Perovskite solar cell module

Abstract

The invention discloses a perovskite solar cell module. The cell module comprises a substrate; a first common conductive region disposed on the first surface of the substrate; a second common conductive region disposed on the first surface of the substrate; the second common conductive region and the first common conductive region are arranged on the first surface in a spaced and insulated manner; the functional coating area is arranged on the first surface of the substrate, and the vertical projection of the functional coating area on the substrate is not overlapped with the vertical projection of the first common conductive area on the substrate and the vertical projection of the second common conductive area on the substrate; the functional coating area comprises a plurality of sub battery packs; the plurality of first extraction electrodes and the plurality of second extraction electrodes are arranged on the first surface of the substrate, and the first extraction electrodes are used for realizing electric connection between the bottom electrodes of the sub battery packs and the first common conductive region; and the second extraction electrode is used for realizing electric connection between the top electrode of the sub-battery pack and the second common conductive region. According to the invention, the voltage and current of the perovskite solar cell module are controllable.

Description

Technical Field

[0001] The invention relates to the field of energy technology, and in particular to a perovskite solar cell assembly. Background Art

[0002] As a new generation of photovoltaic cells, perovskite solar cells have increasingly improved efficiency and stability and are candidates for future mainstream photovoltaic products.

[0003] At present, perovskite solar cell modules adopt a full series connection mode, which shows the characteristics of high voltage and low current. However, photovoltaic products generally have certain numerical requirements for voltage and current in actual application, and perovskite solar cells also need to meet certain voltage and current matching when forming a complete stacked module with crystalline silicon. The full series connection mode of perovskite solar cell modules currently makes its design voltage and current uncontrollable and cannot meet the needs of actual applications. Summary of the invention

[0004] The present invention provides a perovskite solar cell module to solve the problem that the design voltage and current of the current perovskite solar cell module are uncontrollable and cannot meet the actual application requirements.

[0005] In a first aspect, the present invention provides a perovskite solar cell module, the perovskite solar cell module comprising:

[0006] substrate;

[0007] A first common conductive region is disposed on a first surface of the substrate;

[0008] A second common conductive region is disposed on the first surface of the substrate; the second common conductive region and the first common conductive region are spaced and insulated from each other on the first surface;

[0009] A functional coating area is arranged on the first surface of the substrate, and a vertical projection of the functional coating area on the substrate does not overlap with a vertical projection of the first common conductive area on the substrate and a vertical projection of the second common conductive area on the substrate; the functional coating area includes a plurality of sub-battery groups;

[0010] A plurality of first lead electrodes and a plurality of second lead electrodes are arranged on the first surface of the substrate, the first lead electrodes are used to realize the electrical connection between the bottom electrode of the sub-battery group and the first common conductive area; the second lead electrodes are used to realize the electrical connection between the top electrode of the sub-battery group and the second common conductive area.

[0011] Optionally, the perovskite solar cell module further comprises: an insulating region;

[0012] The insulating area is arranged on the first surface of the substrate and is used for isolating the first common conductive area, the second common conductive area and the functional coating area.

[0013] Optionally, the sub-battery pack includes a plurality of sub-batteries;

[0014] The top electrode of a sub-cell in each sub-cell group is connected to the bottom electrode of an adjacent sub-cell to form a series connection structure.

[0015] Optionally, the sub-cell includes a bottom conductive layer, a light absorbing and transmitting layer, and a top conductive layer which are stacked; the top conductive layer serves as a top electrode of the sub-cell, and the bottom conductive layer serves as a bottom electrode of the sub-cell;

[0016] The top conductive layer of a sub-cell within each sub-cell group is connected to the bottom conductive layer of an adjacent sub-cell.

[0017] Optionally, the width of the insulating area ranges from 0.5 mm to 2 mm.

[0018] Optionally, the width of the first lead-out electrode ranges from 0.5 mm to 2 mm, and the width of the second lead-out electrode ranges from 0.5 mm to 2 mm.

