KR101731540B1 - Method for manufacturing solar cell fiber - Google Patents

Abstract

The present invention relates to a fiber including a flexible solar cell and a method for fabricating the same. The solar cell including the fiber according to the present invention comprises a first electrode, a second electrode having a polarity different from that of the first electrode, a pn junction layer disposed between the first and second electrodes, an ARC disposed adjacent to the first electrode or the pn junction layer, and a fiber formed to surround the first electrode, the second electrode, the pn junction layer, and the ARC on the outside of the first electrode, the second electrode, the pn junction layer, and the ARC.

Description

[0001] METHOD FOR MANUFACTURING SOLAR CELL FIBER [0002]

The present invention relates to a method of manufacturing a solar cell including a fiber, and more particularly, to a method of manufacturing a solar cell including a fiber including a flexible solar cell.

Humans are currently using cheap and easy-to-use petroleum as their primary source of energy, but are looking for a new clean energy source to replace petroleum due to limitations in oil reserves and the adverse impacts of the use of oil on the environment.

As one of these alternative energy sources, solar cells that produce electricity using solar light have been continuously attracted attention, and as a representative of new energy sources such as expecting to reach grid parity soon with remarkable achievement of technology development It has solidified its position.

As a general example of a solar cell, there is a silicon solar cell. Silicon solar cells use silicon p-n junctions. When sunlight is incident on the p-n junction, electrons and holes are separated by the light energy to obtain electrical energy.

Generally, solar cells are manufactured in the form of panels, and they are widely used in buildings and open spaces. In recent years, wearable devices have been receiving the spotlight, and attempts have been made to improve the manner in which solar panels are attached to clothes or the like. This tendency is further reinforced by the development of a flexible flexible solar cell. However, such a method of manufacturing a panel and attaching it to clothes is not good in appearance, and there are various problems such as designing of clothes, dyeing, washing and so on, and commercialization is not proceeding well.

Korean Patent Publication No. 10-2015-0079363 (published on July 20, 2015)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method of manufacturing a solar cell including a fiber that can be applied in a wearable manner so as to supply power without being restricted by installation sites and not through a separate power transmission and distribution system.

Another object of the present invention is to provide a method of manufacturing a solar cell including fibers that can be applied to clothes but overcome problems caused by design, dyeing, and washing.

A solar cell including a fiber according to embodiments of the present invention includes a first electrode; A second electrode different from the first electrode; A p-n junction layer disposed between the first electrode and the second electrode; An ARC disposed adjacent to the first electrode or the p-n junction layer; And fibers formed to surround the first electrode, the second electrode, the p-n junction layer, or the ARC outside the first electrode, the second electrode, the p-n junction layer, and the ARC.

In an embodiment, the pn junction layer is stacked on the second electrode, the first electrode is stacked on the pn junction layer, the ARC is stacked on the pn junction layer adjacent to the first electrode, Lt; / RTI >

In an embodiment, the laminated structure of the second electrode, the pn junction layer, the first electrode, and the ARC has a laminated structure of a cylinder shape or a conduit shape, Wherein the first electrode is formed to surround the pn junction layer outside the pn junction layer, and the ARC surrounds the first electrode outside the first electrode, May be formed in the shape of a.

In an embodiment, the p-n junction layer may be formed of a semiconductor material capable of generating electrical energy in response to light having a wavelength longer than that of light in a visible light region.

In an embodiment, the semiconductor material may comprise at least one semiconductor material selected from gallium arsenide (GaAs), silicon (Si), and germanium (GE).

In an embodiment, the refractive index of the material forming the ARC has a value between the refractive index of the material forming the p-n junction layer and the refractive index of the material forming the fiber.

In an embodiment, the first electrode may be a transparent electrode so that light incident from the outside may penetrate and reach the p-n junction layer.

As an example, the fiber may be a polymer.

