High-efficiency light-transmissive solar cell module and manufacturing method therefor

Abstract

The present invention relates to a light-transmissive solar cell module and a manufacturing method therefor. The manufacturing method for a high-efficiency light-transmissive solar cell module according to the present invention includes: a first step of forming a thin-film solar cell including solar cell patterns by patterning a thin-film solar cell layer on a glass substrate; a second step of arranging a transparent adhesive layer on the thin-film solar cell; and a third step of adhering a cover glass substrate to the transparent adhesive layer, wherein, in the first step, the thin-film solar cell layer on the glass substrate is patterned through etching using a laser to form the thin-film solar cell including the solar cell patterns.

Description

High-efficiency flood-type solar cell module and manufacturing method thereof

[0001] The present invention relates to a high-efficiency flood-type solar cell module and a method for manufacturing the same, and more particularly, to a high-efficiency flood-type solar cell module that further improves output efficiency while increasing sunlight transmittance and aesthetics, and a method for manufacturing the same.

[0002] With countries around the world accelerating their response to the climate crisis, including carbon neutrality declarations and policies promoting the expansion of renewable energy, the need for solar cells is growing day by day. In particular, growing interest in zero-energy buildings is fueling the expansion of the market for Building Integrated Photovoltaics (BIPV), which incorporates solar cells into buildings.

[0003] The solar cell market is currently dominated by silicon solar cells, but interest in new solar cells for BIPV applications is increasing due to the opacity and poor aesthetics of silicon.

[0004] For this reason, research on transparent solar cells has been actively conducted recently, but solar cells with a transmittance of more than 50% show an energy conversion efficiency of only about 5%.

[0005] Therefore, there is a need for technology for solar cell modules that are aesthetically pleasing and allow light transmission, making them suitable for use in windows and other applications.

[0006] The present invention has been devised to solve the aforementioned problems, and according to the present invention, it is intended to provide a high-efficiency light-transmitting solar cell module and a method for manufacturing the same, which further improves output efficiency while increasing sunlight transmittance and aesthetics.

[0007] A method for manufacturing a high-efficiency light-transmitting solar cell module according to an embodiment of the present invention for solving the above-described problem comprises: a first step of patterning a thin film solar cell layer on a glass substrate to form a thin film solar cell including solar cell patterns; a second step of disposing 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; wherein the first step forms a thin film solar cell including solar cell patterns by patterning the thin film solar cell layer on the glass substrate through etching using a laser.

[0008] According to another embodiment of the present invention, the first step can form the thin film solar cell including line type solar cell patterns arranged at regular intervals.

[0009] According to another embodiment of the present invention, the first step can form the thin film solar cell including line-shaped solar cell patterns having a width of 0.1 mm to 10 mm and arranged at intervals of 0.124 mm to 0.5 mm.

[0010] According to another embodiment of the present invention, the laser may be a nanolaser, a picolaser or a femtolaser.

[0011] According to another embodiment of the present invention, the laser may be a UV laser having a wavelength of 532 nm or an IR laser having a wavelength of 1032 nm.

[0012] According to another embodiment of the present invention, the first step may form a thin film solar cell including solar cell patterns by patterning the thin film solar cell layer through etching using a laser on the surface on which the thin film solar cell layer is formed on the glass substrate.

[0013] According to another embodiment of the present invention, the first step may form a thin film solar cell including solar cell patterns by patterning the thin film solar cell layer through etching using a laser on the opposite side of the surface on which the thin film solar cell layer is formed on the glass substrate.

[0014] A high-efficiency light-transmitting solar cell module according to one embodiment of the present invention comprises: a thin-film solar cell including solar cell patterns 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 adhered to the transparent adhesive layer; wherein the thin-film solar cell is formed to include solar cell patterns by patterning the thin-film solar cell layer on the glass substrate through etching using a laser.

[0015] According to another embodiment of the present invention, the thin film solar cell may be configured to include line type solar cell patterns arranged at regular intervals.

[0016] According to another embodiment of the present invention, the thin film solar cell is configured to include line-shaped solar cell patterns having a width of 0.1 mm to 10 mm and arranged at intervals of 0.124 mm to 0.5 mm.

[0017] According to the present invention, a high-efficiency light-transmitting solar cell module and a manufacturing method thereof can be provided that further improve output efficiency while increasing solar transmittance and aesthetics.

[0018] FIG. 1 is a front view of a high-efficiency light-transmitting solar cell module according to one embodiment of the present invention.

