CN111029463A - Perovskite thin film and solar cell with same - Google Patents
Perovskite thin film and solar cell with same Download PDFInfo
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- CN111029463A CN111029463A CN201911029768.0A CN201911029768A CN111029463A CN 111029463 A CN111029463 A CN 111029463A CN 201911029768 A CN201911029768 A CN 201911029768A CN 111029463 A CN111029463 A CN 111029463A
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Abstract
A perovskite film with a passivation layer is characterized in that a modification solution forms the passivation layer on the surface of the perovskite film by adopting a spin-coating method and a soaking method; the passivation molecule of the passivation layer is composed of three parts: aryl, alkyl and functional groups; aryl is: any one of arylene, heteroarylene, arylene vinylene, heteroarylene vinylene, arylene ethynylene, and heteroarylene ethynylene; y in the alkyl is more than or equal to 1; the functional group is any one of sulfydryl, amido, ammonium, sulfate, phosphate and sulfonate. According to the perovskite thin film after passivation, as the passivation molecules of the passivation layer are characterized in that both ends of the aryl group have functional groups, the acting force between the passivation molecules and the perovskite is enhanced; more importantly, when functional groups at two ends act with perovskite, the middle aryl part can more effectively cover the surface of the perovskite and repair the structural defects; finally, the stability of the perovskite solar cell is improved.
Description
Technical Field
The invention relates to the technical field of photoelectric functional materials and devices, in particular to a perovskite thin film and a preparation method thereof.
Background
So far, the power conversion efficiency of the perovskite solar cell reaches 25.2% through reasonably designing the device structure, improving the crystallization quality of the thin film and modifying the carrier transport layer/perovskite interface. Of course, the excellent photovoltaic performance of the perovskite solar cell does not depart from the unique photoelectric characteristics of the perovskite, such as high absorption coefficient, adjustable band gap, low exciton binding energy, high carrier mobility, long carrier life and diffusion length.
Defect passivation has been an important issue for solar cells. In the case of perovskite solar cells, the light-absorbing layer is a solution-prepared polycrystalline perovskite thin film, which means that a large number of unavoidable disordered structures, such as grain boundaries and incongruous and amorphous regions between grain boundaries, are present in the thin film. Therefore, the grain boundaries and surfaces of the perovskite thin film are the main sites of defects and are the main paths of non-radiative recombination of carriers.
Research shows that the open-circuit voltage and the short-circuit current of the photovoltaic cell have direct relation with the non-radiative recombination of carriers at crystal boundaries and surface defects, and the non-radiative recombination of the carriers at the crystal boundaries and the surface defects can reduce the open-circuit voltage and the short-circuit current, so that the photovoltaic performance of the cell is reduced. More importantly, degradation of the perovskite is usually initiated by defects at the surface and grain boundaries, which are more sensitive to water and oxygen. Therefore, with the recent development of perovskite solar cells, effective passivation of surface defects is of particular importance to further improve efficiency and stability.
In recent years, more and more research efforts have been directed to revealing the nature of surface defects in perovskite thin films and to eliminate their negative effects by defect passivation. Since organic-inorganic hybrid perovskite materials are ionic in nature, many surface defects are charged, e.g., uncoordinated Pb2+Ion, MA+/FA+Vacancies of formula I-Vacancies and some intrinsic defects, e.g. PbI3-These defects are accompanied by the crystal growth process, and are closely related to the microscopic conditions during the crystal growth process, and are extremely difficult to avoid. Due to the specificity of the surface defects of the perovskite thin film, a perovskite specific chemical passivation method is developed by introducing an organic material with specific functional groups and calciumThe titanium ore forms coordinate bonds and ionic bonds. For example, Noel et al found that thiophenes and pyridines could interact with p-Pb2+Ions form coordinate bonds to play a role in passivation. Other studies have demonstrated functional groups with lone pairs of electrons, e.g. -NH2-SH, as a Lewis base, donates an electron, with positively charged Pb2+The action, too, has a similar passivation effect. Unlike positively charged defects, negatively charged defects, e.g. I-And the like, need to be passivated by lewis acids, which are capable of accepting negatively charged unbound electrons. Fullerene (C) has been reported60) And its derivatives (PCBM, ICBA, etc.) interact with halogen-rich negatively charged defects, eliminating the hysteresis of the J-V curve. Both Lewis acids and Lewis bases can only deactivate one defect. The zwitterionic compound contains a positively charged part and a negatively charged part at the same time, so that two charged defects can be repaired. Fipronil et al report for the first time the effect of quaternary ammonium salts to effectively passivate charged defects.
