CN102237376A - Transmission solar cell module and method for manufacturing transmission solar cell module - Google Patents

Abstract

The invention discloses a penetrating solar cell module which comprises a light-transmitting substrate, a plurality of block-shaped metal electrodes, a plurality of block-shaped photoelectric conversion layers and a plurality of strip-shaped light-transmitting electrodes. Each block-shaped metal electrode is formed on the light-transmitting substrate, each block-shaped photoelectric conversion layer is formed on the corresponding block-shaped metal electrode and the light-transmitting substrate along the first direction, and is formed on the corresponding block-shaped metal electrode and the light-transmitting substrate along the second direction, and each strip-shaped light-transmitting electrode is formed on the corresponding block-shaped photoelectric conversion layer and the light-transmitting substrate along the first direction, and is formed on the corresponding block-shaped photoelectric conversion layer and the block-shaped metal electrode along the second direction. Each of the bulk metal electrodes and each of the bulk photoelectric conversion layers do not contact an adjacent bulk metal electrode and adjacent bulk photoelectric conversion layer along the first direction. The penetrating solar cell module can design diversified light-transmitting block patterns, so that various patterns or character patterns can be projected.

Description

Penetrating solar cell module and method for manufacturing penetrating solar cell module

technical field

The present invention relates to a solar cell module and a method for manufacturing a penetrating solar cell module, in particular to a penetrating solar cell module with a light-transmitting effect and a method for manufacturing a penetrating solar cell module with a light-transmitting effect .

Background technique

Generally speaking, traditional solar cells can be divided into two types: penetrating and non-penetrating. Non-penetrating solar cells have been widely used in various building materials, such as roof tile structures, wall patches, roof panels, etc. And in some special applications, such as glass curtains, transparent roofs, etc., it is necessary to match the penetrating solar cells with light transmission to have optimal aesthetics. Please refer to FIG. 1 . FIG. 1 is a schematic diagram of a permeable solar cell module 10 in the prior art. A conventional transmissive solar cell module 10 includes a transparent substrate 12 , a transparent conductive layer 14 , a photoelectric conversion layer 16 , and an opaque electrode layer 18 . In the conventional see-through solar cell module 10, laser cutting is used to remove part of the opaque electrode layer 18 and photoelectric conversion layer 16, exposing part of the light-transmitting substrate 12 and the light-transmitting conductive layer 14 to achieve the effect of light transmission. Since the laser cutting method requires extremely high working temperature, crystal particles are likely to be produced on the cut surface of the light-transmitting conductive layer 14 or the light-impermeable electrode layer 18, which increases the leakage current of the penetrating solar cell module 10 and even causes the transparent The short circuit between the photoconductive layer 14 and the opaque electrode layer 18 destroys the power generation function. Therefore, how to design a high-efficiency and high-safety penetrating solar cell module is an important task for the current solar industry.

Contents of the invention

The present invention provides a transmissive solar cell module with light transmission effect and a method for manufacturing the transmissive solar cell module with light transmission effect, so as to solve the above problems.

Based on the above purpose, the present invention provides a transmissive solar cell module, which includes a light-transmitting substrate, a plurality of bulk metal electrodes, a plurality of bulk photoelectric conversion layers, and a plurality of strip-shaped light-transmitting electrodes. Each bulk metal electrode is formed on the light-transmitting substrate, each bulk-shaped photoelectric conversion layer is formed on the corresponding bulk metal electrode and the light-transmitting substrate along the first direction, and along a first direction The two directions are formed on the corresponding bulk metal electrodes and the transparent substrate, and each strip-shaped transparent electrode is formed on the corresponding bulk photoelectric conversion layer and the transparent substrate along the first direction, and formed on the corresponding bulk photoelectric conversion layer and the bulk metal electrode along the second direction. Wherein each bulk metal electrode and each bulk photoelectric conversion layer do not contact adjacent bulk metal electrodes and bulk photoelectric conversion layers along the first direction.