[0019] Optionally, the perovskite solar cell assembly further comprises: a positive electrode lead and a negative electrode lead;

[0020] The positive electrode lead is arranged on the first common conductive area and is electrically connected to the first common conductive area; the negative electrode lead is arranged on the second common conductive area and is electrically connected to the second common conductive area.

[0021] Optionally, the positive electrode lead includes a conductive tape or a photovoltaic welding tape; the negative electrode lead includes a conductive tape or a photovoltaic welding tape.

[0022] Optionally, the first common conductive region includes a bottom conductive layer, and the second common conductive region includes a bottom conductive layer; the first extraction electrode includes a bottom conductive layer, and the second extraction electrode includes a bottom conductive layer.

[0023] Optionally, the bottom conductive layer includes an indium tin oxide conductive layer, a fluorine-doped tin oxide conductive layer, or an aluminum-doped zinc oxide conductive layer.

[0024] The technical solution of the embodiment of the present invention is to set a first common conductive area and a second common conductive area, and the bottom electrodes of the multiple sub-battery groups in the functional coating area can be connected to the first common conductive area by means of the first lead-out electrode, and the top electrodes of the multiple sub-battery groups can be connected to the second common conductive area by means of the second lead-out electrode, so as to realize the parallel connection of the multiple sub-battery groups. The number of sub-battery groups in the functional coating area can be arbitrarily set according to actual needs, and the number of sub-battery groups determines the current value of the perovskite solar cell module, so that the current of the perovskite solar cell module is controllable, meeting the actual application needs, and making it easy for the perovskite solar cell module to form a stacked component with customizable current with the crystalline silicon module.

[0025] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 is a top view of a perovskite solar cell assembly provided by an embodiment of the present invention;

[0028] Figure 2 It is a schematic diagram of the cross-sectional structure of a perovskite solar cell module provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0030] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention 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 data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof 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.

[0031] Figure 1 is a top view of a perovskite solar cell assembly provided by an embodiment of the present invention, Figure 2 is a schematic cross-sectional structure diagram of a perovskite solar cell module provided by an embodiment of the present invention, Figure 2 yes Figure 1The schematic diagram of the cross-sectional structure after cutting along the dotted line AB is as follows: Figure 1 and Figure 2 As shown, the perovskite solar cell assembly includes: a substrate 1, a first common conductive area 2, which is arranged on the first surface 101 of the substrate 1. A second common conductive area 3 is arranged on the first surface 101 of the substrate 1; the second common conductive area 3 and the first common conductive area 2 are arranged insulated and spaced apart on the first surface 101. A functional coating area 4 is arranged on the first surface 101 of the substrate 1, and the vertical projection of the functional coating area 4 on the substrate 1 does not overlap with the vertical projection of the first common conductive area 2 on the substrate 1 and the vertical projection of the second common conductive area 3 on the substrate 1. The functional coating area 4 includes a plurality of sub-battery groups 40. A plurality of first extraction electrodes 5 and a plurality of second extraction electrodes 6 are arranged on the first surface 101 of the substrate 1, and the first extraction electrode 5 is used to realize the electrical connection between the bottom electrode of the sub-battery group 40 and the first common conductive area 2. The second extraction electrode 6 is used to realize the electrical connection between the top electrode of the sub-battery group 40 and the second common conductive area 3.

[0032] Specifically, the substrate 1 may be a glass substrate, the first common conductive region 2 and the second common conductive region 3 are spaced and insulated on the first surface 101 of the substrate 1, and the first common conductive region 2 and the second common conductive region 3 may both include an indium tin oxide conductive layer, a fluorine-doped tin oxide conductive layer, or an aluminum-doped zinc oxide conductive layer. The functional coating region 4 may include a bottom conductive layer 41, a light absorption transmission layer 42, and a top conductive layer 43 stacked on the first surface 101 of the substrate 1, and the functional coating region 4 may include a plurality of sub-battery groups 40, Figure 1 and Figure 2 It is exemplarily shown that the functional coating area 4 includes four sub-battery groups 40. In some embodiments of the present invention, the number of sub-battery groups 40 in the functional coating area 4 may be greater than four or less than four, which is not specifically limited herein.

