CN110323336B - Method for enhancing stability of perovskite solar cell by using fluorescent doped coating - Google Patents

Method for enhancing stability of perovskite solar cell by using fluorescent doped coating Download PDF

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CN110323336B
CN110323336B CN201910292208.8A CN201910292208A CN110323336B CN 110323336 B CN110323336 B CN 110323336B CN 201910292208 A CN201910292208 A CN 201910292208A CN 110323336 B CN110323336 B CN 110323336B
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CN110323336A (en
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刘丹
韩文娇
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Wuhan University of Technology WUT
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    • H10K30/00—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation
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    • H10K30/15—Sensitised wide-bandgap semiconductor devices, e.g. dye-sensitised TiO2
    • H10K30/151—Sensitised wide-bandgap semiconductor devices, e.g. dye-sensitised TiO2 the wide bandgap semiconductor comprising titanium oxide, e.g. TiO2
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Abstract

The invention discloses a method for enhancing the stability of a perovskite solar cell by a fluorescent doped coating, and belongs to the field of perovskite solar cells and coatings. The method comprises the following steps: (1) dissolving a polymer in a solvent, heating, stirring and dissolving to obtain a polymer solution with a certain concentration, and dissolving fluorescent molecules in the polymer solution to obtain a fluorescent doped solution; (2) cleaning the light receiving surface of the battery and performing plasma surface treatment, and coating the fluorescent doping solution on the light receiving surface of the perovskite solar battery by a one-step spin coating method. The fluorescent doped coating can enhance the stability of the perovskite solar cell and is beneficial to the wide application and development of the perovskite solar cell.

Description

Method for enhancing stability of perovskite solar cell by using fluorescent doped coating
Technical Field
The invention belongs to the field of perovskite solar cells and coatings, and particularly relates to a method for enhancing the stability of a perovskite solar cell by a fluorescent doped coating.
Background
Now, energy problems are a big problem to our public, so that the development of sustainable energy is urgent. Solar energy is inexhaustible as renewable clean energy, so that the research on solar cells is one of the important trends of new energy development in order to reasonably develop and utilize the solar energy.
The perovskite solar cell takes an all-solid-state perovskite structure as a light absorption material, and the material has the advantages of simple preparation process, low cost and good development prospect. The perovskite solar cell has high-efficiency photoelectric conversion characteristics, the photoelectric conversion efficiency reaches 23.7%, and the perovskite solar cell has strong development potential.
However, halide perovskite materials in perovskite solar cells are degraded under the conditions of ultraviolet rays, moisture and oxygen, so that the efficiency of the cells is reduced very quickly and even the cells are failed, the stability of the cells is poor all the time, and further the industrial development of the cells is influenced.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a method for enhancing the stability of a perovskite solar cell by coating a fluorescent doped coating on the light receiving surface of the perovskite solar cell.
In order to realize the purpose, the technical scheme is as follows:
a method for enhancing the stability of a perovskite solar cell by a fluorescent doped coating comprises the following steps:
(1) dissolving a polymer in a solvent, heating, stirring and dissolving to obtain a polymer solution with a certain concentration, and dissolving fluorescent molecules in the polymer solution to obtain a fluorescent doped solution;
(2) cleaning the light receiving surface of the battery and performing plasma surface treatment, and coating the fluorescent doping solution on the light receiving surface of the perovskite solar battery by a one-step spin coating method.
According to the scheme, the fluorescent molecules in the step (1) are hydrophobic fluorescent molecules; specifically, 2,7-Bis {2- [ phenyl (m-tolyl) amino ] -9, 9-dimethyl-fluoren-7-yl } -9, 9-dimethylfluorene (2,7-Bis {2- [ phenyl (m-tolyl) amino ] -9,9-dimethyl-fluor-ene-7-yl } -9,9-dimethyl-fluorene, MDP3 FL); the polymer is Polyethylmethacrylate (PEMA) and the Tg is 60 degrees.
According to the scheme, the solvent in the step (1) is toluene; the heating temperature is 120-130 ℃; the stirring speed is 1000 rpm-1200 rpm.
