Translucent solar cell module and method for manufacturing the same

Abstract

To provide a transparent solar cell module with further improved output efficiency while enhancing solar transmittance and aesthetics, and a method for manufacturing the same.SOLUTION: The present invention relates to a transparent solar cell module and a method for manufacturing the same. The method for manufacturing the transparent solar cell module according to the present invention comprises the following steps: a first step of patterning a thin-film solar cell layer on a glass substrate to form a thin-film solar cell including a solar cell pattern, a second step of placing a transparent adhesive layer on the thin-film solar cell, a third step of bonding a cover glass substrate on the transparent adhesive layer. In the first step, the thin-film solar cell layer on the glass substrate is patterned by etching using a laser to form a thin-film solar cell including a solar cell pattern.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a transparent solar cell module and a method for manufacturing the same, and more particularly, to a transparent solar cell module in which the output efficiency is further improved while enhancing the sunlight transmittance and aesthetic properties, and a method for manufacturing the same.

Background Art

[0002] In recent years, the movements of countries around the world to address the climate crisis have accelerated, and declarations of carbon neutrality and policies for the widespread diffusion of new renewable energy have also accelerated. As a result, the need for solar cells is increasing day by day. In particular, interest in zero-energy buildings and the like has been growing, and the BIPV (Building Integrated PhotoVoltaics) market, which applies solar cells to buildings, is expanding.

[0003] In the solar cell market, silicon solar cells currently account for the majority. However, due to the characteristics of silicon, they are opaque and have poor aesthetic properties, so interest in new solar cells for BIPV (Building Integrated Photovoltaic) applications is increasing.

[0004] For these reasons, recently, although research on transparent solar cells has been actively conducted, solar cells having a transmittance of 50% or more exhibit an energy conversion efficiency of only about 5%.

[0005] Therefore, there is a need for a technology related to a solar cell module that has excellent aesthetic properties but is also capable of light transmission and can be applied to windows and the like.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] The present invention has been made in view of the aforementioned problems, and the object of the present invention is to provide a light-transmitting solar cell module and a method for manufacturing the same that further improves output efficiency while enhancing sunlight transmittance and aesthetics. [Means for solving the problem]

[0008] A method for manufacturing a translucent solar cell module according to one embodiment of the present invention, for solving the aforementioned problems, comprises: a first step of patterning a thin-film solar cell layer on a glass substrate to form a thin-film solar cell including a solar cell pattern; a second step of placing a transparent adhesive layer on the thin-film solar cell; and a third step of bonding a cover glass substrate on the transparent adhesive layer. In the first step, a thin-film solar cell layer on the glass substrate is patterned by etching using a laser to form a thin-film solar cell including a solar cell pattern.

[0009] According to another embodiment of the present invention, in the first step, the thin-film solar cell is formed, which includes a line-type solar cell pattern arranged at regular intervals.

[0010] According to another embodiment of the present invention, in the first step, the thin-film solar cell is formed, which includes line-type solar cell patterns with a width of 0.1 mm to 10 mm arranged at intervals of 0.124 to 0.5 mm.

[0011] According to another embodiment of the present invention, the laser may be a nanolaser, a picolaser, or a femtolaser.

[0012] According to another embodiment of the present invention, the laser may be a UV (UltraViolet) laser with a wavelength of 532 nm or an IR (InfraRed) laser with a wavelength of 1032 nm.

[0013] According to another embodiment of the present invention, in the first step, the thin-film solar cell layer is patterned by laser etching on the surface on which the thin-film solar cell layer is formed on a glass substrate to form a thin-film solar cell including a solar cell pattern.

[0014] According to another embodiment of the present invention, in the first step, the thin-film solar cell layer is patterned by laser etching on the opposite side of the surface on which the thin-film solar cell layer is formed on the glass substrate, thereby forming a thin-film solar cell including a solar cell pattern.

[0015] According to another embodiment of the present invention, in the first step, each of the numerous quadrilaterals Tooru The thin-film solar cell is formed, which includes a solar cell pattern in which light-emitting parts and numerous square solar cell patterns are arranged in a checkerboard pattern in which they intersect sequentially.

[0016] According to another embodiment of the present invention, in the first step, the thin-film solar cell layer is patterned to form a pattern linking portion that connects a number of square solar cell patterns.

[0017] According to another embodiment of the present invention, in the first step, the pattern connecting portion is formed in the thin-film solar cell so as to interconnect the solar cell patterns which are arranged to intersect each other in one direction.

