KR102243383B1 - Side Light transmitting System - Google Patents

Abstract

The present invention includes a first substrate including an organic light emitting material; A coating layer disposed on the first substrate and including a quantum dot; And a solar cell disposed on one side of the first substrate. It includes, and discloses a side light transmission system in which light is transmitted to the solar cell through reflection in the substrate after passing through the coating layer.

Description

Side Light Transmitting System

The present invention relates to a lateral light transmission system.

Glass windows, which are currently widely used, have a simple function of providing light indoors by transmitting sunlight. Therefore, when sunlight is incident on the window vertically, about several percent of the light is reflected and most of the light is transmitted to the rear of the window, that is, the interior. Currently, LSC (Luminescent Solar Concentrator) technology, which transmits sunlight to the side of the window by changing the path of sunlight incident perpendicularly to the surface of a building window by 90 degrees, is being developed in the United States, Europe, and Japan.

This LSC technology is being developed as a technology that transmits light to the side through internal reflection caused by a difference in refractive index with an external air layer by coating a light emitting material on a glass window. However, the lateral light transmission efficiency is still not high, and thus it has not been largely put into practical use.

Accordingly, there has been a demand for technology development that can efficiently transmit light to the side so that the light can be directly used indoors or used as a solar cell power generation system.

Korean Registered Patent No. 1432861, Korean Registered Patent No. 1474045, Korean Registered Patent No. 1379876

In order to solve the above problems, an object of the present invention is to provide a side light transmission system in which sunlight is transmitted to the side of the window rather than the rear side of the window by allowing the path of sunlight incident on the surface of the window to be changed to the side of the window.

In addition, it is an object of the present invention to construct a building-integrated solar cell power generation system that can easily change the path of sunlight so that the installation place of the solar cell installed on the roof of a building or a wide field can be changed to a window frame or a building wall. have.

On the other hand, the technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems that are not mentioned are clearly to those of ordinary skill in the technical field to which the present invention belongs from the following description. It will be understandable.

A side light transmission system according to an embodiment of the present invention includes: a first substrate including at least one of a light emitting material and metal nanoparticles; And a solar cell disposed on one side of the first substrate. Including, light is transmitted to the solar cell through reflection in the substrate.

A coating layer disposed on the first substrate and including a quantum dot; It may further include.

The coating layer may absorb ultraviolet rays from the light.

A second substrate disposed under the first substrate and including a light emitting material; It may further include.

The light-emitting material of the second substrate may serve as a donor or acceptor that causes a fluorescence resonance energy transfer (FRET) phenomenon.

An air layer may be disposed between the first substrate and the second substrate.

A polymer layer disposed under the first substrate and including a polymer and a plurality of tubes disposed within the polymer; A solar cell disposed on one side of the first substrate and the polymer layer; And a reflective layer disposed under the polymer layer. Including, light may be transmitted to the solar cell through reflection in the first substrate and the polymer layer.

One end of the plurality of tubes in the polymer layer may be disposed to face the solar cell, and a polymer of the polymer layer may be disposed inside the tube.

The refractive index of the polymer may be greater than that of the tube.

A coating layer disposed on the first substrate and including a light emitting material; A polymer liquid crystal dispersion layer disposed under the first substrate; And a solar cell disposed on one side of the first substrate. Including, light may be transmitted to the solar cell through reflection in the first substrate after passing through the coating layer.

An air layer may be disposed between the first substrate and the polymer liquid crystal dispersion layer.

The light transmittance of the polymer liquid crystal dispersion layer may be changed depending on whether or not a voltage is applied.

In the side light transmission system according to the present invention, the light that has passed through a window or the like is transmitted to the side, so that the transmitted light can be directly used indoors or as a solar cell power generation system.

In addition, the side light transmission system according to the present invention allows the path of sunlight incident perpendicularly to the glass window surface for a building to be changed to the side of the window, thereby constructing a side light transmission window through which sunlight is transmitted to the side rather than the rear side of the window. have.