According to the scheme, the concentration mass fraction of the polymer PEMA in the fluorescence doping solution in the step (2) is 3-7%, and the concentration mass fraction of the hydrophobic fluorescent molecule MDP3FL is 0.5-1.5%.
According to the scheme, the perovskite solar cell sequentially comprises a cell cathode layer (ITO) and an electron transport layer (TiO) from bottom to top2) Perovskite active layer (MAPbI)3) Hole transport layer (poly [ bis (4-phenyl) (2,4, 6-trimethylphenyl) amine)](PTAA) and MoO3) Anode (Ag).
According to the scheme, the perovskite solar cell is prepared by the following steps:
preparation of S1 electron transport layer: the prepared TiO is mixed2The solution is coated on the surface of an ITO substrate in a spinning mode, then the substrate is placed on a hot bench for annealing treatment, and the smooth and compact TiO with the surface can be obtained2A film;
preparation of S2 perovskite thin film layer: the perovskite material is MAPbI3Spin coating the prepared perovskite precursor solution on the electron transport layer to obtain the perovskite thin filmAnd then the mixture is placed on a hot table for thermal annealing treatment.
Preparation of S3 hole transport layer: the prepared poly [ bis (4-phenyl) (2,4, 6-trimethylphenyl) amine](PTAA) solution is coated on the perovskite layer in a spinning way without annealing treatment, and then the ITO sheet is placed in a patterned mask plate and put into a film plating machine until the vacuum degree is pumped to 2 multiplied by 10-6MoO deposition started above torr3And obtaining the hole transport layer.
Preparation of S4 metal electrode: MoO is evaporated3And then continuing to evaporate the Ag electrode.
S5 packaging the battery: and packaging the battery by using a packaging sheet and ultraviolet curing adhesive through ultraviolet lamp irradiation.
According to the scheme, the square resistance of the ITO glass in S1 is 8-115 omega cm2The light transmission rate is more than 84 percent;
according to the scheme, the annealing temperatures of the steps S1 and S2 are 100 ℃ and 150 ℃, respectively.
According to the scheme, the illumination power of the ultraviolet lamp in S5 is 480W.
According to the invention, the polymer, preferably PEMA, is used as a carrier, and the fluorescent molecule, preferably the hydrophobic fluorescent molecule MDP3FL, are doped with each other, so that the fluorescent doped coating which can absorb ultraviolet light and convert the ultraviolet light into visible light and has the hydrophobic characteristic is finally obtained, the film is transparent and uniform, the transmittance in the visible light range is not influenced, the ultraviolet irradiation resistant time is long, and the stability of the perovskite solar cell can be effectively enhanced when the film is used for the perovskite solar cell.
Specifically, in combination with the requirement of a fluorescent coating, the fluorescent coating is easy to dissolve and coat, can absorb ultraviolet light and convert visible light, does not affect visible light absorption, has high coating transmittance, has the performances of hydrophobicity and the like, and the concentration mass fraction of fluorescent molecules 2,7-Bis {2- [ phenyl (m-tolyl) amino ] -9, 9-dimethyl-fluoren-7-yl } -9,9-dimethyl-fluorene (2,7-Bis {2- [ phenyl- (m-tolyl) amino ] -9, 9-dimethyl-fluoro-7-yl } -9, 9-dimethyl-fluoro-ne (MDP3FL)) is generally 0.5-2%; the polymer is selected from polyethyl methacrylate (PEMA), and the concentration mass fraction of the polymer is 3-7% to achieve the ideal effect.
Compared with the prior art, the invention mainly has the following technical advantages:
the fluorescent doped coating is prepared by combining the fluorescent molecule MDP3FL and the polymer PEMA for the first time, and is transparent, flat and uniform without influencing the transmittance of the cell in the visible light range; when the ultraviolet light absorption material is used for a perovskite solar cell, harmful ultraviolet light can be absorbed and converted into usable visible light, the influence of the ultraviolet light on the cell is reduced, the ultraviolet light absorption material has strong ultraviolet light irradiation resistance, and the effect is still achieved after the ultraviolet light absorption material continuously irradiates for 25 days under an ultraviolet lamp; the hydrophobic performance can effectively reduce the influence of part of water on the battery, and greatly improve the stability of the battery; the application method is simple, the membrane is prepared in one step, the large-scale popularization is easy, and the membrane is non-toxic, harmless and pollution-free.
