyl ether, acetonitrile and chlorobenzene.
Further, the mixing ratio of the compressed air or nitrogen to the solvent is 90.
Further, the air knife types include a standard type air knife, an oblique square attraction type air knife, a double-slit type air knife, a raindrop type air knife or a square tube type air knife.
Furthermore, the glass substrate is driven by the sliding assembly to slide at a constant speed at a speed of 10-50 mm/s.
The utility model has the advantages that:
the air knife assembly convenient for high-temperature annealing of the large-area perovskite film layer simultaneously carries out secondary treatment on the high-temperature annealed perovskite dry film, extracts residual non-volatile solvent in the dry film to accelerate volatilization, and avoids resolubilization and crystallization of the surface of the perovskite caused by solvent volatilization and air condensation, so that a more uniform perovskite film is obtained; the solvent annealing treatment of the surface of the perovskite dry film is carried out by using an air knife while the high-temperature annealing is carried out, so that the consistency of perovskite crystals can be improved; the film forming stability of the perovskite film is improved, the product percent of pass is improved, and the production line mass production is facilitated.
Drawings
FIG. 1 is a schematic structural diagram of a wind knife assembly for facilitating high-temperature annealing of a large-area perovskite film layer according to this embodiment;
FIG. 2 is a sectional view of the gas heating apparatus according to the present embodiment;
the device comprises a compression air inlet, a left side solvent air inlet, a right side solvent air inlet, a 4-mixed pressurization air bottle, a 5-air heating device, a 6-air knife, a 7-perovskite dry film, an 8-glass substrate, a 9-air inlet, a 10-heating pipe, an 11-air outlet, a 12-thermocouple, a 13-mass sensor and a 14-switch valve.
Detailed Description
The technical solution of the present invention will be described clearly and completely by way of example with reference to the accompanying drawings.
Referring to fig. 1-2, the present embodiment provides an air knife assembly for facilitating high temperature annealing of a large area perovskite film, which includes a mixed pressurized gas cylinder 4, three sets of switch valves 14, a mass sensor 13, a gas heating device 5, 1 air knife 6, and a glass substrate 8.
Specifically, the mixed pressurized gas cylinder 4 is communicated with a compressed gas inlet 1 and a solvent gas inlet, the compressed gas inlet 1 is communicated with an on-off valve 14 and a mass sensor 13 in series, a certain amount of compressed air or high-purity nitrogen gas is injected into the compressed gas inlet 1, the solvent gas inlet is communicated with an on-off valve 14 and a mass sensor 13 in series, solvent gas gamma-butyrolactone (GBL) and ethylene glycol monomethyl ether (ethylene glycol monomethyl ether) are injected into the mixed pressurized gas cylinder 4 through the on-off valves 14 and the mass sensors 13 on two sides, and the mixed gas is pressurized and fully mixed and then is conveyed to the gas heating device 5.
Referring to fig. 2, the gas heating device 5 is provided with an air inlet 9 and an air outlet 11, the gas heating device 5 is cylindrical, the air inlet 9 is arranged on the side wall of the cylinder and is arranged along the tangential direction of the inner wall of the cylinder, so that the entering high-pressure mixed gas can spirally flow on the inner wall of the cylinder and is blown out from the axially arranged air outlet 11, the opposite end faces of the air outlet 11 are provided with a U-shaped heating pipe 10 and a thermocouple 12, the temperature change in the gas heating device 5 is monitored and fed back through the thermocouple 12, the heating temperature of the U-shaped heating pipe 10 is timely adjusted, and the mixed gas heated to the required temperature is guided to the air knife 6 through an air pipe and a connecting valve.
And the air outlet at the lower end of the air knife 6 is linear and is opposite to the perovskite dry film 7 annealed at high temperature on the stripping substrate, mixed gas forming an air curtain is blown out, the residual non-volatile solvent in the dry film is extracted out to accelerate volatilization, and the solvent on the surface of the perovskite dry film 7 is annealed.
In a further embodiment, the mixing ratio of the compressed air or nitrogen to the solvent is 80.
In a further embodiment, the type of air knives 6 comprises standard type air knives.
In a further embodiment, the glass substrate 8 is moved by the material flow rail at a constant speed of 20 mm/s.