Based on the above purpose, the present invention further provides a method for manufacturing a transmissive solar cell module, which includes forming a metal electrode layer on a light-transmitting substrate; In a second direction, part of the metal electrode layer is removed to form a plurality of bulk metal electrodes arranged in a matrix; a photoelectric conversion layer is formed on the plurality of bulk metal electrodes and the transparent substrate; removing part of the photoelectric conversion layer along the first direction to expose part of the plurality of bulk metal electrodes, and removing part of the photoelectric conversion layer along the second direction to expose part of the light-transmitting layer A substrate, whereby a plurality of bulk photoelectric conversion layers arranged in a matrix is formed; a light-transmitting electrode layer is formed on the plurality of bulk metal electrodes, the plurality of bulk photoelectric conversion layers, and the light-transmitting substrate and removing part of the light-transmitting electrode layer along the first direction to form a plurality of strip-shaped light-transmitting electrodes arranged at intervals, so that the plurality of strip-shaped metal electrodes and the plurality of block-shaped light-transmitting electrodes The electrodes are connected in series with each other along the second direction.

According to the above technical solution, the penetrating solar cell module and the method for manufacturing the penetrating solar cell module of the present invention have at least the following advantages and beneficial effects: The present invention improves the traditional manufacturing process to avoid short-circuiting of solar cells in the light transmission area. phenomenon, so the manufacturing method of the penetrating solar cell module of the present invention can improve the product yield to reduce the manufacturing cost; in addition, the penetrating solar cell module of the present invention can design a variety of light-transmitting block patterns, so it can project Various patterns or character patterns, such as light speckles or advertising characters, etc., further greatly improve the practicability of the present invention.

The above description is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present invention more obvious and easy It is understood that a number of embodiments are specifically cited below, and the detailed description is as follows with reference to the accompanying drawings.

Description of drawings

FIG. 1 is a schematic diagram of a conventional penetrating solar cell module.

Fig. 2 is a schematic diagram of a transmissive solar cell module according to a preferred embodiment of the present invention.

FIG. 3 is a schematic flow chart for manufacturing a transmissive solar cell module according to a preferred embodiment of the present invention.

4 to 11 are cross-sectional views of the transmissive solar cell module along the second direction at various manufacturing stages according to the preferred embodiment of the present invention.

Fig. 12 is a schematic diagram of a projection apparatus according to a preferred embodiment of the present invention.

Wherein, the reference signs are explained as follows:

  Penetrating solar cell module

10 12 light transmitting substrate

piece

14 Light-transmitting conductive layer 16 Photoelectric conversion layer

Penetrating solar cell

18 Opaque electrode layer 20

Module

201 solar cell 22 transparent substrate

23 metal electrode layer 24 bulk metal electrode

25 Photoelectric conversion layer 26 Bulk photoelectric conversion layer

27 Light-transmitting electrode layer 28 Strip-shaped light-transmitting electrode

30 Buffer 31 Buffer

Penetrating solar cell

40 Projection equipment 42

Module

44 Motor 46 Pointer group

Detailed ways

Please refer to FIG. 2 . FIG. 2 is a schematic diagram of a transmissive solar cell module 20 according to a preferred embodiment of the present invention. The transmissive solar cell module 20 includes a transparent substrate 22 . The transmissive solar cell module 20 also includes a plurality of bulk metal electrodes 24 formed on the light-transmitting substrate 22 in a matrix, and each bulk first electrode 24 does not contact adjacent blocks along a first direction D1 Shaped metal electrode 24. The transmissive solar cell module 20 also includes a plurality of bulk photoelectric conversion layers 26, and each bulk photoelectric conversion layer 26 is formed in a matrix along the first direction D1 on the corresponding bulk metal electrodes 24 and the light-transmitting substrate 22. , and formed on the corresponding bulk metal electrodes 24 and the light-transmitting substrate 22 along a second direction D2 different from the first direction D1, and each bulk photoelectric conversion layer 26 is not in contact with each other along the first direction D1. adjacent bulk photoelectric conversion layer 26 . The transmissive solar cell module 20 further includes a plurality of strip-shaped light-transmitting electrodes 28, each strip-shaped light-transmitting electrode 28 is formed on the corresponding block-shaped photoelectric conversion layer 26 and the light-transmitting substrate 22 along the first direction D1, and along the first direction D1 The second direction D2 is formed on the corresponding bulk photoelectric conversion layer 26 and the bulk metal electrode 24 . The penetrating solar cell module 20 is composed of a plurality of solar cells 201, wherein the bulk photoelectric conversion layer 26 of each solar cell 201 is used to receive light energy for conversion into electricity, and the bulk metal electrode 24 and the strip-shaped light-transmitting electrode 28 are respectively used as the positive and negative electrodes of the solar cell 201 to output power, so a plurality of bulk metal electrodes 24 and a plurality of strip-shaped light-transmitting electrodes 28 are electrically connected in sequence along the second direction D2, which means that a plurality of solar cells 201 are connected in series along the second direction D2, so the user can adjust the output voltage of the transmissive solar cell module 20 according to the requirement. In addition, the transmissive solar cell module 20 may further include buffer layers 30 , 31 disposed between the bulk photoelectric conversion layer 26 and the strip-shaped light-transmitting electrodes 28 .