Drawings
FIG. 1 is a schematic view of a perovskite solar cell;
FIG. 2 is a schematic illustration of a fluorescent doped coating applied to a perovskite solar cell;
FIG. 3 is a structural formula diagram of hydrophobic fluorescent molecule MDP3 FL;
FIG. 4 is an absorption emission diagram of hydrophobic fluorescent molecule MDP3 FL. The trend line a is an absorption curve, the trend line b is an emission curve, the absorption wavelength of the emission curve can be seen to be 385nm, the emission wavelength is 440nm, and the performance of converting the absorbable ultraviolet light into visible light is met;
FIG. 5 water contact angle plot of a fluorescent doped coating applied on a perovskite solar cell;
FIG. 6 is a graph of the water contact angle of the coating of example 4(PEMA mass fraction 3%, fluorescent molecular mass fraction MDP3FL0.5%) applied on a perovskite solar cell;
FIG. 7 is a graph of the water contact angle of the coating of example 5(PEMA mass fraction 7%, fluorescent molecular mass fraction MDP3FL0.5%) applied on a perovskite solar cell;
fig. 8 is a graph comparing the visible light transmittance of the glass and the fluorescent doped coatings of the concentrations of example 1 (0.5%), example 2 (1%), example 3 (1.5%) and fluorescent molecule MDP3FL 2%, and it can be seen that the fluorescent doped coatings of examples 1, 2 and 3 do not affect the transmittance of the cell in the visible light range and can absorb ultraviolet light in the ultraviolet light range;
FIG. 9 is a graph of the luminescence intensity of a fluorescent doped coating, i.e., PL, with line a being the PL profile of the fluorescent doped coating of example 1 (0.5%) and line b being the PL profile of the fluorescent doped coating of example 2 (1%); trend line c is the PL curve for the fluorescent doped coating of example 3 (1.5%); trend line d is the PL curve for a fluorescent doped coating of 5 wt% PEMA to 2 wt% MDP3 FL;
FIG. 10 is a graph of UV durability of the fluorescent doped coatings of example 3 (1.5%) under UV lamp illumination, with trend lines a, b, c, d, e being durability curves for 0, 3, 5, 7, and 25 days of illumination, respectively;
FIG. 11 is a graph comparing the EQE of the fluorescently doped coated and uncoated devices of example 2 (1%), with trend line a being the EQE curve for the uncoated device and trend line b being the EQE curve for the coated device;
fig. 12 is a graph comparing the stability of the phosphor-doped coated device of example 1 (0.5%) to the uncoated device, with plot line a being the coated device efficiency normalization curve and plot line b being the uncoated device efficiency normalization curve.
Detailed Description
For better understanding of the present invention, the following description is further provided in connection with specific embodiments, but the present invention is not limited to the following embodiments. Various changes or modifications may be made to the invention by those skilled in the art, and equivalents may be made thereto without departing from the scope of the invention defined in the claims set forth herein.
Example 1
Selecting a square resistance of 8-115 omega cm in the step (1)2Light transmittance of > 84%, width of 1.5cm, length of 2cm, and total area of 3cm2The ITO glass of (1) was used as a substrate, and was ultrasonically cleaned with ethanol and isopropyl alcohol for 10min, respectively.
Step (2) Electron transport layer TiO2Preparation of the layer.
Coating 30 μ L solution on the surface of ITO substrate at 3000rpm-40s, and treating the film on a 150 deg.C hot bench for 30min to obtain flat and compact TiO2A film.
Step (3) preparation of perovskite thin film
Spin coating prepared perovskite precursor solution on TiO2And (3) obtaining a perovskite layer thin film, and placing the prepared perovskite thin film on a 100 ℃ hot bench for thermal annealing for 30min to obtain the perovskite thin film with a smooth and compact surface.