In addition, the side light transmission system according to the present invention can easily change the path of sunlight, so that the installation location of the solar cell currently installed on the roof of a building or a wide field can be changed to a window frame or a building wall. It is possible to build.

In addition, the side light transmission system according to the present invention can contribute to energy saving by transmitting light transmitted to the side of the window during the daytime to the interior of the building and using it as indoor lighting.

On the other hand, the effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those of ordinary skill in the art from the following description. I will be able to.

1 is a schematic structural diagram of a side light transmission system according to a first embodiment of the present invention,
2 is a graph showing the luminous intensity from the side of the glass measured in Example 1 and Comparative Example 1 of the present invention,
3 is a schematic structural diagram of a side light transmission system according to a second embodiment of the present invention,
4 is a cross-sectional view taken along line A-A' of FIG. 3,
5 is a graph showing the luminous intensity from the side of the glass measured in Example 2, Comparative Example 2 and Comparative Example 3 of the present invention,
6 is a schematic structural diagram of a side light transmission system according to Examples 3 and 4 of the present invention,
7 is a graph showing the luminous intensity from the side of the glass measured in Examples 3, 4, 4, and 5 of the present invention.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. The embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited to the following embodiments. This embodiment is provided to more completely describe the present invention to those with average knowledge in the art. Therefore, the shape of the element in the drawings is exaggerated to emphasize a more clear description.

The configuration of the present invention for clarifying the solution to the problem to be solved by the present invention will be described in detail with reference to the accompanying drawings based on a preferred embodiment of the present invention, but the same in assigning reference numerals to the components of the drawings. For components, even though they are on different drawings, the same reference numerals are given, and it is to be noted in advance that components of other drawings may be referred to when necessary when describing the drawings.

<Example 1>

1 is a schematic structural diagram of a side light transmission system according to Example 1 of the present invention, and FIG. 2 is a graph showing the luminous intensity from the side of glass measured in Example 1 and Comparative Example 1 of the present invention.

In the side light transmission system 100 according to the first embodiment of the present invention, referring to FIG. 1, a first substrate 110, a coating layer 120, a second substrate 130, an air layer 140, and a solar cell 150 ).

Referring to FIG. 1, light incident on the coating layer 120 is internally reflected through the light emitting material through the first substrate 110 after the coating layer 120 passes through the coating layer 120, and the solar cell 150 on the side is Is delivered to.

The light transmitted to the first substrate 110 is a solar cell on the side through internal reflection in the first substrate 110 due to the difference in refractive index with the air outside the first substrate 110, except for the light entering vertically. It is delivered to 150.

Light is emitted in various directions by the light-emitting material in the first substrate 110. In addition, when the light transmitted into the coating layer 120 is amplified by surface plasmon resonance by a light emitting material, when the light is transmitted to the first substrate 110, it may be transmitted more strongly.

Here, the light-emitting material in the first substrate 110 may be an organic light-emitting material.

It is preferable that the light emitting material in the first substrate 110 contains 0.2 to 2.0 wt%.

Here, there is an effect of maximizing luminous efficiency when the luminous material is in the range of 0.2 to 2.0 wt%.

As the organic light emitting material, it is preferable to use any one or a combination of at least one of MACROLEX Fluorescent Yellow 10GN, a yellow phosphor, MACROLEX Fluorescent Red G, a red phosphor, or DCM, Cumarine6, a green phosphor, and Cumarin466, a blue phosphor.

For example, when a yellow phosphor and a red phosphor are used together, the luminous efficiency can be increased due to resonance emission.

Such a luminous material serves to emit incident light in various directions, thereby changing an incident angle upon incidence into the glass, thereby helping the total reflection of the light to occur in the glass.

The coating layer 120 may be disposed by being stacked on the upper surface of the first substrate 110.

The coating layer 120 may absorb and block ultraviolet rays from incident light.

For example, the coating layer 120 may include quantum dots.

