High-transmittance perovskite cell structure and manufacturing method thereof

Abstract

The application discloses a high-transmittance perovskite battery structure and a manufacturing method thereof, and belongs to the technical field of perovskite batteries. The high-transmittance perovskite battery structure comprises a front plate glass, a transparent conductive layer, a P1 laser scribe, a first charge transport layer, a perovskite battery layer, a second charge transport layer, a P2 laser scribe, a back electrode layer, a P3 laser scribe and a bus bar. The front plate glass has opposite light-incoming surfaces and a light-emitting surface, and the light-emitting surface is provided with a plurality of protrusions. The transparent conductive layer is arranged on the light-emitting surface. The P1 laser scribe is used for cutting the transparent conductive layer. The first charge transport layer is arranged on the transparent conductive layer. The perovskite battery layer is arranged on the first charge transport layer. The second charge transport layer is arranged on the perovskite battery layer. The P2 laser scribe is used for cutting the second charge transport layer, the perovskite battery layer and the first charge transport layer. The back electrode layer is arranged on the second charge transport layer and filled into the P2 laser scribe to be electrically connected with the transparent conductive layer. The P3 laser scribe is used for cutting the back electrode layer, the second charge transport layer, the perovskite battery layer and the first charge transport layer. The bus bar is used for connecting the perovskite battery layers, which are cut by the protrusions, in parallel. An encapsulating adhesive film is arranged on the front plate glass. A back plate glass is arranged on the encapsulating adhesive film. Butyl adhesive is arranged between the front plate glass and the back plate glass to isolate external water vapor.

Description

Technical Field

[0001] This invention relates to the field of thin-film battery technology, specifically to a high-transmittance perovskite battery structure and its fabrication method. Background Technology

[0002] Currently, perovskite thin-film solar cell modules generally require four laser scribing lines (i.e., P1, P2, P3, and P4 laser scribing lines) to achieve cell partitioning.

[0003] In certain specific applications, photovoltaic modules need to have high light transmittance. To achieve light-transmitting photovoltaic modules, current technologies generally require P5 laser scribing during manufacturing to create gaps for light transmission (currently, P5 laser scribing typically uses high-energy nanosecond infrared lasers). However, P5 laser scribing increases damage to the perovskite cell layer and the heat-affected zone, thus affecting the module's efficiency. Summary of the Invention

[0004] The purpose of this invention is to address the problem that existing transparent perovskite modules require P5 laser scribing during fabrication, which increases damage to the perovskite cell layer and the heat-affected zone, leading to reduced module efficiency. This invention designs a high-transmittance perovskite cell structure and its fabrication method, which can reduce the damage and heat impact of P5 laser scribing on the perovskite cell, thereby avoiding a decrease in module efficiency.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0006] This invention provides a high-transmittance perovskite solar cell structure, the perovskite solar cell structure comprising:

[0007] The front glass has a first direction and a second direction that are perpendicular to each other, and the front glass also has a light-incident surface and a light-exit surface. The light-exit surface is provided with a plurality of protrusions parallel to the second direction, and the protrusions are used to increase light transmittance.

[0008] A transparent conductive layer is stacked on the non-protruding area of ​​the light-emitting surface, and the transparent conductive layer is separated by a number of protrusions.

[0009] A plurality of P1 laser scribe lines are arranged parallel to the first direction to cut the transparent conductive layer.

[0010] A first charge transport layer is stacked on the transparent conductive layer and located in the non-protruding region; the first charge transport layer is also separated by a number of protrusions.

[0011] A perovskite solar cell layer is stacked on the first charge transport layer and located in the non-protruding region. Similarly, the perovskite solar cell layer is also separated by several protrusions to form several rows of perovskite solar cell strings.

[0012] A second charge transport layer is stacked on the perovskite solar cell layer and located in the non-protruding region. The second charge transport layer is also separated by several protrusions.

[0013] A plurality of P2 laser scribes are arranged parallel to the P1 laser scribes to cut through the second charge transport layer, the perovskite cell layer and the first charge transport layer (without cutting through the transparent conductive layer), thereby forming a plurality of perovskite sub-cells.

