KR20190032584A - Solar cell module - Google Patents

Abstract

The present invention relates to a solar cell module capable of forming a solar cell module using a plurality of divided cells and electrically connecting neighboring divided cells by using a metallic wire to increase a light receiving area and reduce electrical resistance A solar cell module according to the present invention includes a plurality of divided cells arranged adjacent to each other and including a first divided cell and a second divided cell; And a plurality of metallic wires electrically connecting a front electrode of the first divided cell and a rear electrode of the second divided cell, wherein the divided cell is divided into a plurality of divided unit cells, And is divided.

Description

Solar cell module

The present invention relates to a solar cell module, and more particularly, to a solar cell module using a plurality of divided cells and electrically connecting adjoining divided cells using a metallic wire, To a solar cell module capable of reducing resistance.

The solar cell module is composed of a plurality of solar cells and receives sunlight to perform photoelectric conversion. Each solar cell constituting the solar cell module may be a diode composed of a p-n junction.

When the solar light is converted into electricity by the solar cell, when sunlight is incident on the pn junction of the solar cell, an electron-hole pair is generated, and the electric field moves the electrons to the n layer and the holes to the p layer Photovoltaic power is generated between the pn junctions, and when both ends of the solar cell are connected to each other, a current flows and the power can be produced. The front and rear surfaces of the solar cell are provided with a front electrode and a rear electrode for collecting electrons and holes from the inside of the substrate.

The plurality of solar cells constituting the solar cell module are electrically connected to each other. For example, the front electrode of the first solar cell is connected to the rear electrode of the second solar cell. At this time, the front electrode and the rear electrode of the neighboring solar cell are connected by a ribbon-shaped interconnector (see Korean Patent No. 1138174).

1A and 1B, a front electrode and a rear electrode of a neighboring solar cell 110 are connected to each other by an interconnector 120. The front electrode and the rear electrode include a bus bar electrode 111 in detail And the interconnector 120 connects the bus bar electrode 111 of the front electrode and the bus bar electrode 111 of the rear electrode. The bus bar electrode transfers the collected carriers from the front electrode and the finger electrode of the rear electrode to the interconnector.

As described above, the structure of the solar cell module has been outlined, but the interconnector is indispensably required for the electrical connection of the solar cells as described above. On the other hand, one of the conditions for increasing the photoelectric conversion efficiency of the solar cell is the increase of the light receiving area. However, there is a problem that the ribbon-shaped interconnector occupies a considerable area, thereby reducing the light receiving area.

Korean Patent No. 1138174

SUMMARY OF THE INVENTION The present invention has been conceived to solve the above-mentioned problems, and it is an object of the present invention to provide a solar cell module using a plurality of divided cells, and to electrically connect neighboring divided cells by using metallic wires, And it is an object of the present invention to provide a solar cell module capable of reducing electrical resistance.

According to an aspect of the present invention, there is provided a solar cell module comprising: a plurality of divided cells arranged adjacent to each other and including a first divided cell and a second divided cell; And a plurality of metallic wires electrically connecting a front electrode of the first divided cell and a rear electrode of the second divided cell, wherein the divided cell is divided into a plurality of divided unit cells, And is divided.

Each of the front electrode and the rear electrode includes a plurality of collecting electrodes spaced apart in parallel, and the metallic wire is connected to the plurality of collecting electrodes in an intersecting manner.

Each of the front electrode and the rear electrode includes a plurality of collecting electrodes spaced apart from each other in parallel. The conductive pad is provided in a region where the metallic wire is disposed, and the plurality of conductive pads are electrically connected to the metallic wire.

The front electrode and the rear electrode each have a plurality of collecting electrodes spaced apart in parallel and have a bus bar electrode crossing the plurality of collecting electrodes, and the bus bar electrode is electrically connected to the metallic wire .

Wherein the front electrode and the rear electrode each have a plurality of collecting electrodes spaced apart in parallel and have bus bar electrodes crossing the plurality of collecting electrodes, conductive pads on the bus bar electrodes, Is electrically connected to the metallic wire.

Each of the front electrode and the rear electrode includes a plurality of collecting electrodes spaced apart from each other in parallel. A conductive pad is provided in a region where the metallic wire is disposed, and a bus bar electrode is provided between the conductive pad and the conductive pad. , And the plurality of conductive pads are electrically connected to the metallic wire.

The number of the metallic wires is 6 to 13, and most preferably 6 to 10. In addition, the diameter of the metallic wire is 120 to 370 탆, and most preferably 120 to 240 탆.