Step (4) hole transport layer poly [ bis (4-phenyl) (2,4, 6-trimethylphenyl) amine](PTAA) and MoO3Preparation of the layer
The prepared poly [ bis (4-phenyl) (2,4, 6-trimethylphenyl) amine](PTAA) solution is spin coated on the perovskite thin film at 3000rpm-40s without annealing; placing the ITO sheet in a patterned mask plate, placing the patterned mask plate in a film coating machine, and pumping to a vacuum degree of 2 x 10-6MoO deposition started above torr3Thereby obtaining a hole transport layer.
Step (5) preparation of Metal electrode
MoO is evaporated3And then continuing to evaporate the metal counter electrode Ag.
Step (6) packaging the perovskite solar cell
And (3) packaging the battery by using a packaging sheet and ultraviolet curing adhesive through irradiation of an ultraviolet lamp for 20 s.
Step (7) preparation of fluorescent doped coating solution
52.3mg of polymer PEMA is weighed and dissolved in 1150 mu L of toluene solvent, the polymer solution with the mass fraction of 5% is prepared by heating and stirring the solution at the temperature of 120 ℃ and the rotating speed of 1000rpm, and 5mg of fluorescent molecule MDP3FL is weighed and dissolved in the polymer solution to prepare the fluorescent doping solution with the PEMA mass fraction of 5% and the fluorescent molecule MDP3FL mass fraction of 0.5% -2%.
Step (8) preparation of fluorescent doped coating
Ultrasonically cleaning glass sheet with ethanol and isopropanol for 10min, blow-drying the glass sheet, performing Plasma surface treatment, and spin-coating 40 μ L of the prepared solution at 3000rpm-40s on a 1.5cm wide by 2cm long by 3cm total area2The flat, transparent and uniform fluorescent coating is obtained on the glass.
Testing of perovskite solar cell stability
And (3) simultaneously placing the battery coated with the coating and the battery not coated with the coating (as a comparison) in an atmospheric environment with the humidity of 30-70% to continuously irradiate ultraviolet light for 900h, continuously testing the photoelectric properties of EQE, PCE and the like of the two groups of batteries, and comparing the efficiency change of the two groups of batteries.
As shown in fig. 8, where the b-trend line is the transmittance of the combined fluorescent coating of 5% by mass of PEMA and 0.5% by mass of MDP3FL, and the a-trend line is the transmittance of glass, we can see that the fluorescent coating with 0.5% concentration of MDP3FL absorbs 94% of the uv light in the uv part and the transmittance does not decrease in the visible range.
As shown in fig. 9, which is a PL curve of the coating prepared from 0.5-2% by mass of MDP3FL and 5% by mass of PEMA, we can see that the fluorescent molecules emit around 440nm, and when the mass fraction of MDP3FL is 0.5%, the luminous intensity is highest compared with other concentrations, and in combination with fig. 4, we can see that the fluorescent doped coating can absorb ultraviolet light and convert it into visible light.
As shown in fig. 12, the a trend line is the change in efficiency of the coated cell and the b trend line is the change in efficiency of the uncoated cell. From the change of the two curves, it can be clearly seen that the efficiency of the coated cell is slightly reduced after the cell is irradiated for 900 hours under ultraviolet light, but the whole cell is relatively stable, which indicates that the fluorescent doped coating can enhance the stability of the perovskite solar cell.
Example 2
All steps and methods for preparing the battery are exactly the same as in the foregoing example 1
Step (1) preparation of fluorescent doped coating solution
Weighing 26mg of polymer PEMA, dissolving the polymer PEMA in 572 mu L of toluene solvent, heating and stirring the mixture at the temperature of 125 ℃ and the rotating speed of 1100rpm to dissolve the mixture to prepare a polymer solution with the concentration and the mass fraction of 5 percent, and weighing 5mg of fluorescent molecule MDP3FL, dissolving the mixture in the polymer solution to prepare a fluorescent doping solution with the concentration and the mass fraction of PEMA of 3 percent and the concentration and the mass fraction of fluorescent molecule MDP3FL of 1 percent.