The chemical passivation method improves the efficiency of the device on the one hand. On the other hand, the hydrophobic portion of the organic molecule functions to block water and oxygen, thereby improving the stability of the device. However, these existing methods have certain limitations. The passivated molecules are usually secondarily bonded to the surface of the perovskite, and the acting force is weak and not firm enough. Furthermore, not all defects, such as structural defects, which lead to degradation of the perovskite thin film, are effectively not covered by passivating molecules. And the mechanism of passivation is not fully understood. Therefore, it is crucial to explore a simple passivation method and study the passivation mechanism, and it is very challenging.
Therefore, the problems of the prior art are to be further improved and developed.
Disclosure of Invention
The object of the invention is: in order to solve the problems in the prior art, the invention aims to break through the limitations of the prior art, further improve the efficiency and stability of the perovskite solar cell in China, and is dedicated to design a novel passivation molecular structure to improve the efficiency and stability of the perovskite solar cell.
The technical scheme is as follows: in order to solve the technical problems:
the technical scheme provides a perovskite thin film with a passivation layer, which comprises the perovskite thin film, wherein the passivation layer is formed on the surface of the perovskite thin film by a modification solution through a spin-coating method and a soaking method; the passivation molecule of the passivation layer has a structural general formula as follows:
；
the passivating molecule is composed of three parts: aryl, alkyl and functional groups; the aryl group is: any one of arylene, heteroarylene, arylene vinylene, heteroarylene vinylene, arylene ethynylene, and heteroarylene ethynylene; y in the alkyl is more than or equal to 1; the functional group is any one of sulfydryl, amido, ammonium, sulfate, phosphate and sulfonate.
The perovskite thin film is prepared by dissolving passivation molecules in a solvent, wherein the solvent does not dissolve the perovskite at the lower layer.
The perovskite thin film is characterized in that the solvent is one of isopropanol, toluene, chlorobenzene, a mixed solvent of isopropanol and toluene and a mixed solvent of isopropanol and chlorobenzene. The perovskite thin film is characterized in that the passivating molecule is xylylenediamine iodate PDMAI, and the structure of the PDMAI is
(ii) a The functional group is NH3I; the aryl group is phenyl and the alkyl group has y = 1.
The perovskite thin film is prepared by a synthesis process of PDMAI: adding 0.2723g of p-xylylenediamine into 20mL of methanol, and stirring in an ice bath; 1.361g of hydriodic acid is added while stirring, then the ice bath is removed, the reaction solution is stirred for 3 hours at room temperature, and the solvent is removed by rotary evaporation to obtain a crude product of PDMAI; dissolving the PDMAI crude product in deionized water, and extracting with ethyl acetate for three times; organic phase after extractionOver anhydrous MgSO4Drying and rotary steaming.
A solar cell with a perovskite thin film comprises a substrate, an electron transport layer arranged on the substrate, a perovskite layer arranged on the electron transport layer, and a passivation layer arranged on the perovskite layer;
the passivation layer comprises passivation molecules, and the general structural formula of the passivation molecules is as follows:
；
the passivating molecule is composed of three parts: aryl, alkyl and functional groups; the aryl group is: any one of arylene, heteroarylene, arylene vinylene, heteroarylene vinylene, arylene ethynylene, and heteroarylene ethynylene; y in the alkyl is more than or equal to 1; the functional group is any one of sulfydryl, amido, ammonium, sulfate, phosphate and sulfonate.
The solar cell, wherein the passivation molecule is PDMAI, and the structure of the PDMAI is that
(ii) a The functional group is NH3I; the aryl group is phenyl and the alkyl group has y = 1.