Generally speaking, the transparent substrate 22 can be made of soda-lime glass, the bulk metal electrode 24 can be made of molybdenum (Mo), and the bulk photoelectric conversion layer 26 can be made of copper indium gallium selenide (copper indium gallium selenide). , CIGS) compound, the strip light-transmitting electrode 28 can be a conductive layer made of aluminum zinc oxide (AZO) or indium tin oxide (ITO), and the buffer layer 30, 3l can be made of zinc sulfide (ZnS) and essential Composed of zinc oxide (intrinsic ZnO). The materials of the light-transmitting substrate 22 , the bulk metal electrode 24 , the bulk photoelectric conversion layer 26 , the strip-shaped light-transmitting electrodes 28 , and the buffer layers 30 and 31 are not limited to the above-mentioned embodiments, and depend on design requirements. Since soda-lime glass, aluminum zinc oxide (or indium tin oxide), and essential zinc oxide are light-transmitting materials, the light can be transmitted through the penetrating solar cell module along the second direction D2 from the position indicated by the arrow in Figure 2 20, so that the transmissive solar cell module 20 has a good light transmission effect.

Please refer to FIG. 2 and FIG. 3 to FIG. 12. FIG. 3 is a schematic flow chart for manufacturing a penetrating solar cell module 20 according to a preferred embodiment of the present invention, and FIGS. 4 to 12 are respectively a preferred embodiment of the present invention. A cross-sectional view of the module 20 along the second direction D2 at each process stage. The method comprises the steps of:

Step 100: cleaning the transparent substrate 22;

Step 102: forming a metal electrode layer 23 on the transparent substrate 22;

Step 104: removing part of the metal electrode layer 23 along the first direction D1 and the second direction D2, thereby forming a plurality of bulk metal electrodes 24 arranged in a matrix and exposing part of the transparent substrate 22;

Step 106: forming a photoelectric conversion layer 25 on a plurality of bulk metal electrodes 24 and the transparent substrate 22;

Step 108: forming a buffer layer 30 composed of zinc sulfide and a buffer layer 31 composed of intrinsic zinc oxide on the photoelectric conversion layer 25;

Step 110: remove part of the photoelectric conversion layer 25 and the buffer layer 30, 31 along the first direction D1 to expose part of the plurality of bulk metal electrodes 24, and remove part of the photoelectric conversion layer 25 and the buffer layer along the second direction D2 30 to expose part of the light-transmitting substrate 22, thereby forming a plurality of bulk photoelectric conversion layers 26 arranged in a matrix;

Step 112: forming a light-transmitting electrode layer 27 on the plurality of bulk metal electrodes 24, the plurality of bulk-shaped photoelectric conversion layers 26, and the light-transmitting substrate 22;

Step 114: Remove part of the light-transmitting electrode layer 27, part of the buffer layers 30, 31, or part of the bulk photoelectric conversion layer 26 along the first direction D1 to form a plurality of strip-shaped light-transmitting electrodes 28 arranged at intervals , so that the bulk metal electrodes 24 and strip-shaped light-transmitting electrodes 28 of each solar cell 201 are connected in series along the second direction D2; and

Step 116: end.