[0033] The bottom conductive layer 41 in the functional coating area 4 is provided with a plurality of first grooves 45, and the first grooves 45 isolate the bottom conductive layer 41 into a plurality of bottom electrodes. The light absorption transmission layer 42 in the functional coating area 4 is provided with a plurality of second grooves 46, and the second grooves 46 isolate the light absorption transmission layer 42 into a plurality of light absorption transmission parts. The top conductive layer 43 in the functional coating area 4 is provided with a plurality of third grooves 47, and the third grooves 47 isolate the top conductive layer 43 into a plurality of top electrodes. The vertical projections of the first groove 45, the second groove 46 and the third groove 47 on the substrate 1 do not overlap, and the light absorption transmission layer 42 can be filled in the first groove 45, and the top conductive layer 43 can also be filled in the second groove 46. The top electrode isolated by the third groove 47 at the edge of one side of each sub-battery group 40 serves as the top electrode of the sub-battery group 40, and the bottom electrode isolated by the first groove 45 at the edge of the other side of each sub-battery group 40 serves as the bottom electrode of the sub-battery group 40. The top electrode of each sub-battery group 40 in the functional coating area 4 is connected to the second extraction electrode 6, and is connected to the second common conductive area 3 through the second extraction electrode 6. The bottom electrode of each sub-battery group 40 in the functional coating area 4 is connected to the first extraction electrode 5, and is connected to the first common conductive area 2 through the first extraction electrode 5. The bottom electrode of the sub-battery group 40 at the edge of the functional coating area 4 can be directly connected to the first common conductive area 2, or integrally formed. In this way, multiple sub-battery groups 40 in the functional coating area 4 are connected in parallel.

[0034] The technical solution of the embodiment of the present invention is to set a first common conductive area and a second common conductive area, and the bottom electrodes of the multiple sub-battery groups in the functional coating area can be connected to the first common conductive area by means of the first lead-out electrode, and the top electrodes of the multiple sub-battery groups can be connected to the second common conductive area by means of the second lead-out electrode, so as to realize the parallel connection of the multiple sub-battery groups. The number of sub-battery groups in the functional coating area can be arbitrarily set according to actual needs, and the number of sub-battery groups determines the current value of the perovskite solar cell module, so that the current of the perovskite solar cell module is controllable, meeting the actual application needs, and making it easy for the perovskite solar cell module to form a stacked component with customizable current with the crystalline silicon module.

[0035] Optionally, based on the above embodiments, continue to refer to Figure 1 and Figure 2 The perovskite solar cell assembly further includes an insulating region 7 . The insulating region 7 is disposed on the first surface 101 of the substrate 1 and is used to isolate the first common conductive region 2 , the second common conductive region 3 and the functional coating region 4 .

[0036] Specifically, an insulating area 7 is also provided on the first surface 101 of the substrate 1, and the insulating area 7 can realize insulating isolation between the first common conductive area 2 and the second common conductive area 3, and can also realize insulating isolation between the first common conductive area 2 and the functional coating area 4, and can also realize insulating isolation between the second common conductive area 3 and the functional coating area 4.

[0037] Optionally, based on the above embodiments, continue to refer to Figure 1 and Figure 2 The sub-battery group 40 includes a plurality of sub-batteries 44. The top electrode of each sub-battery 44 in the sub-battery group 40 is connected to the bottom electrode of the adjacent sub-battery 44 to form a series connection structure.