The solar cell is characterized in that a saturated solution of PDMAI is spin-coated on the perovskite layer for 30s at the rotating speed of 4000rpm to form a passivation layer.
The solar cell, wherein the perovskite layer is a perovskite thin film having an n-i-p structure.
The solar cell is characterized in that the substrate is conductive ITO glass.
(III) the beneficial effects are as follows: the invention provides a perovskite thin film with a passivation layer and a solar cell with the perovskite thin film, wherein the passivation layer with a passivation effect is arranged on the surface of the perovskite thin film and comprises passivation molecules, and the passivation molecules are organic molecules, in particular to an organic molecular structure capable of improving the efficiency and stability of the perovskite solar cell. Functional groups at two ends of the passivation molecule can interact with perovskite to passivate charged defects. The aryl part in the middle of the passivation molecule is hydrophobic, can cover structural defects and isolate water and oxygen. The middle alkyl portion of the passivated molecule imparts some flexibility to the overall molecule, allowing the functional groups to rotate freely, increasing the likelihood of interaction with the perovskite. According to the perovskite thin film after passivation, as the passivation molecules of the passivation layer are characterized in that both ends of the aryl group have functional groups, the acting force between the passivation molecules and the perovskite is enhanced; more importantly, when functional groups at two ends act with perovskite, the middle aryl part can more effectively cover the surface of the perovskite and repair the structural defects; finally, the efficiency and the stability of the perovskite solar cell are improved.
Drawings
FIG. 1 is a schematic structural view of a solar cell having a perovskite thin film according to the present invention;
FIG. 2 is a J-V curve of a solar cell with a PDMAI passivation layer;
FIG. 3 is a surface SEM of a perovskite thin film with a PDMAI passivation layer;
FIG. 4 is a J-V curve for a solar cell with PDAI passivation layer;
fig. 5 is a surface SEM of a perovskite thin film with PDAI passivation layer.
Detailed Description
The present invention will be described in further detail with reference to preferred embodiments, and more details are set forth in the following description in order to provide a thorough understanding of the present invention, but it is apparent that the present invention can be embodied in many other forms different from the description herein and can be similarly generalized and deduced by those skilled in the art based on the practical application without departing from the spirit of the present invention, and therefore, the scope of the present invention should not be limited by the contents of this detailed embodiment.
The drawings are schematic representations of embodiments of the invention, and it is noted that the drawings are intended only as examples and are not drawn to scale and should not be construed as limiting the true scope of the invention.
According to the perovskite film provided by the invention, the passivation layer is formed on the surface of the perovskite film by adopting the spin coating method and the soaking method for the modification solution. The modification solution is prepared by dissolving passivation molecules in a solvent, wherein the solvent does not dissolve the perovskite on the lower layer, and preferably is one of isopropanol, toluene, chlorobenzene, a mixed solvent of isopropanol and toluene, and a mixed solvent of isopropanol and chlorobenzene.
The general structural formula of the passivation molecule is as follows:
the passivating molecule is composed of three parts: aryl, alkyl and functional groups; wherein aryl groups may each be: any one of arylene, heteroarylene, arylene vinylene, heteroarylene vinylene, arylene ethynylene, and heteroarylene ethynylene; y in the alkyl is more than or equal to 1; the functional group can be any one of sulfydryl, amido, ammonium, sulfate, phosphate and sulfonate.
In a preferred embodiment of the passivation molecule of the present invention, the passivation molecule is xylylenediamine iodate PDMAI (p-phenyl dimethyllammonium iodide).
When the functional group is NH3When I is adopted, aryl is phenyl, y =1 in the alkyl, and the passivation molecule is PDMAI with the structure of
The PDMAI is a passivation molecule with ammonium groups at two ends and phenyl in the middle, and a modification solution with the passivation molecule is required to be spin-coated on the perovskite thin film to form the passivation layer on the surface of the perovskite thin film.