[0014] A back electrode layer is stacked on the second charge transport layer and partially filled into the P2 laser scribing channel and electrically connected to the transparent conductive layer, thereby connecting several perovskite sub-cells in series.

[0015] Several P3 laser scribing lines are arranged parallel to the P2 laser scribing lines to cut the back electrode layer, the second charge transport layer, the perovskite cell layer and the first charge transport layer, but not to cut the transparent conductive layer.

[0016] Busbars are used to connect the perovskite solar cell layers that are separated by the protrusions in parallel, that is, to connect several rows of perovskite solar cells in parallel through busbars.

[0017] An encapsulating film is stacked on the back electrode layer;

[0018] Back panel glass, which is stacked on the encapsulating film;

[0019] And butyl rubber, which is disposed between the front glass and the back glass to isolate external moisture and prevent moisture from entering the perovskite solar cell layer.

[0020] Furthermore, a high-transmittance perovskite solar cell structure is provided in which the protrusions are configured as continuous or discontinuous elongated strip structures.

[0021] Furthermore, a high-transmittance perovskite solar cell structure is provided: the height H of the protrusion is set to 0.5μm≤H≤1.0μm, the width W of the protrusion is set to 500.0μm≤W≤5000.0μm, and the spacing S between adjacent protrusions is set to S≥50.0mm.

[0022] Specifically, the protruding structure corresponds to the light-transmitting area, and the light transmittance of the perovskite solar cell structure is determined by the width W of the protruding structure and the number of protrusions.

[0023] Furthermore, a high-transmittance perovskite solar cell structure is provided: the angle between the protrusion and the light-emitting surface is α, and α > 70°.

[0024] Furthermore, a high-transmittance perovskite solar cell structure is provided where the top of the protrusion is configured as a planar structure.

[0025] Setting the top of the raised structure to a flat structure can increase the light transmittance of the glass.

[0026] This invention also provides a method for fabricating a high-transmittance perovskite solar cell structure, the method comprising the following steps:

[0027] S1. A glass substrate having a first direction and a second direction is provided, and a plurality of protrusions parallel to the second direction are formed on its surface by a rolling process, thereby obtaining a front panel glass;

[0028] S2. A transparent conductive layer is deposited on the non-protruding area of ​​the front glass panel, and the transparent conductive layer is separated by several protrusions. Then, P1 laser scribing is performed along the first direction to form several P1 laser scribing lines that cut through the transparent conductive layer (P1 does not cut through the protrusions).

[0029] S3. Deposit a first charge transport layer on the transparent conductive layer;

[0030] S4. A perovskite solar cell layer is deposited on the first charge transport layer. The perovskite solar cell layer is separated by several protrusions to form several rows of perovskite solar cell strings.

[0031] S5. A second charge transport layer is deposited on the perovskite solar cell layer, and then P2 laser scribing is performed along the first direction to form several P2 laser scribing lines that cut through the second charge transport layer, the perovskite solar cell layer and the first charge transport layer. After cutting through the perovskite solar cell layer, several perovskite sub-cells are obtained.

[0032] S6. Deposit a back electrode layer on the second charge transport layer, and make the deposited material of the back electrode layer partially fill the P2 laser scribing and form an electrical connection with the transparent conductive layer, so as to connect several perovskite sub-cells in series.

[0033] S7. Perform P3 laser scribing along the first direction to obtain several P3 laser scribing lines that cut through the back electrode layer, the second charge transport layer, the perovskite cell layer and the first charge transport layer.

[0034] S8. Weld the busbars to form the perovskite solar cell layers that are separated by the protrusions in parallel, that is, to connect several rows of perovskite solar cells in parallel through the busbars.

[0035] S9. Sequentially stack the encapsulating film and the back glass on the back electrode layer, then place butyl adhesive between the front glass and the back glass to isolate external moisture, perform P4 laser scribing for edge cleaning, and install the photovoltaic junction box after lamination to complete the fabrication of the high-transmittance perovskite cell structure.