[0018] A translucent solar cell module according to one embodiment of the present invention comprises a thin-film solar cell including a solar cell pattern formed by patterning a thin-film solar cell layer on a glass substrate, a transparent adhesive layer disposed on the thin-film solar cell, and a cover glass substrate bonded to the transparent adhesive layer. The thin-film solar cell is formed to include a solar cell pattern by patterning the thin-film solar cell layer on the glass substrate by etching using a laser.

[0019] According to another embodiment of the present invention, the thin-film solar cell may be configured to include a line type solar cell pattern arranged at a certain interval.

[0020] According to another embodiment of the present invention, the thin-film solar cell includes a line type solar cell pattern having a width of 0.1 mm to 10 mm and arranged at an interval of 0.124 to 0.5 mm.

[0021] According to another embodiment of the present invention, the thin-film solar cell may be configured to be arranged in a checkered pattern in which a plurality of light portions of each square and a plurality of solar cell patterns of each square intersect sequentially. Tooru The thin-film solar cell may be configured to be arranged in a checkered pattern in which a plurality of light portions of each square and a plurality of solar cell patterns of each square intersect sequentially.

[0022] According to another embodiment of the present invention, the thin-film solar cell further includes a pattern connecting portion formed by patterning the thin-film solar cell layer so as to connect a plurality of solar cell patterns of each square.

[0023] According to another embodiment of the present invention, the pattern connecting portion can interconnect the solar cell patterns arranged to intersect each other in one direction in the thin-film solar cell.

[0024] According to another embodiment of the present invention, each of the solar cell patterns is composed of a plurality of solar cells, and the width A of the pattern connecting portion may be formed equal to or larger than the width B of the solar cell.

Advantages of the Invention

[0025] According to the present invention, there is provided a light-transmissive solar cell module that further improves the output efficiency while enhancing the sunlight transmittance and aesthetic property, and a method for manufacturing the same.

Brief Description of the Drawings

[0026] [Figure 1] It is a front view of a light-transmissive solar cell module according to an embodiment of the present invention. [Figure 2]This is an exploded perspective view of a translucent solar cell module according to one embodiment of the present invention. [Figure 3] This is a front view of a light-transmitting solar cell module according to another embodiment of the present invention. [Figure 4] This is an exploded perspective view of a translucent solar cell module according to one embodiment of the present invention. [Figure 5] This is a diagram illustrating the solar cell pattern of a translucent solar cell module according to one embodiment of the present invention. [Figure 6] This diagram illustrates the case where the width of the connecting portion in the solar cell pattern of a translucent solar cell module is smaller than the width of the solar cell. [Figure 7] This is a flowchart illustrating a method for manufacturing a translucent solar cell module according to one embodiment of the present invention. [Figure 8] This diagram provides a more detailed explanation of the manufacturing method for a translucent solar cell module according to one embodiment of the present invention. [Figure 9] This table compares the differences in pattern width and spacing of translucent solar cell modules according to one embodiment of the present invention. [Figure 10] This diagram provides a more detailed explanation of the manufacturing method for a translucent solar cell module according to one embodiment of the present invention. [Figure 11] This figure provides a more detailed explanation of a method for manufacturing a light-transmitting solar cell module according to another embodiment of the present invention. [Modes for carrying out the invention]

[0027] The present invention can be subjected to a variety of transformations and may have many embodiments, but specific embodiments are shown in the drawings and described in detail in the detailed description section of the invention. However, this should be understood not as limiting the present invention to specific embodiments, but as including all transformations, equivalents, or substitutes that fall within the technical idea and technical scope of the present invention.

[0028] However, in describing embodiments, if it is determined that a specific description of a related known function or configuration would unnecessarily obscure the gist of the present invention, such detailed description will be omitted. Furthermore, the sizes of each component in the drawings may be exaggerated for illustrative purposes and do not represent the actual sizes applied.

[0029] Furthermore, when a component is referred to as being "linked" or "connected" to another component throughout the specification, it should be understood that the component may be directly linked or connected to the other component, but unless otherwise clearly indicated, it may also be linked or connected through another component in between. Moreover, when a part of the specification says that it "includes" a component, this does not mean that other components are excluded, but rather that other components may be included, unless otherwise indicated.

[0030] Figure 1 is a front view of a translucent solar cell module according to one embodiment of the present invention, and Figure 2 is an exploded perspective view of the translucent solar cell module according to one embodiment of the present invention.

[0031] The configuration of a translucent solar cell module according to one embodiment of the present invention will be described below with reference to Figures 1 and 2.

[0032] A translucent solar cell module 100 according to one embodiment of the present invention includes a thin-film solar cell 110, a transparent adhesive layer 120, and a cover glass substrate 130.

