TW201603306A - Manufacturing method of patterned solar cell billboard - Google Patents

Abstract

A manufacturing method of patterned solar cell billboard comprises steps: firstly forming a photoelectric conversion layer on a first transparent substrate, then forming a patterned blocking layer on the photoelectric conversion layer, next removing the exposed photoelectric conversion layer by sand blasting process through the blocking layer so that the photo electric conversion layer forms with at least a patterned hollow area in , and finally, forming a color layer and a second transparent substrate on the photoelectric conversion layer. The position of at least one color layer is corresponding to at least one hollow area. With the sand blasting process and the blocking layer of the present invention, at least one hollow area with a large area can be formed quickly, and the color layer can be applied cooperatively to form billboard, enhancing the visibility of solar cell billboard under sunlight, and meeting the usage demand.

Description

Patterned solar cell kanban manufacturing method 【0001】

The invention relates to a thin film solar cell, in particular to a method for fabricating a patterned solar cell kanban.

【0002】

The use of energy is closely related to the development of human society. Especially in industrialized countries, it plays a pivotal role. From small food to daily life, and even the development of various industries, it has a great relationship with the use of energy.

[0003]

Energy is divided into exhaustive energy and renewable energy according to its source and utilization, and is mainly used for exhaustive energy such as petroleum, coal mine and nuclear energy; however, since the industrial revolution, humans have been dependent on energy quickly. The increase in exhaustive energy has caused a shortage of supply under a large amount of consumption; and the use of consumable energy will have a significant impact on the environment. Therefore, in order to solve the problem of energy shortage and protect the environment from damage, renewable The importance of energy has also received increasing attention in recent years.

[0004]

Renewable energy, including natural energy from wind, tidal, geothermal and solar energy. Solar cells are more recently considered to be renewable energy because they are more unrestricted and have easy access to energy. Future star. Among them, thin-film solar cells are rapidly growing in the market because of their low cost and large-scale manufacturing characteristics. Thin-film solar cells can be fabricated on substrates by using inexpensive materials such as glass, plastic, ceramics, graphite, and metal sheets. The thickness of the film forming the voltage generation is only a few micrometers, and since the film is a soft substrate, the application flexibility is large. Conventional thin film solar cells use glass as a substrate and are commonly used in canopies, hoods, roofs, and building windows to generate power generation, thereby saving a large amount of electricity and effectively achieving energy saving and carbon saving effects.

[0005]

In order to enhance the appearance of the solar cell, the solar cell can be ablated by a laser to form a patterned display area, and the light source can be used to enhance the light source when the solar cell passes through the solar cell. Aesthetic and artistic value, can be applied to architectural glass or kanban with backlight. However, such solar cells use backlighting to penetrate the solar cell for the viewer to view the image in front, but in the daytime or other environments with sufficient illumination, the pattern produced by the backlight is too low to be effectively rendered. The pattern on the solar cell, and the advertising kanban must have clear display characteristics during day or night, so the above-mentioned patterned solar cell cannot be applied to the advertising kanban.

[0006]

The primary object of the present invention is to improve the problem of poor visibility of patterned solar cells during daytime or other adequate lighting conditions.

【0007】

In order to achieve the above object, the present invention provides a method for fabricating a patterned solar cell kanban, which comprises the following steps:

[0008]

S1: forming a photoelectric conversion layer on a first transparent substrate.

【0009】

S2: forming a patterned barrier layer on the photoelectric conversion layer.

[0010]

S3: removing the exposed photoelectric conversion layer through the barrier layer by a sandblasting process, so that the photoelectric conversion layer forms at least one patterned hollowed out region.

[0011]

S4: Preparing a second transparent substrate.

[0012]

S5: bonding the second transparent substrate and the photoelectric conversion layer away from the side of the first transparent substrate, and forming at least one color layer between the second transparent substrate and the photoelectric conversion layer, the at least one color layer The position corresponding to the at least one hollowed out area completes the fabrication of the patterned solar cell kanban; wherein each of the color layers may be of a different color and displayed in each of the hollowed out regions, so that the patterned solar cell kanban is diverse Color combination.

[0013]

As can be seen from the above description, the present invention has the following features:

[0014]

1. The sandblasting process is used to remove the photoelectric conversion layer to form the at least one hollow region, and match the at least one color region corresponding to at least one hollow region, so that the patterned solar cell kanban can be reflected from the first transparent substrate. The side light is used to present a pattern, which improves the problem of poor visibility of patterns in daylight or other well-lit environments when the conventional solar cell utilizes backlight penetration.

[0015]

Second, at night, using the power collected by the photoelectric conversion layer to use external lighting for illumination, and thus achieve the eye-catching effect of the advertising billboard.

