CN115835741A - Perovskite solar cell and preparation method thereof - Google Patents
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Abstract
The invention discloses a perovskite solar cell and a preparation method thereof, wherein the preparation method comprises the following steps: ultrasonically cleaning a substrate by adopting a mixed solution of domestic water and a glass cleaning agent, domestic water and absolute ethyl alcohol in sequence, blowing dry by using a nitrogen dust blowing gun, and treating by using an ultraviolet-ozone device; spin-coating an electron transport layer on the surface of the processed substrate; dissolving lead iodide, formamidine hydroiodide, methyl amine iodide, methylamine chloride, cesium iodide, rubidium iodide, L-alpha-phosphatidylcholine and phenethyl amine chloride in a mixed solution of N, N-dimethylformamide, dimethyl sulfoxide and ethylene glycol monomethyl ether to obtain a perovskite precursor solution, and blade-coating the perovskite precursor solution on the surface of the electron transport layer to form a perovskite layer; spin coating a hole transport layer on the surface of the perovskite layer; and evaporating an electrode layer on the surfaces of the hole transport layer and the substrate. The invention improves the scraping and coating speed and the preparation efficiency of the process, and simultaneously ensures the good performance and stability of the device.
Description
Technical Field
The invention belongs to the technical field of new materials and new energy, and particularly relates to a perovskite solar cell and a preparation method thereof.
Background
Organic-inorganic hybrid perovskite materials are widely concerned and applied in the field of photoelectric devices due to the characteristics of large absorption coefficient, adjustable band gap, high carrier mobility, long carrier service life, low-cost solution preparation process and the like. The photoelectric conversion efficiency of the perovskite solar cell is improved from 3.8% to 25.7% in short decades, can be compared with a silicon cell, and is considered as a new star of the next generation photovoltaic industry. However, commercialization of perovskite solar cells also faces significant challenges.
High performance perovskite solar cells are currently prepared in the laboratory by spin coating, by coating on a small substrate in the center (typically no more than 0.1 cm) 2 ) The solution is dripped, then the substrate is rotated at a high speed, the solution in the center of the substrate is uniformly coated on the whole substrate by utilizing the centrifugal force generated by rotation, but the surface of the generated film is not uniform due to the different centrifugal forces at the positions with different distances from the circle center, and the method is not suitable for preparing the large-area perovskite solar cell. For this reason, various perovskite thin film preparation processes such as spraying, inkjet printing, slit coating, and blade coating have been developed to realize the preparation of large-area perovskite devices. Wherein, the scraper coating technology has the advantages of simple operation, high material utilization rate and the likeThe method is characterized by being widely applied to the preparation of large-area perovskite solar cells. A paper "Air-Stable, effective Mixed-Cable Perovskite Solar Cells with Cu Electrode by Scalable Fault of Active Layer" (Advanced Energy Materials, vol.6 (11), pp.1600372, 2016) published by Yehao Deng et al provides a method for preparing dense, uniform-grained Perovskite FA based on blade coating technology 0.6 MA 0.4 PbI 3 The thin film method realizes a method for preparing the perovskite solar cell by printing based on an inverse structure (ITO/hole transport layer/perovskite layer/electron transport layer/electrode); jie Ding et al in its published paper "full Air-doped High-Efficiency Perovskite photo voltaics" (joule, vol.3 (2), pp.402-416, 2019) provides a nitrogen scraper assisted preparation method of low temperature deposition Perovskite thin film and solar cell, the scraper coating speed adopted by the method is 50mm/s, and Perovskite thin film and device are prepared in the Air environment, thereby realizing larger grain size and longer carrier life, and remarkably improving the quality of Perovskite thin film.
However, the method proposed by Yehao Deng et al, the speed of the blade coating used in the preparation process is only 7.5mm/s, the quality of the prepared perovskite thin film is poor, the performance of the device is low, and the stability is not high; the method proposed by Jie Ding et al is greatly affected by the environmental humidity, and the thin film still has more defects, resulting in poor device performance and stability. Meanwhile, the running speed of the scraper for preparing the high-performance perovskite solar cell by the current scraper coating technology is generally below 50mm/s, so that the low scraper coating speed not only influences the large-scale commercial development of the perovskite solar cell, but also increases the process cost.
