KR20120035294A - Solar cell module - Google Patents

Solar cell module Download PDF

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Publication number
KR20120035294A
KR20120035294A KR1020100096700A KR20100096700A KR20120035294A KR 20120035294 A KR20120035294 A KR 20120035294A KR 1020100096700 A KR1020100096700 A KR 1020100096700A KR 20100096700 A KR20100096700 A KR 20100096700A KR 20120035294 A KR20120035294 A KR 20120035294A
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South Korea
Prior art keywords
light
light transmissive
solar cell
adhesive layer
cell module
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KR1020100096700A
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Korean (ko)
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KR101616131B1 (en
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문강석
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엘지전자 주식회사
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Priority to KR1020100096700A priority Critical patent/KR101616131B1/en
Publication of KR20120035294A publication Critical patent/KR20120035294A/en
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy

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  • Photovoltaic Devices (AREA)

Abstract

The solar cell module includes a light transmissive lower substrate; A plurality of solar cells positioned above the light transmissive lower substrate; A light transmissive upper substrate positioned on top of the solar cells; And an adhesive layer positioned between the solar cells and the light transmissive upper substrate, wherein the adhesive layer includes a base material and a light reflecting member dispersed in the base material.

Description

Solar cell module {SOLAR CELL MODULE}

The present invention relates to a solar cell module, and relates to a solar cell module in which a front substrate and a rear substrate for supporting a solar cell are each made of a light transmissive material.

Photovoltaic power generation, which converts light energy into electrical energy using a photoelectric conversion effect, is widely used as a means for obtaining pollution-free energy. And with the improvement of the photoelectric conversion efficiency of a solar cell, the photovoltaic power generation system which uses many solar cell modules is installed also in a private house.

The solar cell module including a plurality of solar cells generated by solar light includes a pair of protection members respectively disposed on upper and lower portions of the solar cell to protect the solar cell from an external environment such as external shock and moisture. .

A typical solar cell module uses a light transmissive substrate as an upper protective member positioned on an upper portion of a solar cell, and uses a sheet of opaque material as a lower protective member positioned on an opposite side of the upper protective member. However, the solar cell module of such a configuration has low light efficiency and light utilization efficiency.

Therefore, in recent years, solar cell modules using light-transmitting substrates as the upper protective member and the lower protective member, respectively, have been developed.

The technical problem to be achieved by the present invention is to provide a solar cell module with increased light efficiency.

According to one aspect of the invention, the solar cell module comprises a light transmitting lower substrate; A plurality of solar cells positioned above the light transmissive lower substrate; A light transmissive upper substrate positioned on top of the solar cells; And an adhesive layer positioned between the solar cells and the light transmissive upper substrate, wherein the adhesive layer includes a base material and a light reflecting member dispersed in the base material.

The base material may include poly vinyl butyral (PVB) or ethyl vinyl acetate (EVA), and the light reflecting member may be made of a white pigment that reflects light in a wavelength band of 600 nm or more. .

The light transmissive lower substrate and the light transmissive upper substrate may be made of glass or polyethylene terephthlate (PET), and the solar cell is disposed on the first electrode and the first electrode on the light transmissive lower substrate. It may include a photoelectric converter and a second electrode positioned on the photoelectric converter.

The upper surface of the adhesive layer is in contact with the entire lower surface of the light transmissive upper substrate, and a portion of the adhesive layer is also filled in the spaces between adjacent solar cells.

The first electrode is made of a conductive transparent electrode including a transparent conductive oxide (TCO).

According to another aspect of the invention, the solar cell module comprises a light transmitting lower substrate; A plurality of solar cells positioned above the light transmissive lower substrate; A light transmissive upper substrate positioned on top of the solar cells; An adhesive layer positioned between the solar cells and the light transmissive upper substrate; And a first light reflecting layer positioned between the solar cells and the adhesive layer.

An upper surface of the first light reflecting layer may contact the entire lower surface of the adhesive layer, and a space between adjacent solar cells may be filled with a portion of the first light reflecting layer, or a portion of the first light reflecting layer and a portion of the adhesive layer may be filled together.