[0033] The thin-film solar cell 110 is composed of a number of solar cell patterns 111, and the solar cell patterns 111 are formed by patterning a thin-film solar cell layer on a glass substrate 113. The thin-film solar cell layer and the solar cell patterns 111 may be composed of CIGS (Cell-In-Glass Electron Spectroscopy).

[0034] More specifically, when forming the solar cell pattern 111, the thin-film solar cell layer 112 on the glass substrate is patterned using a laser.

[0035] In this case, according to another embodiment, a shielding portion can be formed on the thin-film solar cell layer on the glass substrate 113 using a mask, and the solar cell pattern 111 can be formed by patterning using a bead blast or sanding device.

[0036] Alternatively, the transparent adhesive layer 120 may be placed on the thin-film solar cell 110, a cover glass substrate 130 may be bonded to the thin-film solar cell 110, and the transparent adhesive layer 120 may be made of EVA film.

[0037] In this configuration, the thin-film solar cell 110 is configured to include line-type solar cell patterns 111 arranged at regular intervals.

[0038] The line-type solar cell pattern 111 is formed by patterning the unit cells of the thin-film solar cell layer on the glass substrate 130 by laser etching in the lateral direction.

[0039] More specifically, the thin-film solar cell 110 may be configured such that line-type solar cell patterns 111 with a width of 0.1 mm to 10 mm are arranged at intervals of 0.124 to 0.5 mm.

[0040] Furthermore, the pattern connecting portion 112 is formed by patterning the thin-film solar cell layer in the same manner as the solar cell pattern 111.

[0041] In this case, the pattern connecting portion 112 may be formed to connect a plurality of square solar cell patterns 111 arranged in one direction in the thin-film solar cell.

[0042] Figure 3 is a front view of a translucent solar cell module according to another embodiment of the present invention, and Figure 4 is an exploded perspective view of a translucent solar cell module according to one embodiment of the present invention.

[0043] Figures 5 and 6 are diagrams illustrating the solar cell pattern of a translucent solar cell module according to one embodiment of the present invention.

[0044] The configuration of a floodlight-type solar cell module according to one embodiment of the present invention will be described below with reference to Figures 4 to 6.

[0045] A translucent solar cell module 100 according to one embodiment of the present invention includes a thin-film solar cell 110, a transparent adhesive layer 120, and a cover glass substrate 130.

[0046] The thin-film solar cell 110 is composed of a number of solar cell patterns 111, and the solar cell patterns 111 are formed by patterning a thin-film solar cell layer on a glass substrate 113. The thin-film solar cell layer and the solar cell patterns 111 may be composed of CIGS (Cell-In-Glass Electron Spectroscopy).

[0047] More specifically, when forming the solar cell pattern 111, the thin-film solar cell layer on the glass substrate 112 can be patterned using a laser, or a shielding portion can be formed on the thin-film solar cell layer on the glass substrate 113 using a mask and then patterned using a bead blast or sanding device to form the solar cell pattern 111.

[0048] Furthermore, the transparent adhesive layer 120 is placed on the thin-film solar cell 110, the cover glass substrate 130 is bonded to the thin-film solar cell 110, and the transparent adhesive layer 120 is made of EVA film.

[0049] In this configuration, the thin-film solar cell 110 is arranged in a checkerboard pattern formed by the sequential intersection of numerous rectangular light-transmitting portions 115 and numerous rectangular solar cell patterns 111.

[0050] That is, as shown in the embodiments of Figures 1 and 2, the thin-film solar cell layer on the glass substrate 130 is patterned by laser etching in the lateral direction of the unit cells. After the line-type solar cell pattern 111 is formed, the checkerboard-shaped solar cell pattern 111 may be further patterned by laser etching in the lateral direction of the unit cells of the thin-film solar cell layer.

[0051] Referring to Figure 5, the pattern connecting portion 112 can be configured to connect a number of rectangular solar cell patterns 111. The pattern connecting portion 112 configured in this way is formed by patterning the thin-film solar cell layer, similar to the solar cell patterns 111.

[0052] In this case, the pattern connecting portion 112 may be formed to connect a plurality of square solar cell patterns 111 arranged in one direction in the thin-film solar cell.

[0053] More specifically, the solar cell patterns 111 are arranged so as to intersect each other in one direction, and the pattern connecting portion 112 is formed to interconnect the solar cell patterns 111.

[0054] With this configuration, the solar cell pattern 111 and the pattern connecting portion 112 are connected to each other via various paths, allowing current e to flow easily.