The synthesis process of the PDMAI comprises the following steps: 0.2723g of p-xylylenediamine was added to 20mL of methanol, and the mixture was stirred in an ice bath. 1.361g of hydroiodic acid was added with stirring, the ice bath was removed, the reaction was stirred at room temperature for 3h, and the solvent was removed by rotary evaporation to give crude PDMAI. Coarse PDMAIThe product was dissolved in deionized water and extracted three times with ethyl acetate. The extracted organic phase is passed through anhydrous MgSO4Drying and rotary evaporation are carried out to obtain light yellow solid PDMAI.
The scanning electron microscope SEM image of the perovskite thin film with the PDMAI passivation layer is shown in figure 3.
The perovskite thin film with the PDMAI passivation layer can be applied to all perovskite photoelectric devices, wherein the perovskite photoelectric devices comprise perovskite solar cells, perovskite light-emitting diodes, perovskite detectors and the like.
The perovskite solar cell device has a structure shown in figure 1, and comprises a substrate made of conductive ITO glass, an electron transport layer arranged on the substrate, and preferably tin oxide SnO2An electron transport layer, wherein a perovskite layer is arranged on the electron transport layer, a passivation layer is arranged on the perovskite layer, the passivation layer can be a PDMAI passivation layer, and 2,2',7,7' -tetra [ N, N-di (4-methoxyphenyl) amino is spin-coated on the passivation layer]-a 9,9' -spirobifluorene (spiro-OMeTAD) hole transport layer, on top of which an electrode is arranged.
The passivation layer of the solar cell comprises passivation molecules, and the general structural formula of the passivation molecules is as follows:
；
the passivating molecule is composed of three parts: aryl, alkyl and functional groups; the aryl group is: any one of arylene, heteroarylene, arylene vinylene, heteroarylene vinylene, arylene ethynylene and heteroarylene ethynylene, wherein in the structural formula, x is more than or equal to 1; y in the alkyl is more than or equal to 1; the functional group is any one of sulfydryl, amido, ammonium, sulfate, phosphate and sulfonate.
According to the solar cell with the perovskite thin film, the conductive ITO substrate of the substrate is sequentially ultrasonically cleaned for 20 minutes by using a conventional detergent aqueous solution, deionized water, acetone and isopropanol, and then is dried by nitrogen to obtain a clean conductive substrate for later use; before use, the surface was hydrophilized by ultraviolet ozone treatment for 20 minutes using an ultraviolet ozone cleaning machine.
The tin oxide SnO2An electron transport layer is prepared by first preparing SnO2The hydrosol of (2), the SnO2The hydrosol of (A) is SnO with a content of 15%2The hydrosol is obtained by diluting in ammonia water according to the dilution ratio of 1: 3. Then SnO the electron transport material2The hydrosol is coated for 30s in a spinning mode at the rotating speed of 4000rpm, and is annealed for 30min at the temperature of 150 ℃ to obtain an electron transmission layer with the thickness of 20-60 nm.
Preparation of PbI2Solution of said PbI2The solution is 1.5M in concentration, and the solvent is a mixture of 9: 1 DMF and DMSO mixed solvent, specifically 691.5mg PbI2Dissolved in 900uL DMF and 100uL DMSO.
The SnO2Carrying out ultraviolet ozone treatment on the substrate after electron transmission cooling for 15min again, and then carrying out PbI treatment2The solution was spin coated at 1500rpm for 30s, annealed at 70 ℃ for 1min, and cooled to room temperature. A mixed solution of FAI (Formamidinium iodide), MAI (methylamine iodide) and MACl (methylamine hydrochloride), including a mixed solution of 90mg of FAI, 6.39mg of MAI and 9mg of MACl in 1mL of isopropanol, was mixed in PbI at 2000rpm2Spin coating the layer for 30s, and annealing at 150 deg.C for 20min to form perovskite layer.
And spin-coating the saturated PDMAI solution on the perovskite layer for 30s at the rotating speed of 4000rpm to form a passivation layer.
The spin-OMeTAD solution was spin-coated on the passivation layer at 3000rpm for 30 seconds to form a hole transport layer. The composition of the spiro-OMeTAD solution was 72.3mg of a mixed solution of spiro-OMeTAD, 30uL of 4-tert-butylpyridine and 35uL of lithium bistrifluoromethanesulfonylimide in acetonitrile (concentration 260mg/mL), 1mL of chlorobenzene. Finally, 100nm gold is evaporated to be used as an electrode.
