Laminated battery
By introducing dead zone electrode regions and dead zone blank regions within the photoactive layer of perovskite solar cells, the problems of current matching and size consistency in triple-junction perovskite tandem devices are solved, enabling efficient manufacturing and current utilization of tandem cells.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-26
- Publication Date
- 2026-03-03
AI Technical Summary
In the manufacturing process of existing triple-junction perovskite stacked devices, it is difficult to achieve current matching between different sub-cells while maintaining the size consistency of each sub-cell, which leads to manufacturing difficulties.
Dead zone electrode region and dead zone blank region are introduced into the photoactive layer of perovskite solar cell. Current matching is achieved by adjusting the area and two-dimensional size of the photoactive region. The two-dimensional size of the perovskite solar cell is adjusted according to the size of other sub-cells to ensure that the size of each sub-cell is consistent.
It achieves current matching between different sub-cells while maintaining the same size for each sub-cell, simplifying the manufacturing process of stacked devices, reducing optical losses, and improving current utilization efficiency.
Smart Images
Figure CN223968170U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of solar cell technology, and more particularly to a tandem solar cell. Background Technology
[0002] Traditional single-junction silicon-based solar cells have approached their theoretical energy conversion efficiency limit, while perovskite solar cells exhibit higher light absorption and greater carrier mobility. By connecting perovskite materials with different bandgap widths in series, the solar spectrum can be utilized more effectively, thereby improving the overall efficiency. Compared to other tandem device structures, triple-junction tandem devices have attracted much attention due to their higher theoretical efficiency limit.
[0003] Currently, triple-junction perovskite tandem devices can adopt a series structure. In this structure, the current is determined by the sub-cell with the smallest current, and the tandem voltage is the sum of the voltages of the three sub-cells. During the optimization of device performance, it is necessary to consider the current matching between different sub-cells to ensure that it does not affect the efficiency and stability of the tandem device.
[0004] To achieve current matching between different sub-cells, the area of the photoactive region of the sub-cell can be changed. However, in this process, the size of each sub-cell must be kept equal. When the perovskite photoactive layer is entirely composed of photoactive materials, changing the area of the sub-cell to achieve current matching will inevitably result in different sizes of each sub-cell, making the fabrication of stacked devices difficult.
[0005] 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. Utility Model Content
[0006] This application provides a stacked battery to solve or alleviate one or more of the technical problems mentioned above.
[0007] This application provides a stacked battery.
[0008] The stacked battery includes at least two sub-batteries, which are stacked together and electrically connected in series.
[0009] Among them, at least one sub-cell is a perovskite solar cell, and the perovskite solar cell includes a perovskite photoactive layer, which includes a photoactive region, a dead electrode region, and a dead blank region.
[0010] The photoactive region is in contact with at least a portion of the dead zone electrode region.
[0011] In this embodiment, the tandem solar cell includes a perovskite solar sub-cell. Dead-zone electrode regions and dead-zone blank regions are introduced within the perovskite photoactive layer of the perovskite solar sub-cell. Part of the dead-zone electrode region contacts the photoactive region to output charge carriers. By introducing dead-zone electrode regions and dead-zone blank regions, the actual area of the photoactive region can be adjusted, thereby adjusting the current of the perovskite solar sub-cell. While performing current matching, the two-dimensional dimensions of the perovskite solar sub-cell can also be adjusted according to the dimensions of other sub-cells to ensure that the dimensions of each sub-cell are consistent. Attached Figure Description
[0012] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.
[0013] Figure 1 This is a schematic diagram of the structure of the triple-junction stacked battery provided in the embodiments of this application;
[0014] Figure 2 This is a schematic diagram of the structure of the perovskite photoactive layer provided in the embodiments of this application, wherein, Figure 2 (a) ~ Figure 2 (h) represents 8 different implementation methods.