[0016]

3. The arrangement of the color of the patterned solar cell kanban is simply provided by the arrangement of the at least one color layer disposed between the second transparent substrate and the photoelectric conversion layer.

[0017]

4. Using the at least one color layer to correspond to at least one cutout, and matching the at least one color layer of different colors to provide a combination of different colors of the patterned solar cell kanban.

[0045]

10‧‧‧First transparent substrate

[0046]

20‧‧‧ photoelectric conversion layer

[0047]

21‧‧‧Light conversion zone

[0048]

211‧‧‧Transparent conductive layer

[0049]

212‧‧‧Semiconductor layer

[0050]

213‧‧‧Metal conductive layer

[0051]

22‧‧‧Electrical connectors

[0052]

30‧‧‧Block

[0053]

40‧‧‧镂空区

[0054]

50‧‧‧ color layer

[0055]

60‧‧‧Adhesive layer

[0056]

70‧‧‧Encapsulation layer

[0057]

70a‧‧‧Second transparent substrate

[0058]

80‧‧‧Lighting components

[0059]

81‧‧‧Base

[0060]

82‧‧‧Lighting diode

[0061]

90‧‧‧light side

[0062]

S1 ~ S6, P1‧‧‧ steps

[0018]

FIG. 1 is a schematic flow chart of the steps of the present invention.

[0019]

2A to 2F are schematic cross-sectional views showing a process of the present invention.

[0020]

3 is a schematic cross-sectional view showing a photoelectric conversion layer of the present invention.

[0021]

Figure 4 is a schematic exploded view showing the structure of the first embodiment of the present invention.

[0022]

Figure 5 is a schematic exploded view showing the structure of the second embodiment of the present invention.

[0023]

Figure 6 is a schematic exploded view showing the structure of a third embodiment of the present invention.

[0024]

The detailed description and technical content of the present invention will now be described as follows:

[0025]

Referring to FIG. 1 and FIG. 2A to FIG. 2F, the present invention provides a method for fabricating a patterned solar cell kanban, which comprises the following steps:

[0026]

S1: forming a photoelectric conversion layer 20 on a first transparent substrate 10, as shown in FIG. 2A. Further, please refer to "FIG. 3" and "FIG. 4", and the photoelectric conversion layer 20 is composed of plural numbers. The light conversion region 21 is formed by a series connection of the plurality of electrical connectors 22, and each of the light conversion regions 21 is formed on the first transparent substrate 10 in the order of a transparent conductive layer 211, a semiconductor layer 212, and a metal conductive layer 213. In the above, the photoelectric conversion efficiency of the photoelectric conversion layer 20 can be enhanced by using the CIGS photoelectric material, and the higher electric energy is provided to meet the needs of use.

[0027]

S2: forming a barrier layer 30, as shown in FIG. 2B, forming the patterned barrier layer 30 on the photoelectric conversion layer 20, wherein the barrier layer 30 is made of polyethylene (PolyEthylene, PE), poly Polymer material such as Polycarbonate (PC), PolyVinyl Chloride (PVC) or PolyEthylene Terephthalate (PET); in addition, the thickness of the barrier layer 30 and the engraved pattern In terms of fineness or depth, the barrier layer 30 having a relatively thin thickness can produce a finer pattern, and the barrier layer 30 having a thicker thickness can produce a pattern with a stereoscopic effect, and thus, in response to the needs of the user. The barrier layer 30 has a thickness of between 0.1 and 3.0 mm.

[0028]

S3: forming at least one hollow region 40 by a sandblasting process, as shown in FIG. 2C, using the sandblasting process to remove the exposed photoelectric conversion layer 20 through the barrier layer 30, so that the photoelectric conversion layer 20 is patterned. At least one hollowed out zone 40; it is further noted that the present invention defines the formation of the at least one hollowed out zone 40 by means of a sandblasting process, thereby having the advantages of being fast, large, and low cost, due to the material of the barrier layer 30. It is an elastic polymer material, so it can withstand the impact caused by the sand blasting process, and achieve the blocking effect; however, it should be noted that since the light conversion regions 21 in the photoelectric conversion layer 20 are connected in series, In order to avoid the problem that the photoelectric conversion layer 20 is broken and the electric energy cannot be derived, when the exposed photoelectric conversion layer 20 is removed by a sandblasting process to form the at least one hollowed out region 40, the at least one hollowed out region 40 is The area occupied by the light conversion region 21 must be less than 90% of the area of each of the light conversion regions 21. In addition, when the hollowed-out region of the long light-like region 21 is divided into the long-axis direction to divide the light-converting region 21, the electric power is also discharged due to the series disconnection problem, so it is necessary to Note the pattern design of the hollowed out area 40.