The coating layer 120 may be formed by dispersing quantum dots having a concentration of 1 to 5 wt% in a transparent polymer matrix.

Such quantum dots can absorb electromagnetic waves having a wavelength of 200 nm to 400 nm and emit electromagnetic waves having a wavelength of 400 nm to 800 nm.

The quantum dot may include one of carbon quantum dot and Mn: CGS (Mn-doped copper gallium sulfide) or a mixture.

That is, the coating layer 120 absorbs ultraviolet rays from light to prevent the ultraviolet rays from being transmitted to the first and second substrates 110 and 130, thereby preventing the organic light-emitting material from being damaged by the ultraviolet rays.

As a result, durability and reliability of the first substrate 110 may be improved.

A method of coating the coating layer 120 on the first substrate 110 is not particularly limited, and bar coating, spin coating, spray, inkjet, flexography, screen, It can be formed through methods such as Dip-Coating and Gravure.

Meanwhile, according to the present invention, in Example 1, the substrate may be formed in a plurality of layers in order to improve the side transmission intensity of light.

In this case, the first substrate 110 is coated with the coating layer 120, and an air layer 140 is formed between the first substrate 110 and the second substrate 130, so that the substrates 110 and 130 and the air layer 140 are formed. ), the light is not refracted out of the substrates 110 and 130 due to the difference in refractive index and is internally reflected inside the substrates 110 and 130, thereby being transmitted to the side.

Referring to FIG. 1, an air layer 140 is formed on a first substrate 110 coated with a coating layer 120, and another second substrate 130 is stacked under the first substrate 110.

Here, the second substrate 130 may be formed by dispersing an organic light emitting material in a polymer.

As the polymer, it is preferable to contain at least one of PMMA (polymethylmetaacrylate), PC (polycarbonate), PS (polystyrene), and Acryl resin.

Some of the light transmitted to the second substrate 130 is transmitted to the side through internal reflection in the second substrate 130 due to a difference in refractive index between the outside and the second substrate 130.

Meanwhile, the organic light-emitting material included in the second substrate 130 may serve as a donor or an acceptor that causes a fluorescence resonance energy transfer (FRET) phenomenon.

On the other hand, in FIG. 1, the reflection is made only to the right, but this is exemplary, and the reflection is made not only in the right direction, but also in various directions such as left, front, and rear. When incident on the substrates 110 and 130, reflection is made in the refracted direction. However, light vertically incident on the first substrate 110 passes through the first substrate 110 and is reflected upwards of the first substrate 110 or passes through the air layer to move in the direction in which the second substrate 130 is located. do.

Here, referring to FIG. 2, FIG. 2 shows a graph of the luminous intensity measured from the side of Example 1 and Comparative Example 1.

Here, Comparative Example 1 is a side light transmission system in which the second substrate 130 and the air layer 140 are removed compared to the first embodiment.

Looking at the luminous intensity of Example 1 and Comparative Example 1, it can be seen that Example 1 having the second substrate 130 and the air layer 140 has a higher luminous intensity in a specific wavelength band than that of Comparative Example 1.

<Example 2>

3 is a schematic structural diagram of a side light transmission system according to a second embodiment of the present invention, FIG. 4 is a cross-sectional view taken along line A-A' of FIG. 3, and FIG. 5 is a second embodiment and a comparative example 2 of the present invention. It is a graph showing the luminous intensity from the side of the glass measured in Comparative Example 3.

Side light transmission system 200 according to the second embodiment of the present invention, referring to Figs. 3 and 4, a first substrate 210, a polymer layer 220, a tube 230, a reflective layer 240, and a solar cell. Includes 250.

The first substrate 210 is a film including metal nanoparticles, a light emitting material, and a polymer, and light may be transmitted to the side through reflection inside the film.

Light is emitted in various directions by the light-emitting material in the first substrate 210.