The first light reflection layer may include a white pigment that reflects light in a wavelength band of 600 nm or more.

The solar cell module may further include a second light reflection layer positioned between the adhesive layer and the light transmissive upper substrate.

The upper surface of the second light reflecting layer is in contact with the entire lower surface of the light transmissive upper substrate, and the lower surface is in contact with the entire upper surface of the adhesive layer.

The second light reflecting layer may include a white pigment that reflects light in a wavelength band of 600 nm or less, and the light transmissive lower substrate and the light transmissive upper substrate are made of glass or polyethylene terephthlate (PET). Can be done.

The solar cell may include a first electrode positioned on the light transmissive lower substrate, a photoelectric conversion portion positioned on the first electrode, and a second electrode positioned on the photoelectric conversion portion, wherein the first electrode is a light transmissive conductive oxide. It consists of a conductive transparent electrode containing (Transparent Conductive Oxide, TCO).

According to this feature, the light exiting through the light-transmitting lower substrate and not absorbed by the photoelectric conversion part and exiting outside is incident on the photoelectric conversion part after being reflected by the adhesive layer or the first light reflection layer. Therefore, the light utilization efficiency is increased.

In addition, the light incident through the light transmissive upper substrate is reflected by the adhesive layer or the first and second light reflecting layers and exits to the outside of the module. Therefore, since the light incident through the light transmissive upper substrate is absorbed by the metal layer of the solar cell to prevent the temperature of the solar cell from rising due to radiation, the efficiency of the solar cell due to the radiant heat can be prevented.

Further, when the first light reflecting layer reflects light in the wavelength band of 600 nm or more and the second light reflecting layer reflects light in the wavelength band of 600 nm or less, most of the light incident through the light transmissive upper substrate is second. Since the light is reflected by the reflective layer and the first reflective layer and exits to the outside of the module, it is possible to more effectively prevent a decrease in efficiency of the solar cell due to radiant heat.

1 is a schematic cross-sectional view of a solar cell module according to an embodiment of the present invention.
2 is an enlarged view of an essential part of FIG. 1.
3 is a schematic cross-sectional view of a solar cell module according to another embodiment of the present invention.
4 and 5 are enlarged views of main parts of FIG. 3.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

In the drawings, the thickness of layers, films, panels, regions, etc., are exaggerated for clarity. Like parts are designated by like reference numerals throughout the specification. When a layer, film, region, plate, or the like is referred to as being "on" another portion, it includes not only the case directly above another portion but also the case where there is another portion in between.

On the contrary, when a part is "just above" another part, there is no other part in the middle. In addition, when a part is formed "overall" on another part, it includes not only being formed in the whole surface (or front surface) of another part but also not formed in the edge part.

Next, a solar cell module according to an embodiment of the present invention will be described with reference to the accompanying drawings.

1 is a schematic cross-sectional view of a solar cell module according to an embodiment of the present invention, Figure 2 is an enlarged view of the main part of FIG.

The solar cell module according to the present embodiment includes a plurality of solar cells C1, C2, C3,... Positioned between the light transmissive lower substrate 110, the light transmissive upper substrate 120, and the substrates 110 and 120. The adhesive layer 130 is positioned between the solar cells and the light transmissive upper substrate 120.

The light transmissive lower substrate 110 may be made of glass or a polymer resin. Herein, polyethylene terephthalate (Poly Ethylene Terephthlate, PET) may be used as the polymer resin.

The solar cell includes a first electrode 10 positioned on the light transmissive lower substrate 110, a photoelectric converter 20 positioned on the first electrode 10, and a second electrode disposed on the photoelectric converter 20 ( 30).

The first electrode 10 is made of a conductive transparent electrode including a transparent conductive oxide (TCO).

For example, the first electrode 10 may be made of at least one material selected from tin oxide (SnO 2 ), zinc oxide (ZnO), or indium tin oxide (ITO). It may also be made of a mixed material in which one or more impurities are mixed with the material.