[0038] Specifically, each sub-battery group 40 may include a plurality of sub-batteries 44. Figure 2 exemplarily shows that each sub-battery group 40 includes four sub-batteries 44. In some embodiments of the present invention, the number of sub-batteries 44 in each sub-battery group 40 may be greater than four or less than four, which is not specifically limited herein. Each sub-battery group 40 includes a bottom conductive layer 41, a light absorption transmission layer 42, and a top conductive layer 43 stacked on the first surface 101 of the substrate 1. The first groove 45 divides the bottom conductive layer 41 into a plurality of bottom electrodes, which may be the bottom electrode of the sub-battery 44. The second groove 46 divides the light absorption transmission layer 42 into a plurality of light absorption transmission parts, and each sub-battery 44 includes a light absorption transmission part, which may be filled in the first groove 45. The third groove 47 divides the top conductive layer into a plurality of top electrodes, which may be the top electrode of the sub-battery 44. The top electrode may be filled in the second groove 46, so that the top electrode of the sub-battery 44 in each sub-battery group 40 may be connected to the bottom electrode of the adjacent sub-battery 44, thereby realizing that each sub-battery group 40 includes a plurality of sub-batteries 44 connected in series. The top electrode of the sub-cell 44 at the edge of one side of each sub-cell group 40 can be used as the top electrode of the sub-cell group 40, and the bottom electrode of the sub-cell 44 at the edge of the other side of each sub-cell group 40 can be used as the bottom electrode of the sub-cell group 40. According to the technical solution of the embodiment of the present invention, the multiple sub-cell groups 40 of the functional coating area 4 are connected in parallel, and each sub-cell group 40 may include multiple sub-cells 44 connected in series. The number of sub-cell groups 40 in the functional coating area 4 can be arbitrarily set according to actual needs, and the number of sub-cells 44 in each sub-cell group 40 can be arbitrarily set according to actual needs. The number of sub-cells 40 determines the current value of the perovskite solar cell module, and the number of sub-cells 44 in each sub-cell group 40 determines the voltage value of the perovskite solar cell module, so that the voltage and current of the perovskite solar cell module are controllable to meet the actual application needs, and at the same time, the perovskite solar cell module is easy to form a stacked component with customizable voltage and current with the crystalline silicon module.

[0039] Optionally, based on the above embodiments, continue to refer to Figure 1 and Figure 2 The subcell 44 includes a bottom conductive layer 41, a light absorbing and transmitting layer 42, and a top conductive layer 43 which are stacked. The top conductive layer 43 serves as the top electrode of the subcell 44, and the bottom conductive layer 41 serves as the bottom electrode of the subcell 44. The top conductive layer 43 of the subcell 44 in each subcell group 40 is connected to the bottom conductive layer 41 of the adjacent subcell 44.

[0040] Specifically, each sub-battery group 40 includes a bottom conductive layer 41, a light absorption transmission layer 42, and a top conductive layer 43 stacked on the first surface 101 of the substrate 1, the first groove 45 divides the bottom conductive layer 41 into a plurality of bottom electrodes, which can be the bottom electrodes of the sub-battery 44, the second groove 46 divides the light absorption transmission layer 42 into a plurality of light absorption transmission parts, each sub-battery 44 includes a light absorption transmission part, and the light absorption transmission part can be filled in the first groove 45, and the third groove 47 divides the top conductive layer into a plurality of top electrodes, which can be the top electrode of the sub-battery 44. The top electrode can be filled in the second groove 46, so that the top electrode of the sub-battery 44 in each sub-battery group 40 can be connected to the bottom electrode of the adjacent sub-battery 44, so that each sub-battery group 40 includes a plurality of sub-batteries 44 connected in series.

[0041] Optionally, based on the above embodiments, continue to refer to Figure 1 and Figure 2 , the width h1 of the insulating area 7 is in the range of 0.5 mm to 2 mm.

