TW201310684A - Method for manufacturing solar cell module and solar cell module - Google Patents

Abstract

A method for manufacturing a solar cell module is used for manufacturing a solar cell module and includes the following steps: using a thin film stacking for forming a first solar cell. In addition, after forming a release layer on a light transmissible second lower substrate, a second solar cell is formed on the release layer. Then the release layer and the second lower substrate are peeled off and separated from the second solar cell. Then an adhesive layer is used for cascading the first solar cell and the second solar cell to form the solar cell module. The first solar cell and the second solar cell are manufactured individually and can be manufactured by using existing manufacturing process to achieve simple manufacturing process and increase the production yield rate and have the advantages of enlarging the wavelength range converted by the solar cell module.

Description

Solar battery pack manufacturing method, and solar battery pack

The present invention relates to a battery manufacturing method, and more particularly to a solar battery pack capable of converting light energy into electrical energy and a method of manufacturing the same.

At present, solar cells include a variety of thin film solar cells such as amorphous germanium (a-Si), microcrystalline germanium (μ-Si), polycrystalline germanium (poly-Si) or copper indium gallium selenide (CIGS). Among them, the spectrum absorbable by the amorphous germanium solar cell is in the ultraviolet to visible portion, and the polycrystalline germanium, copper indium gallium selenide or microcrystalline germanium solar cell absorbs a spectrum approximately in the infrared to visible portion. Because the sunlight is full wavelength, in order to fully absorb and convert light of various wavelengths into electric energy, when manufacturing a solar cell, an amorphous germanium solar cell and a polycrystalline germanium or selenium are respectively formed on the upper and lower sides of the substrate. Copper indium gallium solar cells. In the manufacturing process, multiple layers of vapor deposition, sputtering, chemical vapor deposition, or plasma vapor deposition are used to form a thin film on the substrate layer by layer, so the film of the solar cell must be manufactured in the manufacturing process. After many times of high acid-base or high-pressure environment, it not only increases the complexity of control in the manufacturing process, but also makes the material susceptible to damage or aging and reduces the production yield.

Accordingly, an object of the present invention is to provide a solar battery module which can improve solar light conversion efficiency and which has a simple manufacturing process and can improve production yield, and a method of manufacturing the same.

Therefore, the solar cell manufacturing method of the present invention is for manufacturing a solar cell stack, and comprises the steps of: forming a first solar cell by laminating a film. In addition, after forming a release layer on a second substrate that is transparent to light, a second solar cell is formed on the release layer. Next, the release layer and the second lower substrate are peeled off to be separated from the second solar cell. The first solar cell is overlapped with the second solar cell by using an adhesive layer to form the solar cell.

The solar battery module of the present invention comprises: a first solar cell, a second solar cell, and an adhesive layer that is adhered and laminated to the first solar cell and the second solar cell. The first solar cell includes a first substrate that is transparent to light, a first inner electrode that is electrically conductive on the first substrate, and a first inner electrode that is coated on the first inner electrode and converts light into electrical energy. a first photoelectric conversion unit, and a first outer electrode coated on the first photoelectric conversion unit, the first photoelectric conversion unit having a light absorbing layer covering the first internal electrode, and a layer of draping a buffer layer overlying the light absorbing layer. The second solar cell includes a second upper substrate that is transparent to light, a second inner electrode that is electrically conductive on the second upper substrate, and a second photoelectric layer that is coated on the second inner electrode. a conversion unit, and a second outer electrode that is electrically conductive on the second photoelectric conversion unit, the second photoelectric conversion unit has a p-type semiconductor layer and a layer of cladding on the second internal electrode An intrinsic semiconductor layer on the p-type semiconductor layer, and an n-type semiconductor layer overlying the intrinsic semiconductor layer.

The beneficial effect of the invention is that the first solar cell and the second solar cell are separately manufactured separately, and the solar cell is constructed by the adhesive lamination, so that the existing process manufacturing can be used, and the manufacturing process is simple. It can increase the production yield while at the same time expanding the wavelength range in which the solar cell converts light.

The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments.

Referring to Figures 1, 2 and 3, a preferred embodiment of a method of fabricating a solar cell of the present invention is used to fabricate a solar cell stack 1. The solar battery unit 1 includes a first solar battery 2, a second solar battery 3, and an adhesive layer 9 interposed between the first and second solar cells 2, 3.

The first solar cell 2 includes a first substrate 21 that is transparent to light, a first inner electrode 22 that is electrically conductive on the first substrate 21, and a first electrode that is coated on the first inner electrode 22. A photoelectric conversion unit 20, and a first outer electrode 23 that is electrically conductive on the first photoelectric conversion unit 20.