Step (2) preparation of fluorescent doped coating
Ultrasonically cleaning glass sheet with ethanol and isopropanol for 10min, blow-drying the glass sheet for Plasma surface treatment, and spin-coating 45 μ L of the prepared solution at 3000rpm-40s in one-step spin-coating manner to form a coating with width of 1.5cm, length of 2cm and total area of 3cm2The flat, transparent and uniform fluorescent coating is obtained on the glass.
Application of fluorescent doped coating in step (3) on perovskite solar cell
Cleaning and surface ion treatment are carried out on the light receiving surface of the battery, and 45 mu L of prepared fluorescent doping solution is taken to be spin-coated on the light receiving surface of the perovskite solar battery at the speed of 3000rpm-40 s.
Step (4) testing stability of perovskite solar cell
And simultaneously placing the battery coated with the coating and the battery not coated with the coating in an atmospheric environment with the humidity of 30-70% to continuously irradiate ultraviolet light for 900h, continuously testing the photoelectric properties of the two groups of batteries, such as EQE, PCE and the like, and comparing the change of the photoelectric properties of the two groups of batteries.
As shown in fig. 8, the transmittance of the fluorescent coating with a combination of 5 wt% PEMA and 1 wt% MDP3FL as the c trend line, we can see that the fluorescent coating absorbs 98% of the uv light in the uv portion and the transmittance does not decrease in the visible range;
as shown in fig. 11, the a trend line is the change in EQE for the uncoated cell and the b trend line is the change in EQE for the coated cell. It can be seen that the EQE of the coated cell is much lower in the uv range than the uncoated cell, indicating that the coating does absorb a significant amount of uv light at this location.
Example 3
All steps and methods for preparing the battery are exactly the same as in the foregoing example 1
Step (1) preparation of fluorescent doped coating solution
Weighing 17.2mg of polymer PEMA, dissolving in 379 muL of toluene solvent, heating and stirring at the temperature of 130 ℃ and the rotating speed of 1200rpm to dissolve to prepare a polymer solution with the mass fraction of 5%, and weighing 5mg of fluorescent molecule MDP3FL, dissolving in the polymer solution to prepare a fluorescent doping solution with the PEMA concentration mass fraction of 7% and the fluorescent molecule MDP3FL concentration mass fraction of 1.5%.
Step (2) preparation of fluorescent doped coating
Ultrasonically cleaning glass sheet with ethanol and isopropanol for 10min, blow-drying the glass sheet for Plasma surface treatment, and spin-coating 50 μ L of the prepared solution at 3000rpm-40s in one-step spin-coating manner to form a coating with width of 1.5cm, length of 2cm and total area of 3cm2The flat, transparent and uniform fluorescent coating is obtained on the glass.
Application of fluorescent doped coating in step (3) on perovskite solar cell
Cleaning and surface ion treatment are carried out on the light receiving surface of the battery, and 50 mu L of prepared fluorescent doping solution is taken to be spin-coated on the light receiving surface of the perovskite solar battery at the speed of 3000rpm-40 s.
Step (4) testing stability of perovskite solar cell
And simultaneously placing the battery coated with the coating and the battery not coated with the coating in an atmospheric environment with the humidity of 30-70% to continuously irradiate ultraviolet light for 900h, continuously testing the photoelectric properties of the two groups of batteries, such as EQE, PCE and the like, and comparing the change of the photoelectric properties of the two groups of batteries.
As shown in fig. 8, the d-trend line is the transmittance of the fluorescent coating of 5 wt% PEMA combined with 1.5 wt% MDP3FL, we can see that the coating absorbs almost 100% of the uv light in the uv portion and the transmittance does not decrease in the visible range;
as shown in fig. 10, after 25 days, the coating still absorbs 40% of the uv light, and it can be seen that the fluorescent doped coating has a strong ability to withstand uv light irradiation.
Example 4
All steps and methods for preparing the battery are exactly the same as in the foregoing example 1
Step (1) preparation of fluorescent doped coating solution
Weighing 29.8mg of polymer PEMA, dissolving in 1115 mu L of toluene solvent, heating and stirring at the temperature of 120 ℃ and the rotating speed of 1000rpm to dissolve to prepare a polymer solution with the mass fraction of 3%, and weighing 5mg of fluorescent molecule MDP3FL, dissolving in the polymer solution to prepare a fluorescent doping solution with the mass fraction of PEMA of 3% and the mass fraction of fluorescent molecule MDP3FL of 0.5%.
