Perovskite precursor solution, perovskite solar cell and photovoltaic system
By adding organic amine as a modified agent to the precursor solution of the perovskite, it is directly doped into the perovskite porphyle solution, which solves the problem of decline in the performance of perovskite solar cells in the oxygen environment, and achieves simplified technology and reduced the process, reducing it The effect of cost and improvement of battery efficiency.
Patent Information
- Application Number
- CN202411489686.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-24
- Publication Date
- 2025-01-21
AI Technical Summary
Perovskite solar cells are susceptible to environmental factors such as water and oxygen, which lead to ion migration, non-radiative recombination and perovskite body decomposition, thereby reducing battery performance. The prior art requires the body phase passivation and surface treatment of perovskites through multiple steps, which are cumbersome in operation and increase production costs.
A perovskite precursor solution containing organic amines is used, and the modifier is directly doped into the perovskite mother solution to achieve bulk passivation and surface modification of the perovskite, simplifying the process and reducing production costs.
This method can effectively reduce production costs, simplify process processes, and greatly optimize battery performance, and improve the photoelectric conversion efficiency of perovskite solar cells.
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Figure CN119343033A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of solar cells, and in particular to a perovskite precursor solution, a perovskite solar cell and a photovoltaic system. Background Art
[0002] Perovskite solar cells have become one of the most promising thin-film photovoltaic technologies due to their excellent photovoltaic performance. However, perovskite solar cells are still susceptible to a series of problems due to environmental factors such as water and oxygen, including ion migration, non-radiative recombination, and perovskite body decomposition, which leads to a decrease in battery performance. To address the above problems, related technologies require multi-step processes to passivate the perovskite body and perform surface treatment, which is cumbersome and increases production costs.
[0003] It should be noted that the above content is not necessarily prior art, nor is it intended to limit the scope of patent protection of this application. Summary of the invention
[0004] The embodiments of the present application provide a perovskite precursor solution, a perovskite solar cell and a photovoltaic system to solve or alleviate one or more of the technical problems raised above.
[0005] As one aspect of an embodiment of the present application, an embodiment of the present application provides a perovskite precursor solution for preparing a perovskite layer of a perovskite solar cell, wherein the perovskite precursor solution comprises a perovskite material, a modifier and an organic solvent; Wherein, the modifier includes organic amine.
[0006] Optionally, the organic amine includes one or more of 1H,1H-undecylfluorohexylamine, 1H,1H-heptafluorobutylamine, 1H,1H-heptadecafluorononylamine, N-ethylmethylamine, and N,N-dimethylethylamine.
[0007] Optionally, the general structural formula of the perovskite material is ABX3; Wherein, A is a monovalent cation, including one or more monovalent cations of cesium, rubidium, methylamine, and guanidine; B is a divalent cation, including one or more divalent cations of lead, copper, zinc, gallium, tin, and calcium; X is a monovalent anion, including one or more monovalent anions of iodine, bromine, chlorine, fluorine, and thiocyanate.
[0008] Optionally, the organic solvent includes one or more of N,N-dimethylformamide, dimethyl sulfoxide, acetonitrile, N-methylpyrrolidone, 2-mercaptoethanol, γ-butyrolactone, and γ-valerolactone.
[0009] Optionally, the volume of the fluoroquinolone is 0.1%-10% of the volume of the perovskite precursor solution.
[0010] As another aspect of the embodiment of the present application, the embodiment of the present application further provides a perovskite solar cell, comprising: substrate; A transparent conductive layer is disposed on one side of the substrate; A first transmission layer, disposed on a side of the transparent conductive layer away from the substrate; a perovskite layer, disposed on a side of the first transmission layer away from the transparent conductive layer; A second transmission layer is provided on a side of the perovskite layer away from the first transmission layer; A metal electrode layer, disposed on a side of the second transmission layer away from the perovskite layer; Wherein, the raw materials of the perovskite layer include perovskite material, organic amine and organic solvent.
[0011] Optionally, the organic amine includes one or more of 1H,1H-undecylfluorohexylamine, 1H,1H-heptafluorobutylamine, 1H,1H-heptadecafluorononylamine, N-ethylmethylamine, and N,N-dimethylethylamine.
[0012] Optionally, the thickness of the perovskite layer is 10 to 10 5 nm, and the band gap is 0.9~3.0eV.
[0013] Optionally, the substrate has a thickness of 1-5 mm, the transparent conductive layer has a thickness of 50-300 nm, and the metal electrode layer has a thickness of 50-150 nm.