A method of fabricating a solar cell including fibers according to embodiments of the present invention includes forming a top semiconductor layer and a bottom semiconductor layer doped with different types on a sacrificial layer formed on a substrate; Forming a first electrode on the upper semiconductor layer; Forming an ARC on the first electrode; Forming a fiber on the sacrificial layer to cover a laminated structure including the upper semiconductor layer, the lower semiconductor layer, the first electrode, and the ARC; Removing the sacrificial layer after the fiber is formed; Forming a second electrode different from the first electrode in a place where the sacrificial layer is removed; Expanding the fiber or adding the fiber so that the fiber covers the second electrode.

The forming of the upper semiconductor layer and the lower semiconductor layer may include doping a semiconductor layer formed on the sacrificial layer to form different types of doping layers on the upper and lower sides of the semiconductor layer, respectively. Or growing a semiconductor layer doped with a type different from that of the semiconductor layer on the semiconductor layer.

As an example, the step of removing the sacrificial layer may include a step of lifting off the sacrificial layer 2 by wet etching and removing the sacrificial layer 2 together with the substrate.

As an embodiment, the method may further include a patterning step for guiding a pattern of the first electrode, the ARC, or the second electrode.

In an embodiment, a solar cell unit including the upper semiconductor layer, the lower semiconductor layer, the first electrode, the ARC, and the second electrode is fabricated on a wafer, and the solar cell unit is adjacent to an edge portion of the wafer The stripe may be formed to have a zigzag pattern of a type connected to each other.

Another method of fabricating a solar cell including fibers according to embodiments of the present invention includes forming a second electrode; Forming an inner semiconductor layer to surround the second electrode;

Forming an outer semiconductor layer of a different type from the inner semiconductor layer so as to surround the inner semiconductor layer; Forming a first electrode different from the second electrode so as to surround the external semiconductor layer; Depositing or coating the ARC to surround the first electrode; And forming fibers to surround the ARC.

In an embodiment, the fiber is a polymer, and the step of forming the fiber may include dipping the polymer to surround the ARC.

In an embodiment, at least one of the first electrode, the second electrode, the inner semiconductor layer, the outer semiconductor layer, the ARC, and the fiber may be formed in a cylinder shape or a conduit shape.

According to embodiments of the present invention, by applying a solar cell including a fiber to a garment or the like in a wearable manner, it is possible to minimize the restriction on the installation place and the like when compared with the conventional solar cell panel, It is possible to supply power without passing through a separate power transmission and distribution system.

In addition, since the solar cell is inserted into the cloth, there is no restriction on the design or dyeing compared to the conventional panel attachment method, and since the inner solar cell is protected by the fiber layer, The risk of damage can be greatly reduced.

Furthermore, it is possible to prevent air pollution and global warming by generating electricity using sunlight which is a new and renewable energy that does not cause environmental pollution.

1 is a cross-sectional view illustrating a detailed configuration of a solar cell including a fiber according to a first embodiment of the present invention.
2 is a cross-sectional view illustrating a detailed configuration of a solar cell including a fiber according to a second embodiment of the present invention.
3 is a schematic view showing a previous step of a manufacturing method of a solar cell including a fiber according to the first embodiment of the present invention.
FIG. 4 is a schematic view showing a later step in the method of manufacturing a solar cell including a fiber according to the first embodiment of the present invention. FIG.
5 is a schematic view showing a manufacturing method of a solar cell including a fiber according to a second embodiment of the present invention.
FIG. 6 is a schematic view illustrating a method of patterning a solar cell including fibers according to an embodiment of the present invention, so as to obtain fibers having a longer length when fabricating the same on a wafer.
7 is a diagram schematically illustrating a process of fabricating a fabric using a solar cell including fibers according to an embodiment of the present invention.