Step (2) preparation of fluorescent doped coating
Ultrasonically cleaning glass sheet with ethanol and isopropanol for 10min, blow-drying the glass sheet, performing Plasma surface treatment, and spin-coating 40 μ L of the prepared solution at 3000rpm-40s on a 1.5cm wide by 2cm long by 3cm total area2The flat, transparent and uniform fluorescent coating is obtained on the glass.
Application of fluorescent doped coating in step (3) on perovskite solar cell
Cleaning and surface ion treatment are carried out on the light receiving surface of the battery, and 50 mu L of prepared fluorescent doping solution is taken to be spin-coated on the light receiving surface of the perovskite solar battery at the speed of 3000rpm-40 s.
Step (4) testing stability of perovskite solar cell
And (3) simultaneously placing the battery coated with the coating and the battery not coated with the coating (as a comparison) in an atmospheric environment with the humidity of 30-70% to continuously irradiate ultraviolet light for 900h, continuously testing the photoelectric properties of EQE, PCE and the like of the two groups of batteries, and comparing the efficiency change of the two groups of batteries.
As shown in fig. 6, the water contact angle diagram of the fluorescent doped coating with the PEMA mass fraction of 3% and the fluorescent molecule MDP3FL mass fraction of 0.5% applied on the perovskite solar cell shows that a uniform and complete coating can be obtained.
Example 5
All steps and methods for preparing the battery are exactly the same as in the foregoing example 1
Step (1) preparation of fluorescent doped coating solution
69.6mg of polymer PEMA is weighed and dissolved in 1068 muL of toluene solvent, the solution is heated and stirred at the temperature of 120 ℃ and the rotating speed of 1000rpm to be dissolved to prepare a polymer solution with the mass fraction of 7%, and then 5mg of fluorescent molecule MDP3FL is weighed and dissolved in the polymer solution to prepare a fluorescent doping solution with the mass fraction of PEMA of 7% and the mass fraction of fluorescent molecule MDP3FL of 0.5%.
Step (2) preparation of fluorescent doped coating
Ultrasonically cleaning glass sheet with ethanol and isopropanol for 10min, blow-drying the glass sheet, performing Plasma surface treatment, and spin-coating 40 μ L of the prepared solution at 3000rpm-40s on a 1.5cm wide by 2cm long by 3cm total area2The flat, transparent and uniform fluorescent coating is obtained on the glass.
Application of fluorescent doped coating in step (3) on perovskite solar cell
Cleaning and surface ion treatment are carried out on the light receiving surface of the battery, and 50 mu L of prepared fluorescent doping solution is taken to be spin-coated on the light receiving surface of the perovskite solar battery at the speed of 3000rpm-40 s.
Step (4) testing stability of perovskite solar cell
And (3) simultaneously placing the battery coated with the coating and the battery not coated with the coating (as a comparison) in an atmospheric environment with the humidity of 30-70% to continuously irradiate ultraviolet light for 900h, continuously testing the photoelectric properties of EQE, PCE and the like of the two groups of batteries, and comparing the efficiency change of the two groups of batteries.
As shown in fig. 7, the water contact angle diagram of the fluorescent doped coating with the PEMA mass fraction of 7% and the fluorescent molecule MDP3FL mass fraction of 0.5% applied on the perovskite solar cell shows that a uniform and complete coating can be obtained.

Claims (7)

1. A method for enhancing the stability of a perovskite solar cell by a fluorescent doped coating is characterized by comprising the following steps: the method comprises the following steps:
(1) dissolving a polymer in a solvent, heating, stirring and dissolving to obtain a polymer solution with a certain concentration, and dissolving fluorescent molecules in the polymer solution to obtain a fluorescent doped solution, wherein the fluorescent molecules are hydrophobic fluorescent molecules; specifically 2,7-bis {2- [ phenyl (m-tolyl) amino ] -9, 9-dimethyl-fluoren-7-yl } -9, 9-dimethylfluorene; the polymer is poly (ethyl methacrylate);
(2) cleaning the light receiving surface of the perovskite solar cell, performing plasma surface treatment on the light receiving surface of the perovskite solar cell, and coating a fluorescent doping solution on the light receiving surface of the perovskite solar cell by a one-step spin coating method, wherein the light receiving surface is an ITO (indium tin oxide) basal surface.