[0055] In this case, as shown in Figure 5, the solar cell pattern 111 is composed of a large number of solar cells (cell: C), and it is preferable that the width A of the pattern connecting portion 112 is configured to be the same as the width B of the solar cells C, or to be formed to be larger.

[0056] As shown in Figure 6, if the width A of the pattern connecting portion 112 is smaller than the width B of the solar cell C, it can become a factor that increases resistance and hinders the flow of current e. Therefore, according to one embodiment of the present invention, as shown in Figure 3, the width A of the pattern connecting portion 112 is made to be the same as or larger than the width B of the solar cell C so as not to hinder the flow of current e.

[0057] Figure 7 shows an embodiment of the present invention. Tooru This is a flowchart illustrating a method for manufacturing a photovoltaic solar cell module, and Figure 8 shows one embodiment of the present invention. Tooru This is a diagram illustrating the manufacturing method of a photovoltaic solar cell module in more detail.

[0058] Furthermore, Figures 9 and 10 are diagrams illustrating in more detail the method for manufacturing a translucent solar cell module according to one embodiment of the present invention, and Figure 11 is a diagram illustrating in more detail the method for manufacturing a translucent solar cell module according to another embodiment of the present invention.

[0059] The method for manufacturing a translucent solar cell module according to one embodiment of the present invention will be described in more detail below with reference to Figures 7 to 11.

[0060] First, a thin-film solar cell layer on the glass substrate 113 is patterned to form a thin-film solar cell 110 including a solar cell pattern 111 (S210). At this time, the thin-film solar cell layer on the glass substrate 130 can be patterned by laser etching to form a thin-film solar cell including a solar cell pattern 111.

[0061] More specifically, according to one embodiment of the present invention, a thin-film solar cell can be formed that includes line-type solar cell patterns 111 arranged at regular intervals. The line-type solar cell patterns 111 can be formed by patterning the unit cells of the thin-film solar cell layer on the glass substrate 130 by laser etching in the lateral direction.

[0062] In this case, the thin-film solar cell 110 may be configured such that line-type solar cell patterns 111 with a width of 0.1 mm to 10 mm are arranged at intervals of 0.124 mm to 0.5 mm.

[0063] Referring to Figure 9, when line-type solar cell patterns with a width of 1 mm are arranged at intervals of 0.5 mm, they show a light transmittance of 33% and an output efficiency of 8.1%. When line-type solar cell patterns with a width of 1 mm are arranged at intervals of 0.25 mm, they show a light transmittance of 20% and an output efficiency of 9.2%. When line-type solar cell patterns with a width of 1 mm are arranged at intervals of 0.125 mm, they show a light transmittance of 11% and an output efficiency of 10.8%.

[0064] Furthermore, Figure 10 shows an embodiment of the present invention. Tooru The output current and output voltage of the photovoltaic solar cell module are shown. Referring to Figure 10, it can be seen that as the spacing between solar cell patterns decreases sequentially from 0.5 mm, 0.25 mm, and 0.125 mm, the output current increases at the same output voltage. Therefore, it can be seen that the output efficiency increases as the spacing between solar cell patterns decreases.

[0065] On the other hand, according to another embodiment of the present invention, when a thin-film solar cell layer on a glass substrate 113 is patterned to form a thin-film solar cell 110 including a solar cell pattern 111, the thin-film solar cell 110 is formed such that a large number of rectangular light-transmitting portions 115 and a large number of rectangular solar cell patterns 111 are arranged in a sequentially intersecting checkerboard pattern.

[0066] More specifically, the line-type solar cell pattern can be formed by patterning the unit cells of the thin-film solar cell layer on the glass substrate 130 by laser etching in the lateral direction, and then the checkerboard-shaped solar cell pattern 111 can be formed by further patterning the unit cells of the thin-film solar cell layer by laser etching in the lateral direction.

[0067] At this time, the thin-film solar cell layer can be patterned to form a pattern connecting portion 112 that connects a number of square solar cell patterns 111. More specifically, the pattern connecting portion 112 can be formed on the thin-film solar cell 110 to interconnect the solar cell patterns 111 that are arranged to intersect each other in one direction.

[0068] On the other hand, when patterning such a thin-film solar cell layer, the thin-film solar cell layer on the glass substrate 113 can be patterned using a laser irradiated from a laser device L to form a solar cell pattern 111, or, as shown in Figure 11, a shielding portion can be formed using a mask of the thin-film solar cell layer on the glass substrate, and the solar cell pattern 111 can be formed by patterning using a bead blast or sanding device.

[0069] When patterning such a thin-film solar cell layer, the thin-film solar cell layer on the glass substrate 113 can be patterned by laser etching to form a thin-film solar cell including a solar cell pattern 111.