[0015] Explanation of reference numerals in the attached figures:
[0016] 101-First contact electrode; 102-First carrier transport layer; 103-First perovskite photoactive layer; 104-Second carrier transport layer; 105-Second contact electrode; 201-Third contact electrode; 202-Third carrier transport layer; 203-Third photoactive layer; 204-Fourth carrier transport layer; 205-Fourth contact electrode; 301-Fifth contact electrode; 302-Fifth carrier transport layer; 303-Third photoactive layer; 304-Sixth carrier transport layer; 305-Sixth contact electrode; 1031-Photoactive region; 1032-Dead zone electrode region; 1033-Dead zone blank region; 4-Adhesive layer; 5-Conductive connecting line; 6-First dead zone; 7-Second dead zone. Detailed Implementation
[0017] The embodiments of this application are described in detail below, examples of which are illustrated in the accompanying drawings. In the drawings, for clarity, the dimensions of layers, regions, and elements, as well as their relative dimensions, may be exaggerated. Throughout, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.
[0018] 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 may be directly on, adjacent to, connected to, or coupled to other elements or layers, or there may be intervening elements or layers. Conversely, when an element is referred to as "directly on," "directly adjacent to," "directly connected to," or "directly coupled to" other elements or layers, there are no intervening elements or layers. It should be understood that although the terms first, second, third, etc., may be used to describe various elements, components, areas, layers, and / or portions, these elements, components, areas, layers, and / or portions should not be limited by these terms. These terms are only used to distinguish one element, component, area, layer, or portion from another element, component, area, layer, or portion. Therefore, without departing from the teachings of this application, the first element, component, area, layer, or portion discussed below may be referred to as a second element, component, area, layer, or portion. And the discussion of a second element, component, area, layer, or portion does not imply that the first element, component, area, layer, or portion necessarily exists in this application.
[0019] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0020] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.
[0021] In this application, when numerical intervals (i.e., numerical ranges) are involved, unless otherwise specified, the distribution of selectable numerical values within the numerical interval is considered continuous, and includes the two endpoints of the numerical interval (i.e., the minimum and maximum values), as well as every numerical value between these two endpoints. Unless otherwise specified, when a numerical interval refers only to integers within that numerical interval, it includes the two endpoint integers of the numerical range, as well as every integer between the two endpoints, which is equivalent to directly listing every integer. When multiple numerical ranges are provided to describe features or characteristics, these numerical ranges can be merged. In other words, unless otherwise specified, the numerical ranges disclosed in this application should be understood to include any and all subranges included therein. The "numerical value" in the numerical interval can be any quantitative value, such as a number, percentage, ratio, etc. The term "numerical interval" can be broadly included to include percentage intervals, ratio intervals, proportion intervals, etc.
[0022] This application provides a technical solution for a stacked battery. Based on this, both current matching and size matching between the individual sub-cells can be achieved. See below for details.
[0023] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. It should be understood that these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein.
[0024] This application provides a stacked battery.
[0025] The stacked battery includes at least two sub-batteries, which are stacked together and electrically connected in series.
[0026] Wherein, at least one of the sub-cells is a perovskite solar cell, the perovskite solar cell includes a perovskite photoactive layer, the perovskite photoactive layer includes a photoactive region, a dead electrode region and a dead blank region;
[0027] The photoactive region is in contact with at least a portion of the dead zone electrode region.
[0028] In this embodiment, the tandem solar cell includes a perovskite solar sub-cell. Dead-zone electrode regions and dead-zone blank regions are introduced within the perovskite photoactive layer of the perovskite solar sub-cell. Part of the dead-zone electrode region contacts the photoactive region to output charge carriers. By introducing dead-zone electrode regions and dead-zone blank regions, the actual photoactive region area can be adjusted, thereby adjusting the current of the perovskite solar sub-cell. Simultaneously, while achieving current matching, the two-dimensional dimensions of the perovskite solar sub-cell can be adjusted according to the dimensions of other sub-cells to ensure consistency in size among all sub-cells. The two-dimensional dimensions refer to the length and width of the perovskite solar sub-cell.
[0029] It is worth noting that the dead electrode region and the dead blank region constitute the dead region, which is the region without photoactive material. The dead electrode region can retain electrode material for carrier transport and facilitate electrical connection between sub-cells. The presence of the dead blank region can reduce optical losses caused by parasitic absorption of the contact electrode and carrier transport layer, thereby reducing current losses in the photoactive region with a medium bandgap (1.30 eV to 1.75 eV) or a narrow bandgap (0.5 eV to 1.3 eV).