[0029]

P1: The barrier layer 30 is removed. As shown in FIG. 2D, in the embodiment, the barrier layer 30 is removed and then the process is continued, but the barrier layer 30 may be retained to directly perform subsequent processes.

[0030]

S4: An encapsulation layer 70 is prepared. In the embodiment of the present invention, the encapsulation layer 70 is a second transparent substrate 70a.

[0031]

S5: the second transparent substrate 70a and the photoelectric conversion layer 20 are combined with each other away from the side of the first transparent substrate 10, as shown in FIG. 2E, and the second transparent substrate 70a and the photoelectric conversion layer 20 are formed. Forming at least one color layer 50, the position of the at least one color layer 50 corresponding to the at least one hollow region 40, completing the fabrication of the patterned solar cell kanban; in addition, in order to respond to the user using the patterned solar cell kanban The epoxy resin may be coated on the photoelectric conversion layer 20 on which the at least one color layer 50 has been formed by coating, thereby forming the encapsulation layer 70, and the epoxy resin is used. The encapsulation layer 70 is formed to achieve the effects of reducing thickness and weight reduction.

[0032]

S6: a light-emitting component 80 is disposed, as shown in FIG. 2F, the light-emitting component 80 is disposed on a light-incident side 90 of the patterned solar cell kanban, and the light-incident side 90 is perpendicular to the first transparent substrate 10 and the The second transparent substrate 70a, in the embodiment, the light-emitting assembly 80 includes an elongated base 81 and a plurality of LEDs 82 disposed on the base 81; the light-emitting diodes 82 are emitted The light enters the patterned solar cell kanban from the light incident side 90, and emits light from the first transparent substrate 10, thereby allowing the patterned solar cell kanban to exhibit color and pattern at night; In addition, the power source of the light-emitting component 80 can be derived from the power generated by the patterned solar cell kanban during the day or directly connected to external power.

[0033]

In addition, in FIG. 2E, the at least one color layer 50 is directly filled in the at least one hollow region 40, and other embodiments are described in the following embodiments; In the first embodiment of the present invention, the at least one color layer 50 can be formed on the second transparent substrate 70a corresponding to at least one hollow region 40 via printing, inkjet or artificial coloring. Then, the first transparent substrate 10 and the second transparent substrate 70a are combined. Referring to FIG. 5, which is a second embodiment of the present invention, the at least one color layer 50 can be directly formed on the second transparent substrate 70. a position of the at least one hollow region 40, and then bonding the first transparent substrate 10 and the second transparent substrate 70a; and in order to enhance the pattern display effect of the patterned solar cell kanban on the first transparent substrate 10, Referring to FIG. 6 , in the third embodiment of the present invention, the pigment may be directly filled into the corresponding at least one hollow region 40 to form the at least one color layer 50 . It should be noted that when the photoelectric conversion layer 20 is sprayed by sand blasting, a part of the first transparent substrate 10 is also sprayed by the blasting to form an atomization effect, and then the method of filling the pigment, that is, The area of the first transparent substrate 10 to be sandblasted can be filled to achieve the effect of color rendering, and the at least one hollowed out area 40 can cooperate with the atomization effect generated by the sandblasting process in the environment in which the light emitting component 80 provides backlight illumination. Further enhance the aesthetics of the pattern.

[0034]

Furthermore, each of the color layers 50 may be of a different color and displayed in each of the hollowed out regions 40 such that the patterned solar cell kanban has a variety of color combinations; in addition, if there are a plurality of adjacent hollowed out regions 40 It is necessary to present the same color, or directly form a color layer 50 having a larger area to cover the adjacent hollowed areas 40, thereby saving manufacturing steps and thereby reducing costs.

[0035]

Continuing to refer to FIG. 2E, in order to firmly bond the first transparent substrate 10 and the second transparent substrate 70a, in step S5, a glue disposed between the first transparent substrate 10 and the second transparent substrate 70a is further utilized. The layer 60 is used to firmly connect the first transparent substrate 10 and the second transparent substrate 70a, wherein the material of the adhesive layer 60 is an ethylene-vinyl acetate copolymer; regarding the arrangement of the adhesive layer 60, the following examples are used. Be explained.

[0036]

As shown in FIG. 4, in the first embodiment of the present invention, the adhesive layer 60 is formed because the at least one color layer 50 is formed at a position corresponding to the at least one hollow region 40 of the second transparent substrate 70a. The at least one color layer 50 is also formed away from one side of the second transparent substrate 70a, thereby bonding the first transparent substrate 10 and the second transparent substrate 70a. As shown in FIG. 5, in the second embodiment of the present invention, since the at least one color layer 50 is directly formed at the position of the at least one hollow region 40, the adhesive layer 60 is formed on the at least one color. The layer 50 is away from one side of the photoelectric conversion layer 20. As shown in FIG. 6 , in the third embodiment of the present invention, since the at least one color layer 50 is filled in the corresponding at least one hollow region 40, the adhesive layer 60 is directly formed on the photoelectric layer. The conversion layer 20 is away from one side of the first transparent substrate 10.

