Perovskite solar cell module

Abstract

Disclosed in the present invention is a perovskite solar cell module. The cell module comprises: a substrate; a first common conductive region, which is disposed on a first surface of the substrate; a second common conductive region, which is disposed on the first surface of the substrate, the second common conductive region and the first common conductive region being spaced apart and insulated from each other on the first surface; a functional coating region, which is disposed on the first surface of the substrate, the vertical projection of the functional coating region on the substrate not overlapping with the vertical projection of the first common conductive region on the substrate and the vertical projection of the second common conductive region on the substrate, and the functional coating region comprising a plurality of sub-cell groups; and a plurality of first lead-out electrodes and a plurality of second lead-out electrodes, which are disposed on the first surface of the substrate, wherein the first lead-out electrodes are configured to electrically connect bottom electrodes of the sub-cell groups to the first common conductive region, and the second lead-out electrodes are configured to electrically connect top electrodes of the sub-cell groups to the second common conductive region. The present invention enables the voltage and current of the perovskite solar cell module to be controllable.

Description

A perovskite solar cell module Technical Field

[0001] This invention relates to the field of energy technology, and in particular to a perovskite solar cell module. Background Technology

[0002] Perovskite solar cells, as a new generation of photovoltaic cells, are showing increasing efficiency and stability, making them a candidate for mainstream photovoltaic products in the future.

[0003] Currently, perovskite solar cell modules are connected in series, exhibiting characteristics of high voltage and low current. However, photovoltaic products generally have certain requirements for voltage and current values ​​in practical applications, and perovskite solar cells also need to meet certain voltage and current matching requirements when forming a complete tandem module with crystalline silicon. The current series connection method of perovskite solar cell modules makes their design voltage and current uncontrollable, which cannot meet the needs of practical applications. Summary of the Invention

[0004] This invention provides a perovskite solar cell module to solve the problem that the design voltage and current of current perovskite solar cell modules are uncontrollable and cannot meet the needs of practical applications.

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

[0006] Base;

[0007] A first common conductive region is disposed on the 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 disposed insulated from each other on the first surface.

[0009] A functional coating area is disposed on the first surface of the substrate. The vertical projection of the functional coating area on the substrate does not overlap with the vertical projections of the first common conductive area and the second common conductive area on the substrate. The functional coating area includes multiple sub-cell groups.

[0010] Multiple first lead-out electrodes and multiple second lead-out electrodes are disposed 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-cell group and the first common conductive region; the second lead-out electrodes are used to realize the electrical connection between the top electrode of the sub-cell group and the second common conductive region.

[0011] Optionally, the perovskite solar cell module may also include: an insulating region;

[0012] An insulating region is disposed on the first surface of the substrate to isolate the first common conductive region, the second common conductive region, and the functional coating region.

[0013] Optionally, the sub-battery pack may include multiple sub-cells;

[0014] The top electrode of each sub-cell in each sub-cell group is connected to the bottom electrode of the 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 stacked together; the top conductive layer serves as the top electrode of the sub-cell, and the bottom conductive layer serves as the bottom electrode of the sub-cell.

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

[0017] Optionally, the width of the insulation zone can range from 0.5mm to 2mm.

[0018] Optionally, the width of the first lead electrode is in the range of 0.5mm-2mm, and the width of the second lead electrode is in the range of 0.5mm-2mm.

[0019] Optionally, the perovskite solar cell module also includes: positive electrode leads and negative electrode leads;

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

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

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

[0023] Optionally, the bottom conductive layer may include 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 this invention provides a first common conductive region and a second common conductive region. The bottom electrodes of multiple sub-cell groups in the functional coating region can be connected to the first common conductive region via a first lead electrode, and the top electrodes of multiple sub-cell groups can be connected to the second common conductive region via a second lead electrode, thereby achieving parallel connection of multiple sub-cell groups. The number of sub-cell groups in the functional coating region can be arbitrarily set according to actual needs. The number of sub-cell groups determines the current value of the perovskite solar cell module, thus making the current of the perovskite solar cell module controllable, meeting the needs of practical applications, and making it easy for the perovskite solar cell module to form a current-customizable stacked module with crystalline silicon modules.