The results of the J-V (Current Density vs. Voltage characteristic) test of the perovskite solar cell, as shown in FIG. 2, are shownThe average efficiency (15 cells) of the solar cell with the PDMAI passivation layer is 20.99%, the highest efficiency is 21.46%, and the specific parameters are as follows: short-circuit current: 24.261028mA/cm2Open circuit voltage: 1100.006mV, fill factor: 0.804476.
the perovskite thin film and the solar cell comprising the perovskite thin film have the advantages that as the passivation layer comprises PDMAI, the passivation mechanism for obtaining PDMAI is innovative: the first is that PDMAI can reduce FA+/I-Vacancy, secondly, PDMAI can eliminate excess PbI2And the third is that the structural defects can be effectively inhibited, the interface recombination is reduced, the carrier collection is improved, and the efficiency and the stability of the perovskite solar cell are improved. The invention has the advantages that: the average efficiency of the perovskite solar cell modified by the PDMAI is improved from 19.69% to 20.99%, and the highest efficiency is 21.46%.
In another embodiment of the passivating molecule of the present invention, the passivating molecule is PDAI (p-phenylene diamine iodate). The PDAI includes when the functional group is-NH3When I, aryl is phenyl, y =0, the structure of the passivating molecule PDAI is:
the synthesis process of the passivated molecule PDAI comprises the following steps: 0.2163g of p-phenylenediamine was added to 20mL of methanol, and the mixture was stirred in an ice bath at 0 ℃. 1.361g of hydroiodic acid was added with stirring, the ice bath was removed, the reaction was stirred at room temperature for 3 hours, and the solvent was removed by rotary evaporation to give a crude product of PDAI. The PDAI crude product was dissolved in deionized water and extracted three times with ethyl acetate. The extracted organic phase is passed through anhydrous MgSO4Drying and rotary evaporation are carried out to obtain light yellow solid PDAI.
The scanning electron microscope SEM image of the perovskite thin film with the PDAI passivation layer is shown in FIG. 5.
The solar cell with the perovskite thin film comprises a substrate made of conductive ITO glass, wherein an electron transmission layer is arranged on the substrate, and the electron transmission layer is preferably selectedIs tin oxide SnO2The electron transport layer is provided with a perovskite layer, a PDAI passivation layer is spin-coated on the perovskite layer, and 2,2',7,7' -tetra [ N, N-di (4-methoxyphenyl) amino group is spin-coated on the passivation layer]-a 9,9' -spirobifluorene (spiro-OMeTAD) hole transport layer, on top of which an electrode is arranged.
According to the solar cell with the perovskite thin film, the conductive ITO substrate of the substrate is sequentially subjected to ultrasonic cleaning for 15min by using a conventional detergent aqueous solution, deionized water, acetone and isopropanol, and is subjected to Ultraviolet (UV) -ozone treatment for 20min after being dried.
The tin oxide SnO2An electron transport layer is prepared by first preparing SnO2The hydrosol of (2), the SnO2The hydrosol of (A) is SnO with a content of 15%2The hydrosol is obtained by diluting in ammonia water according to the dilution ratio of 1: 3. Then SnO the electron transport material2The hydrosol is coated for 30s in a spinning mode at the rotating speed of 4000rpm, and is annealed for 30min at the temperature of 150 ℃ to obtain an electron transmission layer with the thickness of 20-60 nm.
Preparation of PbI2Solution of said PbI2The solution is 1.5M in concentration, and the solvent is a mixture of 9: 1 DMF and DMSO mixed solvent, specifically 691.5mg PbI2Dissolved in 900uL DMF and 100uL DMSO.
The SnO2Carrying out ultraviolet ozone treatment on the substrate after electron transmission cooling for 15min again, and then carrying out PbI treatment2The solution was spin coated at 1500rpm for 30s, annealed at 70 ℃ for 1min, and cooled to room temperature. A mixed solution of FAI (Formamidinium iodide), MAI (methylamine iodide) and MACl (methylamine hydrochloride), including a mixed solution of 90mg of FAI, 6.39mg of MAI and 9mg of MACl in 1mL of isopropanol, was mixed in PbI at 2000rpm2Spin coating the layer for 30s, and annealing at 150 deg.C for 20min to form perovskite layer.