The photoelectric conversion unit 20 may be formed of an amorphous silicon based thin film (p / i / n) thin film, or may be formed of a tandem silicon thin film layer in which an amorphous silicon based thin film and a microcrystalline silicon thin film are stacked.

When the photoelectric conversion unit 20 is formed of a tandem silicon thin film layer, an intermediate transparent conductive layer may be further formed between the amorphous silicon thin film and the microcrystalline silicon thin film. As such, the structure of the photoelectric conversion unit 20 is not limited in the present invention, and may be formed in various types of thin film structures.

The second electrode 30 may be made of one metal selected from gold (Au), silver (Ag), or aluminum (Al), and may be electrically connected to the first electrode 10 of the adjacent solar cells.

For example, referring to FIG. 1, the second electrode 30 of the solar cell C1 is electrically connected to the first electrode 10 of the neighboring solar cell C2. Therefore, the plurality of solar cells C1, C2, C3,... Are connected in series with neighboring solar cells.

The adhesive layer 130 positioned on the solar cells includes the base material 131 and the light reflection member 133 dispersed in the base material.

The base material 131 is a material capable of bonding the light transmissive lower substrate 110 and the light transmissive upper substrate 120, such as poly vinyl butyral (PVB) or ethyl vinyl acetate (EVA). Can be.

The light reflection member 133 dispersed in the base material 131 is made of a white pigment capable of reflecting light in a wavelength band of 600 nm or more. As the white pigment, oxides such as titanium oxide (TiO 2 ) and barium sulfate (BaSO 4 ), nitrides, carbides, and the like can be used.

Since the light reflecting member 133 is made of a white pigment capable of reflecting light in a wavelength band of 600 nm or more, sunlight in a long wavelength (600 nm or more) band that is not photoelectrically converted in the photoelectric conversion part 20 is a light reflecting member. The light is effectively reflected by the adhesive layer 130 including the 133 and is incident again to the photoelectric converter 20. Therefore, photoelectric conversion using long-wavelength sunlight is possible, thereby increasing light utilization efficiency.

In this configuration, the adhesive layer 130 has an upper surface in contact with the entire lower surface of the light transmissive upper substrate 120, and a portion of the adhesive layer 130 is formed in a space between adjacent solar cells C1, C2, C3,. Is filled.

The light transmissive upper substrate 120 may be formed of glass or the like like the light transmissive lower substrate 110. In addition, a transparent polymer sheet, for example, polyethylene terephthalate (PET) bonded to at least one layer may be used as the light transmissive upper substrate 120.

When the light transmissive upper substrate 120 is formed of a PET sheet, the solar cell module has a lighter weight and a lower manufacturing cost.

As described above, the solar cell module of the present embodiment uses the adhesive layer 130 having the light reflecting member 133 dispersed therein instead of the metal reflective layer, and thus has long-term stability even when exposed to the external environment, and expensive metal even in the manufacturing process. No need for vacuum equipment for deposition reduces manufacturing costs.

Hereinafter, another embodiment of the present invention will be described with reference to FIGS. 3 to 5. 3 is a schematic cross-sectional view of a solar cell module according to another embodiment of the present invention, and FIGS. 4 and 5 are enlarged views of main parts of FIG. 3.

In the solar cell module according to the present embodiment, the light transmissive lower substrate 110, the light transmissive upper substrate 120, and the plurality of solar cells C1, C2, C3,... The same can be configured.

Therefore, hereinafter, only the structure positioned between the solar cells C1, C2, C3,... And the light transmissive upper substrate 120 will be described.

In the present embodiment, the first light reflecting layer 140, the adhesive layer 130a, and the second light reflecting layer 150 are sequentially positioned between the second electrode 30 and the light transmissive upper substrate 120.

The first light reflection layer 140 reflects the long wavelength band of sunlight that is not absorbed by the photoelectric converter 20 among the light incident through the light transmissive lower substrate 110 to the photoelectric converter, and has a wavelength of about 600 nm or more. And a white pigment 143 that reflects light in the band.