The area of the front conductive pad disposed at the outermost side or the area of the rear conductive pad may be larger than the area of the front conductive pad disposed inside or the area of the rear conductive pad.

Also, the number of the front conductive pads may be the same as the number of the rear conductive pads, or the number of the back conductive pads may be larger than the number of the front conductive pads.

The plurality of front conductive pads and the plurality of rear conductive pads are spaced apart at equal intervals, and the interval between the front conductive pads or the rear conductive pads is 15 mm or less.

The outermost conductive pad or the rear conductive pad may be disposed at a distance of 2.5 mm or more from the end of the solar cell substrate.

The solar cell is a double-sided light receiving solar cell, which is a front-junction type double-sided light receiving solar cell in which an emitter layer is disposed on a front surface of a substrate and a rear surface layer is provided on a rear surface of the substrate. In addition, the solar cell is a double-sided light receiving solar cell, and the emitter layer is located on the rear surface of the substrate, and the front surface layer is disposed on the front surface of the substrate. In addition, the solar cell is a front light receiving solar cell.

The area of the front conductive pad disposed at the outermost side or the area of the rear conductive pad is 4 to 8 times larger than the area of the front conductive pad disposed inside or the area of the rear conductive pad.

The solar cell module according to the present invention has the following effects.

The number of the metallic wires can be increased more than the number of the ribbon interconnectors by improving the electrical characteristics of the solar cell module, The light receiving area can be increased by applying a narrower metallic wire.

In addition, since the solar cell module is constructed by disposing the divided cells divided into the unit cells, the electrical resistance in the divided cells is reduced and the number or diameter of the metallic wires can be reduced. Thus, The light receiving area of the divided cells can be increased and the material consumed in forming the metallic wire can be saved.

In addition, by optimizing the number, area, and position of the conductive pads, it is possible to improve the adhesion characteristics between the metallic wires and the conductive pads and the bowing characteristics of the solar cell.

1A and 1B are schematic diagrams of a solar cell module according to the related art.
2 is a reference diagram showing a unit cell and a divided cell.
3 is a perspective view of a solar cell module according to an embodiment of the present invention.
4 is an experimental result showing the deflection of the solar cell substrate according to the difference in the number of the front conductive pads and the rear conductive pads.
Fig. 5 shows experimental results of module output according to the number of metallic wires. Fig.
6 is a graph showing an experimental result of module output according to the number of metallic wires in a normal cell (non-divided cell).
7 is a photograph showing an actual manufacturing state of a unit cell according to the present invention.
8 is a photograph showing the outermost conductive pad.

The present invention proposes a technology for replacing a ribbon-shaped inter-connector (hereinafter, referred to as a ribbon inter-connector) with a metallic wire in constructing a solar cell module by applying divided cells and forming a solar cell module.

In the present invention, the term "divided cell" refers to a plurality of solar cells (hereinafter referred to as "unit cells"). A typical solar cell, that is, a typical unit cell, means a solar cell having a pn junction structure and an electrode structure completed by applying a solar cell process to a silicon substrate having a size of about 6 inches (about 156 mm x 156 mm) The 'divided cell' of the present invention means a cell obtained by dividing such a unit cell into a plurality of equal parts. The unit cell may be a silicon substrate having a width of 5 to 8 inches, in addition to a silicon substrate having a width of 6 inches. Also, in the present invention, 'divided cell' may mean a solar cell having an area corresponding to a cell divided from the above-mentioned unit cell. In this case, 'divided cell' means a solar cell completed by applying a solar cell process on a silicon substrate having an area corresponding to a cell divided from a unit cell.

Since the divided cell of the present invention is a cell in which the solar cell fabrication process is completed, the divided cells have a completed p-n junction structure and an electrode structure similar to the unit cells.

The present invention discloses a technique for constructing a solar cell module using a plurality of divided cells as described above and replacing the ribbon interconnection in constructing a solar cell module. As described in the Background of the Invention, the ribbon-shaped interconnector electrically connects the bus bar electrodes of each unit cell. The present invention replaces the ribbon inter connector connection method through the metallic wire connection method.

The metallic wire electrically connects neighboring divided cells. For example, the metallic wire electrically connects the front electrode of the first subcell and the back electrode of the second subcell. Each of the front electrode and the rear electrode electrically connected to the metallic wire means a collecting electrode or a combination of a collecting electrode and a conductive pad, a combination of a collecting electrode and a bus bar electrode, a combination of a collecting electrode and a bus bar electrode, . ≪ / RTI >

In the case where the front electrode and the rear electrode are each composed of only the collecting electrode, the metallic wire is connected to the plurality of collecting electrodes so as to intersect with each other.