[0030] Optionally, the dead electrode region can be prepared by using a carrier transport layer and a perovskite photoactive layer prepared on the contact electrode as a substrate, and etching with a laser or ion beam to etch away specific photoactive regions and the carrier transport layer located on the photoactive regions, while retaining the corresponding conductive material on the contact electrode. The resulting etched area is the dead electrode region.
[0031] Optionally, the dead zone blank area is formed by etching a carrier transport layer and a perovskite photoactive layer fabricated on the contact electrode as a substrate using a laser or ion beam to remove a specific photoactive region, the carrier transport layer located on the photoactive region, and the corresponding contact electrode. The resulting etched area is the dead zone blank area.
[0032] In some embodiments, an adhesive layer is provided between the sub-cells in this stacked battery. This achieves a fixed connection between the sub-cells.
[0033] Optionally, the adhesive layer includes at least one of epoxy resin, polyurethane, silicone sealant, hot melt adhesive, butyl sealant, acrylic sealant, etc.
[0034] In some embodiments, in this stacked battery, each sub-cell includes a contact electrode, and the contact electrodes of adjacent sub-cells are connected by conductive connecting lines; wherein the polarities of the connected contact electrodes are opposite. Thus, the sub-cells are connected in series via conductive connecting lines.
[0035] Optionally, the contact electrode may include conductive metal and / or conductive metal oxide, and may also include a glass substrate, polymer substrate, etc.
[0036] Optionally, the conductive connecting wire includes at least one of copper wire, aluminum wire, silver wire, molybdenum wire, silver-plated wire, tin-copper wire, etc.
[0037] In some embodiments of this tandem solar cell, the dead electrode region constitutes the periphery of the perovskite photoactive layer, i.e., a structure with the periphery being a dead electrode region is adopted. Thus, the periphery of the perovskite photoactive layer is entirely conductive, facilitating the connection of conductive wires between sub-cells, and allowing for the control of the photoactive region area through the electrode-free region. For the design with the periphery being a dead electrode region, the position and shape of the dead electrode region within the perovskite photoactive layer can be arbitrary, as long as a portion of the dead electrode region is in direct contact with the photoactive region.
[0038] Optionally, when the cross-section of the perovskite photoactive layer is rectangular and the dead zone electrode region constitutes the periphery of the perovskite photoactive layer, the photoactive region and the dead zone blank region are located within the space enclosed by the dead zone electrode region; the dead zone blank region includes at least one and is arranged in a strip shape, both sides of the dead zone blank region are photoactive regions, and both ends of the dead zone blank region are in contact with the dead zone electrode region.
[0039] Optionally, when the cross-section of the perovskite photoactive layer is rectangular and the dead zone electrode region constitutes the periphery of the perovskite photoactive layer, the photoactive region and the dead zone blank region are located within the space enclosed by the dead zone electrode region; the dead zone blank region includes at least one and is arranged in a strip shape, and the dead zone blank region is located between the photoactive region and the dead zone electrode region.
[0040] In some specific embodiments, taking the first perovskite photoactive layer 103 as an example, see [link to relevant documentation]. Figure 2 (a) ~ Figure 2 (d) All the above implementation methods adopt a structural design with the outer periphery being a dead zone electrode region. Specifically, Figure 2 (a) uses a strip-shaped dead zone blank region 1033, with photoactive regions 1031 on both sides of the dead zone blank region 1033, and the two ends of the dead zone blank region 1033 are in contact with the dead zone electrode region 1032. Figure 2 (b) Two strip-shaped dead zone blank regions 1033 are used, and the two strip-shaped dead zone blank regions 1033 are respectively located between two oppositely arranged photoactive regions 1031 and dead zone electrode regions 1032; Figure 2 (c) Three strip-shaped dead zone blank regions 1033 are used, and the three strip-shaped dead zone blank regions 1033 are located between the three photoactive regions 1031 and the dead zone electrode region 1032, respectively. Figure 2 In (d), each of the four photoactive regions 1031 and the dead electrode region 1032 has a strip-shaped dead blank region 1033 at the interface. In one of the dead blank regions 1033, a dead electrode region 1032 is provided to connect the photoactive region 1031 and the surrounding dead electrode region 1032.