The pigment 143 may be mixed and used in the medium 141, and the pigment 143 and the medium 141 may be materials known in the art and are not particularly limited.

The first light reflective layer 140 of this configuration may be one of white paint or white foil, and an upper surface of the first light reflective layer 140 contacts the entire lower surface of the adhesive layer 130a.

A portion of the first light reflection layer 140 is filled in the space between adjacent solar cells. Although not shown, a portion of the first light reflective layer 140 and a portion of the adhesive layer 130a may be filled together in the space between adjacent solar cells.

The adhesive layer 130a may be a material capable of bonding the light transmissive lower substrate 110 and the light transmissive upper substrate 120, such as poly vinyl butyral (PVB) or ethyl vinyl acetate (EVA). Can be.

The second light reflecting layer 150 includes a white pigment 153 that can reflect sunlight in a short wavelength band of 600 nm or less among the sunlight incident through the light transmissive upper substrate 120.

Like the first light reflecting layer 140, the second light reflecting layer 150 may be formed by mixing a pigment and a medium. An upper surface of the second light reflecting layer 150 may be a lower portion of the light transmissive upper substrate 120. In contact with the entire surface, the bottom surface is in contact with the entire upper surface of the adhesive layer (130a).

Therefore, among the sunlight incident through the light transmissive upper substrate 120, the light of the short wavelength band is reflected by the second light reflecting layer 150 and exits to the outside of the module, but the light of the long wavelength band is the second light reflecting layer. Pass through the 150 and the adhesive layer (130a).

However, since the first light reflecting layer 140 is disposed below the adhesive layer 130a, the long wavelength band of sunlight passing through the second light reflecting layer 150 and the adhesive layer 130a is reflected by the first light reflecting layer 140 and thus the module. It will exit outside of.

According to this feature, since the light incident through the light-transmissive upper substrate 120 almost all escapes to the outside of the module regardless of the wavelength band, the light incident through the light-transmissive upper substrate is absorbed by the metal layer of the solar cell. Therefore, since the temperature of the solar cell may be prevented from rising due to radiation, the efficiency of the solar cell may be prevented due to radiant heat.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

C1, C2, C3,... Solar Cell 10: First Electrode
20: photoelectric conversion unit 30: second electrode
110: light transmissive lower substrate 120: light transmissive upper substrate
130, 130a: adhesive layer 140: first light reflection layer
150: second light reflection layer

Claims (19)