Some of these lights are transmitted to the side through internal reflection in the film due to the difference in refractive index between the outside and the film. The transmitted light is amplified by the surface plasmon resonance by the metal nanoparticles in the film, and is transmitted more strongly to the side of the film.

In addition, looking at the composition ratio of the film, it is preferable that the film material contains 0.2 to 2.0 wt% of the light emitting material and 0.002 to 0.02 wt% of the metal nanoparticles.

It is preferable that the luminescent material is contained in 0.2 to 2.0 wt%, and the metal nanoparticles are preferably included in 0.002 to 0.02 wt%. When the luminous material is in the range of 0.2 to 2.0 wt%, the luminous efficiency is maximized.

In addition, it is preferable that the metal nanoparticles are 0.002 to 0.02 wt%, but if it is less than 0.002 wt%, amplification does not occur well due to the surface plasmon resonance, and if it exceeds 0.02 wt%, the metal particles increase and excitons are generated. As a result, the amplification of the luminous intensity rather falls.

As the light emitting material, it is preferable to use any one or a combination of at least one of MACROLEX Fluorescent Yellow 10GN, a yellow phosphor, MACROLEX Fluorescent Red G, a red phosphor, or DCM, Cumarine6, a green phosphor, and Cumarin466, a blue phosphor.

For example, when a yellow phosphor and a red phosphor are used together, the luminous efficiency can be increased due to resonance emission.

The luminescent material plays a role of radiating incident light in various directions, thereby changing the angle of incidence upon incidence into the glass, thereby helping the total reflection of the light to occur within the glass.

In addition, the metal nanoparticles are preferably silver nanoparticles or gold nanoparticles. Silver nanoparticles or gold nanoparticles can amplify light in the presence of a luminescent material. The reason for the amplification is that the luminous intensity is amplified by the surface plasmon resonance effect along with the luminescent material.

In addition, it is preferable that the metal nanoparticles have a size of 10 to 60 nm, and when the metal nanoparticles have a size of 10 to 60 nm, they are mixed with a light emitting material, so that surface plasmon resonance occurs well.

In addition, as the polymer, it is preferable to contain at least one of PMMA (polymethylmetaacrylate), PC (polycarbonate), PS (polystyrene), and Acryl resin. The polymer plays a role of allowing the light emitting material and metal nanoparticles to be distributed over the entire area of the coating material when light is first incident before the light enters the glass. In addition, it serves to guide some of the light that has not been incident on the first substrate 210 among the light emitted through the light emitting material and the metal nanoparticles to the side.

The polymer layer 220 may include at least one of polymethylmetaacrylate (PMMA), polycarbonate (PC), polystyrene (PS), and acryl resin, and may include a plurality of tubes 230 therein.

Here, one end of each of the plurality of tubes 230 may be disposed to face the solar cell 250.

Here, a polymer may be disposed inside and outside the plurality of tubes 230.

Each of the tubes 230 is preferably composed of an oxide, and may include _{SiO 2.}

Meanwhile, it is preferable that the plurality of tubes 230 have a relatively small refractive index compared to the polymer of the polymer layer 220.

In addition, a reflective layer 240 may be disposed under the polymer layer 220.

The reflective layer 240 may be formed of a white reflective sheet, and may reflect approximately 100% of incident light.

Light incident on the first substrate 210 may be internally reflected through the first substrate 210 and transmitted to the side, and the light transmitted through the first substrate 210 may be transmitted through the tube 230 of the polymer layer 220. And transmitted to the side through total reflection within the tube 230, and the light transmitted through the polymer layer 220 is reflected by the reflective layer 240 and is incident on the tube 230 of the polymer layer 220 again. It may be transmitted to the side through total reflection within the tube 230.

As a result, it is possible to improve lateral light transmission efficiency through internal reflection by designing a plurality of side light transmission routes.

Here, referring to FIG. 4, FIG. 4 shows a graph of the luminous intensity measured from the side of Example 2, Comparative Example 2, and Comparative Example 3. FIG.