[0025] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

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

[0028] Figure 2 is a cross-sectional structural diagram of a perovskite solar cell module provided in an embodiment of the present invention. Embodiments of the present invention

[0029] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort 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, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented 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.

[0031] Figure 1 is a top view of a perovskite solar cell module provided in an embodiment of the present invention, and Figure 2 is a cross-sectional structural diagram of a perovskite solar cell module provided in an embodiment of the present invention. Figure 2 is a cross-sectional structural diagram of Figure 1 after being cut along the dotted line AB. As shown in Figures 1 and 2, the perovskite solar cell module includes: a substrate 1; a first common conductive region 2 disposed on a first surface 101 of the substrate 1; a second common conductive region 3 disposed on the first surface 101 of the substrate 1; the second common conductive region 3 and the first common conductive region 2 are disposed at an insulated interval on the first surface 101; a functional coating region 4 disposed on the first surface 101 of the substrate 1, wherein the vertical projection of the functional coating region 4 on the substrate 1 does not overlap with the vertical projections of the first common conductive region 2 and the second common conductive region 3 on the substrate 1; the functional coating region 4 includes multiple sub-cell groups 40; multiple first lead-out electrodes 5 and multiple second lead-out electrodes 6 disposed on the first surface 101 of the substrate 1; the first lead-out electrodes 5 are used to realize the electrical connection between the bottom electrode of the sub-cell group 40 and the first common conductive region 2. The second lead electrode 6 is used to realize the electrical connection between the top electrode of the sub-battery pack 40 and the second common conductive region 3.

[0032] Specifically, the substrate 1 can be a glass substrate. The first common conductive region 2 and the second common conductive region 3 are spaced apart and insulated from each other on the first surface 101 of the substrate 1. Both the first common conductive region 2 and the second common conductive region 3 can 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 can include a bottom conductive layer 41, a light-absorbing and transporting layer 42, and a top conductive layer 43 stacked on the first surface 101 of the substrate 1. The functional coating region 4 can include multiple sub-cell groups 40. Figures 1 and 2 exemplarily show that the functional coating region 4 includes four sub-cell groups 40. In some embodiments of the present invention, the number of sub-cell groups 40 in the functional coating region 4 can be greater than four or less than four, and no specific limitation is made here.

[0033] The bottom conductive layer 41 in the functional coating area 4 is provided with multiple first grooves 45, which isolate the bottom conductive layer 41 into multiple bottom electrodes. The light-absorbing and transmitting layer 42 in the functional coating area 4 is provided with multiple second grooves 46, which isolate the light-absorbing and transmitting layer 42 into multiple light-absorbing and transmitting sections. The top conductive layer 43 in the functional coating area 4 is provided with multiple third grooves 47, which isolate the top conductive layer 43 into multiple top electrodes. The vertical projections of the first grooves 45, second grooves 46, and third grooves 47 on the substrate 1 do not coincide. The light-absorbing and transmitting layer 42 can fill the first grooves 45, and the top conductive layer 43 can also fill the second grooves 46. The top electrode isolated by the third groove 47 on one side edge of each sub-cell group 40 serves as the top electrode of the sub-cell group 40, and the bottom electrode isolated by the first groove 45 on the other side edge of each sub-cell group 40 serves as the bottom electrode of the sub-cell group 40. The top electrode of each sub-cell group 40 in the functional coating area 4 is connected to the second lead electrode 6, and through the second lead electrode 6, it is connected to the second common conductive area 3. The bottom electrode of each sub-cell group 40 in the functional coating area 4 is connected to the first lead electrode 5, and through the first lead electrode 5, it is connected to the first common conductive area 2. The bottom electrode of the sub-cell group 40 at the edge of the functional coating area 4 can be directly connected to the first common conductive area 2, or it can be integrally formed. This enables the parallel connection of multiple sub-cell groups 40 in the functional coating area 4.

[0034] The technical solution of this invention provides a first common conductive region and a second common conductive region. The bottom electrodes of multiple sub-cell groups in the functional coating region can be connected to the first common conductive region via a first lead electrode, and the top electrodes of multiple sub-cell groups can be connected to the second common conductive region via a second lead electrode, thereby achieving parallel connection of multiple sub-cell groups. The number of sub-cell groups in the functional coating region can be arbitrarily set according to actual needs. The number of sub-cell groups determines the current value of the perovskite solar cell module, thus making the current of the perovskite solar cell module controllable, meeting the needs of practical applications, and making it easy for the perovskite solar cell module to form a current-customizable stacked module with crystalline silicon modules.