The following detailed description of the present invention is intended to be illustrative,

Reference is made to the accompanying drawings which show, by way of illustration, specific embodiments. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that the various embodiments of the present invention are different, but need not be mutually exclusive. For example, certain features, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention in connection with an embodiment. It is also to be understood that the position or arrangement of the individual components within each disclosed embodiment may be varied without departing from the spirit and scope of the invention. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is to be limited only by the appended claims, along with the full scope of equivalents to which such claims are entitled, if properly explained. In the drawings, like reference numerals refer to the same or similar functions throughout the several views.

Hereinafter, a solar cell including the fiber proposed by the present invention and a manufacturing method thereof will be described with reference to Figs. 1 to 7. Fig.

1 is a cross-sectional view illustrating a detailed configuration of a solar cell including a fiber according to a first embodiment of the present invention. In FIG. 1, a solar cell 1000 including fibers is composed of a solar cell 100 at the center and a fiber 10 surrounding it.

The solar cell 100 includes an anti-reflection coating (ARC) 110, a first electrode 120, p-n junction layers 130 and 140, and a second electrode 150.

The ARC 110 helps prevent light from reaching the p-n junction layers 130 and 140 effectively with a coating layer that prevents reflection of light. The material forming the ARC 110 has a refractive index between the refractive index of the material forming the ARC 110 and the refractive index of the material forming the pn junction layer 130 and 140 and the refractive index of the material forming the fiber 10. [ You can choose.

The first electrode 120 is an electrode through which a current generated by the solar cell 100 passes, and has a polarity opposite to that of the second electrode 150. The first electrode 120 and the second electrode 150 are complementary to each other. If the first electrode 120 has a positive polarity, the second electrode 150 has a negative polarity, and the first electrode 120 Has a negative polarity, the second electrode 150 has a positive polarity. In one embodiment, the first electrode 120 may be formed as a transparent electrode so that light incident from the outside may penetrate and easily reach the p-n junction layers 130 and 140.

The pn junction layers 130 and 140 are a layer in which a pair of p-type semiconductor layers and an n-type semiconductor layer form a junction with each other and are substantially free electrons or holes Is generated. If the first bonding layer 130 is n-type, the second bonding layer 140 is p-type and the first bonding layer 130 is a p- 130 are p-type, the second bonding layer 140 is n-type.

In one embodiment, the solar cell 100 may have a stacked structure of the ARC 110, the first electrode 120, the p-n junction layers 130 and 140, and the second electrode 150. For example, in the solar cell 100, the second electrode 150 is located at the bottom as the center electrode or the bottom electrode, the pn junction layers 130 and 140 are stacked on the second electrode 150, and the pn junction layer 130, and 140, the ARC 110 and the first electrode 120 may be stacked. At this time, the ARC 110 and the first electrode 120 may be formed in the same layer on the pn junction layers 130 and 140 as shown in FIG. 1, or may be formed on the pn junction layers 130 and 140 One electrode 120 may be stacked on the first electrode 120 and the ARC 110 may be stacked on the first electrode 120.

The fibers 10 are formed to surround the solar cell 100. As an example, the fibers 10 may be a polymer. In this structure, the solar cell 100 can be protected from external moisture or impact by the fiber 10, and the fiber 10 can be dyed or colored in various colors, The design of the final product (e.g., cloth or garment) using the product can be freely expressed.

Meanwhile, as the material of the solar cell 100, a material having a smaller band gap than the visible light region can be used. For example, when a solar cell 1000 including a fiber is applied to clothes or cloths and dyed in various colors, light in a visible light region corresponding to the color of the dye is generally reflected from the dye layer to not reach the solar cell do. Therefore, in order to minimize the degradation of power generation performance due to dyeing, it is necessary to construct a solar cell as a material capable of absorbing light in the widest possible range in addition to the visible light region, and a wavelength of light capable of being absorbed As a result, it is advantageous to select a material having a small bandgap as a material for the solar cell. On the other hand, the meaning of absorbing some light here means that it can produce electric energy in response to the light.