In the case of a combination of the collecting electrode and the conductive pad, a conductive pad is provided in a region where the metallic wire is disposed, and a plurality of conductive pads are electrically connected to the metallic wire. In this case, it is preferable that a conductive pad is provided on each collecting electrode.

In the case of a combination of the collecting electrode and the bus bar electrode, the bus bar electrode is disposed on the plurality of collecting electrodes in an intersecting manner, and the bus bar electrode is electrically connected to the metallic wire.

In the case of a combination of the collecting electrode, the bus bar electrode, and the conductive pad, the bus bar electrode may be arranged to cross the plurality of collecting electrodes, and the conductive pad may be provided on the bus bar electrode. In addition, a structure in which a conductive pad is provided in a region where the metallic wire is disposed and a bus bar electrode is provided in between the conductive pad and the conductive pad is also possible.

In the case of the ribbon interconnection method, two to four bus bar electrodes are provided on the front and back sides of the unit cell, and the same number of inter connectors as the bus bar electrodes are applied. On the other hand, in the case of the present invention, a metallic wire having a width smaller than the width of the ribbon interconnect is applied. Because the width of the metallic wire is less than the width of the ribbon interconnect, the number of metallic wires can be increased beyond the number of conventional ribbon interconnects at a level that minimizes the reduction of the light receiving area, The electrical connection characteristics between the divided cells can be improved.

In addition, since the divided cells having a smaller area than the unit cells are applied, the electrical resistance in the process of moving the carriers in the metallic wires of the divided cells is reduced, and thus the space for reducing the number or diameter of the metallic wires It grows. Reducing the number or diameter of the metallic wires means that it is possible to reduce the material required for metallic wire formation and to minimize the reduction of the light receiving area.

In addition, in the process of adhering tabbing between a metallic wire and an electrode (a front electrode or a rear electrode of a divided cell), adhesion characteristics between the metallic wire and the electrode and bowing characteristics of the solar cell In addition to the above.

The number of conductive pads disposed on the rear surface may be the same as that of the front surface or the number of conductive pads on the front surface may be designed in consideration of the fact that the heat transfer efficiency of the rear surface is relatively lower than that of the solar cell front due to the nature of the tabletting device. This makes it possible to improve the adhesion characteristics between the metallic wire and the electrode and the warping characteristics of the solar cell. If the number of conductive pads on the front surface and the back surface are different from each other, warping may occur.

A technique for designing the area of the conductive pad disposed at the outermost side to be larger than the area of another conductive pad (conductive pad disposed on the inner side) is proposed as an additional method for improving the adhesion property between the metallic wire and the conductive pad. In addition, a technique of lowering the possibility of cracking of the substrate by arranging the conductive pad disposed at the outermost position at a distance of 2.5 mm or more from the end of the solar cell substrate is proposed.

Hereinafter, a solar cell module and a manufacturing method thereof according to an embodiment of the present invention will be described in detail with reference to the drawings.

2 and 3, a solar cell module according to an embodiment of the present invention includes a plurality of divided cells 200, and a plurality of divided cells 200 are electrically connected to each other by a metallic wire 10 do.

The unit cell 100 is divided into a plurality of equal parts equal to or more than a half of the unit cell 100. The unit cell 100 is fabricated on a silicon substrate having a width of 6 inches (about 156 mm x 156 mm) And is provided with a pn junction structure and an electrode structure. The unit cell 100 may be a silicon substrate having a width of 5 to 8 inches, in addition to a silicon substrate having a width of 6 inches (about 156 mm x 156 mm).

Each of the divided cells 200 includes a semiconductor substrate 201 including a p-n junction. Collecting electrodes are provided on the front and rear surfaces of the substrate 201, respectively. The collecting electrode 211 provided on the front surface of the substrate 201 collects the electrons generated by the photoelectric conversion and the collecting electrode (not shown) provided on the rear surface of the substrate 201 collects the holes generated by the photoelectric conversion And its role may be reversed. The solar cell is divided into a front electrode type and a rear electrode type according to the arrangement of the electrodes, and is divided into a front light receiving type and a double-side light receiving type according to a light receiving form of solar light. 100) is not limited in its form, provided that it includes a pn junction enabling photoelectric conversion. For reference, in the case of constructing the front light receiving type solar cell, the collecting electrode provided on the back surface of the substrate may be formed like a plate like an Al electrode inducing formation of a back surface field. In the following description, the solar cell 10 including the collecting electrode 211 having the same shape as the front surface and the rear surface of the substrate 201 will be described for convenience of explanation.