The first photoelectric conversion unit 20 can utilize the photoelectric effect to absorb light and convert it into electrical energy. The first solar cell 2 of the embodiment is a copper indium gallium selenide (CGSI) solar cell, and the first photoelectric conversion unit 20 has a light absorbing layer 40 coated on the first internal electrode 22, and a dicing The buffer layer 50 overlying the light absorbing layer 40.

The second solar cell 3 includes a second upper substrate 33 that is transparent to light, a second inner electrode 34 that is electrically conductive on the second upper substrate 33, and a second inner electrode 34 that is coated on the second inner electrode 34. And a second photoelectric conversion unit 30, and a second outer electrode 35 that is electrically conductive on the second photoelectric conversion unit 30.

The second photoelectric conversion unit 30 can utilize the photoelectric effect to absorb light and convert it into electrical energy. The second solar cell 3 of the present embodiment is an amorphous germanium (a-Si) thin film solar cell, and the second photoelectric conversion unit 30 has a p-type semiconductor layer 80 and a layer of a layer coated on the second internal electrode 34. An intrinsic semiconductor layer 70 overlying the p-type semiconductor layer 80 and a layer of an n-type semiconductor layer 60 overlying the intrinsic semiconductor layer 70.

The adhesive layer 9 is interposed between the first substrate 21 of the first solar cell 2 and the second outer electrode 35 of the second solar cell 3.

The solar cell manufacturing method includes the following steps: performing step 91: forming the first internal electrode 22 in a film shape on the light-permeable first substrate 21, and forming a film on the first internal electrode 22. The light absorbing layer 40 is further formed with a film-like buffer layer 50 on the light absorbing layer 40, and the first photoelectric conversion unit 20 is formed on the first internal electrode 22, and then in the first photoelectric conversion unit 20 The first outer electrode 23 in the form of a film is formed on the buffer layer 50 to constitute the first solar cell 2.

In other words, the first solar cell 2 of the present embodiment is formed by the first substrate 21, the first inner electrode 22, the light absorbing layer 40, the buffer layer 50, and the first outer electrode 23 being combined.

In the preferred embodiment, the first substrate 21 is made of a glass material, but may be made of a light transmissive plastic material. In addition, the first solar cell 2 is a copper indium gallium selenide solar cell, and the first inner electrode 22 is a transparent conductive oxide (TCO), and the light absorbing layer 40 is cadmium sulfide (CdS). The material is made of a material, and the buffer layer 50 is made of a copper indium gallium selenide (CIGS) material. Further, the second outer electrode 35 is made of a molybdenum (Mo) material.

In the preferred embodiment, the step 91 is to form a thin film on the first substrate 21 by using an evaporation or sputtering method to form the first solar cell 2, but not limited thereto. It can be manufactured by means of 2 plating or coating.

Step 92 is further performed: forming the release layer 32 on the second lower substrate 31 that is transparent to light.

It should be noted that the second lower substrate 31 is made of a glass material, but may be made of a light transmissive plastic material. Further, the release layer 32 is made of a polymer material such as parylene. The release layer 32 of the present embodiment is formed on the second lower substrate 31 by a coating method.

Next, step 93 is performed: the second upper substrate 33 that is permeable to light is overlaid on the release layer 32, and the second internal electrode 34 is formed on the second upper substrate 33 to form a film. The p-type semiconductor layer 60 is formed on the second internal electrode 34, and then the intrinsic semiconductor layer 70 is formed on the p-type semiconductor layer 60, and the n-type semiconductor layer 80 is formed into a film shape. The second photoelectric conversion unit 30 is further formed on the semiconductor layer 70, and further on the second internal electrode 34. Then, the second external electrode 35 is formed on the n-type semiconductor layer 80 of the second photoelectric conversion unit 30. The second solar cell 3 is further formed on the release layer 32.

In other words, the second solar cell 3 of the present embodiment is shared by the second upper substrate 33, the second internal electrode 34, the p-type semiconductor layer 60, the intrinsic semiconductor layer 70, the n-type semiconductor layer 80, and the second external electrode 35. Combined.

In the preferred embodiment, the second upper substrate 33 is made of PET (Polyethylene terephthalate) material and is bonded to the release layer 32 by coating, and the release layer 32 is a clip. It is disposed between the second lower substrate 31 and the second upper substrate 33.