Here, Comparative Example 2 is a side light transmission system in which a plurality of tubes 230 are removed compared to Example 2, and Comparative Example 3 is a plurality of tubes 230 are removed compared to Example 2 and the reflective layer 240 is black. It is a side light transmission system composed of color sheets.

Looking at the luminous intensity of Example 2, Comparative Example 2, and Comparative Example 3, Example 2 having a reflective layer 240 of a white reflective sheet and having a plurality of tubes 230 disposed to face the side is Comparative Example 2 And it can be seen that the luminous intensity is higher in a specific wavelength band compared to Comparative Example 3.

<Example 3 and Example 4>

6 is a structural diagram schematically showing a side light transmission system according to Examples 3 and 4 of the present invention, and FIG. 7 is a structure diagram measured in Examples 3, 4, Comparative Example 4, and Comparative Example 5 of the present invention. It is a graph showing the luminous intensity from the side of the glass.

In the side light transmission system 300 according to the third and fourth embodiments of the present invention, referring to FIG. 6, a first substrate 310, a coating layer 320, an air layer 330, and a polymer liquid crystal dispersion layer 340 And a solar cell 350.

The first substrate 310 is a film including metal nanoparticles, a light emitting material, and a polymer, and light may be transmitted to the side through reflection inside the film.

Light is emitted in various directions by the light-emitting material in the first substrate 310.

Some of these lights are transmitted to the side through internal reflection in the film due to the difference in refractive index between the outside and the film. The transmitted light is amplified by the surface plasmon resonance by the metal nanoparticles in the film, and is transmitted more strongly to the side of the film.

In addition, looking at the composition ratio of the first substrate 310, it is preferable that the film material contains 0.2 to 2.0 wt% of the light emitting material and 0.002 to 0.02 wt% of the metal nanoparticles.

It is preferable that the luminescent material is contained in 0.2 to 2.0 wt%, and the metal nanoparticles are preferably included in 0.002 to 0.02 wt%. When the luminous material is in the range of 0.2 to 2.0 wt%, the luminous efficiency is maximized.

In addition, it is preferable that the metal nanoparticles are 0.002 to 0.02 wt%, but if it is less than 0.002 wt%, amplification does not occur well due to the surface plasmon resonance, and if it exceeds 0.02 wt%, the metal particles increase and excitons are generated. As a result, the amplification of the luminous intensity rather falls.

As the light emitting material, it is preferable to use any one of MACROLEX Fluorescent Yellow 10GN, which is a yellow phosphor, MACROLEX Fluorescent Red G, which is a red phosphor, or DCM, Cumarine6, which is a green phosphor, and Cumarin466, which is a blue phosphor.

The luminescent material plays a role of radiating incident light in various directions, thereby changing the angle of incidence upon incidence into the glass, thereby helping the total reflection of the light to occur within the glass.

In addition, the metal nanoparticles are preferably silver nanoparticles or gold nanoparticles. Silver nanoparticles or gold nanoparticles can amplify light in the presence of a luminescent material. The reason for the amplification is that the luminous intensity is amplified by the surface plasmon resonance effect along with the luminescent material.

Here, in Example 3, only one luminescent material of 0.25 wt% Red G was added, and in Example 4, two types of luminescent materials (0.25 wt% of Red G + 0.25 wt% Yellow 10 GN) were added.

In addition, in Example 3, silver was added as metal nanoparticles, and in Example 4, gold and silver were added together as metal nanoparticles.

In addition, it is preferable that the metal nanoparticles have a size of 10 to 60 nm, and when the metal nanoparticles have a size of 10 to 60 nm, they are mixed with a light emitting material, so that surface plasmon resonance occurs well.

The coating layer 320 is stacked and disposed on the first substrate 310.

Looking at the composition ratio of the coating layer 320, it is preferable that the luminescent material in the coating layer 320 contains 0.2 to 2.0 wt%, and the metal nanoparticles contain 0.002 to 0.02 wt%.