[0041] Preferably, the conductive area of the dead zone electrode region 1032 can be made of a transparent conductive material, thereby allowing the dead zone electrode region 1032 to transmit light and improving the absorption and utilization of light.
[0042] Preferably, the dead electrode region 1032 and the dead electrode region 1032 can be adopted Figure 2 (d) Structure to prevent substances in the binder layer from entering the photoactive region and affecting the photoactive material during the preparation process.
[0043] In other embodiments, in this tandem solar cell, the dead-zone blank area in the perovskite photoactive layer constitutes the periphery of the perovskite photoactive layer, i.e., it adopts a structural design with electrode-free areas on all four sides. Thus, the presence of dead-zone blank areas on all four sides can reduce parasitic absorption caused by the presence of electrode material. For the design with electrode-free areas on all four sides, the position and shape of the dead-zone electrode area in the perovskite photoactive layer can be arbitrary.
[0044] Preferably, the adhesive layer can be made of a transparent adhesive material. This reduces optical loss.
[0045] Optionally, when the cross-section of the perovskite photoactive layer is rectangular and the dead zone blank area constitutes the periphery of the perovskite photoactive layer, the photoactive area and the dead zone electrode area are located within the space enclosed by the dead zone blank area; the dead zone electrode area includes at least one and is arranged in a strip shape, with the photoactive area on both sides of the dead zone electrode area, and the two ends of the dead zone electrode area contacting the dead zone blank area.
[0046] Optionally, when the cross-section of the perovskite photoactive layer is rectangular and the dead zone / blank area constitutes the periphery of the perovskite photoactive layer, the photoactive area and the dead zone electrode area are located within the space enclosed by the dead zone / blank area; the dead zone electrode area includes at least one and is arranged in a strip shape, and the dead zone electrode area is located between the photoactive area and the dead zone / blank area.
[0047] Furthermore, when the cross-section of the perovskite photoactive layer is rectangular and the dead zone electrode region constitutes the periphery of the perovskite photoactive layer, the photoactive region and the dead zone blank region are located within the space enclosed by the dead zone electrode region; the dead zone blank region includes at least one and is arranged in a strip shape, and the dead zone blank region is located between the photoactive region and the dead zone electrode region.
[0048] In some specific implementations, see Figure 2 (e) ~ Figure 2 (h) All the above implementation methods adopt a structural design with the periphery as a dead zone / blank zone 1033. Specifically, Figure 2 (e) uses a strip-shaped dead zone electrode region 1032, with photoactive regions 1031 on both sides of the dead zone electrode region 1032, and the two ends of the dead zone electrode region 1032 are in contact with the dead zone blank region 1033. Figure 2 (f) Two strip-shaped dead zone electrode regions 1032 are used, which are located between two oppositely arranged photoactive regions 1031 and dead zone blank regions 1033. Figure 2 (g) Three strip-shaped dead zone electrode regions 1032 are used, and the three strip-shaped dead zone electrode regions 1032 are located between the three photoactive regions 1031 and the dead zone blank region 1033, respectively. Figure 2 In (h), strip-shaped dead zone electrode regions 1032 are provided at the interfaces between the four photoactive regions 1031 and the dead zone blank regions 1033.