[0036] The beneficial effects of this invention are:

[0037] Generally, transparent photovoltaic (PV) modules of the same size have lower power generation efficiency than ordinary PV modules because they sacrifice effective power generation area and increase the light transmission gap. However, for certain specific applications, higher light transmittance is required, necessitating the use of transparent PV modules. Existing transparent perovskite modules typically require a P5 laser scribing after four laser scribing lines (P1, P2, P3, and P4) to define the light-transmitting area. However, P5 laser scribing increases damage to the perovskite cell layer and creates a heat-affected zone, leading to a decrease in module power. This invention addresses this by creating a protrusion on the front glass panel, using this protrusion as the light-transmitting area, thus reducing the damage and heat impact caused by P5 laser scribing. This high-transmittance perovskite cell structure of the present invention can improve power generation efficiency by more than 2.0% compared to transparent perovskite modules manufactured using P5 laser scribing.

[0038] Meanwhile, the high-transmittance perovskite solar cell structure of this invention simplifies the manufacturing process and significantly reduces manufacturing costs by eliminating one laser scribing (P5 laser scribing) process. Attached Figure Description

[0039] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the 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.

[0040] Figure 1 This is a top view of the front glass panel provided in Embodiment 1 of the present invention;

[0041] Figure 2 This is a cross-sectional view of the front glass panel provided in Embodiment 1 of the present invention;

[0042] Figure 3 This is a top view of the high-transmittance perovskite solar cell structure provided in Embodiment 1 of the present invention;

[0043] Figure 4 for Figure 3 Cross-sectional view along the AA direction;

[0044] Figure 5 for Figure 3 Cross-sectional view along the BB direction;

[0045] Figure 6 This is a top view of the front glass panel provided in Embodiment 3 of the present invention;

[0046] Figure 7 A top view of the high-transmittance perovskite solar cell structure fabricated for Comparative Example 1;

[0047] Figure 8 for Figure 7 Cross-sectional view along the AA direction.

[0048] The markings in the diagram are: 1-front glass, 2-transparent conductive layer, 3-P1 laser scribing, 4-first charge transport layer, 5-perovskite cell layer, 6-second charge transport layer, 7-P2 laser scribing, 8-back electrode layer, 9-P3 laser scribing, 10-busbar, 11-light-incident surface, 12-light-outceasing surface, 13-protrusion, 14-non-protrusion area, 15-encapsulation film, 16-back glass, 17-butyl adhesive, 18-P5 laser scribing, 51-perovskite sub-cell, 52-perovskite cell string. Detailed Implementation

[0049] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0050] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "top," and "bottom," etc., indicating orientation or positional relationships, are merely for the convenience of describing the invention 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 of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," etc., 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.

[0051] Example 1

[0052] like Figures 1-5 As shown, this embodiment 1 designs a high-transmittance perovskite solar cell structure, which includes:

[0053] The front glass 1 has a first direction and a second direction that are perpendicular to each other. The front glass 1 also has a light-incident surface 11 and a light-exit surface 12. The light-exit surface 12 is provided with a plurality of protrusions 13 parallel to the second direction. The protrusions 13 are configured as continuous elongated structures with a height H of 0.8 μm, a width W of 1.0 mm, and a spacing S between adjacent protrusions 13 of 100.0 mm. The protrusions 13 are perpendicular to the light-exit surface 12 (i.e., α = 90°). The top of the protrusions 13 is configured as a planar structure to increase light transmittance.

[0054] A transparent conductive layer 2 is stacked in the non-protruding area 14 on the light-emitting surface 12, that is, the transparent conductive layer 2 is separated by the protrusion 13.

[0055] Several P1 laser scribe lines 3 are arranged parallel to the first direction to cut the transparent conductive layer 2 but not the protrusion 13.

[0056] The first charge transport layer 4 is stacked on the transparent conductive layer 2 and located in the non-protruding region 14. Similarly, the first charge transport layer 4 is also separated by the protrusion 13.

[0057] The perovskite cell layer 5 is stacked on the first charge transport layer 4 and located in the non-protrusion region 14. Similarly, the perovskite cell layer 5 is also separated by the protrusion 13, thereby forming several rows of perovskite cell strings 52 parallel to the second direction.

[0058] The second charge transport layer 6 is stacked on the perovskite solar cell layer 5 and located in the non-protruding region 14. Similarly, the second charge transport layer 6 is also separated by the protrusion 13.

