Photovoltaic glass

Abstract

The utility model discloses photovoltaic glass which comprises a glass substrate, a photovoltaic cell is arranged on the glass substrate, the photovoltaic cell comprises n sub-cells which are arranged in series, each sub-cell comprises a transparent electrode layer, an N-type buffer layer, a P-type light absorption layer and a back electrode layer which are arranged in a stacked mode, and each transparent electrode layer is tightly attached to the glass substrate. And a first insulating carbon black layer is arranged on the outer surface of the back electrode layer of each sub-battery. The problem that when existing photovoltaic glass is applied to a glass curtain wall, a mirror surface of a back electrode layer reflects light, and particularly the visual impression is affected at night is solved.

Description

[Technical field]

[0001] The utility model belongs to the technical field of photovoltaic glass, and specifically relates to photovoltaic glass. [Background technology]

[0002] Photovoltaic glass, also known as "photoelectric glass", is a special glass that uses solar radiation to generate electricity and has related current lead-out devices and cables. Photovoltaic glass is composed of glass, solar cells, film, back glass, special metal wires, etc. It is widely used, such as solar smart windows, solar pavilions, photovoltaic glass building roofs, and photovoltaic glass curtain walls.

[0003] When photovoltaic glass is applied to glass curtain walls (windows), the back electrode layer on the indoor side is generally made of metal, such as aluminum, silver, etc. Due to the mirror reflective characteristics of metal materials, especially under indoor lights at night, the reflection of the back electrode layer makes the visual experience poor. [Contents of the utility model]

[0004] The utility model aims to provide a photovoltaic glass to solve the problem that when the existing photovoltaic glass is applied to a glass curtain wall, the back electrode layer reflects light, which affects the visual perception especially at night.

[0005] The utility model adopts the following technical scheme: a photovoltaic glass, comprising a glass substrate, a photovoltaic cell is arranged on the glass substrate, the photovoltaic cell comprises n sub-cells arranged in series, each sub-cell comprises a stacked transparent electrode layer, an N-type buffer layer, a P-type light absorption layer and a back electrode layer, each transparent electrode layer is arranged in close contact with the glass substrate; a first insulating carbon black layer is arranged on the outer surface of the back electrode layer of each sub-cell.

[0006] Furthermore, the gaps between adjacent sub-cells are third laser-scribed grooves, each of which is filled with an insulating carbon black layer, namely a second insulating carbon black layer, and each second insulating carbon black layer is connected to an adjacent first insulating carbon black layer.

[0007] Furthermore, after the edges of the photovoltaic cell are cleaned, a fourth laser-scribed groove is obtained, and an insulating carbon black layer is filled in the fourth laser-scribed groove, namely, a third insulating carbon black layer, and the third insulating carbon black layer is connected to the first insulating carbon black layer.

[0008] Furthermore, two busbar grooves are provided, which are respectively located on the surface of the first insulating carbon black layer on the 1st sub-cell and the nth sub-cell, or are provided through the first insulating carbon black layer, and a busbar for connecting to the back electrode layer is provided in each busbar groove.

[0009] Furthermore, two busbar grooves are provided, which are respectively located on the surface of the first insulating carbon black layer on the 1st sub-cell and the nth sub-cell, or are provided through the first insulating carbon black layer, and a busbar for connecting to the back electrode layer is provided in each busbar groove.

[0010] Furthermore, two busbar grooves are provided, one is located at the first insulating carbon black layer on the first sub-cell and the third insulating carbon black layer adjacent thereto, and the other is located at the first insulating carbon black layer on the nth sub-cell and the third insulating carbon black layer; wherein the busbar groove is located on the surface of the insulating carbon black layer, or is provided through the insulating carbon black layer, and a busbar for connecting to the back electrode layer is also provided in each busbar groove.

[0011] Furthermore, a plurality of fifth laser-scribed grooves are arranged perpendicular to and in parallel with the glass substrate, the plurality of fifth laser-scribed grooves divide the photovoltaic cell into a plurality of sub-cell strings, and the fifth laser-scribed grooves penetrate the first insulating carbon black layer, the back electrode layer, the P-type light absorption layer, the N-type buffer layer and the transparent electrode layer.