The saturated solution of PDAI was spin coated on the perovskite for 30s at 4000rpm to form the passivation layer.
The spin-OMeTAD solution was spin-coated on the passivation layer for 30 seconds at rpm to form a hole transport layer. The composition of the spiro-OMeTAD solution was 72.3mg of a mixed solution of spiro-OMeTAD, 30uL of 4-tert-butylpyridine and 35uL of lithium bistrifluoromethanesulfonylimide in acetonitrile (concentration 260mg/mL), 1mL of chlorobenzene. Finally, 100nm gold is evaporated to be used as an electrode.
The J-V (current density versus voltage characteristic curve) test result of the solar cell with the perovskite thin film with the passivation molecule being PDAI in the invention is shown in fig. 4, and the device efficiency 16.649906% of the solar cell with the passivation layer having PDAI has the following specific parameters: short-circuit current: 23.489775mA/cm2And, open circuit voltage: 980.06615mV, fill factor: 0.723232. the efficiency of the solar cell passivated with PDAI is significantly reduced. PDAI has only one methylene group less than PDMAI. This example demonstrates that the alkyl moiety imparts some flexibility to the overall molecule, allowing the functional group to rotate freely, increasing the probability of interaction with the perovskite, and is important to whether the passivating molecule will perform its passivating function.
According to the perovskite thin film and the solar cell with the perovskite thin film, the passivation layer with the passivation effect is arranged on the surface of the perovskite thin film and comprises passivation molecules, and the passivation molecules are organic molecules, and particularly have an organic molecular structure capable of improving the efficiency and stability of the perovskite solar cell.
The invention aims to provide the perovskite thin film and the perovskite layer of the solar cell, wherein the perovskite thin film has an n-i-p structure, and the passivation layer can eliminate the charged defect of the perovskite thin surface with the n-i-p structure, enhance the acting force between the passivation molecules and the perovskite and effectively cover the structural defect. The general formula of the passivation molecule structure of the passivation layer is
(ii) a The aryl group may be: any one of arylene, heteroarylene, arylene vinylene, heteroarylene vinylene, arylene ethynylene and heteroarylene ethynylene, and x is more than or equal to 1; y in the alkyl is more than or equal to 1; the functional group can be any one of sulfydryl, amido, ammonium, sulfate, phosphate and sulfonate.
The invention can form a passivation layer on the surface of the perovskite film by adopting a spin coating method and a soaking method. Wherein the functional group is any one of sulfate, phosphate and sulfonate. The passivation layer needs to be annealed at 100 ℃ for 5-10 min.
The functional groups at two ends of the passivation molecule can interact with perovskite to passivate charged defects. The aryl part in the middle of the passivation molecule is hydrophobic, can cover structural defects and isolate water and oxygen. The middle alkyl portion of the passivated molecule imparts some flexibility to the overall molecule, allowing the functional groups to rotate freely, increasing the likelihood of interaction with the perovskite. According to the perovskite thin film after passivation, as the passivation molecules of the passivation layer are characterized in that both ends of the aryl group have functional groups, the acting force between the passivation molecules and the perovskite is enhanced; more importantly, when functional groups at two ends act with perovskite, the middle aryl part can more effectively cover the surface of the perovskite and repair the structural defects; ultimately improving the efficiency of the perovskite solar cell.
The above description is provided for the purpose of illustrating the preferred embodiments of the present invention and will assist those skilled in the art in more fully understanding the technical solutions of the present invention. However, these examples are merely illustrative, and the embodiments of the present invention are not to be considered as being limited to the description of these examples. For those skilled in the art to which the invention pertains, several simple deductions and changes can be made without departing from the inventive concept, and all should be considered as falling within the protection scope of the invention.