[0014] As another aspect of the embodiments of the present application, the embodiments of the present application also provide a photovoltaic system, including any of the above-mentioned perovskite solar cells.
[0015] The above technical solution adopted in the embodiment of the present application may have the following advantages: The embodiment of the present application uses a perovskite precursor solution to which a modifier is added to prepare a perovskite layer of a perovskite solar cell. The modifier may include an organic amine. The embodiment of the present application uses an organic amine as a modifier and directly dopes it into a perovskite precursor solution, which can simultaneously achieve bulk passivation and surface modification of the perovskite, is easy to operate, and can effectively reduce production costs and significantly optimize battery performance. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in the present application and should not be regarded as limiting the scope of the present application.
[0017] Figure 1 It is a schematic diagram of the structure of the perovskite solar cell provided in Example 2 of the present application.
[0018] Figure 2 This is another schematic diagram of the structure of the perovskite solar cell provided in Example 2 of the present application.
[0019] Description of reference numerals: 1 Base 2 Transparent conductive layer 3 First Transport Layer 4 Perovskite layer 5 Second Transport Layer 6 Metal electrode layer 7 Buffer layer 8 Passivation layer. DETAILED DESCRIPTION
[0020] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings. In the accompanying drawings, for clarity, the sizes of layers, regions, elements and their relative sizes may be exaggerated. Wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limitations on the present application. It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.
[0021] It should be understood that when an element or layer is referred to as "on ...", "adjacent to ...", "connected to" or "coupled to" other elements or layers, it can be directly on, adjacent to, connected to or coupled to other elements or layers, or there can be intervening elements or layers. On the contrary, when an element is referred to as "directly on ...", "directly adjacent to ...", "directly connected to" or "directly coupled to" other elements or layers, there is no intervening element or layer. It should be understood that although the terms first, second, third, etc. can be used to describe various elements, components, regions, layers and / or parts, these elements, components, regions, layers and / or parts should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or part from another element, component, region, layer or part. Therefore, without departing from the teachings of the present disclosure, the first element, component, region, layer or part discussed below can be represented as the second element, component, region, layer or part. And when the second element, component, region, layer or part is discussed, it does not mean that the present disclosure necessarily has the first element, component, region, layer or part.
[0022] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0023] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.
[0024] The embodiment of the present application provides a perovskite precursor solution, a perovskite solar cell and a photovoltaic system. In this technical solution: using fluoroamine with high hydrophobicity and high polarity groups as a modifier, directly doping it into the perovskite mother solution (precursor solution), it can simultaneously achieve bulk passivation and surface treatment of the perovskite, which is easy to operate, can effectively reduce production costs and improve battery efficiency. See below for details.
[0025] Hereinafter, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. It should be noted that these exemplary embodiments can be implemented in many different forms and should not be construed as being limited to the embodiments described herein.
[0026] Embodiment 1 The present application provides a perovskite precursor solution that can be used to prepare a perovskite layer (also known as a perovskite light-absorbing layer or a perovskite active layer) of a perovskite solar cell. For example, the perovskite precursor solution can be prepared into a perovskite layer by spin coating, slit coating, blade coating, spray coating, screen printing, inkjet printing, and other processes.
[0027] The following is an exemplary introduction to the various components of the perovskite precursor solution.
[0028] The perovskite precursor solution may include a perovskite material, a modifier and an organic solvent. The modifier may include an organic amine. The organic amine refers to an organic compound containing an amino group. In an optional embodiment, the organic amine may include one or more of 1H,1H-undecylfluorohexylamine, 1H,1H-heptafluorobutylamine, 1H,1H-heptafluorononylamine, N-ethylmethylamine, and N,N-dimethylethylamine.
[0029] Especially fluoroquinolone, the role of the modifier is introduced below using fluoroquinolone as an example.
[0030] As a hydrophobic fluid, fluoroquinolone is soluble in polar liquids or organic solvents and can exist on the upper surface of perovskite during the crystallization process of perovskite. Based on the high hydrophobicity of fluoroquinolone, the negative impact of water molecules on perovskite crystallization can be alleviated, thereby reducing the defect density of the crystal termination surface and reducing non-radiative recombination.
[0031] The molecular formula of fluoroquinolone is C9F 21 N, its chemical structure is as follows: .
[0032] It can be seen that there are multiple polar groups (-CF3, trifluoromethyl) in fluoroamine. Highly polar groups (-CF3, trifluoromethyl) can effectively adjust the crystal orientation of the perovskite surface and improve the efficiency of carrier transmission between interfaces, thereby reducing ion migration and perovskite decomposition.