[0019] Figure 2 is an exploded perspective view of a high-efficiency light-transmitting solar cell module according to one embodiment of the present invention.

[0020] FIG. 3 is a flowchart illustrating a method for manufacturing a high-efficiency light-transmitting solar cell module according to one embodiment of the present invention.

[0021] FIG. 4 is a drawing for explaining in more detail a method for manufacturing a high-efficiency light-transmitting solar cell module according to one embodiment of the present invention.

[0022] FIG. 5 and FIG. 6 are drawings for explaining in more detail a method for manufacturing a high-efficiency light-transmitting solar cell module according to one embodiment of the present invention.

[0023] The present invention is susceptible to various modifications and embodiments. Specific embodiments are illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, but rather to encompass all modifications, equivalents, and alternatives falling within the spirit and technical scope of the present invention.

[0024] However, when describing embodiments, if a detailed description of a related known function or configuration is judged to unnecessarily obscure the gist of the present invention, a detailed description thereof will be omitted. Furthermore, the sizes of each component in the drawings may be exaggerated for illustrative purposes and do not necessarily represent the sizes actually applied.

[0025] Additionally, throughout the specification, when a component is referred to as being "connected" or "connected" to another component, it should be understood that the component may be directly connected or connected to the other component, but may also be connected or connected via another component in between, unless otherwise specifically stated. Additionally, throughout the specification, when it is said that a part "includes" a component, this does not exclude other components, but rather includes other components, unless otherwise specifically stated.

[0026] FIG. 1 is a front view of a high-efficiency light-transmitting solar cell module according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view of a high-efficiency light-transmitting solar cell module according to an embodiment of the present invention.

[0027] Hereinafter, the configuration of a high-efficiency light-transmitting solar cell module according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2.

[0028] A high-efficiency light-transmitting solar cell module (100) according to one embodiment of the present invention is configured to include a thin film solar cell (110), a transparent adhesive layer (120), and a cover glass substrate (130).

[0029] The above thin film solar cell (110) is configured to include a plurality of solar cell patterns (111), and the solar cell pattern (111) is formed by patterning a thin film solar cell layer on a glass substrate (113). The thin film solar cell layer and the solar cell pattern (111) may be configured as a CIGS thin film solar cell, an amorphous silicon thin film solar cell, a cadmium terephthalate (CdTe) thin film solar cell, or the like.

[0030] More specifically, when forming the solar cell patterns (111), a thin film solar cell layer on a glass substrate (130) is patterned using a laser.

[0031] In addition, the transparent adhesive layer (120) is disposed on the thin film solar cell (110) to adhere the cover glass substrate (130) to the thin film solar cell (110), and the transparent adhesive layer (120) may be composed of an EVA film.

[0032] At this time, the thin film solar cell (110) is configured to include line type solar cell patterns (111) arranged at regular intervals.

[0033] More specifically, the thin film solar cell (110) can be configured so that line-shaped solar cell patterns having a width of 0.1 mm to 10 mm are arranged at intervals of 0.124 mm to 0.5 mm.

[0034] FIG. 3 is a flowchart for explaining a method for manufacturing a high-efficiency light-transmitting solar cell module according to embodiments of the present invention, and FIG. 4 is a drawing for explaining in more detail a method for manufacturing a high-efficiency light-transmitting solar cell module according to embodiments of the present invention.

[0035] In addition, FIGS. 5 and 6 are drawings for explaining in more detail a method for manufacturing a high-efficiency light-transmitting solar cell module according to one embodiment of the present invention.

[0036] Hereinafter, a method for manufacturing a high-efficiency light-transmitting solar cell module according to an embodiment of the present invention will be described in more detail with reference to FIGS. 3 to 6.

[0037] First, a thin film solar cell layer on a glass substrate (113) is patterned to form a thin film solar cell (110) including solar cell patterns (111) (S210). At this time, the thin film solar cell layer on the glass substrate (130) can be patterned through etching using a laser to form a thin film solar cell including solar cell patterns (111).

[0038] More specifically, according to one embodiment of the present invention, the thin film solar cell can be formed including line type solar cell patterns (111) arranged at regular intervals.

[0039] At this time, the thin film solar cell (110) can be configured so that line-shaped solar cell patterns (111) having a width of 0.1 mm to 10 mm are arranged at intervals of 0.124 mm to 0.5 mm.