The specific action process of the air knife component is as follows:
1. opening the mixed gas heating device before the glass substrate is annealed at a high temperature;
2. when the glass substrate runs on the logistics track, after the glass substrate enters the high-temperature annealing and is sensed by a sensor in front of an air knife, the air knife is opened through the electromagnetic valve delay function, and the delay time is 5-50 s;
3. after the air knife is opened, uniformly blowing the heated mixed gas on a perovskite dry film of the glass substrate through an air pipe and a connecting valve;
4. according to the requirements of different process conditions, the glass substrate runs at a fixed speed or at a variable speed;
5. when the sensor in front of the air knife can not sense the glass, the air knife is closed through the delay function of the electromagnetic valve, and the delay time is 5-50 s
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes, modifications, substitutions and alterations can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art, and the scope of the present invention is defined by the appended claims and their equivalents.
Claims (4)
1. The utility model provides a wind sword subassembly convenient to large tracts of land perovskite rete high temperature annealing which characterized in that: comprises a mixed pressurized gas cylinder, a plurality of groups of switch valves and mass sensors, a gas heating device, a plurality of air knives and a glass substrate,
the mixed pressurized gas cylinder is communicated with a compressed gas inlet and a solvent gas inlet, the compressed gas inlet is communicated with a switch valve and a mass sensor in series, a certain amount of compressed air or high-purity nitrogen is injected into the compressed gas inlet, the solvent gas inlet is communicated with a switch valve and a mass sensor in series, a certain amount of one or more solvent gases are injected into the mixed pressurized gas cylinder through the switch valve and the mass sensor, the mixed gas is pressurized and fully mixed and then is conveyed to a gas heating device,
the gas heating device is provided with an air inlet and an air outlet, the opposite end face of the air outlet is provided with a U-shaped heating pipe and a thermocouple, the temperature change in the gas heating device is monitored and fed back through the temperature measurement of the thermocouple, the heating temperature of the U-shaped heating pipe is timely adjusted, the mixed gas heated to the required temperature is guided to a plurality of air knives through an air pipe and connecting valves,
and the lower end gas outlet of the air knife is linear and is opposite to the perovskite dry film annealed at high temperature on the stripping substrate, mixed gas for forming a gas curtain is blown out, the residual non-volatile solvent in the dry film is extracted out to accelerate volatilization, and the solvent annealing treatment is carried out on the surface of the perovskite dry film.
2. The air knife assembly for facilitating high temperature annealing of large area perovskite film layers of claim 1, wherein: the gas heating device is cylindrical, the air inlet is formed in the side wall of the cylinder and is arranged along the tangential direction of the inner wall of the cylinder, so that the entering high-pressure mixed gas can flow spirally on the inner wall of the cylinder and is blown out from the axially arranged air outlet.
3. The air knife assembly for facilitating high temperature annealing of large area perovskite film layers of claim 1, wherein: the air knife types comprise an oblique square air knife, an oblique square attraction air knife, a double-seam air knife, a raindrop air knife or a square tube air knife.
4. The air knife assembly for facilitating high temperature annealing of large area perovskite film layers of claim 1, wherein: the glass substrate is driven by the sliding component to slide at a constant speed at the speed of 10-50 mm/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221981922.1U CN218868608U (en) | 2022-07-29 | 2022-07-29 | Air knife assembly convenient for large-area perovskite film layer high-temperature annealing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221981922.1U CN218868608U (en) | 2022-07-29 | 2022-07-29 | Air knife assembly convenient for large-area perovskite film layer high-temperature annealing |
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| CN218868608U true CN218868608U (en) | 2023-04-14 |
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| CN202221981922.1U Active CN218868608U (en) | 2022-07-29 | 2022-07-29 | Air knife assembly convenient for large-area perovskite film layer high-temperature annealing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116237212A (en) * | 2023-03-06 | 2023-06-09 | 华能新能源股份有限公司 | Film drying device |
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2022
- 2022-07-29 CN CN202221981922.1U patent/CN218868608U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116237212A (en) * | 2023-03-06 | 2023-06-09 | 华能新能源股份有限公司 | Film drying device |
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