In one embodiment, at least one of gallium arsenide (GaAs), silicon (Si), and germanium (Ge) can be used as the solar cell material. In general, the visible light range is from 390 nm to 700 nm, and the maximum wavelength of light that can be absorbed by each material is 880 nm for gallium arsenide, 1,100 nm for silicon and 1,850 nm for germanium, It is possible to absorb light. Furthermore, among these, germanium having the largest wavelength of absorbable light, that is, the smallest band gap, can be used as an optimal solar cell material.

On the other hand, gallium arsenide, silicon or germanium are examples of usable solar cell materials, and the content of the present invention is not limited to solar cells containing fibers using these materials. The solar cell comprising the fiber of the present invention may be fabricated with a variety of materials having suitable bandgaps in addition to gallium arsenide, silicon or germanium.

According to such a configuration, since the solar cell 1000 including the fiber is formed in a structure in which the inside of the solar cell 100 is surrounded by the fiber 10, the solar cell 100 is protected from external moisture, So that the washing and the like are relatively less restricted.

In addition, since the fiber 100 completely encloses the solar cell 100, the solar cell 100 may not be visually exposed to the outside, and even when the solar cell 1000 including the fiber is applied to clothes or the like, It is possible to freely color or dye the outer fibers 10, so that it is possible to realize various colors and designs, and as described above, a material having a small band gap is used as the material of the solar cell 100 The electric production ability is not restricted even if it is dyed regardless, and it is possible to apply an effective wearable form.

2 is a cross-sectional view illustrating a detailed configuration of a solar cell including a fiber according to a second embodiment of the present invention. 2, the solar cell 2000 including the fibers is composed of a central solar cell 200 and the surrounding fibers 20, and the solar cell 200 is made of ARC (Anti-Reflection Coating) 210, a first electrode 220, a pn junction layer 230, and a second electrode 250. However, in FIG. 2, a plurality of layers 210, 220, 230, 240, 250 and 20 constituting a solar cell 2000 including a fiber are sequentially stacked in a cylinder shape. That is, at least one of the plurality of layers 210, 220, 230, 240, 250, 20 is formed in a cylinder shape or a conduit shape.

Specifically, the second electrode 250 is first formed at the center as a center electrode. Next, the pn junction layers 230 and 240 are formed on the outside of the second electrode 250 surrounding the second electrode 250, and the first electrode 220 is formed on the pn junction layers 230 and 240, And is formed outside the pn junction layers 230 and 240 in a surrounding manner. The ARC 210 is formed on the outside of the first electrode 220 so as to surround the first electrode 220. Finally, the solar cell 200 including the fibers is completed by surrounding the formed solar cell 200 with the fibers 20 from the outside.

Meanwhile, the solar cell 2000, the solar cell 200, the ARC 210, the first electrode 220, the pn junction layers 230 and 240, the second electrode 250, And the fiber 20 are the same as those of the solar cell 1000, the solar cell 100, the ARC 110, the first electrode 120, the pn junction layers 130 and 140, The second electrode 150, and the fiber 10. [0060]

When the layers 210, 220, 230, 240, 250, and 20 are formed in a cylindrical shape or a conduit shape, the solar cell performance can be maintained constant regardless of the direction in which the light is incident. For example, in the solar cell 1000 including the fiber of FIG. 1, the layers 110, 120, 130, 140, 150, and 10 are sequentially stacked from the downward direction to the upward direction so that they have a horizontally asymmetric structure (horizontally asymmetric). In this case, there is a difference in the amount of electricity generated depending on whether the light is incident from below or from the upper direction or from the oblique direction. As a result, depending on the arrangement of the solar cell 1000 including the fibers, . On the other hand, in the solar cell 2000 including the fibers of FIG. 2, the layers 210, 220, 230, 240, 250, and 20 are laminated in a cylinder shape or a conduit shape so that they have a 360 degree symmetrical structure, The same power generation performance can be achieved regardless of the direction.