[0012] Furthermore, a plurality of fifth laser-scribed grooves are arranged perpendicular to and in parallel with the glass substrate, the plurality of fifth laser-scribed grooves divide the photovoltaic cell into a plurality of sub-cell strings, and the fifth laser-scribed grooves penetrate the first insulating carbon black layer, the back electrode layer, the P-type light absorption layer, the N-type buffer layer and the transparent electrode layer.

[0013] Furthermore, a plurality of fifth laser-scribed grooves are arranged perpendicular to and in parallel with the glass substrate, the plurality of fifth laser-scribed grooves divide the photovoltaic cell into a plurality of sub-cell strings, and the fifth laser-scribed grooves penetrate the first insulating carbon black layer, the back electrode layer, the P-type light absorption layer, the N-type buffer layer and the transparent electrode layer.

[0014] Furthermore, a plurality of fifth laser-scribed grooves are arranged perpendicular to and in parallel with the glass substrate, the plurality of fifth laser-scribed grooves divide the photovoltaic cell into a plurality of sub-cell strings, and the fifth laser-scribed grooves penetrate the first insulating carbon black layer, the back electrode layer, the P-type light absorption layer, the N-type buffer layer and the transparent electrode layer.

[0015] The beneficial effect of the utility model is that by arranging an insulating carbon black layer on the back electrode layer of reflective material, the problem of mirror reflection of the back electrode layer affecting visual perception at night can be effectively solved, and because the insulating carbon black layer does not block the front of the battery, the battery area and light exposure remain unchanged.

Brief Description of the Drawings

[0016] Figure 1 This is a schematic structural diagram of Example 1 of a photovoltaic glass of the utility model;

[0017] Figure 2 This is a schematic structural diagram of Example 2 of a photovoltaic glass of the utility model;

[0018] Figure 3 This is a schematic structural diagram of Example 3 of a photovoltaic glass of the utility model;

[0019] Figure 4 This is a schematic structural diagram of Example 4 of a photovoltaic glass of the utility model;

[0020] Figure 5 for Figure 1 A schematic diagram of the structure from a top-down angle;

[0021] Figure 6 This is a schematic structural diagram of Example 5 of a photovoltaic glass of the utility model.

[0022] Among them, 1. glass substrate, 2. transparent electrode layer, 3. N-type buffer layer, 4. P-type light absorption layer, 5. back electrode layer, 6. first insulating carbon black layer, 7. bus bar, P1. first laser-scribed groove, P2. second laser-scribed groove, P3. third laser-scribed groove, P4. fourth laser-scribed groove, P5. fifth laser-scribed groove, 8. bus bar groove, 9. sub-cell. [Specific implementation method]

[0023] The utility model is described in detail below with reference to the accompanying drawings and specific implementation modes.

[0024] Example 1

[0025] A photovoltaic glass, such as Figure 5 As shown, it includes a glass substrate 1, on which a photovoltaic cell is arranged, and the photovoltaic cell includes n sub-cells 9 arranged in series. Figure 1 As shown, each sub-cell 9 includes a transparent electrode layer 2, an N-type buffer layer 3, a P-type light absorbing layer 4 and a back electrode layer 5 which are stacked, and each transparent electrode layer 2 is arranged close to the glass substrate 1; a first insulating carbon black layer 6 is arranged on the outer surface of the back electrode layer 5 of each sub-cell 9. For example, a photovoltaic cell can be arranged on the glass substrate 1 by vacuum coating, and the first insulating carbon black layer 6 can be arranged on the outer surface of the back electrode layer 5.