[0049] In some embodiments, see Figure 1 The tandem solar cell includes a triple-junction tandem solar cell, comprising a first perovskite sub-cell, a second perovskite sub-cell, and a third sub-cell, with an adhesive layer 4 between each of the three sub-cells. The first perovskite sub-cell comprises a first contact electrode 101, a first carrier transport layer 102, a first perovskite photoactive layer 103, a second carrier transport layer 104, and a second contact electrode 105, stacked sequentially. The second perovskite sub-cell comprises a third contact electrode 201, a third carrier transport layer 204, and a second contact electrode 105, stacked sequentially. The first sub-cell comprises a first perovskite photoactive layer 202, a second perovskite photoactive layer 203, a fourth carrier transport layer 204, and a fourth contact electrode 205. The third sub-cell comprises a fifth contact electrode 301, a fifth carrier transport layer 302, a third photoactive layer 303, a sixth carrier transport layer 304, and a sixth contact electrode 305 stacked sequentially. The bandgap of the first perovskite photoactive layer 103 is greater than that of the second perovskite photoactive layer 203, and the bandgap of the second perovskite photoactive layer 203 is greater than that of the third photoactive layer 303. Conductive connection lines 5 are independently connected between the second contact electrode 105 and the third contact electrode 201, and between the fourth contact electrode 205 and the fifth contact electrode 301. The first perovskite sub-cell has a first dead region 6, and the third sub-cell has a second dead region 7.
[0050] Therefore, in this embodiment, the sub-cells of the triple-junction tandem solar cell are connected in series with the bonding layer by connecting conductive wires, which can avoid damage to the bottom cell during the perovskite deposition process. At the same time, the current matching between the sub-cells can be achieved by reducing the photoactive region in the first perovskite photoactive layer 103 and the third photoactive layer 303, which can broaden the range of photoactive materials to be selected in the preparation of the triple-junction perovskite tandem solar cell.
[0051] Furthermore, in order to achieve current matching between sub-cells, the two-dimensional dimensions of the first perovskite sub-cell, the second perovskite sub-cell, and the third sub-cell are all equal, that is, the length and width of the sub-cells are equal.
[0052] Furthermore, A1×J1=A2×J2=A3×J3;
[0053] Wherein, A1 is the area of the photoactive region of the first perovskite sub-cell; J1 is the current density of the first perovskite sub-cell; A2 is the area of the photoactive region of the second perovskite sub-cell; J2 is the current density of the second perovskite sub-cell; A3 is the area of the photoactive region of the third sub-cell; and J3 is the current density of the third sub-cell. Thus, while matching the current of each sub-cell, the two-dimensional dimensions of each sub-cell can remain consistent by adjusting the size of the dead zone.
[0054] Preferably, the bandgap of the first perovskite sub-cell is 1.75 eV to 3.10 eV; the bandgap of the second perovskite sub-cell is 1.30 eV to 1.75 eV; and the bandgap of the third sub-cell is 0.5 eV to 1.3 eV. This allows for efficient spectral segmentation and utilization.
[0055] Optionally, the first perovskite sub-cell and the second perovskite sub-cell each independently include a perovskite photoactive layer.
[0056] Optionally, the third sub-cell includes at least one of perovskite photoactive material, crystalline silicon, group III-V compound, and group II-VI compound.
[0057] Furthermore, the III-V main group compounds may include at least one of gallium arsenide (GaAs), indium phosphide (InP), gallium nitride (GaN), and aluminum gallium arsenide (AlGaAs);
[0058] Furthermore, the group II-VI compounds may include at least one of cadmium telluride (CdTe), cadmium sulfide (CdS), zinc selenide (ZnSe), and zinc sulfide (ZnS).
[0059] It should be noted that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. The directional terms "inner" and "outer" refer to the inside or outside relative to the outline of the component itself. For example, if a device in the drawings is inverted, a device described as "above" or "on top of" other devices or structures will subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.
[0060] It should also be noted that the terms "one embodiment," "another embodiment," and "embodiment" used in this application refer to specific features, structures, or characteristics described in connection with that embodiment, which are included in at least one embodiment described in the general description of this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in connection with any embodiment, the intention is to suggest that implementing such a feature, structure, or characteristic in conjunction with other embodiments also falls within the scope of this application.
[0061] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.
[0062] It should also be noted that the above are merely preferred embodiments of this application and do not limit the scope of patent protection of this application. Any equivalent structural or procedural changes made using the content of this application’s specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of this application.