Herein, the above steps are described in detail respectively, and steps 100 to 114 are respectively corresponding to FIG. 4 to FIG. 11 . First, as shown in FIG. 4 , the transparent substrate 22 can be cleaned first to ensure that impurities in subsequent processes will not be mixed between the deposition material and the transparent substrate 22 . At this time, a blocking layer composed of aluminum oxide (Al ₂ O ₃ ) or silicon dioxide (SiO ₂ ) can be selectively formed on the light-transmitting substrate 22, which has the function of blocking the passage of current, and can also selectively Sodium fluoride (NaF) is formed on the transparent substrate 22 by vapor deposition, which is used to help the CIGS thin film to crystallize on the transparent substrate 22 . Next, as shown in FIGS. 5 and 6 , a molybdenum metal electrode layer 23 can be formed on the light-transmitting substrate 22 using a sputtering machine or other techniques, and then along the first strip by laser cutting or other removal techniques. A part of the metal electrode layer 23 is removed in a direction D1 and a second direction D2, thereby exposing part of the light-transmitting substrate 22 and forming a plurality of bulk metal electrodes 24 arranged in a matrix. As shown in FIGS. 7 to 9 , the photoelectric conversion layer 25 can be sequentially formed on a plurality of bulk metal electrodes 24 and the exposed part of the light-transmitting substrate 22 by using thin film deposition technology or other methods, and will be composed of zinc sulfide. The buffer layer 30 and the buffer layer 31 composed of essential zinc oxide are formed on the photoelectric conversion layer 25, and then a part of the photoelectric conversion layer 25 and the buffer layer 30 are removed along the first direction D1 by a scraper or other removal methods to Part of the plurality of strip-shaped metal electrodes 24 is exposed, and part of the photoelectric conversion layer 25 and buffer layers 30, 31 are removed along the second direction D2 to expose part of the light-transmitting substrate 22, so that the photoelectric conversion layer 25 is cut into arrays A plurality of bulk photoelectric conversion layers 26 are arranged. Each bulk photoelectric conversion layer 26 is formed on the corresponding bulk metal electrode 24 along the first direction, and is formed on two adjacent metal electrodes 24 along the second direction. Essentially, zinc oxide is a kind of transparent film with good photoelectric properties, so as to improve the photoelectric conversion efficiency and power output efficiency of the transmissive solar cell module 20 . Generally speaking, the thin film deposition technology can utilize quaternary co-evaporation, sputtering, and selenization to fabricate CIGS thin films to achieve optimal photoelectric conversion efficiency.

Moreover, as shown in FIG. 10 and FIG. 11 , the user forms the light-transmitting electrode layer 27 on the buffer layer 31, and then removes part of the light-transmitting second electrode layer 27 along the first direction D1, or simultaneously removes part of the block-shaped electrode layer. The photoelectric conversion layer 26 is to form a plurality of strip-shaped light-transmitting electrodes 28 arranged at intervals, so the penetrating solar cell module 20 can include a plurality of solar cells 201, and the bulk metal electrodes 24 of each solar cell 201 are connected with the strip-shaped light-transmitting electrodes 28. The electrodes 28 are connected in series with each other along the second direction D2. The transmissive solar cell module 20 is composed of a strip-shaped light-transmitting electrode 28 and a light-transmitting substrate 22 at the position indicated by the arrow, which can be used to transmit light, thereby generating transmission stripes different from the arrangement direction of the solar cells 201 . Since the manufacturing method of the present invention only forms the light-transmitting substrate 22 and the strip-shaped light-transmitting electrodes 28 in the preset transmission blocks, and the strip-shaped light-transmitting electrodes 28 are isolated by the bulk photoelectric conversion layer 26 in the first direction D1. The bulk metal electrodes 24 will be in contact with each other, so the transmissive solar cell module 20 not only has optimal light transmittance, but also can effectively avoid the short circuit of the two poles of the solar cell 201 due to accidental contact. The material and process sequence of the buffer layers 30 and 31 are not limited to those described in the above embodiments, which means that it is an optional process and depends on design requirements.