A plurality of the collecting electrodes are provided on the front surface or the rear surface of the substrate 201, and the plurality of collecting electrodes 211 are arranged in parallel to each other.

A plurality of conductive pads 212 are disposed on the substrate 201 so as to be spaced apart from each other in a direction crossing the collecting electrodes 211. Each of the conductive pads 212 is connected to the collecting electrode 211 at a position where the conductive pads 212 are disposed and the arrangement direction of the columns formed by the plurality of conductive pads 212 is determined by the direction in which the metallic wire 10 same.

The metallic wires 10 are disposed on the conductive pads 212 and the arrangement direction of the metallic wires 10 is the same as the arrangement direction of the columns formed by the plurality of conductive pads 212, As shown in Fig.

The conductive pad 212 serves to transfer the electrons or holes collected by the collecting electrode 211 to the metallic wire 10 and the metallic wire 10 is connected to the carrier collected by the collecting electrode 211 To the external system or the power storage device through the conductive pad 212.

In another embodiment, a bus bar electrode 213 may be further provided as shown in FIG. In this case, a bus bar electrode 213 is provided in a direction intersecting the plurality of collecting electrodes 211, and a conductive pad (not shown) is formed on the bus bar electrode at a point where the bus bar electrode 213 and the collecting electrode 211 cross each other 212 may be provided. In another embodiment, a bus bar electrode may be provided between the conductive pad 212 and the conductive pad 212 to connect the collecting electrode 211 and the bus bar electrode to the conductive pad 212. The metal wire 10 is connected to the conductive pad 212 in the above embodiment.

In the above embodiments, the front electrode and the rear electrode of the divided cells are each a combination of a collecting electrode and a conductive pad, or a combination of a collecting electrode, a bus bar electrode and a conductive pad. However, in another embodiment, . If the conductive pad is omitted, the front electrode and the rear electrode of the divided cells may each be composed of only the collecting electrode or a combination of the collecting electrode and the bus bar electrode. In the case of only the collecting electrode, the metallic wire is connected in a form crossing the plurality of collecting electrodes. Further, in the case of a combination of the collecting electrode and the bus bar electrode, the bus bar electrode is disposed on the plurality of collecting electrodes so as to cross each other, and the bus bar electrode is electrically connected to the metallic wire.

The spacing between the conductive pads 212 is not limited, but may vary depending on the attachment characteristics of the metallic wires 10 and the conductive pads 212, the reduction of the light receiving area, the use amount of the conductive material (for example, Ag) And 15 mm in consideration of electrical characteristics. The collector electrode 211 and the conductive pad 212 may be made of Ag as a main component and the metallic wire 10 may be made of copper and Sn based metal compounds.

The area of the outermost conductive pad (hereinafter referred to as the outermost conductive pad) is designed to be larger than the area of the conductive pad disposed on the inner side as shown in Fig. 8 . Uniform heat is supplied to the conductive pads on the inner side during the tabletting process, so that the adhesion characteristics between the metal wires 10 and the conductive pads are good. However, since the outermost conductive pads are positioned at the edges of the cells, 10, and in order to compensate for this, it is necessary to design the area of the outermost conductive pad to be larger than the area of the inner conductive pad. The area of the outermost conductive pad may be designed to be 4 to 8 times the area of the inner conductive pad in order to improve the adhesion property of the metallic wire 10 and the outermost conductive pad, The length can be designed to be 4 to 8 times.

In order to prevent cracking of the divided cell 200, it is preferable that the outermost conductive pad is disposed at a distance of 2.5 mm or more from the end of the divided cell 200. As the position of the outermost conductive pad is closer to the end of the substrate 201, the output of the divided cell 200 is improved, but the angle of bending of the metallic wire is increased, and the possibility of cracking at the substrate edge is increased. In the case of applying the conventional ribbon-shaped interconnector, one end of the bus bar electrode is disposed at a distance of 6 mm or more from the end of the substrate. However, when the metallic wire of the present invention is applied, the outermost conductive pad is bent It can be provided at a close position. In consideration of this, it is preferable that the outermost conductive pad is disposed at a distance of 2.5 to 6 mm from the end of the divided cell 200.