[0042] Specifically, the width h1 of the insulating region 7 can be set to a range of 0.5 mm-2 mm. If the width h1 of the insulating region 7 is set too wide, the volume of the perovskite solar cell module will be too large, and the efficiency of the perovskite solar cell will be significantly reduced as the cell area increases. If the width h1 of the insulating region 7 is set too narrow, the insulation effect between the first common conductive region 2, the second common conductive region 3 and the functional coating region 4 will be poor, affecting the overall performance and stability of the perovskite solar cell module.

[0043] Optionally, based on the above embodiments, continue to refer to Figure 1 and Figure 2 The width h2 of the first lead-out electrode 5 is in the range of 0.5 mm to 2 mm, and the width h3 of the second lead-out electrode 6 is in the range of 0.5 mm to 2 mm.

[0044] Specifically, the width h2 of the first lead-out electrode 5 can be set to a range of 0.5 mm-2 mm, and the width h3 of the second lead-out electrode 6 can be set to a range of 0.5 mm-2 mm. The bottom electrodes of the multiple sub-battery groups 40 of the functional coating area 4 are connected to the first common conductive area 2 by means of the first lead-out electrode 5, and the top electrodes of the multiple sub-battery groups 40 are connected to the second common conductive area 3 by means of the second lead-out electrode 6, thereby realizing the parallel connection of the multiple sub-battery groups 40 of the functional coating area 4. If the width of the first lead-out electrode 5 and the second lead-out electrode 6 is set too wide, the volume of the perovskite solar cell module will be too large, and the efficiency of the perovskite solar cell will be significantly reduced as the cell area increases. If the width of the first lead-out electrode 5 and the second lead-out electrode 6 is set too narrow, the parallel connection between the sub-battery groups 40 will be unreliable, affecting the overall performance and stability of the perovskite solar cell module.

[0045] Optionally, based on the above embodiments, continue to refer to Figure 1 and Figure 2 The perovskite solar cell assembly further includes: a positive electrode lead 8 and a negative electrode lead 9. The positive electrode lead 8 is disposed on the first common conductive area 2 and is electrically connected to the first common conductive area 2. The negative electrode lead 9 is disposed on the second common conductive area 3 and is electrically connected to the second common conductive area 3.

[0046] Specifically, the first common conductive area 2 can be used as the positive electrode of the perovskite solar cell module, the second common conductive area 3 can be used as the negative electrode of the perovskite solar cell module, and the positive electrode lead 8 is arranged in the first common conductive area 2 and is electrically connected to the first common conductive area 2. The negative electrode lead 9 is arranged in the second common conductive area 3 and is electrically connected to the second common conductive area 3. The perovskite solar cell module can be connected to an external device through the positive electrode lead 8 and the negative electrode lead 9, and the perovskite solar cell module can supply power to the external device through the positive electrode lead 8 and the negative electrode lead 9.

[0047] Optionally, based on the above embodiments, continue to refer to Figure 1 and Figure 2 The positive electrode lead 8 includes a conductive tape or a photovoltaic welding tape. The negative electrode lead 9 includes a conductive tape or a photovoltaic welding tape.

[0048] Specifically, the positive lead 8 can be a conductive tape or a photovoltaic welding tape, and the negative lead 9 can also be a conductive tape or a photovoltaic welding tape. Exemplarily, a photovoltaic welding tape is welded on the first common conductive area 2 as the positive lead 8 of the perovskite solar cell module, and another photovoltaic welding tape is welded on the second common conductive area 3 as the negative lead 9 of the perovskite solar cell module.

[0049] Optionally, based on the above embodiments, continue to refer to Figure 1 and Figure 2The first common conductive region 2 includes a bottom conductive layer 41 , and the second common conductive region 3 includes a bottom conductive layer 41 . The first extraction electrode 5 includes a bottom conductive layer 41 , and the second extraction electrode 6 includes a bottom conductive layer 41 .