The transmissive solar cell module 20 of the present invention improves the traditional manufacturing process to have the functions of optimal light transmittance and higher safety. In other words, the present invention only forms the light-transmitting substrate 22 and the strip-shaped light-transmitting electrodes 28 in the preset transmission blocks, and forms the block-shaped photoelectric conversion layer 26 on the strip-shaped light-transmitting electrodes 28 and the block-shaped light-transmitting electrodes 28 in the first direction D1. Between the metal electrodes 24 , it is possible to avoid a short circuit between the poles of adjacent solar cells 201 due to accidental contact. In addition, since the transmission stripes of the transmissive solar cell module 20 may not be parallel to the disposition direction of each solar cell 201, the transmissive solar cell module 20 can be matched with other types of manufacturing techniques so that the direction of the transmissive stripes is not limited. The arrangement direction of the solar cells 201 presents a variety of patterns, such as dot patterns. Furthermore, the user can further use the dot patterns to arrange patterns or character patterns, thereby greatly improving the practicability of the present invention.

Please refer to FIG. 12 , which is a schematic diagram of a projection device 40 according to a preferred embodiment of the present invention. The projection device 40 includes a transmissive solar cell module 42 , a motor 44 disposed on the bottom plate of the transmissive solar cell module 42 , and a pointer group 46 disposed on the motor 44 . The functions of the transmissive solar cell module 42 having the same numbered components are as described in the above-mentioned transmissive solar cell module 20 , and thus will not be described in detail here. The difference between the process of the transmissive solar cell module 42 and the transmissive solar cell module 20 is that the transmissive solar cell module 42 removes part of the photoelectric conversion layer 25 and the buffer layer 30 along the first direction D1 to form an array type When a plurality of block-shaped photoelectric conversion layers 26 are arranged (step 110), part of the light-transmitting substrate 22 and part of a plurality of block-shaped metal electrodes 24 are exposed; when the buffer layer 31 is formed (step 112), the buffer layer 31 is formed on multiple a bulk photoelectric conversion layer 26, a plurality of bulk metal electrodes 24, and part of the transparent substrate 22; and when forming the transparent electrode layer 27 (step 114), the transparent electrode layer 27 is formed on the transparent substrate 22 , a plurality of bulk metal electrodes 24 , and a plurality of bulk photoelectric conversion layers 26 . Therefore, after step 118 is completed, each strip-shaped light-transmitting electrode 28 of the transmissive solar cell module 42 can be formed on the corresponding block-shaped photoelectric conversion layer 26, the corresponding block-shaped metal electrode 24, and the second direction D2. And on the light-transmitting substrate 22, so that the predetermined transmissive block is only composed of strip-shaped light-transmitting electrodes 28 and the light-transmitting substrate 22, as shown by the arrow, thereby having a light-transmitting effect. Therefore, the transmissive solar cell module 42 can use the above process to draw an array of dotted transmissive areas in any direction, so that the transmissive solar cell module 42 can follow the arrow directions of the first direction D1 and the second direction D2. transmit light.

In addition, the transmissive solar cell module 42 can also use dot patterns to arrange transmissive blocks of various styles of symbols, such as numeral symbols. When the light passes through the projection device 40 to project the image of the digital symbol to a projection wall in the distance through the transmission block, and the pointer group 46 is rotated regularly so that its shadow points to the projected image of each digital symbol in turn, the projection device 40 is Can be considered as a dynamic projected indicator, such as a clock. In addition, the penetrating solar cell module 42 may supply the electric power required by the motor 44 to drive the pointer group 46 to rotate, so that the projection device 40 is a solar clock. Furthermore, the pointer group 46 can also be set on the projection wall, and the projection device 40 simply projects each number symbol to form a clock pattern. To sum up, the penetrating solar cell module of the present invention can design a variety of light-transmitting block patterns, so it can project various patterns or character patterns, such as light patterns or advertising characters, so as to have good Excellent light transmittance and visual aesthetics.

Compared with the prior art, the penetrating solar cell module of the present invention improves the traditional manufacturing process to avoid the short-circuit phenomenon of solar cells in the light transmission area, so the manufacturing method of the penetrating solar cell module of the present invention can improve product yield In order to reduce manufacturing costs; in addition, the penetrating solar cell module of the present invention can design a variety of light-transmitting block patterns, so various patterns or character patterns can be projected, such as light patterns or advertising text, etc., thereby greatly improving The practicality of the invention.

The above descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the claims of the present invention shall fall within the scope of the present invention.