[0035] Optionally, based on the above embodiments and continuing to refer to Figures 1 and 2, the perovskite solar cell module 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 region 7 is also provided on the first surface 101 of the substrate 1. The insulating region 7 can achieve insulation isolation between the first common conductive region 2 and the second common conductive region 3, as well as insulation isolation between the first common conductive region 2 and the functional coating region 4, and insulation isolation between the second common conductive region 3 and the functional coating region 4.

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

[0038] Specifically, each sub-battery pack 40 may include multiple sub-batteries 44. Figure 2 exemplarily shows that each sub-battery pack 40 includes four sub-batteries 44. In some embodiments of the present invention, the number of sub-batteries 44 in each sub-battery pack 40 may be greater than four or less than four, and no specific limitation is made here. Each sub-battery pack 40 includes a bottom conductive layer 41, a light-absorbing and transmitting layer 42, and a top conductive layer 43 stacked on the first surface 101 of the substrate 1. A first groove 45 divides the bottom conductive layer 41 into multiple bottom electrodes, which can be the bottom electrodes of the sub-batteries 44. A second groove 46 divides the light-absorbing and transmitting layer 42 into multiple light-absorbing and transmitting sections. Each sub-battery 44 includes one light-absorbing and transmitting section, which can fill the first groove 45. A third groove 47 divides the top conductive layer into multiple top electrodes, which can be the top electrodes of the sub-batteries 44. The top electrode can be filled in the second groove 46, so that the top electrode of the sub-battery 44 inside each sub-battery pack 40 can be connected to the bottom electrode of the adjacent sub-battery 44, thereby realizing that each sub-battery pack 40 includes multiple sub-batteries 44 connected in series. The top electrode of the sub-battery 44 on one side edge of each sub-battery pack 40 can serve as the top electrode of the sub-battery pack 40, and the bottom electrode of the sub-battery 44 on the other side edge of each sub-battery pack 40 can serve as the bottom electrode of the sub-battery pack 40. In the technical solution of this invention embodiment, multiple sub-cell groups 40 in the functional coating area 4 are connected in parallel. 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. The number of sub-cell groups 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. This makes the voltage and current of the perovskite solar cell module controllable, meets the actual application requirements, and makes the perovskite solar cell module easier to form a tandem module with customizable voltage and current from crystalline silicon modules.

[0039] Optionally, based on the above embodiments, and continuing to refer to Figures 1 and 2, the sub-cell 44 includes a bottom conductive layer 41, a light-absorbing and transmitting layer 42, and a top conductive layer 43 stacked together. The top conductive layer 43 serves as the top electrode of the sub-cell 44, and the bottom conductive layer 41 serves as the bottom electrode of the sub-cell 44. The top conductive layer 43 of the sub-cell 44 within each sub-cell group 40 is connected to the bottom conductive layer 41 of the adjacent sub-cell 44.

[0040] Specifically, each sub-cell group 40 includes a bottom conductive layer 41, a light-absorbing and transmitting layer 42, and a top conductive layer 43 stacked on the first surface 101 of the substrate 1. A first groove 45 divides the bottom conductive layer 41 into multiple bottom electrodes, which can be the bottom electrodes of the sub-cells 44. A second groove 46 divides the light-absorbing and transmitting layer 42 into multiple light-absorbing and transmitting sections, and each sub-cell 44 includes one light-absorbing and transmitting section, which can fill the first groove 45. A third groove 47 divides the top conductive layer into multiple top electrodes, which can be the top electrodes of the sub-cells 44. The top electrodes can fill the second groove 46, so that the top electrode of the sub-cell 44 inside each sub-cell group 40 can be connected to the bottom electrode of the adjacent sub-cell 44, thereby realizing that each sub-cell group 40 includes multiple sub-cells 44 connected in series.

[0041] Optionally, based on the above embodiments, referring to Figures 1 and 2, the width h1 of the insulating region 7 ranges from 0.5mm to 2mm.