Claims (10)
1. A perovskite film with a passivation layer comprises a perovskite film and is characterized in that a passivation layer is formed on the surface of the perovskite film by a modification solution through a spin-coating method and a soaking method; the passivation molecule of the passivation layer has a structural general formula as follows:
；
the passivating molecule is composed of three parts: aryl, alkyl and functional groups; the aryl group is: any one of arylene, heteroarylene, arylene vinylene, heteroarylene vinylene, arylene ethynylene, and heteroarylene ethynylene; y in the alkyl is more than or equal to 1; the functional group is any one of sulfydryl, amido, ammonium, sulfate, phosphate and sulfonate.
2. The perovskite thin film as claimed in claim 1, wherein the modification solution is prepared by dissolving the passivating molecules in a solvent which does not dissolve the underlying perovskite.
3. The perovskite thin film as claimed in claim 2, wherein the solvent is one of isopropanol, toluene, chlorobenzene, a mixed solvent of isopropanol and toluene, and a mixed solvent of isopropanol and chlorobenzene.
4. The perovskite thin film as claimed in claim 1, wherein the passivating molecule is p-xylylenediamine iodate PDMAI, and the structure of the PDMAI is
(ii) a The functional group is NH3I; the aryl group is phenyl and the alkyl group has y = 1.
5. The perovskite thin film as claimed in claim 4, wherein the PDMAI is synthesized by the following steps: adding 0.2723g of p-xylylenediamine into 20mL of methanol, and stirring in an ice bath; 1.361g of hydriodic acid is added while stirring, then the ice bath is removed, the reaction solution is stirred for 3 hours at room temperature, and the solvent is removed by rotary evaporation to obtain a crude product of PDMAI; dissolving the PDMAI crude product in deionized water, and extracting with ethyl acetate for three times; the extracted organic phase is passed through anhydrous MgSO4Drying and rotary steaming.
6. The solar cell with the perovskite thin film is characterized by comprising a substrate, wherein an electron transmission layer is arranged on the substrate, a perovskite layer is arranged on the electron transmission layer, and a passivation layer is arranged on the perovskite layer;
the passivation layer comprises passivation molecules, and the general structural formula of the passivation molecules is as follows:
(ii) a The passivating molecule is composed of three parts: aryl, alkyl and functional groups; the aryl group is: any one of arylene, heteroarylene, arylene vinylene, heteroarylene vinylene, arylene ethynylene, and heteroarylene ethynylene; y in the alkyl is more than or equal to 1; the functional group is any one of sulfydryl, amido, ammonium, sulfate, phosphate and sulfonate.
7. The solar cell of claim 6, wherein the passivating molecule is xylylenediamine iodate (PDMAI) having the structure
(ii) a The functional group is NH3I; the aryl group is phenyl and the alkyl group has y = 1.
8. The solar cell of claim 7, wherein the passivation layer is formed by spin coating a saturated solution of PDMAI on the perovskite layer at 4000rpm for 30 seconds.