[0040] Referring to Fig. 5, when 1 mm wide line-shaped solar cell patterns are arranged at intervals of 0.5 mm, a light transmittance of 33% and an output efficiency of 8.1% are shown, when 1 mm wide line-shaped solar cell patterns are arranged at intervals of 0.25 mm, a light transmittance of 20% and an output efficiency of 9.2% are shown, and when 1 mm wide line-shaped solar cell patterns are arranged at intervals of 0.125 mm, a light transmittance of 11% and an output efficiency of 10.8% are shown.

[0041] In addition, FIG. 6 illustrates the output current and output voltage of a high-efficiency light-transmitting solar cell module according to an embodiment of the present invention. Referring to FIG. 6, as the spacing between solar cell patterns sequentially decreases to 0.5 mm, 0.25 mm, and 0.125 mm, the output current at the same output voltage increases, so it can be seen that the output efficiency increases as the spacing between solar cell patterns decreases.

[0042] When patterning a thin film solar cell layer like this, a thin film solar cell layer on a glass substrate (113) can be patterned through etching using a laser to form a thin film solar cell including solar cell patterns (111).

[0043] At this time, the laser may be a nanolaser, picolaser, or femtolaser. In addition, the laser may be a UV laser with a wavelength of 532 nm or an IR laser with a wavelength of 1032 nm.

[0044] In addition, when patterning using a laser, the thin film solar cell layer may be patterned through etching using a laser on the surface opposite to the surface on which the thin film solar cell layer is formed on the glass substrate (113) to form solar cell patterns (111), or the thin film solar cell layer may be patterned through etching using a laser on the surface on which the thin film solar cell layer is formed on the glass substrate (113) to form solar cell patterns (111).

[0045] Afterwards, a terminal (101) is formed on the thin film solar cell (110).

[0046] A transparent adhesive layer (120) is placed on the thin film solar cell (110) formed in this manner (S220), and a solar cell module (100) is completed through a lamination process of bonding a cover glass substrate on the transparent adhesive layer (120) (S230).

[0047] In this way, the high-efficiency light-transmitting solar cell module according to the present invention can provide a solar cell module that is easy to work with and has both aesthetics and light-transmitting properties as well as the functions of a solar cell, by removing a portion of the thin film during thin film solar cell patterning, thereby enabling electrical connection using the characteristics of the thin film itself without additional metal connection.

[0048] The detailed description of the present invention, as described above, has described specific embodiments. However, various modifications are possible without departing from the scope of the present invention. The technical spirit of the present invention should not be limited to the aforementioned embodiments, but should be defined not only by the claims but also by equivalents thereof.

Claims

1. A first step of forming a thin film solar cell including solar cell patterns by patterning a thin film solar cell layer on a glass substrate; A second step of placing a transparent adhesive layer on the above thin film solar cell; and A third step of bonding a cover glass substrate on the transparent adhesive layer; The above first step is, A method for manufacturing a high-efficiency light-transmitting solar cell module, characterized in that the method comprises forming a thin-film solar cell including solar cell patterns by patterning a thin-film solar cell layer on the glass substrate through etching using a laser.

2. In claim 1, The above first step is, A method for manufacturing a high-efficiency light-transmitting solar cell module, characterized by forming a thin film solar cell including line type solar cell patterns arranged at regular intervals.

3. In claim 2, The above first step is, A method for manufacturing a high-efficiency light-transmitting solar cell module, characterized by forming a thin film solar cell including line-shaped solar cell patterns having a width of 0.1 mm to 10 mm and arranged at intervals of 0.124 mm to 0.5 mm.

4. In claim 1, The above laser, A method for manufacturing a high-efficiency light-transmitting solar cell module characterized by a nanolaser, picolaser or femtolaser.

5. In claim 1, The above laser, A method for manufacturing a high-efficiency light-transmitting solar cell module, characterized by using a UV laser having a wavelength of 532 nm or an IR laser having a wavelength of 1032 nm.

6. In claim 1, The above first step is, A method for manufacturing a high-efficiency light-transmitting solar cell module, characterized in that the method comprises forming a thin film solar cell including solar cell patterns by patterning the thin film solar cell layer through etching using a laser on a surface on which the thin film solar cell layer is formed on a glass substrate.

7. In claim 1, The above first step is, A method for manufacturing a high-efficiency light-transmitting solar cell module, characterized in that the method comprises forming a thin film solar cell including solar cell patterns by patterning the thin film solar cell layer through etching using a laser on the opposite side of the surface on which the thin film solar cell layer is formed on the glass substrate.

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