[0033] It can be seen that the perovskite precursor solution provided in the present embodiment includes a perovskite material, a modifier and an organic solvent. Among them, the modifier may include an organic amine. The present application embodiment directly dopes the modifier into the perovskite precursor solution to prepare the perovskite layer of the perovskite solar cell, which can simultaneously achieve bulk passivation and surface modification of the perovskite layer, is easy to operate, can effectively reduce production costs and greatly optimize battery performance. It should be noted that the perovskite solar cell is only used as an example, and the modifier can also be used in other types of solar cells.
[0034] In an optional embodiment, the volume of the modifier is 0.1%-10% of the volume of the perovskite precursor solution. Exemplarily, the volume of fluoroamine can be 0.1%-10% of the volume of the perovskite precursor solution.
[0035] In this embodiment, the volume of the modifier is controlled between one thousandth and ten percent of the volume of the perovskite precursor solution, which can balance the bulk passivation and surface treatment effects and further improve the battery efficiency. Specifically, if the volume of the modifier is too high, it will affect the volatilization of the solvent, and if the volume of the modifier is too low, it will not be able to effectively reduce the defects of the crystal termination surface. Exemplarily, the amount of the modifier fluoroamine added can be 1%, 3%, 5%, or 10% of the volume of the perovskite precursor solution.
[0036] The above-mentioned multiple embodiments introduce the chemical structure, functional characteristics and dosage of the modifier, which is one of the components of the perovskite precursor solution. The following will further exemplify the other components of the perovskite precursor solution in combination with multiple embodiments.
[0037] In an optional embodiment, the perovskite material has a three-dimensional structure, and its general structural formula may be: ABX3. Wherein A is a monovalent cation, including but not limited to a cesium ion (Cs + ), rubidium ions (Rb + ), methylamine cation (CH3NH3 + ), carboxamidino cation (CH2(NH2)2 + ) is a mixture of one or more of the following. B is a divalent cation, including but not limited to lead ion (Pb 2+ ), copper ions (Cu 2+ )、Zn ion(Zn 2+ ), gallium ions (Ga 2+ ), tin ions (Sn 2+ ), calcium ions (Ca 2+ ) is a mixture of one or more of the following. X is a monovalent anion, including but not limited to iodide ion (I - ), bromide ion (Br - ), chloride ion (Cl - ), fluoride ion (F -), thiocyanate ion (SCN - ) is a mixture of one or more of the following.
[0038] For example, the perovskite material may be lead iodide methylamine (CH3NH3PbI3), which may be prepared by PbI2 (lead iodide) and CH3NH3I (iodine methylamine).
[0039] In an optional embodiment, the organic solvent may include one or more of N,N-dimethylformamide, dimethyl sulfoxide, acetonitrile, N-methylpyrrolidone, 2-mercaptoethanol, γ-butyrolactone, and γ-valerolactone. Such organic solvents have good compatibility with the modifier and the perovskite material, making it easier to prepare the perovskite precursor solution and saving production time.
[0040] Embodiment 2 like Figure 1 As shown, the embodiment of the present application further provides a perovskite solar cell. The solar cell may include: a substrate 1, a transparent conductive layer 2, a first transmission layer 3, a perovskite layer 4, a second transmission layer 5 and a metal electrode layer 6.
[0041] It should be noted that Figure 1 Only a single-junction perovskite solar cell with an inverted structure is schematically shown. In an optional embodiment, the perovskite solar cell may be a single-junction perovskite solar cell or a stacked perovskite solar cell. A single-junction perovskite solar cell has only one PIN junction. A stacked perovskite solar cell may be a perovskite stacked with a perovskite, a crystalline silicon or a thin-film cell (such as copper indium gallium selenide (CIGS), gallium nitride (GaN), etc.), and may have multiple light-absorbing layers (multiple PIN junctions). Since various materials have different band gaps, stacks of different materials can absorb light of different spectra respectively, further improving the photoelectric conversion efficiency. Of course, two perovskites with different band gaps may also be stacked to improve the cell efficiency. In an optional embodiment, the stacked perovskite solar cell may be a two-terminal stacked perovskite solar cell, a three-terminal stacked perovskite solar cell or a four-terminal stacked perovskite solar cell. In an optional embodiment, the perovskite solar cell may also be divided into a formal structure (nip type) and an inverted structure (pin type) according to different charge transfer directions.