[0026] This embodiment takes the back electrode layer of cadmium telluride as an example, and its manufacturing process method is: a transparent electrode layer 2 (TCO), an n-type buffer layer 3 (CdS) and a p-type light absorption layer 4 (CdTe) are sequentially plated on a glass substrate 1; a first laser-scribed groove P1 is laser-etched, and the first laser-scribed groove P1 is filled with photoresist insulation; a second laser-scribed groove p2 is laser-etched; a back electrode layer 5Al is then plated on the outer surface of the P-type light absorption layer 4, and at the same time, the second laser-scribed groove p2 is filled with the same material as the back electrode layer 5; a first insulating carbon black layer 6 is plated or coated on the outer surface of the back electrode layer 5; finally, a third laser-scribed groove p3 is laser-etched, and the first insulating carbon black layer 6 is divided into multiple parts; and a fourth laser-scribed groove p4 is laser-etched for edge cleaning.

[0027] Among them, the first laser-scribed groove P1 penetrates the P-type light absorption layer 4, the N-type buffer layer 3 and the transparent electrode layer 2; the second laser-scribed groove p2 penetrates the P-type light absorption layer 4 and the N-type buffer layer 3; the third laser-scribed groove p3 penetrates the first insulating carbon black layer 6, the back electrode layer 5, the P-type light absorption layer 4 and the N-type buffer layer 3; the fourth laser-scribed groove p4 penetrates the first insulating carbon black layer 6, the back electrode layer 5, the P-type light absorption layer 4, the N-type buffer layer 3 and the transparent electrode layer 2.

[0028] Example 2

[0029] A photovoltaic glass, such as Figure 2 As shown, it includes a glass substrate 1, on which a photovoltaic cell is arranged, and the photovoltaic cell includes a plurality of sub-cells 9 arranged in series, each of which includes a transparent electrode layer 2, an N-type buffer layer 3, a P-type light absorption layer 4 and a back electrode layer 5 arranged in layers, and each of which is arranged close to the glass substrate 1; a first insulating carbon black layer 6 is arranged on the outer surface of the back electrode layer 5 of each sub-cell 9. The gap between adjacent sub-cells 9 is a third laser-scribed groove P3, and an insulating carbon black layer is filled in each of the third laser-scribed grooves P3, that is, a second insulating carbon black layer, and each of the second insulating carbon black layers is connected to the adjacent first insulating carbon black layer 6. For example, a photovoltaic cell can be arranged on the glass substrate 1 by vacuum coating, and a first insulating carbon black layer 6 can be arranged on the outer surface of the back electrode layer 5.

[0030] This embodiment takes cadmium telluride as an example of a back electrode layer, and its manufacturing process method is as follows: a transparent electrode layer 2 (TCO), an n-type buffer layer 3 (CdS) and a p-type light absorption layer 4 (CdTe) are sequentially plated on a glass substrate 1; a first laser-scribed groove P1 is laser-etched, and the first laser-scribed groove P1 is filled with photoresist insulation; a second laser-scribed groove p2 is laser-etched; a back electrode layer 5 (Al) is then plated on the outer surface of the p-type light absorption layer 4, and at the same time, the second laser-scribed groove p2 is filled with the same material as the back electrode layer 5; a third laser-scribed groove p3 is laser-etched, and then insulating carbon black, i.e., a first insulating carbon black layer 6, is plated or coated on the outer surface of the back electrode layer 5, and at the same time, the third laser-scribed groove p3 is filled with insulating carbon black, i.e., a second insulating carbon black layer; and a fourth laser-scribed groove p4 is laser-etched to clean the edges.

[0031] Among them, the first laser-scribed groove P1 penetrates the P-type light absorption layer 4, the N-type buffer layer 3 and the transparent electrode layer 2; the second laser-scribed groove p2 penetrates the P-type light absorption layer 4 and the N-type buffer layer 3; the third laser-scribed groove p3 penetrates the back electrode layer 5, the P-type light absorption layer 4 and the N-type buffer layer 3; the fourth laser-scribed groove p4 penetrates the first insulating carbon black layer 6, the back electrode layer 5, the P-type light absorption layer 4, the N-type buffer layer 3 and the transparent electrode layer 2.

[0032] like Figure 1 and Figure 2 As shown, on the basis of the above two embodiments, busbar grooves 8 can be provided on the surface of the first insulating carbon black layer 6 on the first sub-cell and the nth sub-cell, or the busbar grooves 8 are provided through the first insulating carbon black layer 6. A busbar 7 for connecting to the back electrode layer is provided in each busbar groove 8. The busbar 7 is a current guide strip, which includes a positive busbar and a negative busbar, similar to the wire of a circuit, which facilitates the current in and out of the photovoltaic cell.