The number of conductive pads on the front surface of the substrate 201 and the number of conductive pads on the back surface of the substrate 201 are preferably designed to be the same. The reason for designing the same number of the front conductive pads and the rear conductive pads is to prevent warping of the divided cells 200. When the number of conductive pads on the front surface and the back surface of the substrate is different, a warp phenomenon of the solar cell substrate occurs due to the difference in the application amount of the conductive material forming the front and rear conductive pads. FIG. 4 shows the amount of deflection of the solar cell substrate due to the difference in the number of the front conductive pads and the rear conductive pads. As shown in FIG. 4, as the number of the front conductive pads and the rear conductive pads increases, . It is most preferable that the total number of the front conductive pads and the rear conductive pads are equal to each other to minimize the amount of deflection of the substrate. However, since the heat source of the tabbing device in the normal structure is located on the front side of the solar cell, There is a problem that heat transfer efficiency is lowered. In this case, the number of rear conductive pads may be larger than that of the front conductive pads.

The metal wire 10 connects the front electrode and the rear electrode of the neighboring divided cells 200 in a state where the front electrode and the rear electrode of each divided cell 200 have the structure as described above. In one embodiment, when the first divided cell 200 and the second divided cell 200 are disposed, the metallic wire 10 is electrically connected to the front electrode of the first divided cell 200 and the second divided cell 200 (Or the rear electrode of the first divided cell 200 and the front electrode of the second divided cell 200 are connected by the metallic wire 10).

Specifically, the metallic wire 10 disposed on the conductive pad 212 on the front surface of the first divided cell 200 is extended to be disposed on the conductive pad (not shown) on the rear surface of the second divided cell 200 Respectively. The number of the metallic wires 10 connecting the front electrode of the first divided cell 200 and the rear electrode of the second divided cell 200 is not limited but may be 6 to 13, 10 < / RTI > When the number of metallic wires increases, the electrical resistance decreases but the light receiving area also decreases. When the number of metallic wires decreases, the light receiving area increases, but the electrical resistance also increases. As a result of evaluating the module output according to the number of metallic wires, it was found that the configuration of 8 to 9 metal wires showing the maximum module output value is most preferable at a diameter of 360 mu m of the metallic wire as shown in Fig. 5 .

On the other hand, in the case of a non-divided normal cell (about 156 mm x 156 mm), it is necessary to apply twelve metallic wires for optimum module output when a metallic wire having a diameter of 360 μm is applied. have.

If the normal cell is divided into two divided cells, the cell area is reduced to half, and the number of metallic wires can be reduced from 12 to 6 as the generated current amount of each divided cell is reduced to half of the normal cell. However, if the number of metallic wires is reduced in correspondence with the reduction of the cell area due to the division and the reduction of the generated current, the electrical characteristics of the divided cells deteriorate as compared with the normal cells. This is because the electrical resistance in the emitter is increased if the number of metallic wires is reduced in response to the cell area decrease. Therefore, it is necessary to consider the increase of the electrical resistance of the emitter when designing the reduction of the number of metallic wires due to cell division.

Considering this point, when the normal cells are divided into n pieces (n is a natural number of 2 or more), the optimal number (y) of the metallic wires applied to each of the divided cells divided into n pieces is (1 / n + 1 / 3n ) x? y? (1 / n + 1 / 2n) x. Where x is the optimal number of metallic wires applied to the normal cell and y is the optimal number of metallic wires applied to the divided cells. On the basis of this, when the normal cell is divided into two divided cells, the optimal number (y) of the metallic wires applied to the divided cells is (1/2 + 1/6) x? Y? ) x, it can be seen that it is 8 ~ 9.

In this case, the diameter of the metallic wire may be designed to be 120-370 탆, and most preferably 120-240 탆. In addition, from the experimental results of FIG. 5, it can be confirmed that the output of the solar cell module is improved when the metallic wires are combined with the divided cells in contrast to the combination of the conventional solar cell and the ribbon.

As the solar cell module is constructed using the divided cells 200 in which the unit cells 100 are divided, the moving distance of the carriers in the metallic wires of the divided cells 200 is shortened and the moving distance of the carriers is shortened. 200, and thus the diameter of the metallic wire can be reduced without deteriorating the electrical characteristics. As the diameter of the metallic wire can be reduced, the light receiving area of the divided cells 200 can be increased and the material consumed in forming the metallic wire can be saved.

By replacing the conventional ribbon interconnection connection method with the metallic wire connection method, the number of metallic wires can be increased more than the number of ribbon interconnectors, which can improve the electrical characteristics of the solar cell module, By applying a metallic wire, the light receiving area can be increased.