3 is a schematic view showing a previous step of a manufacturing method of a solar cell including a fiber according to the first embodiment of the present invention. Referring to Fig. 3, the previous step of the first embodiment includes (a) step (e).

In the step (a), a substrate in which a sacrificial layer 2 and a semiconductor layer 3 are sequentially stacked on a silicon substrate 1 is prepared. At this time, the sacrificial layer 2 may be a SiO ₂ layer and the semiconductor layer 3 may be a germanium layer.

In step (b), the semiconductor layer 3 is doped through an implantation or a diffusion process to form doped semiconductor layers 130 and 140 on upper and lower sides of the semiconductor layer 3, respectively. In one embodiment, when the semiconductor layer 3 prepared in the step (a) is a p-type doped semiconductor layer, an n-type semiconductor layer is grown on the semiconductor layer 3 instead of doping the semiconductor layer 3 doping layers 130 and 140 of different types may be formed on the upper and lower sides.

When the upper semiconductor layer 130 and the lower semiconductor layer 140 doped with different types are formed, the p-n junction layers 130 and 140 of the solar cell 100 described above function.

3, the lower semiconductor layer 140 is a p-type doping layer and the upper semiconductor layer 130 is an n-type doping layer. However, the lower semiconductor layer 140 may be an n-type doping layer The upper semiconductor layer 130 may be a p-type doped layer.

In the step (c), the first electrode 120 is formed after patterning on the upper semiconductor layer 130. At this time, the first electrode 120 may be a transparent electrode as an upper electrode. At this time, the patterning is performed to guide the position or pattern in which the first electrode 120 is to be formed.

In step (e), the ARC 110 is formed after patterning again in a state where the first electrode 120 is formed. At this time, the patterning is performed to guide the position or pattern in which the ARC 110 is to be formed.

In step (f), a plurality of the first electrodes 120 and the ARC 110 units formed on the silicon substrate are separated from each other by etching or the like.

According to these processes, a stacked structure of the p-n junction layers 130 and 140, the first electrode 120, and the ARC 110 according to the first embodiment is prepared. Next, in Fig. 4, a process of adding the second electrode 150 and the fibers 10 to this laminated structure will be described.

FIG. 4 is a schematic view showing a later step in the method of manufacturing a solar cell including a fiber according to the first embodiment of the present invention. FIG. Referring to FIG. 3, the post-step process of the first embodiment includes steps (f) to (j).

the fibers 10 are formed on the sacrificial layer 2 so as to cover the laminated structure of the p-n junction layers 130 and 140, the first electrode 120 and the ARC 110 in step (f). In one embodiment, the fibers 10 may be formed by spin coating.

In the step (g), the sacrificial layer 2 is lifted off to remove the sacrificial layer 2 together with the silicon substrate 1. In one embodiment, the lift-off may be performed through wet etching or the like.

In step (h), the sacrificial layer 2 is formed in a position where the second electrode 150 is lifted-off. At this time, a patterning or photomasking operation may be performed to induce the second electrode 150 to be appropriately formed at a position of the lower semiconductor layer 140. At this time, patterning or photomasking is performed to guide the position or pattern in which the second electrode 150 is to be formed.

In step (i), the fiber 10 is further expanded or added so that the fiber 10 can cover up to the second electrode 150 portion. In one embodiment, expansion or addition of fibers 10 may be accomplished through additional coating.

In step (j), each solar cell unit is separated to complete the solar cell 1000 including the fibers. At this time, the solar cell units can be separated from each other by a cutting method.

According to the processes of FIGS. 3 and 4 described above, it is possible to manufacture the solar cell 1000 including the fibers according to the first embodiment of the present invention in accordance with the silicon semiconductor process.

5 is a schematic view showing a manufacturing method of a solar cell including a fiber according to a second embodiment of the present invention. Referring to FIG. 5, the manufacturing method of the second embodiment includes steps (k) to (p).

In step (k), a center electrode is first prepared or formed as a second electrode 250.