[0070] In this case, the laser may be a nanolaser, picosecond laser, or femtosecond laser. Alternatively, the laser may be a UV laser with a wavelength of 532 nm or an IR laser with a wavelength of 1032 nm.

[0071] When performing laser patterning, the solar cell pattern 111 can be formed by patterning the thin-film solar cell layer by laser etching on the opposite side of the glass substrate 113 from the side on which the thin-film solar cell layer is formed, or by patterning the thin-film solar cell layer by laser etching on the surface on which the thin-film solar cell layer is formed on the glass substrate 113.

[0072] Thereafter, terminals 101 are formed on the thin-film solar cell 110.

[0073] A transparent adhesive layer 120 is placed on the thin-film solar cell 110 formed in this manner (S220), and the solar cell module 100 is completed through a lamination process in which a cover glass substrate is bonded to the transparent adhesive layer 120 (S230).

[0074] Thus, the translucent solar cell module according to the present invention allows for electrical connection using the properties of the thin film itself without additional metal bonding by removing a portion of the thin film during the patterning of the thin film solar cell. This provides a solar cell module that is easy to work with, while possessing aesthetics, translucency, and all the functions of a solar cell.

[0075] The detailed description of the present invention above has described specific embodiments. However, various modifications are possible as long as they do not deviate from the scope of the present invention. The technical idea of ​​the present invention should not be limited to the embodiments described above, but should be defined not only by the claims but also by equivalent claims. [Explanation of Symbols]

[0076] 100: Floodlight type solar cell module 110: Thin-film solar cells 111: Solar cell pattern 112: Pattern connection section 113: Glass substrate 120: Transparent adhesive layer 130: Cover glass substrate

Claims

1. A thin-film solar cell including a solar cell pattern formed by patterning a thin-film solar cell layer on a glass substrate, A transparent adhesive layer disposed on the thin-film solar cell, The system comprises a cover glass substrate bonded to the transparent adhesive layer, The thin-film solar cell is formed by first patterning the thin-film solar cell layer on the glass substrate by laser etching to form a line-type solar cell pattern, and then patterning the thin-film solar cell layer to arrange the numerous rectangular translucent portions and the numerous rectangular solar cell patterns in a checkerboard pattern that intersect sequentially. A translucent solar cell module characterized by having a pattern connecting portion formed to connect a large number of the aforementioned rectangular solar cell patterns to one another.

2. The translucent solar cell module according to claim 1, characterized in that each of the aforementioned rectangular solar cell patterns has a number of solar cells with a width of 0.1 mm to 10 mm arranged at intervals of 0.124 mm to 0.5 mm.

3. The light-transmitting solar cell module according to claim 1, characterized in that the pattern connecting portion electrically connects adjacent solar cell patterns in the diagonal direction of the checkerboard-shaped solar cell pattern.

4. The translucent solar cell module according to claim 2, characterized in that the width A of the pattern connecting portion is the same as or larger than the width B of the solar cell.

5. The first step involves patterning a thin-film solar cell layer on a glass substrate using laser etching to form a thin-film solar cell including a solar cell pattern, The second step involves placing a transparent adhesive layer on the thin-film solar cell, The third step involves bonding a cover glass substrate onto the transparent adhesive layer, A method for manufacturing a translucent solar cell module, characterized in that, in the first step, the thin-film solar cell layer on the glass substrate is patterned by etching with a laser to form a line-type solar cell pattern, and then the thin-film solar cell layer is patterned to arrange a checkerboard pattern in which a large number of translucent squares and a large number of translucent squares of the solar cell pattern intersect sequentially, and at that time, pattern connecting parts are formed to connect the large number of translucent squares of the solar cell pattern to each other.

6. The method for manufacturing a translucent solar cell module according to claim 5, characterized in that the first step involves forming line-type solar cell patterns with a width of 0.1 mm to 10 mm, which are arranged at intervals of 0.124 mm to 0.5 mm.

7. The method for manufacturing a light-transmitting solar cell module according to claim 5, characterized in that the laser is a nanolaser, a picolaser, or a femtolaser.

8. The method for manufacturing a translucent solar cell module according to claim 5, characterized in that the laser is a UV laser with a wavelength of 532 nm or an IR laser with a wavelength of 1032 nm.

9. The method for manufacturing a translucent solar cell module according to claim 5, characterized in that the first step involves patterning the thin-film solar cell layer on the glass substrate on or on the opposite side of the surface where the thin-film solar cell layer is formed by etching with a laser, thereby forming a thin-film solar cell including a solar cell pattern.

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