9. The solar cell according to claim 6, wherein the perovskite layer is a perovskite thin film of an n-i-p structure.
10. The solar cell of claim 6, wherein the substrate is conductive ITO glass.
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| CN111710784A (en) * | 2020-06-18 | 2020-09-25 | 浙江浙能技术研究院有限公司 | Perovskite suspension state precursor liquid and film forming method |
| CN111892504A (en) * | 2020-06-11 | 2020-11-06 | 南京邮电大学 | Diamino organic compound passivation material and application thereof |
| CN112103393A (en) * | 2020-09-18 | 2020-12-18 | 隆基绿能科技股份有限公司 | Plasmon structure and perovskite photoelectric device |
| CN112349848A (en) * | 2020-10-14 | 2021-02-09 | 浙江师范大学 | Preparation method of P-phenyl dimethyl ammonium iodide passivated tin-lead mixed perovskite solar cell |
| CN112467038A (en) * | 2020-12-22 | 2021-03-09 | 厦门大学 | Method for passivating perovskite thin film layer and perovskite solar cell |
| CN112635679A (en) * | 2020-12-29 | 2021-04-09 | 中国科学院青岛生物能源与过程研究所 | Method for improving open-circuit voltage of organic-inorganic hybrid perovskite solar cell |
| CN113193117A (en) * | 2021-04-30 | 2021-07-30 | 南开大学 | Perovskite solar cell based on p-methoxyphenylacetic acid passivator |
| CN113193116A (en) * | 2021-03-31 | 2021-07-30 | 南京信息工程大学 | Water system perovskite photoelectric conversion system |
| CN113224239A (en) * | 2021-03-15 | 2021-08-06 | 南开大学 | In-situ generated water and thermal stable passivation layer and perovskite solar cell with same |
| CN113421979A (en) * | 2021-07-08 | 2021-09-21 | 合肥工业大学 | Perovskite thin film vapor phase passivation method and photovoltaic device based on same |
| WO2023109441A1 (en) * | 2021-12-14 | 2023-06-22 | 昆山协鑫光电材料有限公司 | Composition, and perovskite thin film and preparation method therefor and use thereof |
| CN116669449A (en) * | 2023-08-02 | 2023-08-29 | 宁德时代新能源科技股份有限公司 | Perovskite solar cell, preparation method thereof and electric equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111628091A (en) * | 2020-06-08 | 2020-09-04 | 西北工业大学 | Method for improving quality of perovskite thin film through solvent bath auxiliary heat treatment |
| CN111892504A (en) * | 2020-06-11 | 2020-11-06 | 南京邮电大学 | Diamino organic compound passivation material and application thereof |
| CN111892504B (en) * | 2020-06-11 | 2023-04-07 | 南京邮电大学 | Diamino organic compound passivation material and application thereof |
| CN111710784B (en) * | 2020-06-18 | 2023-04-07 | 浙江浙能技术研究院有限公司 | Perovskite suspension state precursor liquid and film forming method |
| CN111710784A (en) * | 2020-06-18 | 2020-09-25 | 浙江浙能技术研究院有限公司 | Perovskite suspension state precursor liquid and film forming method |
| CN112103393A (en) * | 2020-09-18 | 2020-12-18 | 隆基绿能科技股份有限公司 | Plasmon structure and perovskite photoelectric device |
| CN112103393B (en) * | 2020-09-18 | 2023-10-10 | 隆基绿能科技股份有限公司 | Plasmon structure and perovskite photoelectric device |
| CN112349848A (en) * | 2020-10-14 | 2021-02-09 | 浙江师范大学 | Preparation method of P-phenyl dimethyl ammonium iodide passivated tin-lead mixed perovskite solar cell |
| CN112467038A (en) * | 2020-12-22 | 2021-03-09 | 厦门大学 | Method for passivating perovskite thin film layer and perovskite solar cell |
| CN112467038B (en) * | 2020-12-22 | 2023-10-27 | 厦门大学 | Method for passivating perovskite thin film layer and perovskite solar cell |
| CN112635679A (en) * | 2020-12-29 | 2021-04-09 | 中国科学院青岛生物能源与过程研究所 | Method for improving open-circuit voltage of organic-inorganic hybrid perovskite solar cell |
| CN113224239A (en) * | 2021-03-15 | 2021-08-06 | 南开大学 | In-situ generated water and thermal stable passivation layer and perovskite solar cell with same |
| CN113193116A (en) * | 2021-03-31 | 2021-07-30 | 南京信息工程大学 | Water system perovskite photoelectric conversion system |
| CN113193116B (en) * | 2021-03-31 | 2023-06-02 | 南京信息工程大学 | Water system perovskite photoelectric conversion system |
| CN113193117A (en) * | 2021-04-30 | 2021-07-30 | 南开大学 | Perovskite solar cell based on p-methoxyphenylacetic acid passivator |
| CN113421979A (en) * | 2021-07-08 | 2021-09-21 | 合肥工业大学 | Perovskite thin film vapor phase passivation method and photovoltaic device based on same |
| WO2023109441A1 (en) * | 2021-12-14 | 2023-06-22 | 昆山协鑫光电材料有限公司 | Composition, and perovskite thin film and preparation method therefor and use thereof |
| CN116669449A (en) * | 2023-08-02 | 2023-08-29 | 宁德时代新能源科技股份有限公司 | Perovskite solar cell, preparation method thereof and electric equipment |
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