[0042] Specifically, the width h1 of the insulation region 7 can be set to a range of 0.5mm-2mm. If the width h1 of the insulation region 7 is set too wide, the perovskite solar cell module will be too large, and the efficiency of the perovskite solar cell will decrease significantly with the increase of the cell area. If the width h1 of the insulation 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, referring to Figures 1 and 2, the width h2 of the first lead electrode 5 is in the range of 0.5mm-2mm, and the width h3 of the second lead electrode 6 is in the range of 0.5mm-2mm.

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

[0045] Optionally, based on the above embodiments and continuing to refer to Figures 1 and 2, the perovskite solar cell module 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 region 2 and electrically connected to the first common conductive region 2. The negative electrode lead 9 is disposed on the second common conductive region 3 and electrically connected to the second common conductive region 3.

[0046] Specifically, the first common conductive region 2 can serve as the positive electrode of the perovskite solar cell module, and the second common conductive region 3 can serve as the negative electrode. The positive electrode lead 8 is located in the first common conductive region 2 and electrically connected to it. The negative electrode lead 9 is located in the second common conductive region 3 and electrically connected to it. The perovskite solar cell module can be connected to external devices through the positive electrode lead 8 and the negative electrode lead 9, and the perovskite solar cell module can supply power to external devices through the positive electrode lead 8 and the negative electrode lead 9.

[0047] Optionally, based on the above embodiments, and continuing to refer to Figures 1 and 2, the positive electrode lead 8 includes conductive tape or photovoltaic solder ribbon. The negative electrode lead 9 includes conductive tape or photovoltaic solder ribbon.

[0048] Specifically, the positive electrode lead 8 can be conductive tape or photovoltaic solder ribbon, and the negative electrode lead 9 can also be conductive tape or photovoltaic solder ribbon. For example, a photovoltaic solder ribbon is soldered on the first common conductive region 2 as the positive electrode lead 8 of the perovskite solar cell module, and another photovoltaic solder ribbon is soldered on the second common conductive region 3 as the negative electrode lead 9 of the perovskite solar cell module.

[0049] Optionally, based on the above embodiments, and continuing to refer to Figures 1 and 2, the 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 lead-out electrode 5 includes a bottom conductive layer 41, and the second lead-out electrode 6 includes a bottom conductive layer 41.

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

[0051] Optionally, based on the above embodiments, and continuing to refer to Figures 1 and 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 can 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, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0054] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A perovskite solar cell module, characterized in that, include: Base; A first common conductive region is disposed on the 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 provided with insulation at a distance from each other on the first surface; A functional coating area is disposed on a first surface of the substrate, wherein the vertical projection of the functional coating area on the substrate does not overlap with the vertical projections of the first common conductive area and the second common conductive area on the substrate; the functional coating area includes multiple sub-cell groups. Multiple first lead-out electrodes and multiple second lead-out electrodes are disposed 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-cell group and the first common conductive region; the second lead-out electrodes are used to realize the electrical connection between the top electrode of the sub-cell group and the second common conductive region.

2. The perovskite solar cell module 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 pack includes multiple sub-batteries; The top electrode of each 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 module according to claim 3, characterized in that, The sub-cell includes a bottom conductive layer, a light-absorbing and transmitting layer, and a top conductive layer stacked together; the top conductive layer serves as the top electrode of the sub-cell, and the bottom conductive layer serves as the bottom electrode of the sub-cell. The top conductive layer of each sub-cell within each sub-cell group is connected to the bottom conductive layer of the adjacent sub-cell.

5. The perovskite solar cell module according to claim 2, characterized in that, The width of the insulation zone ranges from 0.5mm to 2mm.

6. The perovskite solar cell module according to claim 1, characterized in that, The width of the first lead electrode ranges from 0.5mm to 2mm, and the width of the second lead electrode ranges from 0.5mm to 2mm.

7. The perovskite solar cell module according to claim 1, characterized in that, Also includes: Positive lead and 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 conductive tape or photovoltaic solder tape; the negative electrode lead includes conductive tape or photovoltaic solder 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 lead-out electrode includes a bottom conductive layer, and the second lead-out 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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