A light transmissive lower substrate;
A plurality of solar cells positioned above the light transmissive lower substrate;
A light transmissive upper substrate positioned above the solar cells; And
An adhesive layer disposed between the solar cells and the light transmissive upper substrate
Including;
The adhesive layer is a solar cell module comprising a base material and a light reflection member dispersed in the base material. In claim 1,
The base material is a solar cell module including poly vinyl butyral (PVB) or ethyl vinyl acetate (Ethyl Vinyl Acetate, EVA). In claim 1,
The light reflecting member is a solar cell module consisting of a white pigment that reflects light in the wavelength band of 600nm or more. 4. The method according to any one of claims 1 to 3,
The light transmissive lower substrate and the light transmissive upper substrate are made of glass or polyethylene terephthlate (PET). In claim 4,
The solar cell includes a first electrode positioned on the light transmissive lower substrate, a photoelectric conversion portion positioned on the first electrode, and a second electrode positioned on the photoelectric conversion portion. In claim 5,
The upper surface of the adhesive layer is in contact with the entire lower surface of the light transmissive upper substrate. In claim 5,
A portion of the adhesive layer is filled in the space between adjacent solar cells. In claim 5,
The first electrode is a solar cell module consisting of a conductive transparent electrode containing a transparent conductive oxide (TCO). A light transmissive lower substrate;
A plurality of solar cells positioned above the light transmissive lower substrate;
A light transmissive upper substrate positioned above the solar cells;
An adhesive layer disposed between the solar cells and the light transmissive upper substrate; And
A first light reflection layer positioned between the solar cells and the adhesive layer
Solar cell module comprising a. In claim 9,
The upper surface of the first light reflecting layer is in contact with the entire lower surface of the adhesive layer. In claim 9,
A portion of the first light reflecting layer is filled in the space between the adjacent solar cells module. In claim 9,
And a portion of the first light reflecting layer and a portion of the adhesive layer are filled together in the space between the adjacent solar cells. In claim 9,
The first light reflecting layer is a solar cell module comprising a white pigment for reflecting light of a wavelength band of 600nm or more. The method according to any one of claims 9 to 13,
The solar cell module further comprises a second light reflection layer positioned between the adhesive layer and the light transmissive upper substrate. The method of claim 14,
The upper surface of the second light reflecting layer is in contact with the entire lower surface of the light transmissive upper substrate, the lower surface is in contact with the entire upper surface of the adhesive layer. The method of claim 14,
The second light reflecting layer is a solar cell module comprising a white pigment for reflecting light in the wavelength band of 600nm or less. The method of claim 14,
The light transmissive lower substrate and the light transmissive upper substrate are made of glass or polyethylene terephthlate (PET). The method of claim 17,
The solar cell includes a first electrode positioned on the light transmissive lower substrate, a photoelectric conversion portion positioned on the first electrode, and a second electrode positioned on the photoelectric conversion portion. The method of claim 18,
The first electrode is a solar cell module consisting of a conductive transparent electrode containing a transparent conductive oxide (TCO).
KR1020100096700A 2010-10-05 2010-10-05 Solar cell module KR101616131B1 (en)

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Application Number Priority Date Filing Date Title
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KR101616131B1 KR101616131B1 (en) 2016-04-27

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101596623B1 (en) 2015-01-30 2016-02-22 에스케이이노베이션 주식회사 Water-absorbing resin and preparing method thereof
KR101982588B1 (en) * 2017-12-26 2019-05-27 주식회사 포스코 Sunlight Generation Module
KR101982589B1 (en) * 2017-12-26 2019-05-27 주식회사 포스코 Sunlight Generation Module

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001291880A (en) * 2000-01-31 2001-10-19 Sanyo Electric Co Ltd Solar battery module
JP2006073707A (en) * 2004-09-01 2006-03-16 Kyocera Corp Solar cell module
JP2009231813A (en) * 2008-02-27 2009-10-08 Sanyo Electric Co Ltd Solar cell module and method for manufacturing the same
KR20100008558A (en) * 2008-07-16 2010-01-26 삼성코닝정밀유리 주식회사 Solar cell having infrared reflecting layers

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001291880A (en) * 2000-01-31 2001-10-19 Sanyo Electric Co Ltd Solar battery module
JP2006073707A (en) * 2004-09-01 2006-03-16 Kyocera Corp Solar cell module
JP2009231813A (en) * 2008-02-27 2009-10-08 Sanyo Electric Co Ltd Solar cell module and method for manufacturing the same
KR20100008558A (en) * 2008-07-16 2010-01-26 삼성코닝정밀유리 주식회사 Solar cell having infrared reflecting layers

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101596623B1 (en) 2015-01-30 2016-02-22 에스케이이노베이션 주식회사 Water-absorbing resin and preparing method thereof
KR101982588B1 (en) * 2017-12-26 2019-05-27 주식회사 포스코 Sunlight Generation Module
KR101982589B1 (en) * 2017-12-26 2019-05-27 주식회사 포스코 Sunlight Generation Module
WO2019132307A1 (en) * 2017-12-26 2019-07-04 주식회사 포스코 Photovoltaic power generation module
CN111771288A (en) * 2017-12-26 2020-10-13 株式会社Posco Photovoltaic power generation module
US11251322B2 (en) 2017-12-26 2022-02-15 Posco Photovoltaic power generation module
CN111771288B (en) * 2017-12-26 2023-10-20 浦项股份有限公司 Photovoltaic power generation module

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