[0042] The structure of each layer of the perovskite solar cell and its coordination with other layers will be further introduced as an example below.
[0043] The substrate 1 may be transparent glass for forming a single-junction perovskite solar cell. Accordingly, in a stacked perovskite solar cell, the substrate 1 may also be a silicon cell, a copper indium gallium selenide (CIGS) cell, a gallium nitride (GaN) cell, an amorphous silicon (a-Si) cell, a perovskite cell, etc. In some embodiments, the thickness of the substrate 1 may be 1 to 5 mm.
[0044] The transparent conductive layer 2 can be arranged on one side or the conductive side of the substrate 1, and can be used to transmit sunlight and carriers. The transparent conductive layer 2 can include one or more of fluorine tin oxide (FTO), indium tin oxide (ITO), indium zinc oxide (IZO), tungsten-doped indium oxide (IWO), and aluminum-doped zinc oxide (AZO). Such materials have good transparency and conductivity, allowing light to pass through and be absorbed by the perovskite layer 4 and effectively transmit carriers. In some embodiments, the thickness of the transparent conductive layer 2 can be 20 to 300 nm.
[0045] The first transmission layer 3 can be arranged on the side of the transparent conductive layer 2 away from the substrate 1 , the perovskite layer 4 can be arranged on the side of the first transmission layer 3 away from the transparent conductive layer 2 , and the second transmission layer 5 can be arranged on the side of the perovskite layer 4 away from the first transmission layer 3 .
[0046] The perovskite layer 4 can be made by using any perovskite precursor solution as described in Example 1 through spin coating, slit coating, blade coating, spray coating, screen printing, inkjet printing and other processes. The high hydrophobicity and high polarity groups of the modifier can alleviate the negative impact of water molecules on the crystallization of perovskite, and can also adjust the crystal orientation of the perovskite surface and improve the transmission efficiency of carriers between interfaces. At the same time, the bulk passivation and surface treatment of the perovskite are achieved, which is easy to operate, can effectively reduce production costs and improve the photoelectric conversion efficiency of the battery, thereby optimizing the battery performance. In an optional embodiment, the thickness of the perovskite layer 4 can be 10~10 5 nm, and the band gap can be 0.9~3.0eV.
[0047] For the first transmission layer 3 and the second transmission layer 5: Figure 1 As shown, in the inverted pin-type perovskite solar cell, the first transport layer 3 is a hole transport layer, and the second transport layer 5 is an electron transport layer. Figure 2 As shown, in the formal structure pin-type perovskite solar cell, the first transport layer 3 is correspondingly an electron transport layer, and the second transport layer 5 is correspondingly a hole transport layer. Through the first transport layer 3 and the second transport layer 5, the electrons and holes generated by the perovskite layer 4 after light absorption can be effectively separated and transported, thereby generating current.
[0048] In an alternative embodiment, the hole transport layer may include nickel oxide (NiO x), polytriarylamine (PTAA), N,N'-bis(4-butylphenyl)-N,N'-bis(phenyl)-benzidine (Poly-TPD), self-assembled molecular layer (SAM), 2,2',7,7'-tetrakis[n,n-di(4-methoxyphenyl)amino]-9,9'-spirobifluorene (Spiro-OMeTAD). In some embodiments, the thickness of the hole transport layer can be 5 to 50 nm.
[0049] In an optional embodiment, the electron transport layer may include tin oxide (such as tin dioxide SnO2), titanium oxide (such as titanium dioxide TiO2), zinc oxide (ZnO), fullerene (C 60 ), fullerene derivatives (PCBM) or more. In some embodiments, the thickness of the electron transport layer can be 10-50 nm.
[0050] In an optional embodiment, if Figure 1 As shown, the trans-structured pin-type perovskite solar cell may further include a buffer layer 7, which is disposed between the electron transport layer and the metal electrode layer to regulate electron transport, optimize interface properties and improve stability, thereby further improving battery performance. The buffer layer 7 may include 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP), tin dioxide (SnO2), etc. In some embodiments, the thickness of the buffer layer 7 may be 1 to 15 nm.
[0051] In an optional embodiment, if Figure 2 As shown, the formal structure nip-type perovskite solar cell may also include a passivation layer 8, which is disposed between the hole transport layer and the perovskite layer 4, and can be used to adjust the interface properties, passivate lattice defects, and further optimize the cell photoelectric conversion performance. In some embodiments, the passivation layer may include phenethylamine iodide (PEAI).