In step (l), the inner semiconductor layer 240 is formed to surround the second electrode 250. In this case, the inner semiconductor layer 240 may be a p-type or n-type semiconductor layer and may be formed by growing a p-type or n-type semiconductor layer on the second electrode 250.

In step (m), the outer semiconductor layer 230 is formed to surround the inner semiconductor layer 240. At this time, the external semiconductor layer 240 may be a p-type or n-type semiconductor layer and may be formed by growing a p-type or n-type semiconductor layer on the internal semiconductor layer 240. At this time, the inner semiconductor layer 240 and the outer semiconductor layer 230 are formed of semiconductor layers of different types as a complementary relationship. For example, when the inner semiconductor layer 240 is a p-type layer, the outer semiconductor layer 230 is an n-type layer. When the inner semiconductor layer 240 is an n-type layer, the outer semiconductor layer 230 is a p- do. As an example, the semiconductor layer used as the inner semiconductor layer 240 and the outer semiconductor layer 230 may be a low-k metal layer.

The inner and outer semiconductor layers 230 and 240 thus formed function as the p-n junction layers 230 and 240 of the solar cell 200.

In step (n), the first electrode 220 is formed to surround the external semiconductor layer 230. At this time, the first electrode 220 may be a transparent electrode so that light can reach the p-n junction layers 230 and 240 through the transparent electrode. The first electrode 220 has a polarity different from that of the second electrode 250 in a complementary relationship with the second electrode 250.

In step (o), the ARC 210 is deposited or coated to surround the first electrode 220.

In step (p), the fibers 20 are formed to surround the ARC 210. At this time, the fibers 20 may be polymers, and the formation of the fibers 20 may be performed by dipping the polymer.

According to the processes of FIG. 5 described above, it is possible to manufacture the solar cell 2000 including the fibers having the laminated structure of the cylinder type or the conduit type according to the second embodiment of the present invention.

FIG. 6 is a schematic view showing a method of patterning a solar cell including a fiber according to an embodiment of the present invention so as to obtain fibers having a longer length when fabricating the same on a wafer, and FIG. 7 is a cross- Fig. 2 is a diagram schematically showing a process of fabricating a fabric using a solar cell including fibers. Fig.

6A is a diagram showing an example in which a solar cell unit (for example, 100) is formed on a wafer 4 in the form of a stripe 5. 6B is a view showing an example of forming the solar cell unit 100 having one long length as a whole by connecting the stripe structures at the edge portion of the wafer 4. FIG.

The length of the solar cell unit 100 is limited by the width of the wafer 4 when the solar cell unit 100 is manufactured in the form of a stripe 5 as shown in FIG. For example, when the diameter of the wafer 4 is 6 inches, the maximum length of each stripe 5 can not exceed 6 inches, and the length of the solar cell unit 100 is also limited to the same.

On the other hand, when each stripe portion is connected at the edge portion of the wafer 4 as shown in FIG. 6 (b), the entirety of the solar cell unit 100). In this case, it is possible to manufacture the solar cell unit 100 having a length exceeding the diameter of the wafer 4, and since the width of the solar cell unit 100 is usually on the order of tens of microns, It is also possible to form the solar cell unit 100 having a length of several tens of meters.

How long the solar cell unit 100 is formed is directly related to the production of an intermediate material or a final consumer material for commercialization.

For example, when fabric 1020 is fabricated using a solar cell (e.g., 1000) comprising fibers according to the present invention as shown in FIG. 7, it may be desirable to fabricate a solar cell 1010 ). If the length of the solar cell 1000 including fabricated fibers is shorter than the length of the yarn 1010 required for fabric fabrication, 1000) to form a single yarn 1010, and the shorter the length of the solar cell 1000 including the fibers, the greater the burden on the additional process.

6 (b), when the solar cells 100 are formed on the wafer 4, the stripes are connected to each other in the edge region of the wafer 4 to form a solar cell unit 100 as long as possible Can be more advantageous when considering the utilization in products.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.