[0059] A plurality of P2 laser scribing lines 7 are arranged parallel to the P1 laser scribing lines 3 to cut the second charge transport layer 6, the perovskite cell string 52 and the first charge transport layer 4 (without cutting the transparent conductive layer 2), thereby forming a plurality of perovskite sub-cells 51.

[0060] The back electrode layer 8 is stacked on the second charge transport layer 6 and partially filled into the P2 laser scribing 7 and electrically connected to the transparent conductive layer 2, thereby connecting a number of perovskite sub-cells 51 in series.

[0061] A plurality of P3 laser scribing lines 9 are arranged parallel to the P2 laser scribing lines 7, and are used to cut the back electrode layer 8, the second charge transport layer 6, the perovskite cell layer 5 and the first charge transport layer 4.

[0062] Busbar 10 is used to connect the perovskite cell layers 5 that are separated by the protrusion 13 in parallel, that is, to connect several perovskite cell strings 52 in parallel through busbar 10.

[0063] An encapsulating film 15 is stacked on the back electrode layer 8;

[0064] Back panel glass 16 is stacked on the encapsulating film 15;

[0065] And butyl rubber 17, which is disposed between the front glass 1 and the back glass 16 to isolate external moisture from entering the perovskite solar cell layer.

[0066] Example 2

[0067] A method for fabricating a high-transmittance perovskite solar cell structure is provided for Embodiment 1 above. The method includes the following steps:

[0068] S1. A glass substrate having a first direction and a second direction perpendicular to each other is provided. A plurality of elongated protrusions 13 parallel to the second direction are formed on the surface of the glass substrate by a rolling process, thereby obtaining the front panel glass 1.

[0069] S2. An ITO conductive film is deposited on the non-protruding area 14 of the front glass 1 to form a transparent conductive layer 2. The transparent conductive layer 2 is separated by the protrusion 13. Then, P1 laser scribing is performed along the first direction (without cutting the protrusion 13) to form a number of P1 laser scribing lines 3 that cut through the transparent conductive layer 2.

[0070] S3. NiO is deposited on the transparent conductive layer 2 to form a first charge transport layer 4, and the first charge transport layer 4 is separated by the protrusion 13.

[0071] S4. A perovskite cell layer 5 is deposited on the first charge transport layer 4, and the perovskite cell layer 5 is separated by the protrusion 13, thereby forming several rows of perovskite cell strings 52 parallel to the second direction.

[0072] S5. SnO2 is deposited on the perovskite cell layer 5 (i.e., on each perovskite cell string 52) to form a second charge transport layer 6. Then, P2 laser scribing is performed along the first direction to form several P2 laser scribing lines 7 that cut through the second charge transport layer 6, each perovskite cell string 52 and the first charge transport layer 4, but do not cut through the transparent conductive layer 2 and the protrusion 13. After cutting through the perovskite cell string 52, several perovskite sub-cells 51 are obtained.

[0073] S6. A back electrode layer 8 is deposited on the second charge transport layer 6, and the deposited material of the back electrode layer is partially filled into the P2 laser scribing 7 and electrically connected to the transparent conductive layer 2, thereby realizing the series connection of several perovskite sub-cells 51.

[0074] S7. Perform P3 laser scribing along the first direction to obtain several P3 laser scribing lines 9 that cut through the back electrode layer 8, the second charge transport layer 6, the perovskite battery layer 5 and the first charge transport layer 4, but do not cut through the transparent conductive layer 2.

[0075] S8. Weld the busbar 10 to form the perovskite cell layer 5 separated by the protrusion 13 in parallel, that is, to form a number of perovskite cell strings 52 in parallel through the busbar 10.

[0076] S9. On the back electrode layer 8, the encapsulating film 15 and the back glass 16 are stacked in sequence. Then, butyl rubber 17 is placed between the front glass 1 and the back glass 16 to isolate external moisture. P4 laser scribing is performed for edge cleaning. After lamination and molding, the photovoltaic junction box is installed to complete the fabrication of the high-transmittance perovskite cell structure.