[0052] The metal electrode layer 6 may be disposed on a side of the second transport layer 5 away from the perovskite layer 4 for collecting and transporting carriers. The metal electrode layer may include one or more of silver (Ag), copper (Cu), aluminum (Al), and gold (Au). In some embodiments, the thickness of the metal electrode layer 6 may be 50 to 150 nm.
[0053] The following will provide a number of specific embodiments to further illustrate the present application, but should not be construed as limiting the present application. Without departing from the spirit and substance of the present application, modifications or replacements made to the methods, steps or conditions of the present application are within the scope of the present application.
[0054] [Example 1] like Figure 1As shown, the specific structure of a perovskite solar cell (taking a trans-structure pin-type single junction as an example) can be: The substrate 1, the transparent conductive layer 2, the first transport layer 3 (which may be a hole transport layer), the perovskite layer 4, the second transport layer 5 (which may be an electron transport layer), the buffer layer 7, and the metal electrode layer 6 are stacked in sequence.
[0055] A specific preparation process of a perovskite solar cell can be: S100, forming transparent glass with a thickness of 3mm.
[0056] S101, using FTO as a raw material, a transparent conductive layer 2 is prepared by magnetron sputtering, and the thickness is 200 nm.
[0057] S102, using NiOx as a raw material, a first transmission layer 3 is prepared by magnetron sputtering, with a thickness of 20 nm.
[0058] S103, mixing the perovskite material and the organic solvent to form a perovskite precursor solution, adding 1% volume of fluoroamine to the perovskite precursor solution, and preparing a perovskite layer 4 with a thickness of 500 nm by slit coating.
[0059] S104, C 60 The second transmission layer 5 is prepared by thermal evaporation with a thickness of 25 nm.
[0060] S105, using BCP as a raw material, a buffer layer 7 is prepared by thermal evaporation, with a thickness of 5 nm.
[0061] S106, using Cu (copper) as a raw material, a metal electrode layer 6 is prepared by thermal evaporation, with a thickness of 90 nm.
[0062] [Example 2] The perovskite solar cell of Example 2 was prepared by referring to the preparation method of Example 1, except that S103 of Example 2 was as follows: the perovskite material and the organic solvent were mixed to form a perovskite precursor solution, 3% volume of fluoroamine was added to the perovskite precursor solution, and the perovskite layer 4 was prepared by slit coating with a thickness of 500 nm.
[0063] [Example 3] The perovskite solar cell of Example 3 was prepared by referring to the preparation method of Example 1, except that S103 of Example 3 was as follows: the perovskite material and the organic solvent were mixed to form a perovskite precursor solution, 5% volume of fluoroamine was added to the perovskite precursor solution, and the perovskite layer 4 was prepared by slit coating with a thickness of 500 nm.
[0064] [Comparative Example 1] The perovskite solar cell of Comparative Example 1 was prepared by referring to the preparation method of Example 1, except that S103 of Comparative Example 1 was as follows: the perovskite material and the organic solvent were mixed to form a perovskite precursor solution, and the perovskite layer 4 was prepared by slit coating with a thickness of 500 nm.
[0065] The following is a performance test of the perovskite solar cells provided in Examples 1-3 of the present application and Comparative Example 1, thereby obtaining the open circuit voltage V of the corresponding battery device. oc , short circuit current density J sc , fill factor FF, photoelectric conversion efficiency PCE, the test results are shown in Table 1.
[0066] Table 1 Performance test results of perovskite solar cells of Examples 1-3 and Comparative Example 1
[0067] It can be seen from Table 1 above that, compared with Comparative Example 1, the perovskite solar cells of Examples 1-3 of the present application have higher short-circuit current, fill factor and photoelectric conversion efficiency, that is, have better battery performance.
[0068] In summary, by using fluoroamine with high hydrophobicity and high polarity groups as a modifier and directly doping it into the perovskite mother solution (precursor solution), the bulk passivation and surface treatment of the perovskite can be achieved simultaneously. It is easy to operate and can effectively reduce production costs and improve battery efficiency.
[0069] The embodiment of the present application may also provide a photovoltaic module (not shown), including at least one battery string, the battery string including at least two perovskite solar cells as described above, and adjacent perovskite solar cells may be connected together by serial welding.