Claims
1. A stacked battery, characterized by comprising: The application relates to a stacked cell, which comprises at least two sub-cells, the sub-cells are arranged in a stack, and the sub-cells are electrically connected in series. At least one of the sub-cells is a perovskite solar sub-cell, the perovskite solar sub-cell comprises a perovskite photoactive layer, the perovskite photoactive layer comprises a photoactive region, a dead zone electrode region and a dead zone blank region. The photoactive region is in contact with at least part of the dead zone electrode region. The sub-cells are provided with a bonding layer.
2. The stacked battery of claim 1, wherein, The sub-cells each comprise a contact electrode, the contact electrodes of adjacent sub-cells are connected through a conductive connecting line.
3. The stacked battery of claim 1, wherein, The polarities of the connected contact electrodes are opposite. In the perovskite photoactive layer, the dead zone electrode region constitutes the periphery of the perovskite photoactive layer, or the dead zone blank region constitutes the periphery of the perovskite photoactive layer.
4. The stacked battery of claim 1, wherein, When the cross section of the perovskite photoactive layer is rectangular and the dead zone electrode region constitutes the periphery of the perovskite photoactive layer, the photoactive region and the dead zone blank region are located in the space surrounded by the dead zone electrode region.
5. The stacked battery of claim 4, wherein The dead zone blank region comprises at least one, the two sides of the dead zone blank region are the photoactive regions, and the two ends of the dead zone blank region are in contact with the dead zone electrode regions; or The dead zone blank region comprises at least one, and the dead zone blank region is located between the photoactive region and the dead zone electrode region. When the cross section of the perovskite photoactive layer is rectangular and the dead zone blank region constitutes the periphery of the perovskite photoactive layer, the photoactive region and the dead zone electrode region are located in the space surrounded by the dead zone blank region.
6. The stacked battery of claim 4, wherein The dead zone electrode region comprises at least one, the two sides of the dead zone electrode region are the photoactive regions, and the two ends of the dead zone electrode region are in contact with the dead zone blank regions; or The dead zone electrode region comprises at least one, and the dead zone electrode region is located between the photoactive region and the dead zone blank region. The stacked cell comprises a three-junction stacked cell, the three-junction stacked cell comprises a first perovskite sub-cell, a second perovskite sub-cell and a third sub-cell.
7. The stacked cell according to any one of claims 1 to 6, characterized by The first perovskite sub-cell comprises a first contact electrode (101), a first carrier transport layer (102), a first perovskite photoactive layer (103), a second carrier transport layer (104) and a second contact electrode (105) which are sequentially stacked. The second perovskite sub-cell comprises a third contact electrode (201), a third carrier transport layer (202), a second perovskite photoactive layer (203), a fourth carrier transport layer (204) and a fourth contact electrode (205) which are sequentially stacked. The third sub-cell comprises a fifth contact electrode (301), a fifth carrier transport layer (302), a third photoactive layer (303), a sixth carrier transport layer (304) and a sixth contact electrode (305) which are sequentially stacked. The band gap of the first perovskite photoactive layer (103) is greater than the band gap of the second perovskite photoactive layer (203), and the band gap of the second perovskite photoactive layer (203) is greater than the band gap of the third photoactive layer (303). 8. The stacked battery of claim 7, wherein, The first perovskite sub-cell, the second perovskite sub-cell and the third sub-cell are equal in two-dimensional size; And, A1xJ1=A2xJ2=A3xJ3; Wherein, A1 is the area of the light active region of the first perovskite sub-cell; J1 is the current density of the first perovskite sub-cell; A2 is the area of the light active region of the second perovskite sub-cell; J2 is the current density of the second perovskite sub-cell; A3 is the area of the light active region of the third sub-cell; J3 is the current density of the third sub-cell.
9. The stacked battery of claim 8, wherein, The band gap of the first perovskite sub-cell is 1.75eV-3.10eV; The band gap of the second perovskite sub-cell is 1.30eV-1.75eV; The band gap of the third sub-cell is 0.5eV-1.3eV.
10. The stacked battery of claim 9, wherein, The first perovskite sub-cell and the second perovskite sub-cell each independently comprises the perovskite light active layer; and / or The third sub-cell is one of perovskite light active substance, crystalline silicon, pnictogens, and chalcogens.