[0033] Example 3

[0034] A photovoltaic glass, such as Figure 3As shown, it includes a glass substrate 1, on which a photovoltaic cell is arranged. The photovoltaic cell includes a plurality of sub-cells 9 arranged in series, each of which includes a transparent electrode layer 2, an N-type buffer layer 3, a P-type light absorption layer 4 and a back electrode layer 5 arranged in layers, each of which is arranged close to the glass substrate 1; and a first insulating carbon black layer 6 is arranged on the outer surface of the back electrode layer 5 of each sub-cell 9. The gap between adjacent sub-cells 9 is a third laser-scribed groove P3, and an insulating carbon black layer is filled in each of the third laser-scribed grooves P3, that is, a second insulating carbon black layer, and each of the second insulating carbon black layers is connected to the adjacent first insulating carbon black layer 6. After cleaning the edges of the photovoltaic cell, a fourth laser-scribed groove P4 is obtained, and an insulating carbon black layer is filled in the fourth laser-scribed groove P4, that is, a third insulating carbon black layer, and the third insulating carbon black layer is connected to the first insulating carbon black layer 6. For example, a photovoltaic cell can be arranged on the glass substrate 1 by vacuum coating, and a first insulating carbon black layer 6 can be arranged on the outer surface of the back electrode layer 5.

[0035] This embodiment takes cadmium telluride as an example of a back electrode layer, and its manufacturing process method is as follows: a transparent electrode layer 2 (TCO), an n-type buffer layer 3 (CdS) and a p-type light absorption layer 4 (CdTe) are sequentially plated on a glass substrate 1; a first laser-scribed groove P1 is laser-etched, and the first laser-scribed groove P1 is filled with photoresist insulation; a second laser-scribed groove p2 is laser-etched; a back electrode layer 5 (Al) is then plated on the outer surface of the p-type light absorption layer 4, and the second laser-scribed groove p2 is filled with the same material as the back electrode layer 5; a third laser-scribed groove p3 is laser-etched, and a fourth laser-scribed groove p4 is laser-etched for edge cleaning; the outer surface of the back electrode layer 5 is plated or coated with insulating carbon black, i.e., a first insulating carbon black layer, and the third laser-scribed groove p3 is filled with insulating carbon black, i.e., a second insulating carbon black layer, and an insulating carbon black layer is plated or coated in the fourth laser-scribed groove P4, i.e., a third insulating carbon black layer.

[0036] Among them, the first laser-scribed groove P1 penetrates the P-type light absorption layer 4, the N-type buffer layer 3 and the transparent electrode layer 2; the second laser-scribed groove p2 penetrates the P-type light absorption layer 4 and the N-type buffer layer 3; the third laser-scribed groove p3 penetrates the back electrode layer 5, the P-type light absorption layer 4 and the N-type buffer layer 3; the fourth laser-scribed groove p4 penetrates the back electrode layer 5, the P-type light absorption layer 4, the N-type buffer layer 3 and the transparent electrode layer 2.

[0037] Example 4

[0038] A photovoltaic glass, such as Figure 4As shown, it includes a glass substrate 1, on which a photovoltaic cell is arranged, and the photovoltaic cell includes a plurality of sub-cells 9 arranged in series, each of which includes a transparent electrode layer 2, an N-type buffer layer 3, a P-type light absorption layer 4 and a back electrode layer 5 arranged in layers, and each of which is arranged close to the glass substrate 1; a first insulating carbon black layer 6 is arranged on the outer surface of the back electrode layer 5 of each sub-cell 9. After cleaning the edges of the photovoltaic cell, a fourth laser-scribed groove P4 is obtained, and an insulating carbon black layer is filled in the fourth laser-scribed groove P4, which is a third insulating carbon black layer, and the third insulating carbon black layer is connected to the first insulating carbon black layer 6. For example, a photovoltaic cell can be arranged on the glass substrate 1 by vacuum coating, and a first insulating carbon black layer 6 can be arranged on the outer surface of the back electrode layer 5.