Disclosure of Invention
In order to solve the above problems in the prior art, the present invention provides a perovskite solar cell and a method for manufacturing the same. The technical problem to be solved by the invention is realized by the following technical scheme:
in a first aspect, an embodiment of the present invention provides a method for manufacturing a perovskite solar cell, including:
ultrasonically cleaning a substrate by adopting a mixed solution of domestic water and a glass cleaning agent, domestic water and absolute ethyl alcohol in sequence, blowing dry by using a nitrogen dust blowing gun, and treating by using an ultraviolet-ozone device;
spin-coating an electron transport layer on the surface of the processed substrate;
dissolving lead iodide, formamidine hydroiodide, methyl amine iodide, methylamine chloride, cesium iodide, rubidium iodide, L-alpha-phosphatidylcholine and phenethyl amine chloride in a mixed solution of N, N-dimethylformamide, dimethyl sulfoxide and ethylene glycol monomethyl ether to obtain a perovskite precursor solution, and blade-coating the perovskite precursor solution on the surface of the electron transport layer by adopting a scraper coating technology to form a perovskite layer; wherein the coating speed of the scraper is 90 mm/s-110 mm/s;
spin coating a hole transport layer on the surface of the perovskite layer;
and evaporating electrode layers on the surfaces of the hole transport layer and the substrate to finish the preparation of the perovskite solar cell.
In one embodiment of the invention, the area of the substrate is 2 x 2.5cm 2 ～10×10cm 2 。
In one embodiment of the present invention, the volume ratio of the domestic water to the glass cleaning agent used in the mixed solution of the domestic water and the glass cleaning agent is 3.
In one embodiment of the present invention, forming an electron transport layer on a surface of a processed substrate includes:
preparing a mixed solution by using tin dioxide powder and absolute methanol, spin-coating the mixed solution on the surface of the treated substrate, and annealing to form the electron transport layer.
In one embodiment of the present invention, the concentration of tin dioxide in the mixed solution forming the electron transport layer is 5% to 7%.
In one embodiment of the present invention, the concentration of dimethyl sulfoxide in the obtained perovskite precursor solution is 7% to 13%.
In one embodiment of the invention, when the perovskite precursor solution is scraped and coated on the surface of the electron transport layer, the distance between the scraper and the electron transport layer is 200-300 μm.
In one embodiment of the present invention, before the doctor-blading the perovskite precursor solution onto the surface of the electron transport layer, the method further comprises:
the substrate on which the electron transport layer is spin-coated is preheated.
In one embodiment of the present invention, the entire perovskite solar cell fabrication process is performed under indoor ambient conditions with humidity greater than 50%.
In a second aspect, an embodiment of the present invention provides a perovskite solar cell, which is prepared according to any one of the above methods for preparing a perovskite solar cell.
The invention has the beneficial effects that:
according to the preparation method of the perovskite solar cell, the perovskite solar cell with the large-area film is prepared by using the scraper coating technology, the problem that the large-area film cannot be prepared by using the spin-coating method of the existing mainstream high-performance perovskite preparation technology is solved, the performance and the stability of a device are considered, compared with other technologies capable of preparing the perovskite film in a large area, such as spraying, ink-jet printing, slit coating and the like, the scraper coating technology has the advantages of simplicity in operation, higher material utilization rate, lower cost, good film quality and the like, and has higher cost and process advantages in the commercial development of the perovskite solar cell; the invention uses the ultrahigh coating speed of 90-110 mm/s, adopts dimethyl sulfoxide solvent to regulate and control a process window in the process, prolongs the crystallization process of the film, obtains a uniform and compact perovskite film while ensuring the higher coating speed by comprehensively regulating and controlling the solvent engineering of methylamine chloride, cesium iodide, rubidium iodide, L-alpha-phosphatidylcholine and phenethyl ammonium chloride, and prepares a device with excellent photoelectric properties. Therefore, the invention ensures good device performance and stability while improving the blade coating speed and improving the process preparation efficiency.
According to the invention, lead iodide, formamidine hydroiodide, methyl amine iodide, methylamine chloride, cesium iodide, rubidium iodide, L-alpha-phosphatidylcholine and phenethyl amine chloride are dissolved in a mixed solution of N, N-dimethylformamide, dimethyl sulfoxide and ethylene glycol monomethyl ether to obtain a perovskite precursor solution, and then the perovskite solar cell prepared by using the perovskite precursor solution is an organic-inorganic hybrid perovskite material. Pure organic perovskite solar cells are of great interest because of their excellent photoelectric conversion efficiency, but they are less stable and more susceptible to degradation in air. The excellent stability of pure inorganic perovskites is comparable to that of mature silicon-based solar cells, but the photoelectric conversion efficiency of inorganic perovskites is yet to be improved compared to that of organic perovskites. The organic-inorganic hybrid perovskite material disclosed by the invention has the advantages of improving the stability of a device, simultaneously keeping the outstanding performance advantages of an organic perovskite battery, avoiding the defects of organic perovskite and inorganic perovskite, and combining the advantages of both the organic perovskite and the inorganic perovskite.