[0077] Example 3

[0078] The difference between Example 3 and Example 1 is that in Example 3, the protrusions 13 on the light-emitting surface 12 of the front glass 1 are non-continuous elongated structures, such as... Figure 6 As shown, the rest is the same as in Example 1.

[0079] Comparative Example 1

[0080] like Figures 7-8 As shown in Comparative Example 1, a method for fabricating a high-transmittance perovskite module is provided, which includes the following steps:

[0081] S1. Provide a glass substrate having a first direction and a second direction that are perpendicular to each other, and use it as the front glass 1;

[0082] S2. An ITO conductive film is deposited on the front glass 1 to form a transparent conductive layer 2. Then, P1 laser scribing is performed along the first direction to form several P1 laser scribing lines 3 that cut through the transparent conductive layer 2.

[0083] S3. Deposit NiO on the transparent conductive layer 2 to form the first charge transport layer 4;

[0084] S4. Deposit a perovskite solar cell layer 5 on the first charge transport layer 4;

[0085] S5. SnO2 is deposited on the perovskite solar cell layer 5 to form a second charge transport layer 6. Then, P2 laser scribing is performed along the first direction to form several P2 laser scribing lines 7 that cut through the second charge transport layer 6, the perovskite solar cell layer 5 and the first charge transport layer 4, but do not cut through the transparent conductive layer 2.

[0086] S6. Deposit a back electrode layer 8 on the second charge transport layer 6, and make the deposited material of the back electrode layer partially fill the P2 laser scribing 7 and form an electrical connection with the transparent conductive layer 2.

[0087] S7. Continue to perform P3 laser scribing along the first direction to obtain several P3 laser scribing lines 9 that cut through the back electrode layer 8, the second charge transport layer 6, the perovskite battery layer 5 and the first charge transport layer 4, but do not cut through the transparent conductive layer 2.

[0088] S8. Perform P5 laser scribing along the second direction to completely sever the back electrode layer 8, the second charge transport layer 6, the perovskite battery layer 5, the first charge transport layer 4, and the transparent conductive layer 2, forming several P5 laser scribing lines 18.

[0089] S9. Weld the busbar 10 to form the perovskite solar cell layer 5 that has been cut by the P5 laser scribing 18 in parallel.

[0090] S10. Sequentially stack the encapsulating film 15 and the back sheet glass 16 on the back electrode layer 8. Then, place butyl adhesive 17 between the front sheet glass 1 and the back sheet glass 16 to isolate external moisture. Perform P4 laser scribing for edge cleaning. After lamination and molding, install the photovoltaic junction box to complete the fabrication of the high-transmittance perovskite module.

[0091] The difference between Comparative Example 1 and Example 2 is that the high-transmittance perovskite module made in Comparative Example 1 was scribed with P5 laser.

[0092] Testing revealed that the high-transmittance perovskite module of Comparative Example 1 had a power generation efficiency approximately 2.0% lower than the high-transmittance perovskite cell structure fabricated in Example 2. The reason for this is that the high-transmittance perovskite cell structure fabricated in this invention eliminates one laser scribing (P5 laser scribing) process. Therefore, the perovskite cell layer of this invention suffers less damage and thermal impact from laser scribing, thus avoiding a decrease in module power.

[0093] Meanwhile, the high-transmittance perovskite solar cell structure provided by this invention has a simpler manufacturing process and lower manufacturing cost because it eliminates one laser scribing process.

[0094] The above-described preferred embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of the invention. Any obvious variations or modifications derived from the technical solutions of the present invention are still within the protection scope of the present invention.