When the luminous material is in the range of 0.2 to 2.0 wt%, the luminous efficiency is maximized.

In addition, it is preferable that the metal nanoparticles are 0.002 to 0.02 wt%, but if it is less than 0.002 wt%, amplification does not occur well due to the surface plasmon resonance, and if it exceeds 0.02 wt%, the metal particles increase and excitons are generated. As a result, the amplification of the luminous intensity rather falls.

When light is incident, surface plasmon resonance occurs due to the light emitting material and metal nanoparticles of the coating layer 320 and the first substrate 310.

When light is incident on the surface of a nanometer metal particle, the phenomenon in which electrons on the surface of the metal nanoparticle are excited in an excited state is called a metal nanoparticle surface plasmon. Increase efficiency. There are two mechanisms here. The first is that the energy of electrons excited by the surface plasmon of the metal nanoparticles increases the efficiency of generating excitons of the luminous material in the surrounding area, thereby improving the absorption efficiency of incident light of the luminous material, and the second is to improve the absorption efficiency of the luminous material. The energy of the excited electrons generated by the surface plasmon of the light-emitting material converts the non-emission path of the light-emitting material at the periphery into the light-emitting path, thereby improving the luminous efficiency of the light-emitting material.

As the light emitting material, it is preferable to use any one or a combination of at least one of MACROLEX Fluorescent Yellow 10GN, a yellow phosphor, MACROLEX Fluorescent Red G, a red phosphor, or DCM, Cumarine6, a green phosphor, and Cumarin466, a blue phosphor.

For example, when a yellow phosphor and a red phosphor are used together, the luminous efficiency can be increased due to resonance emission.

The luminescent material plays a role of radiating incident light in various directions, thereby changing the angle of incidence upon incidence into the glass, thereby helping the total reflection of the light to occur within the glass.

An air layer 330 is formed under the first substrate 310, and a polymer liquid crystal dispersion layer 340 is disposed under the first substrate 310 so as to be spaced apart from the air layer 330.

The polymer dispersed liquid crystal (PDLC) layer 340 is one of the liquid crystal cells used in a liquid crystal display (LCD). It controls the transmission of light according to the light scattering intensity and does not require a polarizing plate. There are several types of structures, such as a polymer in which a large number of liquid crystal molecular particles of several micrometers are dispersed, and a liquid crystal is contained in a net-shaped polymer. Without voltage, the orientation of liquid crystal molecules becomes irregular and scattering occurs at the interface with a different refractive index with the medium. When a voltage is applied, the directions of the liquid crystals become even, and the refractive indexes of the liquid crystals coincide to form a transmission state. Although the display becomes bright, the contrast is not secured unless the thickness of the liquid crystal cell is increased, and as a result, the driving voltage increases.

That is, looking at the action, the polymer liquid crystal dispersion layer 340 includes liquid crystal particles and a photosensitive polymer solution. When ultraviolet rays are irradiated to the polymer dispersed liquid crystal layer, the photosensitive polymer is cured, and a number of pores are generated in the polymer dispersion layer, and liquid crystal particles are contained in the pores. In a state in which no voltage is applied, the polymer molecules and liquid crystal particles surrounding the liquid crystal are randomly arranged, so that light cannot be transmitted. When a voltage is applied, the liquid crystals are polarized and arranged with a certain regularity, and polymer molecules are also arranged along the transmission axis.

That is, the light transmittance of the polymer liquid crystal dispersion layer 340 may be changed depending on whether or not a voltage is applied.

As a result, depending on the voltage applied to the polymer liquid crystal dispersion layer 340, the amount of light that has passed through the first substrate 310 can be adjusted to be transmitted or reflected through the polymer liquid crystal dispersion layer 340. The amount of light transmitted to the side may be controlled according to the light transmittance of the dispersion layer 340.

7 is a graph showing the luminous intensity from the side of the glass measured in Examples 3, 4, and 4 and 5 of the present invention.