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Drawings
Fig. 1 is a schematic flow chart of a method for manufacturing a perovskite solar cell according to an embodiment of the present invention;
FIG. 2 is a schematic illustration of a blade coating technique provided by an embodiment of the present invention;
FIG. 3 is a schematic diagram of a UV-vis spectrum of a perovskite solar cell prepared correspondingly to different concentrations of dimethyl sulfoxide in a perovskite precursor solution provided by an embodiment of the invention;
fig. 4 is a schematic diagram of a perovskite solar cell provided by an embodiment of the invention.
Detailed Description
The present invention will be described in further detail with reference to specific examples, but the embodiments of the present invention are not limited thereto.
At present, high-performance perovskite solar cells are prepared in a laboratory through a spin coating method, and the method is not suitable for preparing large-area perovskite solar cells. For this reason, various fabrication processes such as spraying, inkjet printing, slit coating, etc. have been developed to achieve large area perovskite thin films and devices. The perovskite thin film prepared by the technology still has more defect states, and the performance and the stability of the device have larger promotion space. The scraper coating technology has the characteristics of simple operation, high material utilization rate and the like, and is widely applied to the preparation of large-area perovskite solar cells. The inventor researches and discovers that in the process of preparing the perovskite thin film based on the blade coating technology, the blade coating speed has a crucial influence on the thickness and the quality of the perovskite thin film. A large amount of solution can be dragged at a higher scraper speed, so that solution convection is caused, and the appearance of the film is poor; moreover, the solvent may flow before evaporation and crystallization, resulting in a discontinuous film. Conversely, a slower blade speed may result in a weaker blade force on the solvent, a reduced crystallization window time of the film, and a poorer film quality; furthermore, during the coating process, the thickness of the film gradually decreases in the coating direction as the solution is consumed, which also results in non-uniformity of the film. The operation speed of the scraper for preparing the high-performance perovskite solar cell by the current scraper coating technology is generally below 50mm/s, and the low scraper coating speed not only influences the large-scale commercial development of the perovskite solar cell, but also increases the process cost.
In addition, most of the existing high-performance perovskite solar cell preparation processes are completed in a nitrogen atmosphere, and the experimental conditions ensure an ultra-clean environment without water, oxygen and dust, but increase the complexity and cost of the processes, and are not beneficial to the commercial development of the perovskite solar cell. Therefore, there is a need to develop a process for preparing large-area, high-quality perovskite solar cells in an air environment at low cost.
In order to solve the above problem, referring to fig. 1, an embodiment of the present invention provides a method for manufacturing a perovskite solar cell, which specifically includes the following steps:
s10, sequentially adopting a mixed solution of domestic water and a glass cleaning agent, domestic water and absolute ethyl alcohol to perform ultrasonic cleaning on the substrate, then using a nitrogen dust blowing gun to blow the substrate dry, and then using ultraviolet rays to perform ultrasonic cleaning - And (5) treating by using an ozone device.
The invention provides an alternative scheme, wherein a substrate is sequentially ultrasonically cleaned for 15min by adopting a mixed solution of domestic water and a glass cleaning agent, domestic water and absolute ethyl alcohol, then dried by a nitrogen dust blowing gun and treated for 30min by an ultraviolet-ozone device. Wherein, the volume ratio of the domestic water and the glass cleaning agent used by the mixed liquid of the domestic water and the glass cleaning agent is 3.
The substrate of the embodiment of the invention can be Indium-Tin Oxide (ITO for short) conductive glass, and the area of the substrate can be 2 multiplied by 2.5cm 2 ～10×10cm 2 。
It should be noted that the area of the substrate can be less than 2 × 2.5cm in the embodiments of the present invention 2 The above perovskite solar cell fabrication is only intended to highlight that the embodiment of the present invention can achieve the fabrication of a large-area perovskite solar cell.