[0037]

In summary, the present invention has the following features:

[0038]

1. The sandblasting process is used to remove the photoelectric conversion layer to form the at least one hollow region, and match the at least one color region corresponding to at least one hollow region, so that the patterned solar cell kanban can be reflected from the first transparent substrate. The side light is used to present a pattern, which improves the problem of poor visibility of patterns in daylight or other well-lit environments when the conventional solar cell utilizes backlight penetration.

[0039]

2. The power generated by the solar cell during the day can provide the illumination component to emit light at night, thereby allowing the patterned solar cell kanban to display the effect of displaying the advertisement billboard at night.

[0040]

Third, the use of the light collected by the photoelectric conversion layer and the use of external lighting for illumination, and thus achieve the eye-catching effect of the advertising billboard.

[0041]

4. The at least one color layer is disposed between the second transparent substrate and the photoelectric conversion layer by printing, inkjet or artificial coloring, thereby simply providing the color of the patterned solar cell kanban.

[0042]

5. Using the at least one color layer to correspond to at least one cutout, and matching the at least one color layer of different colors to provide a combination of different colors of the patterned solar cell kanban.

[0043]

6. The first transparent substrate is formed into a fogging effect by a sand blasting process, so that the patterned solar cell kanban can further enhance the aesthetic appearance of the pattern when the backlight assembly is used to provide backlight.

[0044]

7. The first transparent substrate and the second transparent substrate are stably connected by the adhesive layer.

S1~S6, P1‧‧‧ steps

Claims (10)

[Item 1]
A method for fabricating a patterned solar kanban includes the following steps:
S1: depositing a photoelectric conversion layer on a first transparent substrate;
S2: forming a patterned barrier layer on the photoelectric conversion layer;
S3: removing the exposed photoelectric conversion layer through the barrier layer by a sand blasting process, so that the photoelectric conversion layer forms at least one patterned hollow region;
S4: preparing an encapsulation layer;
S5: bonding the encapsulation layer and the photoelectric conversion layer away from the side of the first transparent substrate, and forming at least one color layer between the encapsulation layer and the photoelectric conversion layer, where the position of the at least one color layer corresponds to The at least one hollowed out area completes the production of the patterned solar kanban. [Item 2]
The method for fabricating a patterned solar kanban according to claim 1, wherein in the step S1, the photoelectric conversion layer is a plurality of strip-shaped light conversion regions and a plurality of electrical connectors connecting the light conversion regions The area occupied by the at least one hollow region in each of the light conversion regions must be less than 90% of the area of each of the light conversion regions. [Item 3]
The method for fabricating a patterned solar kanban according to claim 1, wherein the following steps are further included between steps S3 and S4:
P1: Remove the barrier layer. [Item 4]
The method for fabricating a patterned solar kanban according to claim 1, wherein in the step S4, the encapsulation layer is a second transparent substrate. [Item 5]
The method for fabricating a patterned solar kanban according to claim 4, wherein in the step S5, the at least one color layer is formed on the second transparent substrate by printing, inkjet or artificial coloring. At least one position of the hollow area. [Item 6]
The method for fabricating a patterned solar kanban according to claim 4, wherein in the step S5, the at least one color layer is formed in the corresponding at least one hollowed out area by printing, inkjet or artificial coloring. Inside. [Item 7]
The method for fabricating a patterned solar kanban according to claim 4, wherein in step S5, the first transparent substrate and the second transparent substrate are bonded to each other by an adhesive layer. [Item 8]
The method for fabricating a patterned solar kanban according to claim 1, wherein in step S5, the at least one color layer is formed in the corresponding at least one of printing, inkjet or artificial coloring. In a hollow region, the encapsulation layer is formed by coating, and the encapsulation layer is made of epoxy resin. . [Item 9]
The method for fabricating a patterned solar kanban according to claim 1, wherein the step S5 further comprises a step S6:
S6: a light emitting component electrically connected to the photoelectric conversion layer is disposed on a light incident side of the patterned solar kanban, and the light incident side is perpendicular to the first transparent substrate and the encapsulation layer. [Item 10]
The method for fabricating a patterned solar kanban according to claim 9, wherein in the step S6, the illuminating component further comprises a pedestal and a plurality of illuminating diodes disposed on the pedestal.