Here, Example 3 is a light transmission system in which metal nanoparticles contain silver in the structure shown in FIG. 6, and Example 4 is a light transfer system in which metal nanoparticles contain gold in the structure shown in FIG. 6, Comparative Example 4 is a light transmission system in which the air layer 330 and the polymer liquid crystal dispersion layer 340 are removed compared to Example 3, and Comparative Example 5 is the air layer 330 and the polymer liquid crystal dispersion layer 340 compared to Example 4. This is the removed optical transmission system.

Looking at the luminous intensity of Example 3, Example 4, Comparative Example 4, and Comparative Example 5, Example 3 having an air layer 330 and a polymer liquid crystal dispersion layer 340 showed a luminous intensity in a specific wavelength range compared to Comparative Example 4. It can be seen that it is higher, and it can be seen that Example 4 has a higher luminous intensity in a specific wavelength band than that of Comparative Example 5.

In addition, according to whether or not voltage is applied to the polymer liquid crystal dispersion layer 340 (On mode / Off mode), it is possible to control the luminous intensity in each of the third and fourth embodiments.

The detailed description above is to illustrate the present invention. In addition, the above description shows and describes preferred embodiments of the present invention, and the present invention can be used in various other combinations, modifications, and environments. That is, changes or modifications may be made within the scope of the concept of the invention disclosed in the present specification, the scope equivalent to the disclosed contents, and/or the technology or knowledge in the art. The above-described embodiments are to describe the best state for implementing the technical idea of the present invention, and various changes required in the specific application fields and uses of the present invention are also possible. Therefore, the detailed description of the invention is not intended to limit the invention to the disclosed embodiment. In addition, the appended claims should be construed as including other embodiments.

100, 200, 300: optical transmission system

Claims (12)

A first substrate including a light emitting material and metal nanoparticles together; And
A solar cell disposed on one side of the first substrate; Including,
Light is transmitted to the solar cell through reflection within the substrate,
The light-emitting material is an organic light-emitting material and performs resonance light emission by using a yellow phosphor and a red phosphor together,
The first substrate contains 0.002 to 0.02 wt% of metal nanoparticles,
The size of the metal nanoparticles is 10 ~ 60nm,
The metal nanoparticles are a side light transmission system in which gold nanoparticles and silver nanoparticles are included together.
The method of claim 1,
A coating layer disposed on the first substrate and including a quantum dot; Lateral light transmission system comprising a further.
The method of claim 2,
The coating layer is a side light transmission system that absorbs ultraviolet rays from the light.
The method of claim 3,
A second substrate disposed under the first substrate and including a light emitting material; Lateral light transmission system comprising a further.
The method of claim 4,
The light-emitting material of the second substrate serves as a donor or acceptor for causing a fluorescence resonance energy transfer (FRET) phenomenon.
The method of claim 4,
A side light transmission system in which an air layer is disposed between the first substrate and the second substrate.
The method of claim 1,
A polymer layer disposed under the first substrate and including a polymer and a plurality of tubes disposed within the polymer; And
A reflective layer disposed under the polymer layer; Including,
A lateral light delivery system in which light is transmitted to the solar cell through reflection within the first substrate and polymer layer.
The method of claim 7,
One end of the plurality of tubes in the polymer layer is disposed to face the solar cell,
A side light transmission system in which the polymer of the polymer layer is disposed inside the tube.
The method of claim 8,
The refractive index of the polymer is greater than the refractive index of the tube side light transmission system.
The method of claim 1,
A coating layer disposed on the first substrate and including a light emitting material; And
A polymer liquid crystal dispersion layer disposed under the first substrate; Including,
A side light transfer system in which light is transmitted to the solar cell through reflection in the first substrate after passing through the coating layer.
The method of claim 10,
A side light transmission system in which an air layer is disposed between the first substrate and the polymer liquid crystal dispersion layer.
The method of claim 10,
The polymer liquid crystal dispersion layer is a side light transmission system in which the light transmittance is changed depending on whether or not a voltage is applied.

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