And S20, spin-coating an electron transport layer on the surface of the processed substrate.
An alternative solution is provided, in which an electron transport layer is formed on a surface of a processed substrate, including: preparing a mixed solution by using tin dioxide powder and anhydrous methanol, spin-coating the mixed solution on the surface of the treated substrate, and annealing to form the electron transport layer. Wherein, the concentration of the stannic oxide in the mixed solution for forming the electron transport layer is 5-7%, and more preferably, the concentration of the stannic oxide in the mixed solution for forming the electron transport layer is 6%.
S30, dissolving lead iodide, formamidine hydroiodide, methyl amine iodide, methylamine chloride, cesium iodide, rubidium iodide, L-alpha-phosphatidylcholine and phenethyl amine chloride in a mixed solution of N, N-dimethylformamide, dimethyl sulfoxide and ethylene glycol monomethyl ether to obtain a perovskite precursor solution, and blade-coating the perovskite precursor solution on the surface of the electron transport layer by adopting a scraper coating technology to form a perovskite layer; wherein the coating speed of the scraper is 90 mm/s-110 mm/s.
The method for coating the surface of the electron transport layer with the perovskite precursor solution comprises the following steps: preheating the substrate coated with the electron transport layer in a spinning mode, and specifically, preheating the ITO conductive glass coated with the electron transport layer for 20s in a heating table at 150 ℃.
Lead iodide, formamidine hydroiodide, methyl amine iodide, methylamine chloride, cesium iodide, rubidium iodide, L-alpha-phosphatidylcholine and phenethyl amine chloride are put into a mixed solution of N, N-dimethylformamide, dimethyl sulfoxide and ethylene glycol monomethyl ether, stirred for 14 hours at room temperature to obtain a perovskite precursor solution, and the perovskite precursor solution is blade-coated on the surface of the electron transport layer at a high speed of 90 mm/s-110 mm/s by adopting a scraper coating technology shown in figure 2. And (3) after finishing blade coating, annealing at 100 ℃ for 5-10 min to form a perovskite layer. Wherein, the substrate illustrated in fig. 2 is a substrate spin-coated with an electron transport layer; more preferably, the coating speed of the blade is 100mm/s.
Wherein the concentrations of lead iodide, formamidine hydroiodide, methyl amine iodide, methylamine chloride, cesium iodide, rubidium iodide, L-alpha-phosphatidylcholine and phenethyl amine chloride in the prepared perovskite precursor solution are 1mol/L, 0.75mol/L, 0.2mol/L, 0.15mol/L, 0.005mol/L, 0.0025mol/L, 0.0004mol/L and 0.0004mol/L in sequence; the concentration of dimethyl sulfoxide in the obtained perovskite precursor solution is 7% -13%, and more preferably, the concentration of dimethyl sulfoxide in the obtained perovskite precursor solution is 10%; when the perovskite precursor solution is coated on the surface of the electron transport layer by blade coating, the distance between the scraper and the electron transport layer is 200-300 μm, and more preferably, the distance between the scraper and the electron transport layer is 250 μm.
And S40, spin-coating a hole transport layer on the surface of the perovskite layer.
The embodiment of the invention provides an alternative scheme that a hole transport layer Spiro-OMeTAD is coated on the surface of the perovskite layer in a spin coating mode, and an electrode deposition area is scraped by an engraving knife.
And S50, evaporating an electrode layer on the surfaces of the hole transport layer and the substrate.
The embodiment of the invention provides an alternative scheme, silver (Ag) is deposited in a hole transport layer and an electrode deposition area on the surface of a substrate by using a vacuum evaporation device to form an Ag electrode layer, the thickness of the Ag electrode layer is 100nm, and the area of a single device of the Ag electrode layer on the surface of the hole transport layer is 0.08cm 2 。
The whole preparation process of the perovskite solar cell is carried out under the indoor environment condition that the humidity is more than 50%. Under the preparation environmental conditions, the preparation of the perovskite solar cell has more practical value and wider market application prospect.