In addition, although specific terms are used herein, they are used for the purpose of describing the present invention only and are not used to limit the scope of the present invention described in the claims or the claims. Therefore, the scope of the present invention should not be limited to the above-described embodiments, but should be determined by the equivalents of the claims of the present invention as well as the claims of the following.

1000, 2000: solar cell including fibers 100, 200: solar cell, solar cell unit
10, 20: fiber 110, 210: ARC
120, 220: first electrode 130, 140, 230, 240: pn junction layer, semiconductor layer
150, 250: second electrode 1: silicon substrate
2: sacrificial layer 3: semiconductor layer
4: Wafer 5: Striped
1010: Solar cell room 1020: Solar cell cloth

Claims (20)

Forming an upper semiconductor layer and a lower semiconductor layer doped with different types on the sacrificial layer formed on the substrate;
Forming a first electrode on the upper semiconductor layer;
Forming an ARC on the first electrode;
Forming a fiber on the sacrificial layer to cover a laminated structure including the upper semiconductor layer, the lower semiconductor layer, the first electrode, and the ARC;
Removing the sacrificial layer after the fiber is formed;
Forming a second electrode different from the first electrode in a place where the sacrificial layer is removed; And
Expanding the fiber or adding the fiber so that the fiber covers the second electrode. The method according to claim 1,
Wherein forming the upper semiconductor layer and the lower semiconductor layer comprises:
Doping a semiconductor layer formed on the sacrificial layer to form different types of doping layers on the upper and lower semiconductor layers, respectively; or
And growing a semiconductor layer doped with a type different from the semiconductor layer on the semiconductor layer. The method according to claim 1,
Wherein removing the sacrificial layer comprises:
And lifting off the sacrificial layer by wet etching to remove the sacrificial layer together with the substrate. The method according to claim 1,
And a patterning step of guiding a pattern of the first electrode, the ARC, or the second electrode. The method according to claim 1,
Cutting the fiber to separate the solar cell unit including the upper semiconductor layer, the lower semiconductor layer, the first electrode, the ARC, and the second electrode from another adjacent solar cell unit, Wherein the photovoltaic cell is a solar cell. The method according to claim 1,
Wherein the solar cell unit including the upper semiconductor layer, the lower semiconductor layer, the first electrode, the ARC, and the second electrode is manufactured on a wafer,
Wherein the solar cell unit comprises fibers formed so as to have a staggered pattern of a shape in which adjacent stripes are connected to each other at an edge portion of the wafer. The method according to claim 1,
Wherein the upper semiconductor layer and the lower semiconductor layer are pn junction layers,
The pn junction layer is stacked on the second electrode,
The first electrode is stacked on the pn junction layer,
Wherein the ARC comprises fibers that are laminated on or stacked on the pn junction layer adjacent to the first electrode. 8. The method of claim 7,
Wherein the pn junction layer comprises a fiber formed of a semiconductor material capable of producing electrical energy in response to light having a wavelength longer than that of light in a visible light region. 9. The method of claim 8,
Wherein the semiconductor material comprises fibers comprising at least one semiconductor material selected from gallium arsenide (GaAs), silicon (Si), and germanium (GE). 9. The method of claim 8,
Type semiconductor layer and an n-type semiconductor layer formed adjacent to the p-type semiconductor layer, wherein the p-
And a free electron or hole is generated in response to light incident from the outside. 8. The method of claim 7,
Wherein the refractive index of the material forming the ARC comprises a fiber having a value between a refractive index of a material forming the pn junction layer and a refractive index of a material forming the fiber. 8. The method of claim 7,
Wherein the first electrode comprises a transparent electrode and is made of a transparent electrode so that light incident from the outside can be transmitted to reach the pn junction layer. The method according to claim 1,
Wherein the fiber comprises a fiber that is a polymer. delete delete delete delete delete delete delete

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