In addition, since the solar cell module is constructed by disposing the divided cells divided into the unit cells, the electrical resistance in the divided cells is reduced and the number or diameter of the metallic wires can be reduced. Thus, The light receiving area of the divided cells can be increased and the material consumed in forming the metallic wire can be saved.

In addition, by optimizing the number, area, and position of the conductive pads, it is possible to improve the adhesion characteristics between the metallic wires and the conductive pads and the bowing characteristics of the solar cell.

10: metallic wire 100: unit cell
200: solar cell 201: substrate
211: collecting electrode 212: conductive pad
222: rear conductive pad

Claims (20)

A plurality of divided cells arranged adjacent to each other and including a first divided cell and a second divided cell; And
And a plurality of metallic wires electrically connecting the front electrode of the first divided cell and the rear electrode of the second divided cell,
Wherein the divided cells are divided into a plurality of equally divided unit cells that are completed through the solar cell manufacturing process. The plasma display apparatus of claim 1, wherein the front electrode and the rear electrode are formed of a plurality of collecting electrodes spaced apart in parallel,
Wherein the metallic wire is connected to the plurality of collecting electrodes in an intersecting manner. The plasma display apparatus of claim 1, wherein the front electrode and the rear electrode each include a plurality of collecting electrodes spaced apart in parallel,
Wherein a conductive pad is provided in a region where the metallic wire is disposed, and a plurality of conductive pads are electrically connected to the metallic wire. The plasma display apparatus of claim 1, wherein the front electrode and the rear electrode each include a plurality of collecting electrodes spaced apart in parallel,
And a bus bar electrode crossing the plurality of collecting electrodes, wherein the bus bar electrode is electrically connected to the metallic wire. The plasma display apparatus of claim 1, wherein the front electrode and the rear electrode each include a plurality of collecting electrodes spaced apart in parallel,
And a bus bar electrode intersecting the plurality of collecting electrodes, wherein a conductive pad is provided on the bus bar electrode, and the plurality of conductive pads are electrically connected to the metallic wire. The plasma display apparatus of claim 1, wherein the front electrode and the rear electrode each include a plurality of collecting electrodes spaced apart in parallel,
Wherein a conductive pad is provided in a region where the metallic wire is disposed and a bus bar electrode is provided between the conductive pad and the conductive pad, and a plurality of conductive pads are electrically connected to the metallic wire. The solar cell module according to claim 1, wherein the number of the metallic wires is 6 to 13. The solar cell module according to claim 1, wherein the number of the metallic wires is 6 to 10. The solar cell module according to claim 1, wherein a diameter of the metallic wire is 120 to 370 μm. The solar cell module according to claim 1, wherein the diameter of the metallic wire is 120 to 240 占 퐉. 7. The semiconductor device according to any one of claims 3, 5 and 6, wherein the area of the front conductive pad or the area of the rear conductive pad disposed on the outermost side is the area of the front conductive pad disposed on the inner side or the area of the rear conductive pad Wherein the solar cell module is a solar cell module. The solar cell module according to any one of claims 3, 5, and 6, wherein the number of the front conductive pads is equal to the number of the back conductive pads. The solar cell module according to any one of claims 3, 5, and 6, wherein the number of rear conductive pads is larger than the number of front conductive pads. The solar cell module according to any one of claims 3, 5, and 6, wherein the plurality of conductive pads are spaced apart at equal intervals. The solar cell module according to any one of claims 3, 5, and 6, wherein a distance between the conductive pad and the conductive pad is 15 mm or less. The solar cell module according to any one of claims 3, 5, and 6, wherein the outermost surface conductive pad or the rear surface conductive pad is disposed at a distance of 2.5 mm or more from the end of the solar cell substrate . The solar cell module according to claim 1, wherein the solar cell is a double-sided light receiving solar cell, wherein the emitter layer is disposed on a front surface of the substrate and a rear front layer is provided on a rear surface of the substrate. . The solar cell module according to claim 1, wherein the solar cell is a double-sided light receiving solar cell, and the emitter layer is located on a rear surface of the substrate, and the front surface layer is disposed on a front surface of the substrate. The solar cell module according to claim 1, wherein the solar cell is a front light receiving solar cell. 7. The semiconductor device according to any one of claims 3, 5 and 6, wherein the area of the front conductive pad or the area of the rear conductive pad disposed on the outermost side is the area of the front conductive pad disposed on the inner side or the area of the rear conductive pad Wherein the solar cell module is a solar cell module.

Images