[0050] Specifically, the first common conductive region 2 may be a bottom conductive layer 41 disposed on the first surface 101 of the substrate 1, the second common conductive region 3 may be a bottom conductive layer 41 disposed on the first surface 101 of the substrate 1, the first lead-out electrode 5 may be a bottom conductive layer 41 disposed on the first surface 101 of the substrate 1, and the second lead-out electrode 6 may be a bottom conductive layer 41 disposed on the first surface 101 of the substrate 1.

[0051] Optionally, based on the above embodiments, continue to refer to Figure 1 and Figure 2 The bottom conductive layer 41 includes an indium tin oxide conductive layer, a fluorine-doped tin oxide conductive layer or an aluminum-doped zinc oxide conductive layer.

[0052] Specifically, the bottom conductive layer 41 may be an indium tin oxide conductive layer, a fluorine-doped tin oxide conductive layer, or an aluminum-doped zinc oxide conductive layer.

[0053] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0054] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A perovskite solar cell module, characterized in that: include: substrate; A first common conductive region is disposed on a first surface of the substrate; A second common conductive region is disposed on the first surface of the substrate; The second common conductive region and the first common conductive region are arranged on the first surface with insulation; A functional coating area is arranged on the first surface of the substrate, and a vertical projection of the functional coating area on the substrate does not overlap with a vertical projection of the first common conductive area on the substrate and a vertical projection of the second common conductive area on the substrate; the functional coating area includes a plurality of sub-battery groups; A plurality of first lead-out electrodes and a plurality of second lead-out electrodes are arranged on the first surface of the substrate, the first lead-out electrodes are used to realize the electrical connection between the bottom electrode of the sub-battery group and the first common conductive area; the second lead-out electrodes are used to realize the electrical connection between the top electrode of the sub-battery group and the second common conductive area.

2. The perovskite solar cell assembly according to claim 1, characterized in that: Also includes: Insulation area; The insulating region is disposed on the first surface of the substrate and is used to isolate the first common conductive region, the second common conductive region and the functional coating region.

3. The perovskite solar cell module according to claim 1, characterized in that: The sub-battery group includes a plurality of sub-batteries; The top electrode of the sub-cell in each sub-cell group is connected to the bottom electrode of the adjacent sub-cell to form a series connection structure.

4. The perovskite solar cell assembly according to claim 3, characterized in that: The subcell comprises a bottom conductive layer, a light absorbing and transmitting layer and a top conductive layer which are stacked; the top conductive layer serves as a top electrode of the subcell, and the bottom conductive layer serves as a bottom electrode of the subcell; The top conductive layer of the sub-cell in each of the sub-cell groups is connected to the bottom conductive layer of the adjacent sub-cell.

5. The perovskite solar cell assembly according to claim 2, characterized in that: The width of the insulating area ranges from 0.5 mm to 2 mm.

6. The perovskite solar cell module according to claim 1, characterized in that: The width of the first lead-out electrode is in the range of 0.5 mm to 2 mm, and the width of the second lead-out electrode is in the range of 0.5 mm to 2 mm.

7. The perovskite solar cell module according to claim 1, characterized in that: Also includes: A positive lead and a negative lead; The positive electrode lead is disposed on the first common conductive area and electrically connected to the first common conductive area; the negative electrode lead is disposed on the second common conductive area and electrically connected to the second common conductive area.

8. The perovskite solar cell module according to claim 7, characterized in that: The positive electrode lead includes a conductive tape or a photovoltaic welding tape; the negative electrode lead includes a conductive tape or a photovoltaic welding tape.

9. The perovskite solar cell module according to claim 1, characterized in that: The first common conductive region includes a bottom conductive layer, and the second common conductive region includes a bottom conductive layer; the first extraction electrode includes a bottom conductive layer, and the second extraction electrode includes a bottom conductive layer.

10. The perovskite solar cell module according to claim 4 or 9, characterized in that: The bottom conductive layer includes an indium tin oxide conductive layer, a fluorine-doped tin oxide conductive layer or an aluminum-doped zinc oxide conductive layer.

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