In addition, the second solar cell 3 of the preferred embodiment is an amorphous germanium (a-Si) thin film solar cell, and the second inner electrode 34 is a transparent conductive oxide layer (TCO), and the p-type semiconductor layer 60 is non- a crystalline p-type semiconductor film, wherein the intrinsic layer is an amorphous germanium intrinsic type semiconductor film, and the n-type semiconductor layer 80 is an amorphous germanium n-type semiconductor film, and further, the second outer electrode 35 is a film of zinc oxide (ZnO) film .

In the preferred embodiment, a thin film is formed layer by layer on the second upper substrate 33 by a chemical vapor deposition method to constitute the second solar cell 3.

After the second solar cell 3 is formed on the release layer 32, step 94 is performed: the release layer 32 is peeled off, and the second lower substrate 31 is separated from the release layer 32 from the second solar energy. Battery 3. In other words, the second lower substrate 31 and the release layer 32 are separated from the second upper substrate 33.

Since the second upper substrate 33 is made of a PET material and has flexibility, it can be slightly deformed, so that it can be separated from the release layer 32 more smoothly.

Then, the adhesive layer 9 is formed on the second solar cell 3 by coating, and the first solar cell 2 is pasted on the adhesive layer 9 for bonding. The first and second solar cells 2, 3 are stacked and formed to constitute the solar cell 1.

In the preferred embodiment, the adhesive layer 9 is formed between the second outer electrode 35 of the second solar cell 3 and the first substrate 21 of the first solar cell 2. The adhesive layer 9 of the present embodiment is made of ethyl vinyl acetate (EVA) and coated on the first substrate 21 or the second outer electrode 35, and further laminated. And the second solar cells 2, 3, however, the material of the adhesive layer 9 is not limited to this embodiment, and may be a PVB (Polyvinyl butyral) material.

Since the sunlight is near full wavelength light, and the structures of the first solar cell 2 and the second solar cell 3 are respectively a copper indium gallium selenide solar cell and an amorphous germanium thin film solar cell, the energy gap is 1.1 to 1.2, respectively. eV and 1.7~1.8eV, respectively, can absorb light of different wavelengths and convert them into electric energy, thus increasing the conversion efficiency of sunlight.

Furthermore, in the solar cell manufacturing method of the present embodiment, the first and second solar cells 2 and 3 are separately formed, and then the bonding layer 9 is stacked, so that the existing mature equipment and processes can be used. Manufacture, effectively reducing manufacturing complexity and increasing the production yield of the solar cell 1 .

It should be noted that the solar battery module 1 of the preferred embodiment is in use, that is, the second solar battery 3 faces the light source, that is, the light enters from the second upper substrate 33, but the adhesive layer 9 is in progress. In the case of lamination, the first outer electrode 23 and the second upper substrate 33 may be bonded. In this case, the first solar cell 2 faces the light source, and the effect of expanding the wavelength range of the absorbed light is not affected.

It is further explained that since the first and second solar cells 2, 3 are manufactured separately, when the method is executed, step 91 can be exchanged with steps 92, 93, and 94, that is, steps 92 and 93 are sequentially performed first. After 94, step 91 is performed again, and then the first solar cell 2 and the second solar cell 3 are overlapped by the same step 95.

It is worth mentioning that since the first and second solar cells 2, 3 are independently manufactured, the forming order of the layers can be individually adjusted according to the direction of the predetermined illumination, so that the solar cell 1 can effectively absorb light. can. In addition, the second solar cell 3 of the present embodiment may also be a microcrystalline germanium thin film solar cell or a cadmium telluride solar cell, and can also be combined with the first solar cell 2 to achieve the purpose of expanding the wavelength range of light absorption.

The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent.

1. . . Solar battery pack

2. . . First solar cell

20. . . First photoelectric conversion unit

twenty one. . . First substrate

twenty two. . . First inner electrode

twenty three. . . First outer electrode

3. . . Second solar cell

30. . . Second photoelectric conversion unit

31. . . Second lower substrate

32. . . Release layer

33. . . Second upper substrate

34. . . Second inner electrode

35. . . Second outer electrode

40. . . Light absorbing layer

50. . . The buffer layer

60. . . N-type semiconductor layer

70. . . Intrinsic semiconductor layer

80. . . P-type semiconductor layer

9. . . Adhesive layer

91~95. . . step

1 is a schematic flow chart mainly showing a solar battery pack of a preferred embodiment of the solar battery module manufacturing method of the present invention;

Figure 2 is a schematic flow chart showing the preferred embodiment; and

Figure 3 is a block diagram showing the preferred embodiment.