[0039] This embodiment takes the back electrode layer of cadmium telluride as an example, and its manufacturing process method is: a transparent electrode layer 2 (TCO), an n-type buffer layer 3 (CdS) and a p-type light absorption layer 4 (CdTe) are sequentially plated on a glass substrate 1; a first laser-scribed groove P1 is laser-etched, and the first laser-scribed groove P1 is filled with photoresist insulation; a second laser-scribed groove p2 is laser-etched; a back electrode layer 5Al is then plated on the outer surface of the P-type light absorption layer 4, and the second laser-scribed groove p2 is filled with the same material as the back electrode layer 5; a fourth laser-scribed groove p4 is laser-etched for edge cleaning; a first insulating carbon black layer 6 is then plated or coated on the outer surface of the back electrode layer 5, and an insulating carbon black layer is plated or coated inside the fourth laser-scribed groove P4; finally, a third laser-scribed groove p3 is laser-etched, and the first insulating carbon black layer 6 is divided into multiple parts.

[0040] Among them, the first laser-scribed groove P1 penetrates the P-type light absorption layer 4, the N-type buffer layer 3 and the transparent electrode layer 2; the second laser-scribed groove p2 penetrates the P-type light absorption layer 4 and the N-type buffer layer 3; the third laser-scribed groove p3 penetrates the first insulating carbon black layer, the back electrode layer 5, the P-type light absorption layer 4 and the N-type buffer layer 3; the fourth laser-scribed groove p4 penetrates the back electrode layer 5, the P-type light absorption layer 4, the N-type buffer layer 3 and the transparent electrode layer 2.

[0041] On the basis of the above-mentioned Embodiment 3 and Embodiment 4, two busbar slots 8 may be provided, and the method is as follows:

[0042] Setting method 1: a busbar groove 8 is set on the surface of the first insulating carbon black layer 6 on the first sub-cell and the nth sub-cell, or the busbar groove 8 is set through the first insulating carbon black layer 6. A busbar 7 for connecting to the back electrode layer is set in each busbar groove 8. The busbar 7 is a current guide strip, which includes a positive busbar and a negative busbar, similar to the wire of a circuit, which facilitates the current in and out of the photovoltaic cell.

[0043] Setting method two: one is located at the first insulating carbon black layer 6 on the first sub-cell and the third insulating carbon black layer adjacent thereto, and the other is located at the first insulating carbon black layer 6 on the nth sub-cell and the third insulating carbon black layer adjacent thereto; wherein the busbar groove 8 is located on the surface of the insulating carbon black layer, or is arranged through the insulating carbon black layer, and a busbar 7 for connecting to the back electrode layer is also arranged in each of the busbar grooves 8.

[0044] Example 5

[0045] like Figure 6 As shown, on the basis of Example 1, a plurality of fifth laser-scribed grooves P5 are arranged perpendicular to the glass substrate 1 and in parallel, and the plurality of fifth laser-scribed grooves P5 divide the photovoltaic cell into a plurality of sub-cell strings, and the fifth laser-scribed grooves P5 penetrate the first insulating carbon black layer 6, the back electrode layer 5, the P-type light absorption layer 4, the N-type buffer layer 3 and the transparent electrode layer 2. The fifth laser-scribed grooves P5 can make the photovoltaic cell partially transparent. This Example 5 does not include the third insulating carbon black layer, and two bus bar grooves 8 can be arranged on the basis thereof, which are respectively located on the surface of the first insulating carbon black layer 6 on the first sub-cell and the nth sub-cell, or are arranged through the first insulating carbon black layer, and a bus bar 7 for connecting to the back electrode layer is arranged in each of the bus bar grooves 8.