2. The method of enhancing the stability of perovskite solar cells with a fluorescent doped coating as claimed in claim 1, wherein: the solvent in the step (1) is toluene; the heating temperature is 120-130 ℃; the stirring speed is 1000rpm to 1200 rpm.
3. The method of enhancing the stability of perovskite solar cells with a fluorescent doped coating as claimed in claim 1, wherein: in the fluorescent doping solution in the step (2), the concentration mass fraction of the polymer PEMA is 3% -7%, and the concentration mass fraction of the hydrophobic fluorescent molecule MDP3FL is 0.5% -1.5%.
4. The method of enhancing the stability of perovskite solar cells with a fluorescent doped coating as claimed in claim 1, wherein: the perovskite solar cell sequentially comprises a cell cathode layer, an electron transport layer, a perovskite active layer, a hole transport layer and an anode from bottom to top, wherein the hole transport layer is poly [ bis (4-phenyl) (2,4, 6-trimethylphenyl) amine](PTAA) and MoO3The cathode layer of the battery is ITO, and the electron transmission layer is TiO2The perovskite active layer is MAPbI3And the anode is Ag.
5. The method of enhancing the stability of perovskite solar cells with a fluorescent doped coating as claimed in claim 4, wherein: preparing the perovskite solar cell:
preparation of S1 electron transport layer: the prepared TiO is mixed2The solution is coated on the surface of an ITO substrate in a spinning mode, then the substrate is placed on a hot bench for annealing treatment, and the smooth and compact TiO with the surface can be obtained2A film;
preparation of S2 perovskite thin film layer: the perovskite material is MAPbI3Spin-coating the prepared perovskite precursor solution on an electron transport layer to obtain a perovskite thin film, and placing the perovskite thin film on a hot platform for thermal annealing treatment;
preparation of S3 hole transport layer:the prepared poly [ bis (4-phenyl) (2,4, 6-trimethylphenyl) amine](PTAA) solution is coated on the perovskite layer in a spinning way without annealing treatment, and then the ITO sheet is placed in a patterned mask plate and put into a film plating machine until the vacuum degree is pumped to 2 multiplied by 10-6MoO deposition started above torr3Obtaining a hole transport layer;
preparation of S4 metal electrode: MoO is evaporated3Then continuing to evaporate an Ag electrode;
s5 packaging the battery: and packaging the battery by using a packaging sheet and ultraviolet curing adhesive through ultraviolet lamp irradiation.
6. The method of enhancing the stability of perovskite solar cells with a fluorescent doped coating as claimed in claim 5, wherein: the annealing temperatures of steps S1 and S2 were 100 ℃ and 150 ℃, respectively.
7. The method of enhancing the stability of perovskite solar cells with a fluorescent doped coating as claimed in claim 5, wherein: the illumination power of the ultraviolet lamp in the S5 is 480W.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101494248A (en) * 2009-03-05 2009-07-29 中山大学 Flat-plate concentration solar battery and method for manufacturing the same
EP2262024A1 (en) * 2009-06-09 2010-12-15 Institut de Ciències Fotòniques, Fundació Privada Optical cavity controlled fluorescent photovoltaic cell
CN107768524A (en) * 2017-12-04 2018-03-06 湖南师范大学 A kind of perovskite solar cell of efficient stable and preparation method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101494248A (en) * 2009-03-05 2009-07-29 中山大学 Flat-plate concentration solar battery and method for manufacturing the same
EP2262024A1 (en) * 2009-06-09 2010-12-15 Institut de Ciències Fotòniques, Fundació Privada Optical cavity controlled fluorescent photovoltaic cell
CN107768524A (en) * 2017-12-04 2018-03-06 湖南师范大学 A kind of perovskite solar cell of efficient stable and preparation method thereof

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