1. . . Solar battery pack

2. . . First solar cell

20. . . First photoelectric conversion unit

twenty one. . . First substrate

twenty two. . . First inner electrode

twenty three. . . First outer electrode

3. . . Second solar cell

30. . . Second photoelectric conversion unit

33. . . Second upper substrate

34. . . Second inner electrode

35. . . Second outer electrode

40. . . Light absorbing layer

50. . . The buffer layer

60. . . N-type semiconductor layer

70. . . Intrinsic semiconductor layer

80. . . P-type semiconductor layer

9. . . Adhesive layer

Claims (7)

A solar battery manufacturing method for manufacturing a solar battery pack comprising the steps of: (A): forming a first solar cell by laminating a film; and (B): illuminating a second A release layer is formed on the lower substrate. Step (C): forming a second solar cell on the release layer; step (D): stripping the release layer and the second lower substrate to be separated from the second solar cell; and step (E): The first solar cell is overlapped with the second solar cell by using an adhesive layer to form the solar cell. According to the solar cell manufacturing method of claim 1, wherein in the step (A), a first internal electrode is formed on a first substrate, and a first internal electrode is formed on the first internal electrode. a photoelectric conversion unit, then forming a first outer electrode on the first photoelectric conversion unit to form the first solar cell, and in the step (C), coating the second upper substrate on the release layer Forming a second internal electrode on the second upper substrate, forming a second photoelectric conversion unit on the second internal electrode, and then forming a second external electrode on the second photoelectric conversion unit to form the second internal electrode. a second solar cell, in the step (E), forming the adhesive layer between the first substrate and the second outer electrode to overlap the first solar cell and the second solar cell to form the solar cell . According to the solar cell manufacturing method of claim 1, wherein in the step (A), a first internal electrode is formed on a first substrate, and a first internal electrode is formed on the first internal electrode. a photoelectric conversion unit, then forming a first outer electrode on the first photoelectric conversion unit to form the first solar cell, and in the step (C), coating the second upper substrate on the release layer Forming a second internal electrode on the second upper substrate, forming a second photoelectric conversion unit on the second internal electrode, and then forming a second external electrode on the second photoelectric conversion unit to form the second internal electrode. a second solar cell, in the step (E), forming the adhesive layer between the first outer electrode and the second upper substrate to overlap the first solar cell and the second solar cell to form the solar cell group. The solar cell manufacturing method according to claim 2, wherein in the step (A), after the first internal electrode is formed on the first substrate, on the first substrate Forming a light absorbing layer, forming a buffer layer on the light absorbing layer to constitute the first photoelectric conversion unit, and the first outer electrode is formed on the buffer layer, in step (C), After the second internal electrode is formed on the second upper substrate, a p-type semiconductor layer is formed on the second internal electrode, and an intrinsic semiconductor layer is formed on the p-type semiconductor layer, followed by the intrinsic semiconductor layer. An n-type semiconductor layer is formed thereon to constitute the second photoelectric conversion unit, and the second external electrode is formed on the n-type semiconductor layer. The solar cell manufacturing method according to claim 2 or 3, wherein in the step (A), after the first internal electrode is formed on the first substrate, the first internal electrode is Forming a p-type semiconductor layer thereon, forming an intrinsic semiconductor layer on the p-type semiconductor layer, and then forming an n-type semiconductor layer on the intrinsic semiconductor layer to constitute the first photoelectric conversion unit, and the first outer An electrode is formed on the n-type semiconductor layer, and in the step (C), after the second internal electrode is formed on the second upper substrate, a light absorbing layer is formed on the second internal electrode, and A buffer layer is formed on the light absorbing layer to constitute the second photoelectric conversion unit, and the second external electrode is formed on the buffer layer. A solar battery pack comprising: a first solar cell comprising a first substrate transparent to light, a first inner electrode electrically conductive on the first substrate, and a first inner electrode a first photoelectric conversion unit that converts light into electrical energy, and a first outer electrode that is coated on the first photoelectric conversion unit, the first photoelectric conversion unit having a layer overlying the first internal electrode a light absorbing layer, and a buffer layer covering the light absorbing layer; a second solar cell comprising a second upper substrate permeable to light, and a layer of electrically conductive on the second upper substrate a second internal electrode, a second photoelectric conversion unit overlying the second internal electrode, and a second outer electrode electrically conductive on the second photoelectric conversion unit, the second photoelectric conversion unit having a p-type semiconductor layer overlying the second internal electrode, an intrinsic semiconductor layer overlying the p-type semiconductor layer, and an n-type semiconductor layer overlying the intrinsic semiconductor layer; and a bond Layer, sandwiched in the first too Between the solar cell and the second cell can, and bonding to the spliced first solar cell and the second solar cell. The solar cell of claim 6, wherein the adhesive layer is interposed between the first substrate of the first solar cell and the second outer electrode of the second solar cell.