[0046] Example 6

[0047] Based on any one of Examples 2-4, a plurality of fifth laser-scribed grooves P5 can be arranged perpendicularly and parallel to the glass substrate 1, and the plurality of fifth laser-scribed grooves P5 divide the photovoltaic cell into a plurality of sub-cell strings. The fifth laser-scribed grooves P5 penetrate the first insulating carbon black layer 6, the back electrode layer 5, the P-type light absorption layer 4, the N-type buffer layer 3 and the transparent electrode layer 2, and finally a photovoltaic cell that can partially transmit light is obtained.

[0048] If this embodiment 6 does not include the third insulating carbon black layer, two bus bar grooves 8 can be set on the basis of embodiment 5, which are respectively located on the surface of the first insulating carbon black layer 6 on the 1st sub-cell and the nth sub-cell, or are set through the first insulating carbon black layer, and a bus bar 7 for connecting to the back electrode layer is set in each of the bus bar grooves 8.

[0049] If this embodiment 6 includes a third insulating carbon black layer, two bus bar grooves 8 are set, one is located at the first insulating carbon black layer 6 on the first sub-cell and the third insulating carbon black layer adjacent thereto, and the other is located at the first insulating carbon black layer 6 on the nth sub-cell and the third insulating carbon black layer adjacent thereto; wherein the bus bar groove 8 is located on the surface of the insulating carbon black layer, or is arranged through the first insulating carbon black layer, and a bus bar 7 for connecting to the back electrode layer is also arranged in each of the bus bar grooves 8.

[0050] The processing technology of the busbar 7 in any one of the above embodiments 1-6 can be but not limited to any one of the following methods:

[0051] Method 1: Before plating the first insulating carbon black layer 6 and / or the third insulating carbon black layer, the position where the busbar 7 is to be pasted is first blocked. After the insulating carbon black layer is plated, the blocking object is removed to reveal a groove, in which the busbar 7 is pasted.

[0052] Method 2: After plating the first insulating carbon black layer 6 and / or the third insulating carbon black layer, a groove is cut at the position where the bus bar 7 is to be attached, such as by using a laser etching method. The depth of the groove is at least enough to expose the back electrode layer. The bus bar 7 is then attached in the groove, and the bus bar 7 is electrically connected to the back electrode layer.

[0053] Method 3: After pasting the bus bar 7, the first insulating carbon black layer 6 and / or the third insulating carbon black layer are plated to cover the bus bar.

[0054] The utility model provides a method for using photovoltaic glass, which comprises: performing a first packaging on any one of the photovoltaic glasses in Examples 1-6 to obtain a photovoltaic glass assembly, which generally includes photovoltaic glass, a second glass, a hollow layer and a third glass; performing a second packaging on the photovoltaic glass assembly to obtain an independently usable photovoltaic assembly, which generally includes a photovoltaic glass assembly and a junction box assembly.

[0055] The bus bar 7 is connected to the junction box, and the wiring terminals of the junction box can be connected to the external photovoltaic cable to realize the external transmission of current. The current direction in the photovoltaic glass is: negative bus bar → the first sub-cell back electrode layer → the next sub-cell transparent electrode layer → the next sub-cell back electrode layer → ... → until the nth sub-cell back electrode layer → positive bus bar. The first sub-cell and the nth sub-cell mentioned above refer to the sub-cells to which the current enters and exits the photovoltaic cell, not the specific position of the sub-cell in the photovoltaic cell.

[0056] The photovoltaic module encapsulated by the photovoltaic glass of the utility model can be applied to photovoltaic curtain walls, photovoltaic windows and other places visible and touchable to indoor people. When indoor people look at the back side or indoor side of the photovoltaic module of this example, the insulating carbon black layer reduces the reflection of light, especially the mirror reflection, and therefore will not be affected by the glare of the back electrode metal.

Claims

1. A photovoltaic glass, characterized in that: The invention comprises a glass substrate (1), on which a photovoltaic cell is arranged, wherein the photovoltaic cell comprises n sub-cells (9) arranged in series, each of the sub-cells (9) comprising a transparent electrode layer (2), an N-type buffer layer (3), a P-type light absorption layer (4) and a back electrode layer (5) arranged in a stacked manner, and each of the transparent electrode layers (2) is arranged in close contact with the glass substrate (1); and a first insulating carbon black layer (6) is arranged on the outer surface of the back electrode layer (5) of each of the sub-cells (9).