In order to verify the importance of dimethyl sulfoxide in the preparation process of the perovskite solar cell provided by the embodiment of the invention, perovskite precursor solutions with dimethyl sulfoxide concentrations of 0%, 3%, 7%, 10% and 13% are respectively prepared and compared, and other experimental conditions are completely the same, so that the UV-vis spectrum of the perovskite solar cell prepared as shown in fig. 3 can be obtained. In fig. 3, the ordinate (a.u.) represents the Absorption intensity, a.u. refers to dimensionless units, the abscissa (Wavelength) (nm) represents the Wavelength in nm, and DMSO refers to dimethyl sulfoxide. In the wavelength range of 400nm to 500nm, as can be seen from fig. 3, when the concentration of dimethyl sulfoxide in the perovskite precursor solution is 7%, 10% and 13%, the device shows higher light absorption, and when the concentration of dimethyl sulfoxide in the perovskite precursor solution is 0% and 3%, the quality of the perovskite thin film is reduced, which indicates that the dimethyl sulfoxide with proper concentration can improve the quality of the perovskite thin film, thereby increasing the number of current carriers and improving the performance and stability of the device.
In summary, the perovskite solar cell preparation method provided by the embodiment of the invention uses the doctor blade coating technology to prepare the perovskite solar cell with the large-area thin film, solves the problem that the current mainstream high-performance perovskite preparation technology spin-coating method cannot prepare the large-area thin film, and simultaneously considers the performance and stability of the device, compared with other technologies which can prepare the perovskite thin film in a large area, such as spraying, ink-jet printing, slit coating and the like, the doctor blade coating technology has the advantages of simple operation, high material utilization rate, low cost, good thin film quality and the like, and has higher cost and process advantages in the commercial development of the perovskite solar cell; the embodiment of the invention uses the ultrahigh coating speed of 90-110 mm/s, and adopts dimethyl sulfoxide solvent to regulate and control a process window in the process, so as to prolong the crystallization process of the film, and regulate and control the solvent engineering of methylamine chloride, cesium iodide, rubidium iodide, L-alpha-phosphatidylcholine and phenethyl ammonium chloride comprehensively, so as to regulate the scraper distance and the substrate temperature, thereby obtaining a uniform and compact perovskite film while ensuring higher coating speed, and preparing a device with excellent photoelectric performance. Therefore, the embodiment of the invention improves the blade coating speed and the preparation efficiency of the process, and simultaneously ensures good device performance and stability.
According to the embodiment of the invention, lead iodide, formamidine hydroiodide, methyl amine iodide, methylamine chloride, cesium iodide, rubidium iodide, L-alpha-phosphatidyl choline and phenethyl amine chloride are dissolved in a mixed solution of N, N-dimethylformamide, dimethyl sulfoxide and ethylene glycol monomethyl ether to obtain a perovskite precursor solution, and then the perovskite solar cell prepared from the perovskite precursor solution is used as an organic-inorganic hybrid perovskite material. Pure organic perovskite solar cells are of great interest because of their excellent photoelectric conversion efficiency, but they are less stable and more susceptible to degradation in air. The excellent stability of pure inorganic perovskites is comparable to that of mature silicon-based solar cells, but the photoelectric conversion efficiency of inorganic perovskites is yet to be improved compared to that of organic perovskites. The organic-inorganic hybrid perovskite material provided by the embodiment of the invention has the advantages of improving the stability of the device, simultaneously keeping the outstanding performance advantages of the organic perovskite battery, avoiding the defects of the organic perovskite and the inorganic perovskite, and having the advantages of the organic perovskite and the inorganic perovskite.
The blade coating process of the perovskite layer of the embodiment of the invention can be carried out under the environmental condition that the humidity in the air is more than 50 percent. The preparation of high-performance perovskite solar cells by the early scraper coating technology is carried out in a laboratory inert gas environment, and the experimental conditions need to ensure an ultra-clean environment without water, oxygen and dust and greatly increase the complexity and the cost of the process. With the advent of nitrogen knives, the knife coating technique can also be carried out in air, but is greatly affected by air humidity. The embodiment of the invention uses a preparation process combining substrate preheating and scraper coating, the substrate is preheated before the perovskite thin film is prepared, and the humidity of the substrate coating area is reduced through high temperature, so that the preparation of a large-area high-quality thin film in high-humidity air is realized. Compared with a scraper coating process with the addition of a nitrogen scraper, the preparation process combining substrate preheating and scraper coating has the characteristics of simplicity in operation, low cost and the like, compared with the complex equipment structure of the nitrogen scraper and the cost burden increased by large consumption of nitrogen, the hot coating process has the advantages of higher cost and reliability in the commercial production of large-scale preparation of perovskite solar cells, the embodiment of the invention adopts a dimethyl sulfoxide solvent to regulate and control the crystallization window of the film, and regulates the scraper distance and the substrate temperature by comprehensively regulating and controlling the solvent engineering of methylamine chloride, cesium iodide, rubidium iodide, L-alpha-phosphatidylcholine and phenethyl ammonium chloride, so that the deposition of a high-quality large-area perovskite film can be realized under high-humidity air, and a device with excellent photoelectric property is prepared.