[0070] The embodiment of the present application can also provide a photovoltaic system, including the perovskite solar cell or photovoltaic module in any of the above embodiments. The advantages of the above perovskite solar cell or photovoltaic module are also possessed by the photovoltaic system, which will not be repeated here. The above photovoltaic system has a wide range of applications, not only limited to photovoltaic power stations, such as ground power stations, rooftop power stations and water power stations, but also includes various equipment and devices that use solar energy to generate electricity, such as user solar power supplies, solar street lights, solar cars and solar buildings. Of course, it can be understood that the application scenarios of the photovoltaic system are not limited to this, that is to say, the photovoltaic system can be used in all fields where solar energy is required for power generation. Taking the photovoltaic power generation system network as an example, the photovoltaic system may include a photovoltaic array, a junction box and an inverter. The photovoltaic array may be an array combination of multiple photovoltaic modules. For example, multiple photovoltaic modules can form multiple photovoltaic arrays. The photovoltaic array is connected to the junction box. The junction box can converge the current generated by the photovoltaic array. The converged current flows through the inverter and is converted into the alternating current required by the mains power grid and then connected to the mains network to realize solar power supply.
[0071] It should be noted that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. The orientation words "inside" and "outside" refer to the inside and outside relative to the outline of each component itself. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Therefore, the exemplary term "above..." can include both "above..." and "below..." orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used here are interpreted accordingly.
[0072] It should also be noted that "one embodiment", "another embodiment", "embodiment", etc. mentioned in this application refer to the specific features, structures or characteristics described in conjunction with the embodiment included in at least one embodiment generally described in this application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when a specific feature, structure or characteristic is described in conjunction with any embodiment, it is claimed that the realization of such feature, structure or characteristic in conjunction with other embodiments also falls within the scope of this application.
[0073] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.
[0074] It should also be noted that the above are only preferred embodiments of the present application, and the patent protection scope of the present application is not limited thereto. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.
Claims
1. A perovskite precursor solution, characterized in that: For preparing a perovskite layer of a perovskite solar cell, the perovskite precursor solution comprises a perovskite material, a modifier and an organic solvent; Wherein, the modifier includes organic amine.
2. The perovskite precursor solution according to claim 1, characterized in that The organic amine includes one or more of 1H,1H-undecylfluorohexylamine, 1H,1H-heptafluorobutylamine, 1H,1H-heptadecafluorononylamine, N-ethylmethylamine, and N,N-dimethylethylamine.
3. The perovskite precursor solution according to claim 1, characterized in that The general structural formula of the perovskite material is ABX3; Wherein, A is a monovalent cation, including one or more monovalent cations of cesium, rubidium, methylamine, and guanidine; B is a divalent cation, including one or more divalent cations of lead, copper, zinc, gallium, tin, and calcium; X is a monovalent anion, including one or more monovalent anions of iodine, bromine, chlorine, fluorine, and thiocyanate.
4. The perovskite precursor solution according to claim 1, characterized in that The organic solvent includes one or more of N,N-dimethylformamide, dimethyl sulfoxide, acetonitrile, N-methylpyrrolidone, 2-mercaptoethanol, γ-butyrolactone, and γ-valerolactone.
5. The perovskite precursor solution according to any one of claims 1 to 4, characterized in that: The volume of the modifier is 0.1%-10% of the volume of the perovskite precursor solution.
6. A perovskite solar cell, characterized in that: include: substrate; A transparent conductive layer is disposed on one side of the substrate; A first transmission layer, disposed on a side of the transparent conductive layer away from the substrate; a perovskite layer, disposed on a side of the first transmission layer away from the transparent conductive layer; A second transmission layer is provided on a side of the perovskite layer away from the first transmission layer; A metal electrode layer, disposed on a side of the second transmission layer away from the perovskite layer; Wherein, the raw materials of the perovskite layer include perovskite material, organic amine and organic solvent.
7. The perovskite solar cell according to claim 6, characterized in that: The organic amine includes one or more of 1H,1H-undecylfluorohexylamine, 1H,1H-heptafluorobutylamine, 1H,1H-heptadecafluorononylamine, N-ethylmethylamine, and N,N-dimethylethylamine.
8. The perovskite solar cell according to claim 6, characterized in that: The thickness of the perovskite layer is 10 to 10 5 nm, and the band gap is 0.9~3.0eV.
9. The perovskite solar cell according to claim 6, characterized in that: The substrate has a thickness of 1-5 mm, the transparent conductive layer has a thickness of 50-300 nm, and the metal electrode layer has a thickness of 50-150 nm.
10. A photovoltaic system, characterized in that: Comprising the perovskite solar cell according to any one of claims 6 to 9.