2. A photovoltaic glass according to claim 1, characterized in that: The gap between adjacent sub-cells (9) is a third laser-scribed groove (P3), and an insulating carbon black layer is filled in each of the third laser-scribed grooves (P3), namely a second insulating carbon black layer, and each of the second insulating carbon black layers is connected to the first insulating carbon black layer.

3. A photovoltaic glass according to claim 1 or 2, characterized in that: After the edges of the photovoltaic cell are cleaned, a fourth laser-scribed groove (P4) is obtained, and an insulating carbon black layer is filled in the fourth laser-scribed groove (P4), namely a third insulating carbon black layer, and the third insulating carbon black layer is connected to the first insulating carbon black layer (6).

4. A photovoltaic glass according to claim 1 or 2, characterized in that: Two bus bar grooves (8) are provided, which are respectively located on the surface of the first insulating carbon black layer (6) on the first sub-cell and the nth sub-cell, or are provided through the first insulating carbon black layer (6), and a bus bar (7) for connecting to a back electrode layer is provided in each of the bus bar grooves (8).

5. The photovoltaic glass according to claim 3, characterized in that: Two bus bar grooves (8) are provided, which are respectively located on the surface of the first insulating carbon black layer (6) on the first sub-cell and the nth sub-cell, or are provided through the first insulating carbon black layer (6), and a bus bar (7) for connecting to a back electrode layer is provided in each of the bus bar grooves (8).

6. The photovoltaic glass according to claim 3, characterized in that: Two busbar grooves (8) are provided, one is located at the first insulating carbon black layer (6) and the third insulating carbon black layer on the first sub-cell, and the other is located at the first insulating carbon black layer (6) and the third insulating carbon black layer on the nth sub-cell; wherein the busbar groove (8) is located on the surface of the insulating carbon black layer, or is provided through the insulating carbon black layer, and a busbar (7) for connecting to a back electrode layer is also provided in each of the busbar grooves (8).

7. A photovoltaic glass according to claim 1 or 2, characterized in that: A plurality of fifth laser-scribed grooves (P5) are arranged perpendicular to and in parallel with the glass substrate (1), the plurality of fifth laser-scribed grooves (P5) divide the photovoltaic cell into a plurality of sub-cell strings, and the fifth laser-scribed grooves (P5) penetrate the first insulating carbon black layer (6), the back electrode layer (5), the P-type light absorption layer (4), the N-type buffer layer (3) and the transparent electrode layer (2).

8. The photovoltaic glass according to claim 3, characterized in that: A plurality of fifth laser-scribed grooves (P5) are arranged perpendicular to and in parallel with the glass substrate (1), the plurality of fifth laser-scribed grooves (P5) divide the photovoltaic cell into a plurality of sub-cell strings, and the fifth laser-scribed grooves (P5) penetrate the first insulating carbon black layer (6), the back electrode layer (5), the P-type light absorption layer (4), the N-type buffer layer (3) and the transparent electrode layer (2).

9. The photovoltaic glass according to claim 4, characterized in that: A plurality of fifth laser-scribed grooves (P5) are arranged perpendicular to and in parallel with the glass substrate (1), the plurality of fifth laser-scribed grooves (P5) divide the photovoltaic cell into a plurality of sub-cell strings, and the fifth laser-scribed grooves (P5) penetrate the first insulating carbon black layer (6), the back electrode layer (5), the P-type light absorption layer (4), the N-type buffer layer (3) and the transparent electrode layer (2).

10. The photovoltaic glass according to claim 5 or 6, characterized in that: A plurality of fifth laser-scribed grooves (P5) are arranged perpendicular to and in parallel with the glass substrate (1), the plurality of fifth laser-scribed grooves (P5) divide the photovoltaic cell into a plurality of sub-cell strings, and the fifth laser-scribed grooves (P5) penetrate the first insulating carbon black layer (6), the back electrode layer (5), the P-type light absorption layer (4), the N-type buffer layer (3) and the transparent electrode layer (2).

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