Claims (15)

1. penetration solar module is characterized in that it comprises:

One transparent substrates;

A plurality of reguline metals electrode, it is formed on the described transparent substrates with matrix-style, and each reguline metal electrode is not along the adjacent reguline metal electrode of first direction contact;

A plurality of block photoelectric conversion layers, each block photoelectric conversion layer is formed on corresponding described reguline metal electrode and the described transparent substrates along described first direction with matrix-style, and be formed on corresponding reguline metal electrode and the described transparent substrates along a second direction that is different from described first direction, and each block photoelectric conversion layer is along the adjacent block photoelectric conversion layer of described first direction contact; And

A plurality of strip euphotic electrodes, each strip euphotic electrode is formed on corresponding described block photoelectric conversion layer and the described transparent substrates along described first direction, and be formed on corresponding described block photoelectric conversion layer and the described reguline metal electrode along described second direction, so that described a plurality of reguline metals electrode and described a plurality of strip euphotic electrode are connected mutually along described second direction.

2. penetration solar module as claimed in claim 1 is characterized in that, each strip euphotic electrode is formed on corresponding described block photoelectric conversion layer, described reguline metal electrode and the described transparent substrates in described second direction.

3. penetration solar module as claimed in claim 1 is characterized in that, described penetration solar module also comprises:

One resilient coating, it is formed between described block photoelectric conversion layer and the described strip euphotic electrode, and described resilient coating is made up of zinc sulphide and essential zinc oxide.

4. penetration solar module as claimed in claim 1 is characterized in that, described transparent substrates is a soda-lime glass.

5. penetration solar module as claimed in claim 1 is characterized in that, described reguline metal electrode is made up of molybdenum.

6. penetration solar module as claimed in claim 1 is characterized in that, described block photoelectric conversion layer is made up of the copper indium diselenide gallium compound.

7. penetration solar module as claimed in claim 1 is characterized in that, described strip euphotic electrode is a light transmission conductive layer of being made up of aluminum zinc oxide or indium tin oxide.

8. method that is used for making the penetration solar module is characterized in that it comprises:

On a transparent substrates, form a metal electrode layer;

Remove the described metal electrode layer of part along a first direction and the second direction that is different from described first direction, to form a plurality of reguline metals electrode that array type is arranged;

On described a plurality of reguline metals electrode and described transparent substrates, form a photoelectric conversion layer;

Remove the described photoelectric conversion layer of part with the described a plurality of reguline metals of exposed portions serve electrode along described first direction, and remove the described photoelectric conversion layer of part with the described transparent substrates of exposed portions serve along described second direction, form a plurality of block photoelectric conversion layer that array type is arranged whereby;

On described a plurality of reguline metals electrode, described a plurality of block photoelectric conversion layers and described transparent substrates, form an euphotic electrode layer; And

Remove the described euphotic electrode layer of part to form spaced a plurality of strip euphotic electrode, so that described a plurality of strip metal electrode and described a plurality of block euphotic electrode are connected mutually along described second direction along described first direction.

9. method as claimed in claim 8, it is characterized in that, remove the described photoelectric conversion layer of part along described first direction and comprise along described first direction with the described a plurality of reguline metals of exposed portions serve electrode and remove the described photoelectric conversion layer of part with exposed portions serve described a plurality of reguline metals electrode and the described transparent substrates of part.

10. method as claimed in claim 8 is characterized in that, described method also comprises: form described metal electrode layer on described transparent substrates before, clean described transparent substrates.

11. method as claimed in claim 8 is characterized in that, described method also comprises:

Form a resilient coating between described photoelectric conversion layer and described euphotic electrode layer.

12. method as claimed in claim 8, it is characterized in that, remove the described metal electrode layer of part along described first direction and described second direction and comprise and utilize the laser cutting technique to cut described metal electrode layer along described first direction and described second direction.

13. method as claimed in claim 8, it is characterized in that, remove the described photoelectric conversion layer of part along described first direction and described second direction and comprise and use a scraper to strike off the described photoelectric conversion layer of part along described first direction and described second direction.

14. method as claimed in claim 8 is characterized in that, removes the described euphotic electrode layer of part along described first direction and comprises that use one scraper strikes off the described euphotic electrode layer of part along described first direction.

15. method as claimed in claim 8 is characterized in that, removes the described euphotic electrode layer of part along described first direction and comprises remove the described photoelectric conversion layer of part when described first direction removes the described euphotic electrode layer of part.

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