It should be noted that the above preparation process only describes the preparation process of the organic-inorganic hybrid perovskite material, and the preparation process is also applicable to the preparation of pure inorganic perovskite and pure organic perovskite solar cells.
In a second aspect, referring to fig. 4, an embodiment of the present invention provides a perovskite solar cell, which is prepared according to the method for preparing a perovskite solar cell provided in the first aspect.
For the perovskite solar cell embodiment of the second aspect, since it is substantially similar to the fabrication method embodiment of the first aspect, the description is relatively simple, and for the relevant points, reference may be made to the partial description of the fabrication method embodiment of the first aspect.
In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
While the invention has been described in connection with various embodiments, other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed invention, from a review of the specification and the drawings. In the specification, the word "comprising" does not exclude other elements or steps, and the word "a" or "an" does not exclude a plurality. The mere fact that certain measures are recited in mutually different examples does not indicate that these measures cannot be combined to good effect.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (10)
1. A method of fabricating a perovskite solar cell, comprising:
ultrasonically cleaning a substrate by adopting a mixed solution of domestic water and a glass cleaning agent, domestic water and absolute ethyl alcohol in sequence, blowing dry by using a nitrogen dust blowing gun, and treating by using an ultraviolet-ozone device;
spin-coating an electron transport layer on the surface of the processed substrate;
dissolving lead iodide, formamidine hydroiodide, methyl amine iodide, methylamine chloride, cesium iodide, rubidium iodide, L-alpha-phosphatidylcholine and phenethyl amine chloride in a mixed solution of N, N-dimethylformamide, dimethyl sulfoxide and ethylene glycol monomethyl ether to obtain a perovskite precursor solution, and blade-coating the perovskite precursor solution on the surface of the electron transport layer by adopting a scraper coating technology to form a perovskite layer; wherein the coating speed of the scraper is 90 mm/s-110 mm/s;
spin coating a hole transport layer on the surface of the perovskite layer;
and evaporating electrode layers on the surfaces of the hole transport layer and the substrate to finish the preparation of the perovskite solar cell.
2. The method of manufacturing a perovskite solar cell according to claim 1,characterized in that the area of the substrate is 2 x 2.5cm 2 ～10×10cm 2 。
3. The method for producing a perovskite solar cell as claimed in claim 1, wherein the volume ratio of the domestic water to the glass cleaning agent used in the mixed solution of the domestic water and the glass cleaning agent is 3.
4. The method of fabricating a perovskite solar cell as claimed in claim 1, wherein spin coating an electron transport layer on the surface of the treated substrate comprises:
preparing a mixed solution by using tin dioxide powder and anhydrous methanol, spin-coating the mixed solution on the surface of the treated substrate, and annealing to form the electron transport layer.
5. The method for producing a perovskite solar cell as claimed in claim 4, wherein the concentration of tin dioxide in the mixed solution for forming the electron transport layer is 5% to 7%.
6. The method of manufacturing a perovskite solar cell as claimed in claim 1, wherein the concentration of dimethyl sulfoxide in the resulting perovskite precursor solution is between 7% and 13%.
7. The method according to claim 1, wherein the distance between the doctor blade and the electron transport layer is 200 μm to 300 μm when the perovskite precursor solution is blade-coated onto the surface of the electron transport layer by a doctor blade coating technique.
8. The method of fabricating a perovskite solar cell as claimed in claim 1, wherein before the doctor-blading of the perovskite precursor solution onto the surface of the electron transport layer, further comprises:
the substrate on which the electron transport layer is spin-coated is preheated.
9. The method of fabricating a perovskite solar cell as claimed in claim 1, wherein the entire perovskite solar cell fabrication process is performed under indoor ambient conditions with a humidity of greater than 50%.
10. A perovskite solar cell, characterized by being produced by the method for producing a perovskite solar cell according to any one of claims 1 to 9.
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| CN116096194B (en) * | 2023-04-07 | 2023-08-18 | 合肥市旭熠科技有限公司 | Novel method for preparing large-area perovskite film and application |
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