Claims

1. A high-transmittance perovskite solar cell structure, characterized in that, The perovskite solar cell structure includes: The front glass (1) has a first direction and a second direction, and the front glass (1) also has a light-incident surface (11) and a light-exit surface (12) opposite to each other. The light-exit surface (12) is provided with a plurality of protrusions (13) parallel to the second direction. The protrusions (13) are used to increase light transmittance. A transparent conductive layer (2) is stacked in the non-protruding area (14) on the light-emitting surface (12), and the transparent conductive layer (2) is separated by a number of protrusions (13); A plurality of P1 laser scribe lines (3) are arranged parallel to the first direction for cutting the transparent conductive layer (2); A first charge transport layer (4) is stacked on the transparent conductive layer (2); A perovskite solar cell layer (5) is stacked on the first charge transport layer (4); A second charge transport layer (6) is stacked on the perovskite battery layer (5); A plurality of P2 laser scribing lines (7) are arranged parallel to the P1 laser scribing lines (3) to cut the second charge transport layer (6), the perovskite cell layer (5) and the first charge transport layer (4) to form a plurality of perovskite sub-cells (51). The back electrode layer (8) is stacked on the second charge transport layer (6) and partially filled into the P2 laser scribing (7) and electrically connected to the transparent conductive layer (2), thereby connecting several perovskite sub-cells (51) in series. A plurality of P3 laser scribing lines (9) are arranged parallel to the P2 laser scribing lines (7) to cut the back electrode layer (8), the second charge transport layer (6), the perovskite cell layer (5) and the first charge transport layer (4). Busbar (10) for connecting perovskite cell layers (5) that will be separated by the protrusion (13) in parallel; An encapsulating film (15) is stacked on the back electrode layer (8); Back panel glass (16) is stacked on the encapsulating film (15); And butyl rubber (17), which is disposed between the front glass (1) and the back glass (16) to isolate external moisture.

2. The high-transmittance perovskite solar cell structure according to claim 1, characterized in that, The protrusion (13) is configured as a continuous or discontinuous strip structure.

3. A high-transmittance perovskite solar cell structure according to claim 1 or 2, characterized in that, The height H of the protrusion (13) is set to 0.5μm≤H≤1.0μm, and its width W is set to 500.0μm≤W≤5000.0μm; the spacing S between adjacent protrusions (13) is set to S≥50.0mm.

4. A high-transmittance perovskite solar cell structure according to claim 1 or 2, characterized in that, The angle between the protrusion (13) and the light-emitting surface (12) is α, and α > 70°.

5. A high-transmittance perovskite solar cell structure according to claim 1 or 2, characterized in that, The top of the protrusion (13) is configured as a planar structure.

6. A method for fabricating a high-transmittance perovskite solar cell structure according to any one of claims 1 to 5, characterized in that, The method includes the following steps: S1. Provide a glass substrate having a first direction and a second direction, and form a plurality of protrusions (13) parallel to the second direction on its surface by a rolling process, thereby obtaining the front panel glass (1). S2. A transparent conductive layer (2) is deposited on the non-protruding area (14) of the front glass (1), and the transparent conductive layer (2) is separated by a number of protrusions (13). Then, P1 laser scribing is performed along the first direction to form a number of P1 laser scribing lines (3) that cut through the transparent conductive layer (2). S3. Deposit a first charge transport layer (4) on the transparent conductive layer (2); S4. Deposit a perovskite solar cell layer (5) on the first charge transport layer (4); S5. A second charge transport layer (6) is deposited on the perovskite cell layer (5), and then P2 laser scribing is performed along the first direction to form several P2 laser scribing lines (7) that cut through the second charge transport layer (6), the perovskite cell layer (5) and the first charge transport layer (4). After cutting through the perovskite cell layer (5), several perovskite sub-cells (51) are obtained. S6. A back electrode layer (8) is deposited on the second charge transport layer (6), and the deposited material of the back electrode layer is partially filled into the P2 laser scribing (7) and electrically connected to the transparent conductive layer (2) to connect a plurality of perovskite sub-cells (51) in series. S7. Perform P3 laser scribing along the first direction to obtain several P3 laser scribing lines (9) that cut through the back electrode layer (8), the second charge transport layer (6), the perovskite cell layer (5) and the first charge transport layer (4). S8. Weld the busbars (10) to form the perovskite cell layers (5) separated by the protrusions (13) in parallel. S9. On the back electrode layer (8), the encapsulating film (15) and the back glass (16) are stacked in sequence. Then, butyl rubber (17) for isolating external moisture is placed between the front glass (1) and the back glass (16). P4 laser scribing is performed for edge cleaning. After lamination and molding, the photovoltaic junction box is installed to complete the fabrication of the high-transmittance perovskite battery structure.

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